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Phytosynthesis plays a crucial role for synthesizing nickel oxide nanoparticles (NiO NPs) in a harmless, non-toxic and cost-effective way using Zephyranthes rosea (Z. rosea) flower extract as reducing agent. The cyclic voltammetry (CV) study shows the excelled enhanced specific capacitance of 548.25 F g–1 at 10 mV s–1. Trasatti and Dunn's methods demonstrates the charge storage mechanisms with total, outer and inner capacitances of 2207.50, 48.08 and 2159.41 F g–1, respectively. Galvanostatic charge–discharge profile makes evident of prolonged discharge time by providing the high specific capacitance of 1095.75 F g–1 at 0.5 A g–1. The fabricated electrode delivers outstanding capacitance retention of 96.1% for 2000 cycles. [ABSTRACT FROM AUTHOR]

• 2D Bismuthene nanosheets was synthesized by standard liquid phase exfoliation technique. • Bismuthene nanosheets deliver the maximum specific capacitance of 350 mAh/g at 10 mV/s. • The fabricated bismuthene//AC asymmetric supercapacitor delivers the superior energy density of 27.23 Wh/kg and their respective power density of 312.5 W/kg. • The fabricated asymmetric supercapacitor delivers superior capacitive retention of 89.2% and coulombic efficiency of 102% for 3000 charge discharge cycles. Two dimensional (2D) materials with unique quantum chemistry, tunable interlayer bandgap, and active functional groups extensively enhance the electrochemical behavior in electrochemical energy storage devices. Herein, we synthesize the bismuthene nanosheets from bulk metallic bismuth powder using the standard liquid phase exfoliation technique. As a result, the X-ray diffraction (XRD) spectrum reveals the rhombohedral crystal structure of the bismuthene nanosheets and their active functional groups have been identified by Fourier transform infrared (FTIR) analysis. Likewise, the high resolution transmission electron (HR-TEM) microscopy reveals the morphology and surface nature of the 2D bismuthene nanosheets with high transparency with the interplanar lattice spacing of 0.328 nm. Moreover, the atomic force microscopy (AFM) shows the stacking of 11–12 layer nanosheets with an average sheet thickness of about 4.7 nm. Cyclic Voltammetry (CV) analysis of the delaminated bismuthene nanosheets provides the gravimetric capacity of 350 mAh/g at 10 mV/s. Furthermore, Trasatti and Dunn's approach demonstrates the charge storage process and the obtained total, outer, and inner capacity of bismuthene nanosheets are 724.6, 34.7, and 689.6 mAh/g respectively with the capacitive and diffusive contributions are 95.2% and 4.8% correspondingly. Moreover, the asymmetric supercapacitor (ASC) based on bismuthene and activated carbon (AC) delivers the maximum specific capacity of 87.3 mAh/g at 1 A/g, together with the energy density of 27.23 Wh/kg corresponding to the power density of 312.5 W/kg. [Display omitted] [ABSTRACT FROM AUTHOR]

[Display omitted] • Lanthanum oxide nanoparticles were synthesized by greener method using Moringa Oleifera leaves extract as a reducing agent. • La 2 O 3 NPs has the particle size ranges from 50 to 80 nm and it has cubic morphology. • La 2 O 3 NPs shows potent BSA denaturation activity. • Optical bandgap energy of La 2 O 3 NPs was 4.31 eV. Phytosynthesis is a reliable way to produce metal nanoparticles without affecting the environment. Plant extracts act as reducing agent and favors nanoparticle synthesis. Recently, potential drugs were developed in nanotechnology platforms by the green synthesis approach. In this study, the leaves extract of 'Moringa Oleifera' (M. oleifera) used as a reducing agent for the synthesis of Lanthanum oxide nanoparticles (La 2 O 3 NPs). The X-ray diffraction (XRD) confirmed the formation of body-centered cubic structure of La 2 O 3 NPs. The optical behavior of La 2 O 3 NPs was analyzed by UV–Vis spectrum. The bandgap energy of the La 2 O 3 NPs was found to be 4.31 eV using Tauc's plot. The morphology and purity of La 2 O 3 NPs was analyzed by using Field Emission Scanning Electron Microscope (FESEM) and Energy Dispersive X-ray (EDX) spectrum. High Resolution Transmission Electron Microscope (HR-TEM) analysis reveals the morphology, lattice spacing, and selected area electron diffraction (SAED) pattern of the La 2 O 3 NPs. The XPS analysis of the La 2 O 3 NPs reveals the binding energy of La (3d 5/2 and 3d 3/2) and O 1s at 835.5, 852.3, and 536 eV respectively. The total antioxidant activity (TOA) of La 2 O 3 NPs was found to be 75.32% at 500 µg/mL with the standard drug of vitamin C. The anti-inflammatory activity of the La 2 O 3 NPs was found to be 94.15% at 500 µg/mL using the bovine serum albumin denaturation (BSA) technique. The inhibitory activity of La 2 O 3 NPs against α-amylase was found to be 79.99% at 500 µg/mL. In summary, the pure, highly stable and good biocompatible, greener approach based M. oleifera assisted La 2 O 3 was synthesized for radical scavenging, α-amylase and BSA denaturation inhibition activities which can play a key role in the future biomedical and nano-biotechnological applications. [ABSTRACT FROM AUTHOR]

• Lanthanum Oxide nanoparticles were synthesized by greener method using Eucalyptus globulus leaf extracts. • La 2 O 3 NPs has the average particle size of 50.37 nm and interplanar lattice spacing values of 0.355 nm. • EDS spectrum confirms the high purity nature of La 2 O 3 NPs. • Anti-inflammatory, antioxidant and antidiabetic activity has the potential inhibition compared with standard drugs. The development of nanoparticles (NPs) for biomedical and pharmaceutical applications is in high demand in the field of science and technology, due to their potential inhibition against pathogens. The eco-friendly green methodology is used for the synthesis of lanthanum oxide (La 2 O 3) Nps using Eucalyptus globulus (E. globulus) leaf extracts. X-ray diffraction analysis (XRD) and selected area electron diffraction (SAED) studies reveal the formation of hexagonal structured La 2 O 3 NPs. The vibrational modes of La 2 O 3 were analyzed using Fourier transform infrared (FTIR) analysis. The Ultraviolet–visible (UV–Vis) analysis revealed the optical absorption of La 2 O 3 with a cutoff wavelength of 290 nm. The particle distribution and surface nature were confirmed by scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HR-TEM) analysis with an average particle size of 50.37 nm. The main aim of this study is to control various inflammations and diabetic diseases using La 2 O 3 as a potential inhibiting drug. [ABSTRACT FROM AUTHOR]