Photodegradation of 2,4-D over PdO/Al2O3-Nd2O3 photocatalysts prepared by the sol-gel method

被引：20

作者：

Barrera, A. ^{[1
]}

Tzompantzi, F. ^{[2
]}

Lara, V. ^{[2
]}

Gomez, R. ^{[2
]}

机构：

[1] Univ Guadalajara, Ctr Univ Cienega, Ocotlan Jal, Mexico

[2] Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2012年 / 227卷 / 01期

关键词：

Photodegradation; 2,4-D herbicide; PdO/Al2O3-Nd2O3; sol-gel; N-2; physisorption; XRD; UV-vis; FTIR; 2,4-DICHLOROPHENOXYACETIC ACID; DEGRADATION; TIO2; PHENOL; WATER;

D O I：

10.1016/j.jphotochem.2011.10.023

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photocatalytic activity of 1.0 wt% PdO supported on Al2O3-Nd2O3 binary oxides prepared by the sol-gel method was studied in the photodegradation of 2,4-dichlorophenoxyacetic acid (2,4-D). The photocatalysts were characterized by N-2 physisorption, XRD and UV-vis spectroscopy. MO supported on gamma-Al2O3 photo-degrades the 2,4-D, however the addition of Nd2O3 to gamma-Al2O3 notably improves the photocatalytic activity. As the concentration of Nd2O3 in the binary oxide increases from 2 to 10 wt%, the photodegradation of 2,4-D is highly enhanced. The catalytic test for PdO supported on pure Nd2O3 showed scarce photocatalytic activity. Total organic carbon (TOC) analysis showed that the 2,4-D has been completely destroyed on the PdO/Al2O3-Nd2O3 photocatalysts after 6 h under irradiation. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：45 / 50

页数：6

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