Photocatalytic degradation of 2,4-dichlorophenoxiacetic acid and 2,4,6-trichlorophenol with ZrO2 and Mn/ZrO2 sol-gel materials期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Photocatalytic degradation of 2,4-dichlorophenoxiacetic acid and 2,4,6-trichlorophenol with ZrO2 and Mn/ZrO2 sol-gel materials

Authors:	T. López M. Alvarez F. Tzompantzi M. Picquart

Affiliation:	(1) Department of Chemistry, Universidad Autónoma Metropolitana-Iztapalapa, P. O. Box 44-534, México, D. F., 09340;(2) Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas 152, México, 07000, D.F., México;(3) Department of Physics, Universidad Autónoma Metropolitana-Iztapalapa, P. O. Box 44-534, México, D. F., 09340

Abstract:	Because of its semiconductor properties, sol-gel zirconia can be used as a photocatalyst. When zirconia is doped with transition metals, its electronic properties are modified. In this work, sol-gel Mn/ZrO₂ and ZrO₂ materials were tested for photocatalytic degradation of 2,4-dichlorophenoxiacetic acid and 2,4,6-trichlorophenol. The powders were characterized by XRD, UV-Vis and Raman spectroscopy. The apparent rate constants were calculated assuming pseudo-first order kinetics. The results reveal that ZrO₂ is effective as a photocatalyst; moreover, its photocatalytic properties improve when it is doped with manganese.

Keywords:	Manganese-zirconia sol-gel Photocatalysis Photocatalytic degradation 2,4-dichlorophenoxiacetic acid 2,4,6-trichlorophenol
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