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Preventing and controlling agricultural non-point-source pollution, advancing the agricultural industry, and facilitating cation–π interaction to address cation instability and fertilizer loss are crucial for advancing agricultural sustainability. Due to the unique π-bond characteristics of GO (graphene oxide), it was selected as a cation carrier to improve fertilizer anti-loss capabilities and facilitate the effective release of nutrient ions. By adjusting the interface properties of GO, RGO (rippled graphene oxide) and CGO (crumpled graphene oxide) were successfully prepared, and their interactions with cations and the impact on sustained-release performance were studied. The selected optimal kinetic model provides a theoretical basis for material design. The results indicate that RGO-Zn1 (Zn2+/RGO = 16.7%) can not only effectively control agricultural non-point source pollution but also promote the cultivation of high-zinc rice. This study not only proposes an innovative solution for soil improvement and agricultural transformation and upgrading but also offers fundamental scientific insights into the cation-π interaction mechanism during transmembrane permeation. [ABSTRACT FROM AUTHOR]

Ag-loaded zeolite is a promising antibacterial material. However, the limited Ag loading limits the improvement of antibacterial performance. How to increase the Ag loading amount is an urgent issue. Herein, Ag-loaded Zn-hybrid NaA zeolite with high Ag loading of (43.26 ± 0.48)% was prepared by using Zn-hybrid NaA zeolite as carrier via solid phase ionic exchange method. The carrier of Zn-hybrid NaA zeolite was prepared by a single-mode microwave method with sodium silicate, sodium metaaluminate, and zinc nitrate as raw materials. The physicochemical property was systematically characterized by XRD, XRF, XPS, FT-IR, and SEM. The results showed that Zn species entered the NaA zeolite framework in the Zn-hybrid NaA zeolite, instead of the simple ion exchange. In addition, the synthetic mechanism of Ag-loaded Zn-hybrid NaA zeolite was discussed in detail. The antibacterial activity, sustained-release performance, anti-tarnish property were investigated. What's more, the antibacterial mechanism was proposed based on the experimental result. [ABSTRACT FROM AUTHOR]

Ag-loaded antibacterial zeolite materials were prepared by a solid phase ionic exchange approach with small NaA zeolite crystals synthesized by sol-gel method as carrier, NH4NO3 and AgNO3 as raw materials. The influence of AgNO3 amount, reaction temperature, and reaction time on silver load in the zeolite was investigated. The phase composition and morphology of the Ag-loaded zeolite were also characterized. In addition, the antibacterial activity, sustained-release performance, and anti-tarnish property of the Ag-loaded zeolite were studied. The results show that the Ag-loaded zeolite was synthesized under optimum conditions. The amount of silver load in the zeolite was up to 23.45% (mass ratio). The minimum inhibitory concentration value (MIC value) was 9.17 ppm, and the diameter of inhibition zone for Escherichia coli was 16.3 mm. The MIC value was 12.50 ppm, and the diameter of inhibition zone for Staphylococcus aureus was 14.5 mm. Furthermore, the Ag-loaded zeolite materials demonstrate good sustained-release performance and anti-tarnish property. [ABSTRACT FROM AUTHOR]

Novel amphiphilic polysaccharide-based material carboxymethyl cellulose derivative (CMCD) was prepared by esterification of carboxymethyl cellulose sodium (CMC-Na) and tocopherol succinate via ionic liquid activation. The FTIR, 1H NMR, X-ray diffraction (XRD) and thermogravimetry (TG) were used to characterize the molecular structure and thermal properties. The tebuconazole nanocapsules were prepared using ultrasound/rotary evaporation. The particle sizes and morphologies of the nanocapsules were determined by dynamic light scattering (DLS) and transmission electron microscopy (TEM). The entrapment efficiency, loading rate and sustained-release performance of tebufonzol were detected by HPLC, and the fungicidal activity was also investigated using the medium method. The results showed that the amphiphilic carboxymethyl cellulose derivative (CMCD) was successfully synthesized with the critical micelle concentration (CAC) of 0.28 mg/mL. The particle size of the tebuconazole nanocapsules was 400-500 nm, the encapsulation efficiency was 50.8%, and the drug loading was 40.4%. The sustained-release test showed that, after 48 hours, the final cumulative release rate of tebuconazole-loaded CCMD nanocapsules was 77.78%. The bioassay results showed that the inhibition rate of the tebuconazole-loaded CMCD nanocapsules against Botryosphaeria dothidea still reached 17.67% after 12 days. At this time, the inhibition rate of the traditional tebuconazole 430 g/L SC was almost 0. The research indicated that the novel amphiphilic polysaccharide-based tebuconazole nanocapsules prepared in this work have good sustained-release performance and fungicidal activity [ABSTRACT FROM AUTHOR]

Nano-sized calcium carbonate (nano-CC) was studied in terms of acting as a carrier for a pesticide. Nano-CC was prepared by reaction of calcium chloride and sodium carbonate by the reversed-phase microemulsion method and then loaded with the pesticide validamycin. The resulting material was characterized by X-ray diffraction analysis and scanning electron microscopy. The loading efficiency, sustained-release performance, germicidal efficacy, and stability also were investigated. The size of the loaded nano-CC can be adjusted to between 50 to 200 nm by varying the water/surfactant molar ratio from 30/1 to 10/1, and the loading efficiency can be increased to about 20% by increasing the size of the nano-CC. The material displayed better germicidal efficacy against Rhizoctonia solani compared to conventional technical validamycin after about 7 days, and the time of the release of validamycin was extended to 2 weeks. Given the loading efficiency, stability, sustained-release performance and good environmental compatibility of the material, the method for its preparation may be extended to other hydrophilic pesticide. [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]