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Essential oils are characterized by their potency as anti-pathogens and anti-oxidants. However, there is a limitation in the application due to uncontrollable release. Therefore, this approach is focused on designing mesoporous composite for temperature-controlled release of essential oils. Mesoporous composite namely zeolitic imidazole frameworks@microcrystalline cellulose (ZIF@MCC), was successfully synthesized by the immediate growth of ZIF based on Zn and Co separately within MCC matrix. The estimated masses of ZIF within MCC were 263.4 – 296.3 g/kg. Orthorhombic dodecahedron crystalline ZIFs in micro size was massively covered MCC fibrils. Release of thyme and cumin as two essential oils, from mesoporous ZIF@MCC composites was investigated at different temperatures. After 5 days, the release of essential oils were significantly slowed down to be 49.3 – 119.7 mg/g (18.5 – 44.9 %) for ZIF@MCC composites compared to 248.0 – 265.7 mg/g (93.0 – 99.6 %) for MCC. Elevation of temperature was accompanied by slight faster release attributing to the ease liberation of essential oils by heating. Releasing mechanism of essential oils is mainly supposed due to combination between physical in principle as a solute diffusion and chemical processing’s in small relevant.

The chemical compositions of macroalgae are protein; cholesterol, fatty acid, and lignin which mostly construct from hydroxyl and amine groups. The lignin as a key structure in the tissues of macroalgae was modified using the sulfation pathway. A novel environmental friendly adsorbent Cu-BTC@Algal was synthesized by incorporated Cu-BTC nanoparticles onto sulphated-Macroalgae biomass under solvothermal conditions and characterized by XRD, FTIR, and N2 adsorption–desorption isotherms. The removal rate of Cu-BTC@Algal was quite greater than that of Cu-BTC, showing that the adsorption performance of porous Cu-BTC can be improved through the modification of algal. Further study revealed that Cu-BTC@Algal exhibited a fast adsorption rate and selective adsorption ability towards the cationic dyes in aqueous solution. The removal rate was up to 97% for cationic dyes methylene blue (MB) and 68% for methyl orange (MO) at intervals 10 min. The influences including initial concentration, and contact time of MB/MO adsorption onto modified algal biomass, Cu-BTC and Cu-BTC@Algal were investigated in detail. The kinetic study indicated that the adsorption of MB/MO onto Cu-BTC@Algal followed the pseudo second-order model. The isotherm obtained from experimental data fitted the Langmuir model, yielding maximum adsorption capacity of 42, 73 and 162 mg g−1 for algal, Cu-BTC and Cu-BTC@Algal, respectively.

There is a growing potential use of molybdenum disulfide (MoS2) nanosheets loaded in polyvinylidene fluoride (MoS2/PVDF) in the fields of optoelectronics, ion batteries, and energy storage applications. The one-pot hydrothermal route was used to obtain exfoliated MoS2. The MoS2 nanoflakes were used to obtain MoS2/PVDF nanocomposite films by the solution casting process. The weight percent of MoS2 were 0, 0.1, 0.3, 0.5, 1, 3, 5, 10, and 20 wt% of the total weight of PVDF in the nanocomposite films. After annealing of the PVDF and MoS2/PVDF samples at 160 °C, the FTIR study showed many spectral changes including the spectral shift to high wavenumbers and the appearance of new peaks. These spectral changes indicate increasing of crystallinity, strong molecular bonds, and some crystal phase transition from γ to the β phase. Using Davis Mott's relation, the bandgap of MoS2/PVDF nanocomposites before and after annealing was determined. As the concentrations of MoS2 increase, the values of the optical bandgap decrease from 5.72 to 1.83 eV. Annealing the MoS2/PVDF nanocomposite at 160 °C resulted a remarkable decrease in the values of the bandgap energies from 5.64 to 1.16 eV. Tuning the bandgap energy could be achieved by a polynomial fitting to the experimental results. The X-ray diffraction (XRD) showed that PVDF/MoS2 nanocomposite films are amorphous, upon annealing at 160 °C partial crystallization occurred; however, the incorporation of MoS2/PVDF obstructs the crystallization of the MoS2/PVDF nanocomposite films.

