Graphene modified Nd/TiO2 photocatalyst for methyl orange degradation under visible light irradiation

被引：65

作者：

Khalid, N. R. ^{[1
,2
,3
]}

Ahmed, E. ^{[3
]}

Hong, Zhanglian ^{[1
,2
]}

Zhang, Yuewei ^{[1
,2
]}

Ullah, Mahtab ^{[3
]}

Ahmed, M. ^{[1
,2
,3
]}

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

[3] Bahauddin Zakariya Univ, Dept Phys, Multan 60800, Pakistan

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 04期

基金：

中国博士后科学基金;

关键词：

Sol-gel processes; Nanocomposites; Optical properties; TiO2; TIO2; PHOTODEGRADATION; REDUCTION; SHEETS;

D O I：

10.1016/j.ceramint.2012.10.183

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel nanoscale GR-Nd/TiO2 composite photocatalyst was synthesized by the hydrothermal method. Its crystal structure, surface morphology, chemical composition and optical properties were studied using XRD, TEM, and XPS, DRS and PL spectroscopy. It was found that graphene and neodymium modification shifts the absorption edge of TiO2 to visible-light region. The results of photoluminescence (PL) emission spectra show that GR-Nd/TiO2 composites possess better charge separation capability than do Nd/TiO2 and pure TiO2. The photocatalytic activity of prepared samples was investigated by degradation of methyl orange (MO) dye under visible light irradiation. The results show that the GR-Nd/TiO2 composite can effectively photodegrade MO, showing an impressive photocatalytic activity enhancement over that of pure TiO2. The enhanced photocatalytic activity of the composite catalyst might be attributed to the large adsorptivity of dyes, extended light absorption range and efficient charge separation due to Nd doping and graphene incorporation. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：3569 / 3575

页数：7

共 34 条

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