Phthalic acid modified TiO2 and enhanced photocatalytic reduction activity for Cr(VI) in aqueous solution

被引：28
作者：
Liu, Hailong [1 ,2 ]
Zhou, Yan [2 ]
Huang, Heyong [2 ]
Feng, Yuying [1 ,2 ]
机构：
[1] Nanjing Normal Univ, Key Lab Biofunct Mat Jiangsu Prov, Nanjing 210097, Peoples R China
[2] Nanjing Normal Univ, Dept Chem & Environm Sci, Anal & Testing Ctr, Nanjing 210097, Peoples R China
来源：
DESALINATION | 2011年 / 278卷 / 1-3期
关键词：
TiO2; Phthalic acid; Cr(VI); Photocatalytic reduction; Electron-hole pairs; VISIBLE-LIGHT; SURFACE MODIFICATION; HEXAVALENT CHROMIUM; AZO-DYE; NANOPARTICLES; SEMICONDUCTORS; DEGRADATION; PARTICLES; CARBON; IONS;
D O I：
10.1016/j.desal.2011.05.037
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The photocatalytic reduction of Cr(VI) on TiO2 nanoparticle modified with phthalic acid, which was prepared through a chemisorption method, has been investigated under ultraviolet light irradiation. This study found that the adsorption of phthalic acid onto the surface of TiO2 nanoparticle resulted in the formation of a surface-modified complex. The interaction of TiO2 with phthalic acid was characterized by various spectroscopic methods including diffuse reflectance UV-vis, infrared, fluorescence spectra, and X-ray diffraction (XRD). The results indicated that the recombination of charge carriers was effectively suppressed due to the modification of phthalic acid on the surface of TiO2. In addition, the modified TiO2 resulted in enhanced photocatalytic reduction activity for Cr(VI), which might be attributed to the effective separation of electron-hole pairs. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：434 / 437
页数：4
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