This work disseminates the characterization, and facile production of unprecedented amino-functionalized CuNPs synthesized chitosan membrane for application of the purification process of anionic dyes alongside electrochemical properties. Chitosan solution dissolved in an aqueous acetic solution with a 2% acidic concentration, was used to synthesis the membrane, where amino-functionalized CuNPs were dispersed using sonication. Through a hydrothermal solvent process, CuNPs were synthesized through the decomposition of copper (II) acetate monohydrate at extreme temperatures with the presence of (3-aminopropyl) triethoxysilane. There was no presence of impure particles in the CuNPs-membrane, amino-functionalized, from the Energy Dispersive X-ray spectrum. From the Scanning Electron Micrographs, there was the presence of a membrane of amino-functionalized CuNPs-CS. This confirmed the presence of nanocomposites in the CS. membrane. It revealed good properties of the membrane consisting of amino-functionalized CuNPs. As a result, it gives the maximum percent of the extracted sample of anionic dye an efficacy in extraction. Besides, there was an elucidation of the electrical properties of CuNPs, which were amino-functionalized, through tests of galvanostatic charge-discharge in 3 M KOH electrolyte, and cyclic voltammograms. An analysis of electrochemical data showed that a synthesized amino-functionalized CuNPs demonstrated a stable cycling performance and a higher specific capacitance. Therefore, drawing from the results, an electrode with low-cost amino-functionalized CuNPs is sufficient for electrochemical capacitors with aiming for high performance.

A unique method was used to synthesize extremely stable silver stearate nanoparticles (AgStNPs) incorporated in an organic-based monolith. The facile strategy was then used to selectively isolate hemeproteins, myoglobin (Myo) and hemoglobin (Hb). Ethyl alcohol, silver nitrate, and stearic acid were, respectively, utilized as reducing agents, silver precursors, and capping agents. The color changed to cloudy from transparent, indicating that AgStNPs had been formed. AgStNP nanostructures were then distinctly integrated into the natural polymeric scaffold. To characterize the AgStNP–methacrylate polymeric monolith and the silver nanoparticles, energy-dispersive X-ray (EDX), scanning electron microscopy (SEM), and Fourier-transform infrared (FT-IR) spectroscopy were used. The results of the SEM analysis indicated that the AgStNP–methacrylate polymeric monolith’s texture was so rough in comparison with that of the methacrylate polymeric monolith, indicating that the extraction process of the monolith materials would be more efficient because of the extended surface area of the absorbent. The comparison between the FT-IR spectra of AgStNPs, the bare organic monolith, and AgStNP–methacrylate polymeric monolith confirms that the AgStNPs were immobilized on the surface of the organic monolith. The EDX profile of the built materials indicated an advanced peak of the Ag sequence which represented an Ag atom of 3.27%. The results therefore established that the AgStNPs had been successfully integrated into the monolithic materials. Extraction efficiencies of 92% and 97% were used to, respectively, recover preconcentrated Myo and Hb. An uncomplicated method is a unique approach of both fabrication and utilization of the nanosorbent to selectively isolate hemeproteins. The process can further be implemented by using other noble metals.

Polymer monoliths modified by using nanoparticles (NPs) integrate high NP specific surface area with different monolith surface chemistry and high porosity. As a result, they have extensive applications within different fields, whereas nanomaterial-functionalised porous polymer monoliths have elicited considerable interest from investigators. This study is aimed at fabricating organic polymer-based monoliths from polybutyl methacrylate-co-ethylenedimethacrylate (BuMA-co-EDMA) monoliths prior to immobilization of gold or silver metal on the pore surface of the monoliths using reducing reagent (extracts of lemon peels). This was intended to denote a sustainable technique of immobilizing nanoparticles that are advantageous over physical and chemical techniques because it is safe in terms of handling, readily available, environmentally friendly, and cheap. Two different methods were used in the study to effectively immobilize nanoparticles on monolithic components. The outcomes showed that soaking the monolith rod in the prepared nano solution directly and placing it within ovens at temperatures of 80°C constituted the most effective method. Characterisation of the fabricated monolith was undertaken using SEM/EDX analysis, UV-vis. spectra analysis, and visual observation. The SEM analysis showed that nanoparticles were extensively immobilised on the surface polymers. Another peak was attained through EDX analysis, thus confirming the Au atom existence at 2.83% alongside another peak that proved the Ag atom existence at 1.92%. The fabricated components were used as sorbents for purifying protein. The ideal performance was achieved using gold nanoparticles (GNPs) immobilised organic monolith that attained a greater pepsin extraction recovery compared to silver nanoparticles (SNPs) immobilised organic monoliths alongside bare organic-based monolith.

