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Dr. Dhrubo Jyoti Sen
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Abstract

PREPARATION OF NICKEL OXIDE NANOPARTICLES BY THERMAL DECOMPOSITION OF Ni (2- MERCAPTOBENZOTHIAZOLE)2 COMPLEX AS SINGLE SOURCE PRECUSOR AND ITS APPLICATION IN DEGRADATION OF ORGANIC NITRO COMPOUND

Ajay V. Gole, *Hetal J. Mehta and Akshit H. Nor

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Abstract

Nickel oxide nanoparticles are very important materials due to its various applications in preparation of smart windows and piezoelectric devices, as p-type semiconductors with wide band gap 3.6-4.0 eV, in fuel cells and supercapacitor coatings for the passivation of surfaces against corrosion, as catalysts and magnetic materials and as sensors. The tuning of morphology is the current research interest, therefore the ability to synthesize nanoparticles with precisely controlled size, composition and shape is the task. Thermal decomposition of Ni(2- Mercaptobenzothiazole)2 in horizontal furnace is one of simplest way to prepare nanoparticles. Nickel-2-mercaptobenzothiazole complex was synthesized by the reaction between nickel chloride hexahydrate and 2-mercaptobenzothiazole in methanol. As prepared complex was characterized using UV, IR Spectroscopy. It was found that the stoichiometry of metal and ligand is in the ratio of 1:2 that is [NiL2]. Nickel oxide nanoparticles were prepared by thermal decomposition in horizontal furnace at 400, 450 and 500oC. Further nanoparticles were characterized by powder X-ray diffraction(XRD) and transmission electron microscopy(TEM). The formation of phase pure cubic NiO (JCPDS: 78-0643) was evident from the powder XRD patterns. TEM shows spherical morphology from particle size ranging from 4-40 nm. Nitrobenzene is primarily used as a precursor for aniline.[1a,b,c,d.e] It is also used as an organic solvent and a fragrance for cheap soaps. It is responsible for cancer in human being and animals, also it binds to protein of haemoglobin which leads to Methaemoglobinaemia. NiO nanoparticles are best candidate for photocatalytic degradation of nitrobenzene as it is wideband gap semiconductor.

Keywords: Nickel oxide, chalcogenato complex, 2-mercaptobenzothiazole, nanoparticles, nitrobenzene, pyrolysis.


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