Sonophotocatalytic degradation of methyl orange by nano-sized Ag/TiO2 particles in aqueous solutions

被引:85
作者
Wang, Hongyuan [1 ]
Niu, Junfeng [1 ]
Long, Xingxing [1 ]
He, Ya [1 ]
机构
[1] Beijing Normal Univ, State Key Lab Water Environm Simulat, Sch Environm, Beijing 100875, Peoples R China
基金
国家高技术研究发展计划(863计划);
关键词
methyl orange; Ag/TiO2; kinetics; photocatalyst; sonophotocatalysis;
D O I
10.1016/j.ultsonch.2007.09.011
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Sonophotocatalytic behaviour of methyl orange (MeO) in aqueous solution illuminated by light generated by a xenon lamp was investigated. For all three kinds of photocatalysts: Degussa P25 (75% anatase, 25% rutile, with a surface area of 55.07 m(2)/g), Yili TiO2 (mainly anatase, with a surface area of 10.45 m(2)/g) and Ag/TiO2 (silver loaded on Yili TiO2), the degradation followed pseudo-first order kinetics. The results showed a synergistic effect between sonolysis and photocatalysis. Some parameters affecting the sonophotocatalytic degradation of MeO with nanoparticles Ag/TiO2 Were determined. The results indicated that the degradation ratio of MeO increased with the increase of ultrasonic power. An optimum 60 mg/L of Ag/TiO2 added to relatively low concentrations of MeO was proved to have the most effective degradation efficiency. The study on the effects of hydroxyl radical ((OH)-O-center dot) scavengers (i.e. mannitol and dimethyl sulfoxide) on the MeO degradation indicated that (OH)-O-center dot radicals played an important role during MeO degradation, which enhanced MeO to be completely decomposed. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:386 / 392
页数:7
相关论文
共 35 条
[1]  
[Anonymous], XRAY DIFFRACTION PRO
[2]   Silver-modified titanium dioxide thin films for efficient photodegradation of methyl orange [J].
Arabatzis, IM ;
Stergiopoulos, T ;
Bernard, MC ;
Labou, D ;
Neophytides, SG ;
Falaras, P .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 42 (02) :187-201
[3]   Photocatalytic degradation of methyl orange by gold silver nano-core/silica nano-shell [J].
Badr, Y. ;
Mahmoud, M. A. .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2007, 68 (03) :413-419
[4]   Photocatalytic decolorization of methyl orange in aqueous medium of TiO2 and Ag-TiO2 immobilized on γ-Al2O3 [J].
Chen, LC ;
Tsai, FR ;
Huang, CM .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2005, 170 (01) :7-14
[5]   Purification of a new manganese peroxidase of the white-rot fungus Schizophyllum sp F17, and decolorization of azo dyes by the enzyme [J].
Cheng Xiaobin ;
Jia Rong ;
Li Pingsheng ;
Tu Shiqian ;
Zhu Qin ;
Tang Wenzhong ;
Li Xudong .
ENZYME AND MICROBIAL TECHNOLOGY, 2007, 41 (03) :258-264
[6]   Role of metal nanoparticles in TiO2/Ag nanocomposite-based microheterogeneous photocatalysis [J].
Cozzoli, PD ;
Fanizza, E ;
Comparelli, R ;
Curri, ML ;
Agostiano, A ;
Laub, D .
JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (28) :9623-9630
[7]   Photocatalytic oxidation of chlorinated hydrocarbons in water [J].
Crittenden, JC ;
Liu, JB ;
Hand, DW ;
Perram, DL .
WATER RESEARCH, 1997, 31 (03) :429-438
[8]   Synergistic effects of sonolysis combined with ozonolysis for the oxidation of azobenzene and methyl orange [J].
Destaillats, H ;
Colussi, AJ ;
Joseph, JM ;
Hoffmann, MR .
JOURNAL OF PHYSICAL CHEMISTRY A, 2000, 104 (39) :8930-8935
[9]   Degradation of aryl-azo-naphthol dyes by ultrasound, ozone and their combination:: Effect of α-substituents [J].
Gültekin, I ;
Ince, NH .
ULTRASONICS SONOCHEMISTRY, 2006, 13 (03) :208-214
[10]   Electrochemical removal of the hazardous dye Reactofix Red 3 BFN from industrial effluents [J].
Gupta, Vinod Kumar ;
Jain, Rajeev ;
Varshney, Shaily .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2007, 312 (02) :292-296