Degradation of benzene over a zinc germanate photocatalyst under ambient conditions

被引:127
作者
Huang, Jianhui [1 ]
Wang, Xinchen [1 ]
Hou, Yidong [1 ]
Chen, Xiufang [1 ]
Wu, Ling [1 ]
Fu, Xianzhi [1 ]
机构
[1] Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Breeding Base Photocatalysis, Fuzhou 350002, Peoples R China
基金
中国国家自然科学基金;
关键词
D O I
10.1021/es800744e
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A rod-shaped Zn2GeO4 photocatalyst has been successfully prepared by a surfactant-assisted hydrothermal method. The photocatalyst was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, UV/vis, N-2 adsorption-desorption, and FTIR techniques. The photocatalytic activity of the sample was evaluated by the decomposition of benzene in the gas phase under UV light illumination and was compared with that of bulk Zn2GeO4, commercial titania (Degussa P25), and Pt/P25. The results revealed that the Zn2GeO4 nanorods had the best photocatalytic activity for mineralizing benzene to CO2 among the catalysts examined. No obvious deactivation of Zn2GeO4 nanorods was observed during the prolonged operation of 140 h. It was found that the Zn2GeO4 was also more active and stable than TiO2-based catalysts toward photocatalytic decomposition of other volatile aromatic pollutants (e.g., toluene and ethylbenzene).
引用
收藏
页码:7387 / 7391
页数:5
相关论文
共 22 条
[1]   International symposium: Recent advances in benzene toxicity [J].
Bird, MG ;
Greim, H ;
Snyder, R ;
Rice, JM .
CHEMICO-BIOLOGICAL INTERACTIONS, 2005, 153 :1-5
[2]   PREDICTION OF FLATBAND POTENTIALS AT SEMICONDUCTOR-ELECTROLYTE INTERFACES FROM ATOMIC ELECTRONEGATIVITIES [J].
BUTLER, MA ;
GINLEY, DS .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1978, 125 (02) :228-232
[3]   Potential health effects of gasoline and its constituents: A review of current literature (1990-1997) on toxicological data [J].
Caprino, L ;
Togna, GI .
ENVIRONMENTAL HEALTH PERSPECTIVES, 1998, 106 (03) :115-125
[4]   Promoting effects of H2 on photooxidation of volatile organic pollutants over Pt/TiO2 [J].
Chen, YL ;
Li, DZ ;
Wang, XC ;
Wu, L ;
Wang, XX ;
Fu, XZ .
NEW JOURNAL OF CHEMISTRY, 2005, 29 (12) :1514-1519
[5]   H2-O2 atmosphere increases the activity of Pt/TiO2 for benzene photocatalytic oxidation by two orders of magnitude [J].
Chen, YL ;
Li, DZ ;
Wang, XC ;
Wang, XX ;
Fu, XZ .
CHEMICAL COMMUNICATIONS, 2004, (20) :2304-2305
[6]   Improvement of catalyst durability by deposition of Rh on TiO2 in photooxidation of aromatic compounds [J].
Einaga, H ;
Ibusuki, T ;
Futamura, S .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2004, 38 (01) :285-289
[7]   Complete oxidation of benzene in eas phase by platinized titania photocatalysts [J].
Einaga, H ;
Futamura, S ;
Ibusuki, T .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (09) :1880-1884
[8]   Photocatalytic decomposition of benzene over TiO2 in a humidified airstream [J].
Einaga, H ;
Futamura, S ;
Ibusuki, T .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1999, 1 (20) :4903-4908
[9]   THE GAS-PHASE PHOTOCATALYTIC MINERALIZATION OF BENZENE ON POROUS TITANIA-BASED CATALYSTS [J].
FU, XZ ;
ZELTNER, WA ;
ANDERSON, MA .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1995, 6 (03) :209-224
[10]   Photocatalytic performance of α-, β-, and γ-Ga2O3 for the destruction of volatile aromatic pollutants in air [J].
Hou, Yidong ;
Wu, Ling ;
Wang, Xinchen ;
Ding, Zhengxin ;
Li, Zhaohui ;
Fu, Xianzhi .
JOURNAL OF CATALYSIS, 2007, 250 (01) :12-18