A facile phyto chemical extracellular synthesis of Palladium nanoparticles (Pd NPs) with the help of starting material Palladium acetate and easily available wild plant Catunaregum spinosa (C. Spinosa) were developed. The phyto chemicals present in the plant acts as secondary metabolites for Pd NPs formation. In most of the industries carcinogenic dyes are released into water bodies in an uncontrolled manner among this Congo red is also released; which said to be a toxic diazo dye. These effluents can play a prominent role in affecting the flora and fauna. In this perspective Pd NPs is synthesized by using C. spinosa root bark aqueous extract in an ecofriendly manner by using bottom-up approach. Further the Pd NPs was monitored by UV–Vis spec and characterized by FT-IR, XRD, TEM, EDAX, Zeta potential. Green synthesized Pd nanomaterials identified as agglomerated spherical shape particles and size average of 47 ± 2 nm by microscopical analysis. Further the synthesized Pd NPs were investigated against the homogenous catalytic degradation Congo red results in 83%. © 2016, Springer Science+Business Media New York.

Mohana Roopan S

Department of Chemistry

School of Advanced Sciences

Vellore Campus

Elango M

Mechanical

School of Mechanical Engineering

Chennai Campus

Haritha E

Madhavi G

Al-Dhabi N.A

Arasu M.V.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Journal of Cluster Science

Currently phytochemical approach for the synthesis of metal nanoparticles plays a major role. In this manuscript phytochemical synthesis of Ni-Pd bi-metallic nanoparticles (Ni-Pd NPs) were subjected for various biological applications like pesticidal, larvicidal and ovicidal activities. The synthesized Ni-Pd NPs were confirmed by various characterization techniques, The XRD pattern confirms the formation of Ni-Pd NPs in purest crystalline form and it matches with the Joint Committee Powder Diffraction Standard data of JCPDS: 65-5788. The crystalline sizes of bi-metallic nanoparticles were found to be 33 nm which is calculated from Scherrer equation. TEM images clear cuts the spherical particle of Pd NPs with over layered by Ni NPs. The TEM histogram analysis helps to find the average particle size of Ni-Pd NPs as 34 ± 2 nm. The EDAX spectrum also confirms the presence of palladium and nickel atom. Further the synthesized bi-metallic nanoparticles were subjected for larvicidal activity against Aedes aegypti (A. aegypti) which resulted in LC50 and LC90 of 288.88 ppm and 483.06 ppm respectively. Also in this manuscript phyto-synthesized Ni-Pd NPs were subjected to antifeedant activity against Callosobruchus maculatus (C. maculatus) and ovicidal activity against eggs of C. maculatus were performed. © 2016

Journal of Molecular Liquids

Coir mediated instant synthesis of Ni-Pd nanoparticles and its significance over larvicidal, pesticidal and ovicidal activities

There are variety of effluents are dumped or directly discarded into atmosphere due to drastic industrialization which leads to damages in living organisms. To prevent many type of environmental defects our research group focused to synthesis material which degrades toxic substance like dyes with the help of ecofriendly synthesis. We have synthesized Tin oxide nanoparticles (SnO2 NPs) using aqueous extract of Catunaregam spinosa (C. spinosa) root barks. Bio-inspired synthesized SnO2 NPs were monitored by analytical characterization which inferred that SnO2 NPs resulted in shape of spherical, with size average of 47 ± 2 nm. Further bio-green synthesized SnO2 NPs were subjected to degrade toxic Congo red dye, which results in higher percentage of degradation with the K value of 0.9212 which obeys pseudo-first order reaction kinetics. This report said to be novel due to null report on SnO2 NPs synthesized from C. spinosa root bark aqueous extract which also stated to be simplest, cheaper and non-toxic while compare to other methods. Further to identify the metabolites which is present in the aqueous extract were identified through Gas Chromatography and Mass Spectrometry with methanol as a solvent results that 7-hydroxy-6-methoxy-2H-1-benzopyran-2-one contains higher area percentage of 67.47 with the retention time (RT) of 18.660. © 2016 Elsevier B.V.

Journal of Photochemistry and Photobiology B: Biology

Green chemical approach towards the synthesis of SnO 2 NPs in argument with photocatalytic degradation of diazo dye and its kinetic studies

Biosynthetic methods are alternative approaches which are much safer than the normal techniques (physical and chemical) used for the methods for synthesis of metal nanoparticles. The benefits are sample as it is economic and environment friendly. Herein present investigation, we have reported a microwave mediated eco-friendly synthetic approach for preparing cerium oxide (CeO2) nanoparticles. Here, we used Moringa oleifera peel as the stabilizing and reducing agent towards synthesize of Ce2O NPs via microwave irradiation. The NPs were further characterized using UV-Vis, FT-IR, XRD and HR-TEM techniques. The FTIR analysis confirmed the phytochemical involvement in NPs stabilization. The crystallinity of CeO2 nanoparticles are well demonstrated through X-ray Diffraction and HR-TEM. The TEM images reveal the spherical shape of the CeO2 NPs having an average size of 45nm. Additionally, these CeO2 NPs were used successfully as a catalyst in the degradation of the dye, crystal violet. Also the antibacterial activity of the synthesized CeO2 NPs was evaluated using Staphylococcus aureus (Gram positive bacteria) and Escherichia coli (Gram negative bacteria). CeO2 NPs showed better activity on E. coli than S. aureus. We have demonstrated an eco-friendly preparation of CeO2 nanoparticles, a good photocatalyst and having better antibacterial properties.

Photocatalytic and antibacterial properties of phytosynthesized CeO2 NPs using Moringa oleifera peel extract

The physicochemical methods of the synthesis of zinc nanoparticles (ZnO NPs) and some detailed studies on ZnO toxicity mechanism and biokinetics have been reported. However, some of these physical and chemical methods of synthesis are expensive and can also have toxic substances absorbed onto them. Hence, eco-friendly synthesis of nanoparticles due to their easier process, cheaper availability, and high stability is dominating new research. In particular, ZnO NPs which are now being synthesized through major biological systems involved in this are bacteria, fungi, and plant extracts; this has increased studies in various applications in the biological field. In this review, we have elaborated on various natural source-mediated syntheses of ZnO NPs and their role in various biological activities like antimicrobial, anticandidal, larvicidal, cytotoxic, and photocatalytic activities. Apart from these applications, ZnO NPs are also reported to help to prevent dust formation, for several years, on oil paintings. © 2015, Springer-Verlag Berlin Heidelberg.

Applied Microbiology and Biotechnology

Biotechnological aspects of ZnO nanoparticles: overview on synthesis and its applications

Tin oxide (SnO2) nanoparticles were prepared using Persia Americana seed methanolic extract by calcining stannous chloride precursors at 300-500 °C by green synthesis method. Synthesized SnO2 NPs were confirmed via characterization techniques such as UV-visible spectroscopy (UV), X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and Energy Dispersive X-ray analysis (EDAX). The results of characterization technique states that the synthesized nanoparticles were in the size of 4 nm and further we have undergone catalytic degradation of organic dye named phenolsulfonphthalein (phenol red). The result showed that SnO2 NPs shows much degradation activity by the catalytic action of long UV exactly at 365 nm. © 2015 Elsevier B.V. All rights reserved.

Journal	Data powered by TypesetJournal of Cluster Science
Publisher	Data powered by TypesetSpringer Science and Business Media LLC
ISSN	1040-7278
Open Access	0