This study aimed at analyzing the performance of a corrosion resistant coating made from tri-iron tetraoxide (Fe3O4) nanoparticles (NPs) and (Butyl-2-methylprop-2-enoate)-grafted alignate/Fe3O4 nanocomposite. Two methods were used to characterize the combination; Thermo Gravimetric Analysis (TGA) and the Differential Scanning Calorimetry (DSC). It was observed that the rate of corrosion of the carbon steel was greatly influenced by the molarities of HCl used, temperature and time of immersion. Corrosion rate was found to increase with increase in molarity of the hydrochloric acid and temperature but was inversely proportional to the time of immersion. Carbon steel was coated with the corrosion resistant combination using the hot-dip coating method. To characterize the coating, Scanning Electron Microscope (SEM), Energy dispersive X-Ray (EDX), Fourier transform infrared (FT-IR) and X-Ray Diffraction (XRD) methods were used. Electrochemical studies (Tafel polarization and cyclic voltametry) showed that the optimum conditions for prevention of corrosion of the carbon steel were 150 °C and immersed time of 2 hrs. The efficiency of coating varied between the 2 combinations, with PBMA-gft-Alg/Fe3O4 nanocomposite being more effective than Fe3O4NPs coating.

Solid solutions from $$(1-x){\mathrm{ZnMn}}_{2}{\mathrm{O}}_{4}/(x){\mathrm{MgFe}}_{2}{\mathrm{O}}_{4}$$ (x = 0.0, 0.1, 0.5, 0.9, 1.0) were obtained by a simple sol–gel procedure. A single-phase tetragonal spinel zinc manganite was identified by X-ray phase analysis for the samples x = 0.0 and 0.1, whereas a single-phase cubic spinel magnesium ferrite was identified for x = 0.5, 0.9, and 1.0. The formation of these phases was confirmed by the analysis of FTIR absorption spectra measured for the obtained samples. A scanning electron microscope was used to identify the different elements in the formed solid solution. Transmission electron microscope together with Rietveld profile method emphasized the nano-nature of the obtained samples. The influence of the composition parameter (x) on the optical properties of the solid solutions was explored utilizing UV–Vis diffuse reflectance spectroscopy measurements. The magnetic measurements revealed the conversion of the paramagnetic nature of ZnMn2O4 samples into ferromagnetic nature as it couples with MgFe2O4 sample in $$(1-x){\mathrm{ZnMn}}_{2}{\mathrm{O}}_{4}/(x){\mathrm{MgFe}}_{2}{\mathrm{O}}_{4}$$ solid solution. The supercapacitor performance of all samples was examined by cyclic voltammetry and galvanostatic charge–discharge studies.

A leading method for hydrogen production that is free of carbon oxides is catalytic methane decomposition. In this research, Fe and Fe–Ni supported catalysts prepared by the wet impregnation method were used in methane decomposition. The effects of doping the parent support (ZrO2) with La2O3 and WO3 were studied. It was discovered that the support doped with La2O3 gave the best performance in terms of CH4 conversion, H2 yield, and stability at the test condition, 800°C and 4,000-ml h−1 g−1 cat. space velocity. The addition of Ni significantly improved the performance of all the monometallic catalysts. The catalysts were characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), temperature-programmed reduction/oxidation (TPR/TPO), thermogravimetric analyzer (TGA), and microscopy (SEM and Raman) techniques. Phases of the different forms of Fe were identified by XRD. BET showed a drastic decline in the specific surface area of the catalysts with respect to the supports. TPR profiles revealed a progressive change in the valency of Fe in its combined form to the zero valence-free metal. The La2O3-promoted support gave the best performance and maintained good stability during the time on stream.

In the present study, preparation of CuBTC-monopol monoliths for use within the microchip solid phase extraction was undertaken through a 20-min UV lamp-assisted polymerization for 2,2-dimethoxy-2-phenyl acetophenone (DMPA), butyl methacrylate (BMA), and ethylene dimethacrylate (EDMA) alongside inclusion of the porogenic solvent system (1-propanol and methanol (1 : 1)). The resultant coating underwent coating using CuBTC nanocrystals in ethanolic solution of ethanolic solution of 1,3,5-benzenetricarboxylic acid (H3BTC, 10 mM) and 10 mM copper(II) acetate Cu(CH3COO)2. This paper reports enhanced extraction, characterization, and synthesis studies for porous CuBTC metal organic frameworks that are marked by different methods including SEM/EDAX analysis, atomic force microscopy (AFM), and Fourier-transform infrared spectroscopy (FT-IR). The evaluation of the microchip’s performance was undertaken as sorbent through retrieval of six toxic dyes (anionic and cationic dyes). Various parameters (desorption and extraction step flow rates, volume of desorption solvent, volume of sample, and type of desorption solvent) were examined to optimize dye extraction using fabricated microchips. The result indicated that CuBTC-monopol monoliths were permeable with the ability of removing impurities and attained high toxic dye extraction recovery (83.4–99.9%). The assessment of reproducibility for chip-to-chip was undertaken by computing the relative standard deviations (RSDs) of the six dyes in extraction. The interbatch and intrabatch RSDs ranged between 3.8 and 6.9% and 2.3 and 4.8%. Such features showed that fabricated CuBTC-monopol monolithic disk polycarbonate microchips have the potential of extracting toxic dyes that could be utilized for treating wastewater.

