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Catalytic Degradation of Dichlorvos Using Biosynthesized Zero Valent Iron Nanoparticles

纳米颗粒 傅里叶变换红外光谱 敌敌畏 材料科学 催化作用 纳米材料 水溶液 透射电子显微镜 化学工程 核化学 纳米技术 化学 有机化学 生物 工程类 杀虫剂 农学
作者
Neha Mehrotra,Ravi Mani Tripathi,Fahmina Zafar,Manoj Singh
出处
期刊:IEEE Transactions on Nanobioscience [Institute of Electrical and Electronics Engineers]
卷期号:16 (4): 280-286 被引量:45
标识
DOI:10.1109/tnb.2017.2700232
摘要

The removal of dichlorvos contamination from water is a challenging task because of the presence of direct carbon to phosphorous covalent bond, which makes them resistant to chemical and thermal degradation. Although there have been reports in the literature for degradation of dichlorvos using nanomaterials, those are based on photocatalysis. In this paper, we report a simple and rapid method for catalytic degradation of dichlorvos using protein-capped zero valent iron nanoparticles (FeNPs). We have developed an unprecedented reliable, clean, nontoxic, eco-friendly, and cost-effective biological method for the synthesis of uniformly distributed FeNPs. Yeast extract was used as reducing and capping agent in the synthesis of FeNPs, and synthesized particles were characterized by the UV-visible spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). TEM micrographs reveal that the nanoparticles size is distributed in the range of 2-10 nm. Selected area electron diffraction pattern shows the polycrystalline rings of FeNPs. The mean size was found to be 5.006 nm from ImageJ. FTIR spectra depicted the presence of biomolecules, which participated in the synthesis and stabilization of nanoparticles. As synthesized, FeNPs were used for the catalytic degradation of dichlorvos in aqueous medium. The degradation activity of the FeNPs has been investigated by the means of incubation time effect, oxidant effect, and nanoparticle concentration effect. The ammonium molybdate test was used to confirm the release of phosphate ions during the interaction of dichlorvos with FeNPs.
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