Title: Effect of lanthanum-doped amount on photocatalytic activity of TiO2/bentonite in cyanide waste water

Authors: Yali Zhang; Qinglong Wang; Xiaogen Tian

Addresses: School of Chemical Engineering, Shandong University of Technology, Zibo, 255049, China ' School of Chemical Engineering, Shandong University of Technology, Zibo, 255049, China ' School of Chemical Engineering, Shandong University of Technology, Zibo, 255049, China

Abstract: The photocatalysts prepared by the primary materials of butyl titanate and bentonite, containing the dopant lanthanum in amounts from 0 to 3% (molar ratio of lanthanum to titanium) were used in a low concentration of cyanide waste water to detect the performance. They were characterised by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric apparatus (TG) and EDS analysis to obtain some properties. When the lan-doped amount was about 1%, the photocatalyst was more effective in photocatalytic degradation. The work indicated that the moderate lanthanum was effective in degrading cyanide waste water and the optimal amount was 1%.

Keywords: photocatalysts; lan-doped amount; cyanide wastewater; lanthanum doping; photocatalytic activity; TiO2; bentonite; wastewater treatment; titanium dioxide; titania; butyl titanate; photocatalytic degradation.

DOI: 10.1504/IJEE.2016.082305

International Journal of Environmental Engineering, 2016 Vol.8 No.2/3, pp.139 - 147

Received: 05 Jun 2015
Accepted: 09 Apr 2016

Published online: 14 Feb 2017 *

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