There has been increased interest in the production of nanoparticles (NP) through green chemistry. This article used durian fruit shell aqueous solution that acts as a reductive preparation of silver NPs. The silver nanoparticles have a size of approximately 25 nm. The NP size uniformity was determined by the SEM and TEM analysis. X-ray diffraction technique was used to characterize crystalline silver nanoparticles face-centered cubic structure. XPS spectrum showed distinct silver peaks on the nanoparticles’ surface. An optical method that was based on surface plasmon resonance (SPR) was used to perform the green Ag NPs aqueous ammonia sensing study. Optical measurement facilitated the ammonia sensing study of Ag NPs that had been prepared. The study also investigated the performance of the optical sensor, thus adding validity to the study. Also, the research sought to determine how the concentration of ammonia in ammonia sensing affects the Ag NPs that had been obtained. The study observed a linear relationship with R2 as the correlation factor which was equal to 0.9831. This was observed from the ammonia concentration plot versus absorption ratio that suggested that there was a linear increase in absorption ratio with increase in ammonia concentration. The study significance is that the room temperature optical ammonia sensor can be used in future for medical diagnosis in the detection of low levels of ammonia in biological fluid like sweat, cerebrospinal fluid, saliva, plasma, or biological samples. This enhances the application of the technique in human biomedical applications.

In this work, the effects of magnetic fields on the refractive index profiles and induced birefringence of polystyrene/MgFe2O4 nanoparticles (15 nm) solutions and thin films were investigated. Both the refractive index and the induced birefringence profiles of the solutions and thin films were investigated as a function of the applied magnetic field strength using the digital two-beam Mach-Zehnder interferometric method. Image processing algorithm, based on the fast Fourier transform (FFT) analysis, was applied to extract the optical phase differences of the recorded micro-interferograms for all samples under investigation. Then the refractive index and birefringence profiles are calculated. A good correlation between the applied magnetic field and the change of refractive index (Δn) was obtained (R2 ~ 0.94). This could be useful for electric energy storage sensors based on the magneto-optical properties of polystyrene/MgFe2O4 solutions and thin films.

Photodegradation has emerged as an environmentally friendly method of decomposing harmful dyes in wastewater. In this study, core-shell Fe3O4/SiO2/ TiO2 nanospheres with magnetic cores were obtained from synthesised magnetic Fe3O4 nanoparticles through the precipitation method, the surface of the magnetic Fe3O4 nanoparticles was coated with a silica (SiO2) layer by hydrolysis of tetramethoxysilane (TMOS) as a silica source, and finally, Fe3O4/SiO2 nanospheres were coated with titanium (TiO2) layer using tetrabutyltitanate (TBT) as a precursor through the sol-gel process. The morphology and structure of the prepared materials were characterised by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), X-ray energy dispersive spectrometry (EDAX), Fourier transform infrared spectroscopy (FT-IR), and atomic force microscopy (AFM). The photocatalytic activities of the prepared core-shell nanospheres were studied using binary azo dyes, namely methyl orange (anionic dye, MO) and methylene blue (cationic dye, MB) in aqueous solution under UV light irradiation (365 nm), and UV-Vis spectrophotometer was utilised to monitor the amount of each dye in the mixture. It was found that 90.2% and 100% of binary MO and MB were removed for 5 h, respectively. The results revealed that the efficiency of the photocatalytic degradation of the core-shell nanospheres was not degreased after five runs that can be used as recyclable photocatalysts. The results show that the performance of the prepared core-shell nanospheres was better than that of commercial TiO2 nanoparticles. Moreover, the magnetic separation properties of the core-shell Fe3O4/SiO2/TiO2 nanospheres can enable the prepared materials to have wider application prospects.

