The Doping Of Semiconductor By Rare Earth Metal Nanoparticle

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The doping of semiconductor by rare earth metal nanoparticle is an effective way for increasing photocatalytic activity. Zinc oxide and Lanthanum doped Zinc oxide nanoparticles were synthesized by modifying the gel-combustion method. It was found that La can greatly enhance the cytotoxicity and photocatalytic activity of ZnO nanoparticles towards various cell lines and paracetamol drug. These nanoparticles were characterized by various spectroscopic and other techniques which clearly revealed the presence of lanthanum ions. The absorption edge shifts towards the visible region after doping with La ions. This shift shows that the doping of La ions is favorable for absorbing the visible light. The comparative photocatalytic and cytotoxicity activity revealed that La doped ZnO nanoparticles remarkably enhanced activities as compared to the ZnO nanoparticles. The outcome of these studies offers valuable for planning La doped ZnO nanoparticles having cytotoxicity and photocatalytic activities helpful for the formulation of anticancer product and wastewater remediation.
Keywords. Gel-combustion, Photocatalytic, Paracetamol, Cell lines and nanoparticles.

1. Introduction.
The presence of pharmaceutical compound even at low concentration in waste water effluents raised the environmental problems on aquatic and human life in recent years [1]. Several drugs are extensively used as antibiotics, antiseptics, anti-inflammatory and disinfectants [2]. Out of which Paracetamol

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