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In the present study, green synthesis of silver nanoparticles (Ag NPs) was synthesized from silver ions using the reducing agents of Catharanthus roseus flowers extract. This flower was extract and fractionated by non-polar to polar solvent using separating funnel. The distilled water fraction was analyses the primary phytochemical test and used the synthesis of NPs. The UV-vis spectra wavelength value at 447 nm was confirmed the product of Ag NPs. FTIR spectrum wavenumbers at 3401 and 1625 cm−1 has indicates the hydroxyl and carbonyl groups, respectively, capping the Ag NPs. HRTEM images of Ag NPs shows the spherical shape with sizes 5–20 nm. This NPs has excellent photocatalyst in the reduction of methyl orange and 4-nitrophenol (4-NP) in the presence of NaBH4. These NPs has potential antioxidant activity of DPPH, and H2O2 assays against the standard ascorbic acid contain the 100 µg/ml of NPs shows 65% and 77% of inhibition activity.

Organic dyes are mostly used in textile, paper, cosmetic, pharmaceutical industries etc., as colouring agents and being disposed in the environment that makes serious health issues. Therefore, this...

In this present study, green synthesis of silver nanoparticles (AgNPs) was synthesized from silver nitrate using the reducing agents of Polyalthia longifolia bark extract and applied the catalyst in the reduction/degradation of environmental polluted organic compound in the presence of NaBH4. Initially, the colourless reaction mixture was slowly changed to yellowish brown, UV-visible spectroscopy of surface plasmon resonance centre at 447 nm confirmed the formation of AgNPs. High resolution transmission electron microscopy (HRTEM) clearly identified the spherical shapes nanoparticles with diameters sizes 5-25 nm. This AgNPs has excellent catalyst in the catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) as compared to the reducing agent of NaBH4 (chemical) and plant extract (natural).

Cassia auriculata L., the flower aqueous extract was fractionated by separating funnel using n-hexane (A1), chloroform (A2), ethyl acetate (A3) and triple distilled water (A4). The A4 fraction was concentrated and determined the presence of preliminary phytochemicals such as tannins, flavonoids, glycosides, carbohydrates and polyphenolic compounds. These phytochemical compounds acted as reducing as well as a stabilizing agent in the green synthesis of Ag NPs from aqueous silver ions. Initially, the colour change and UV-vis absorbance surface Plasmon resonance strong, wide band located at 435nm has confirmed the synthesis of Ag NPs. The X-ray diffraction (XRD) pattern of Ag NPs shows a face-centered cubic crystal structure. The observed values were calculated by Debye-Scherrer equation to theoretical confirms the particle size of 18nm. The surface morphology of Ag NPs was viewed by HRTEM, the particles are spherical and triangle shapes with sizes from 10 to 35nm. Further, the Ag NPs was effective catalytic activity in the reduction of highly environmental polluted organic compounds of 4-nitrophenol and methyl orange. The green synthesis of Ag NPs seems to eco-friendly, cost-effective, conventional one spot synthesis and greater performance of catalytic degradation of environmentally polluted organic dyes.

A simple phyto-assisted synthesis of zinc oxide nanowires (ZnO NWs) employing urinary tract infection (UTI) controlling traditional medicinal plant Pedalium murex L. mucilage, their silver (Ag) doping by co-precipitation method has been reported. The synthesized Ag-doped ZnO NWs photocatalytic action on the UTI antibiotic nitrofurantoin (NFT) and the dye methylene blue (MB) has been reported. The synthesized NPs optical, biocomponents, structural and chemical properties were determined by UV-vis spectroscopy, FTIR, XRD, SEM, TEM, EDAX, particle size analyzer. Photocatalytic activity of the phyto-assisted synthetic Ag-doped ZnO NWs was investigated on the degradation of the antibiotic NFT and the dye MB. The percentage of degradation, as well as dye removal efficiency was calculated. The UV-vis absorption spectrum showed a surface plasmon resonance (SPR) band at 370 nm - 400 nm with blue and redshift. The vast bandgap energy (3.37 eV - 2.75 eV) reduction indicated the inclination of noble metal Ag on the surface of ZnO NWs. XRD diffractogram revealed the crystalline hexagonal wurtzite structure and c-axis oriented growth of the synthesized ZnO nanowires. FTIR spectra functional groups exposed the possible contribution of plant phytochemicals in the formation of nanowires. TEM micrographs showed the agglomerations of zinc cite crystal structure nanowire with silver inclination on their surface. EDX and SAED confirmed the elemental composition and purity of the synthesized Ag/ZnO nanowires. The synthesized Ag-doped ZnO nanowires achieved photocatalytic degradation of about 78.51% of the antibiotic NFT and 92.43% of MB dye in 150 min under UV irradiation. The present study establishes the likelihood of photocatalytic degenerative potency of the antibiotic nitrofurantoin and methylene blue employing photosynthesized phytosynthesized zinc oxide nanowires.