The present study describes the detailed investigations of the solubilization of thiophene derivatives i.e. 5-(2-(benzyloxy) phenyl) thiophene-2-sulfonamide (BPTS) and 5-bromothiophene-2-sulfonamide (BTS) by micellar solution of anionic surfactant, Sodium dodecyl sulphate (SDS). The interaction of SDS in the solution containing aforementioned compounds was investigated by electrical conductivity and UV–vis spectroscopy. The data of electrical conductivity was used to calculate thermodynamic parameters like free energy (ΔGm), enthalpy (ΔHm) and entropy (ΔSm) of micellization of SDS in the presence of thiophenes, whereas UV–vis spectroscopy was used to calculate the extent of solubilization in term of partition coefficient (Kx), free energy of partition (ΔGp), binding constant (Kb) and free energy of binding (ΔGb). The experimental results from thermodynamic parameters reveal that the solubilization of said thiophene derivatives was spontaneous, in addition to enthalpy and entropy driven. The large molecular size, aromatic nature with extensive delocalization and less charge density of BPTS was found to have a negative impact on solubilization of this compound, which was observed from poor binding capacity and inadequate partitioning displayed by this compound.

This paper attempts to explore the synergism of hybrid advanced oxidation processes, which are sono-photo-catalysis and sono-photo-activated two oxidation agents, viz. hydrogen peroxide and potassium persulfate individually using cobalt doped ferric oxide (Co-Fe2O3) as a photocatalyst, which can be excited and promote an electron to initiate the reactions. Degradation of three dye types, viz. eosin B, rhodamine B, and methylene blue have been used as a reaction model. The results revealed the binary techniques, sono-photo-catalysis to degrade eosin B and methylene blue have an antagonistic effect with negative synergy. On the contrary, rhodamine B has a positive synergy value, hence, indicating a synergistic effect. The ternary technique, which was coupling sono-photo-catalysis with the optimum amount of K2S2O8 raised the mineralization and showed a significant positive synergism effect for K2S2O8 (39.89%).

To investigate the nature of 3d-4f exchange interactions in III-Nitride semiconductors, Ti-Ce co-doped AlN were studied using first principles calculations. The calculations were performed using supercell approach with varying dopant concentration and different inter-dopant separation. The configuration with dopant located as nearest neighbor distance and diluted concentration of 3.125% was found most stable. The results exhibited prominent evidence of 3d-4f-5d strong hybridization suggesting 3d-4f direct exchange interactions which may play valuable role to exploit the system as high Curie temperature ferromagnetic semiconductors for use in spintronics. Moreover, metal to metal charge transfer was also observed in the materials which may be exploited for their use in electrochemical applications. The 4f-5d and 3d-5d hybridizations were observed that predicts excellent luminescence phenomena in the materials. The presence of impurity related deep intermediate bands suggest applications of the materials in opto-electronic and spintronics devices.

Date palm trees are abundant and cheap natural resources in Saudi Arabia. In this study, an activated carbon was prepared from palm trunks by chemical processes. The chemical activation was performed by impregnation of the raw materials after grinding with H3PO4 solution (63%), followed by placing of the sample solution on a muffle furnace at 400 ºC for 30 min, and then at 800 ºC for 10 min. The morphology of the fabricated material was checked using scanning electron microscopy that showed the rough surfaces on the carbon samples. The use of fabricated activated carbon for removal of eosin dye from aqueous solutions at different contact time, initial dye concentration, pH and adsorbent doses was investigated. The experimental results show that the adsorption process attains equilibrium within 20 min. The adsorption isotherm equilibrium was studied by means of the Langmuir and Freundlich isotherms, and it was found that the data fit the Langmuir isotherm equation with maximum monolayer adsorption capacity of 126.58 mg g-1. The results indicated that the home made activated carbon prepared from palm trunks has the ability to remove eosin dye from aqueous solution and it will be a promising adsorbent for the removal of harmful dyes from waste water.

