GREEN SYNTHESIS AND CHARCTERIZATION OF ZnO NANOPARTICLES FROM LEAFS EXTRACTS OF ROSA INDICA AND ITS ANTIBACTERIAL ACTIVITY

Abstract

The present study was carried out to the green synthesis of ZnO nanoparticles and investigation of its antibacterial activity. Rosa indica leaves is of considerable interest and is a well-known compound because of its show antioxidant, antidiabetic, anti-inflammatory, antimicrobial activities etc . In the present study focuses on the Green synthesis of ZnO nanoparticles by sodium hydroxide, Zinc acetate and biocomponents of leaves of Rosa indica in the reaction mixture was observed in the precipitate from, which proved the formation of ZnO nanoparticles. Further, the green synthesized ZnO nanoparticles were characterized UV-Vis spectrophotometer, XRD analysis, FTIR, DLS, SEM with EDX. this all analysis shows the confirm the nanoparticles .the ZnO nanoparticles show particles size 10nm through DLS analysis. Antibacterial activity of the ZnO nanoparticles was evaluated by testing against Gram-negative(E.coli) and Gram-positive (S.aureus) bacteria. The antibacterial activity of the Synthesized ZnO nanoparticles was found to be more effective against Gram-positive bacteria (S.aureus).

Synthesis, Characterisation and Catalytic Studies of Nano Zinc Oxide-Alumina for Displacement Reaction on Carbonyldiimidazole

“…Fig.-2: XRD Spectrum of ZnO-Al 2 O 3 UV-DRS spectrum of ZnO-Al 2 O 3 NP in Fig.-3 reveals the absorbance peak in the range of 350 -380 nm corresponding to the characteristic band of ZnO NP42 . This is also in accordance with the reports available in the literature on the UV spectral characteristics of ZnO NP [43][44][45]. …”

“…This is also in accordance with the reports available in the literature on the UV spectral characteristics of ZnO NP. [43][44][45] Fig. Whereas aluminium doped ZnO NP has been reported to exhibit a blue shift in the UV absorption attributed to the direct transition of electrons in the ZnO nanocrystals.…”

Comparison of Ecotoxicity of Nickel and Iron Oxides and Their Nanoforms

“…Bacteria of the genus Azotobacter were more significantly affected by high concentrations (10,000 mg/kg) of nanoparticles of iron (66% of the control) and nickel oxides (75% of the control) than ordinary iron (81% of the control) and nickel oxides (78% of the control). The high toxicity of nanoparticles with respect to bacteria was recorded by researchers for other metals as well [21][22][23][24][25][26][27] .…”

“…Numerous researches are devoted to estimation of nanoparticle environmental impact. The influence of nanopowders on animals [3][4][5][6][7] , plants [8][9][10][11][12][13][14][15][16] , bacteria [17][18][19][20][21][22][23][24][25] , ferment activity [26][27][28][29] has been studied. The environmental impact of nanopowders, including the impact on soil, should be studied in more details due to the inconsistency of estimations: some authors evidence safety of environmental pollution with nanoparticles, and the others point to significant risks.…”

MICROWAVE ASSISTED SYNTHESIS, CHARACTERIZATION AND PHOTO-CATALYTIC STUDY OF Cu/ZnO NANOCOMPOSITE

“…13,14 Zinc oxide (ZnO) nanostructures, on the other hand, are considered as an alternative for TiO2,though both the semiconductors have similar band gap and antibacterial property. 15,16 ZnO nanostructures could be more suitable for photocatalytic applications due to its high catalytic activity, availability, and non-toxicity. These semiconducting metal oxides have a wide band gap, hence they show photocatalyic activity mainly in UV region.…”