Eosin B dye is usually used for staining in biology; the stain is harmful if swallowed, smelt, or absorbed through skin. Some researchers have tried to remove it by adsorption, but few have attempted for a complete degradation. In this study, cobalt doped iron oxide (Co-Fe2O3) powders were used to decompose eosin B in a solution. The nanoparticles of Co-Fe2O3 were successfully prepared using microwave-hydrothermal process and characterized using different techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive analysis of X-ray spectroscopy (EDAX), and X ray diffraction analysis (XRD). The images obtained from SEM and TEM analysis revealed that grain size is homogeneous and agglomeration with average size range of about 36.97 nm. A new peak was found in EDAX analysis, which confirmed the presence of Co atom with atomic percentage dopant of nearly 5.73%. The crystal size was 50 nm, calculated by XRD analysis data. The photocatalytic activity was evaluated by the degradation of eosin B under microwave, photocatalytic, soncatalytic, and sonophotocatalytic reactions. The degradation percentages were 78, 82, 83 and 87%, respectively. Thus, sonophotolysis was the optimum method to decompose the dye in solution by this method. In addition, the effects of the pH of solution were obviously examined, and it was found that low pH Original Research Article Sharfalddin et al.; ACSJ, 13(3): 1-13, 2016; Article no.ACSJ.23648 2 was a suitable pH for degradation eosin B. The photocatalyst could be reused three times without remarkable loss of its activity.

Fast Green (FCF) dye is commonly used in both cytology and histology applications. Previous studies have found that it can cause mutagenic and tumorigenic effects in experimental human and animal populations. It can also be a source of skin, eye, respiratory, and digestive irritation. The purpose of this study was to examine the use of thin film membranes to degrade FCF. A thin film membrane of chitosan (CS) was fabricated and subsequently filled with zinc oxide nanoparticles (ZnO) or ZnO/CuO-heterostructured nanocomposites. The CS membrane was used as a matrix, and the nanomaterials were used as photocatalysts. The prepared membranes were characterised by four analytical techniques: atomic force microscopy, scanning electron microscopy, X-ray diffraction, and energy-dispersive X-ray analyses. The photocatalytic activity of the fabricated membranes was evaluated by performing experiments in which aqueous solutions of FCF dye that contained the fabricated membrane were irradiated with solar light or UV light. The photodegradation percentage was spectrophotometrically determined by monitoring the maximum wavelengths (λmax) of FCF at 623 nm for different irradiation times. The decolourisation percentages of the dye under solar light were 57.90% and 60.23% using the CS-ZnO and CS-ZnO/CuO membranes, respectively. When UV light irradiation was employed as the source of irradiation, the photodegradation percentages of FCF were 71.45% and 91.21% using the CS-ZnO and CS-ZnO/CuO membranes, respectively. These results indicated that the best photocatalytic system for the degradation of FCF dye was CS-ZnO/CuO membrane in combination with UV light irradiation. The study also found that it was easy to separate the prepared membranes after the reaction without the need for a centrifuge or magnet. The results demonstrate the potential for CS-ZnO and CS-ZnO/CuO membranes for use as effective sorbents during the process of photodegradation of harmful dyes within waste water recycling practices.

The use of nanoparticles in sensing is attracting the interest of many researchers. The aim of this work was to fabricate Acacia gum–stabilised silver nanoparticles (SNPs) using green chemistry to use them as a highly sensitive and cost-effective localised surface plasmon resonance (LSPR) colorimeter sensor for the determination of reactive oxygen species, such as hydrogen peroxide (H2O2). Silver nanoparticles were fabricated by the reduction of an inorganic precursor silver nitrate solution (AgNO3) using white sugar as the reducing reagent and Acacia gum as the stabilising reagent and a sonication bath to form uniform silver nanoparticles. The fabricated nanoparticles were characterised by visual observation, ultraviolet-visible (UV-Vis) spectrophotometry, transmission electron microscopy (TEM) analysis, energy-dispersive X-ray spectroscopy (EDAX), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FT-IR). The TEM micrographs of the synthesised nanoparticles showed the presence of spherical nanoparticles with sizes of approximately 10 nm. The EDAX spectrum result confirmed the presence of silver (58%), carbon (30%), and oxygen (12%). Plasmon colorimetric sensing of H2O2 solution was investigated by introducing H2O2 solution into Acacia gum–capped SNP dispersion, and the change in the LSPR band in the UV-Vis region of spectra was monitored. In this study, it was found that the yellow colour of Acacia gum–stabilised SNPs gradually changed to transparent, and moreover, a remarkable change in the LSPR absorbance strength was observed. The calibration curve was linear over 0.1–0.00001 M H2O2, with a correlation estimation ( R2) of .953. This was due to the aggregation of SNPs following introduction of the H2O2 solution. Furthermore, the fabricated SNPs were successfully used to detect H2O2 solution in a liquid milk sample, thereby demonstrating the ability of the fabricated SNPs to detect H2O2 solution in liquid milk samples. This work showed that Acacia gum–stabilised SNPs may have the potential as a colour indicator in medical and environmental applications.