Reduced graphene oxide-based photocatalysts containing Ag nanoparticles on a TiO2 nanotube array

被引：30
作者：
Wang, Yao [1 ]
Tang, Yanhong [2 ]
Chen, Yao [1 ]
Li, Yue [1 ]
Liu, Xuanneng [1 ]
Luo, Shenglian [1 ]
Liu, Chengbin [1 ]
机构：
[1] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE | 2013年 / 48卷 / 18期
基金：
中国国家自然科学基金;
关键词：
ENHANCED PHOTOCATALYSIS; LARGE-AREA; DEGRADATION; NANOCOMPOSITE; FILMS; FABRICATION; COMPOSITE; 2,4-D; PHOTODEGRADATION; ULTRATHIN;
D O I：
10.1007/s10853-013-7417-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A simple one-step electrochemical deposition method was demonstrated to fabricate reduced graphene oxide/Ag nanoparticle co-decorated TiO2 nanotube arrays (RGO/Ag-TiO2NTs) photocatalyst in this study. The structures and properties of these photocatalysts were characterized using scanning electron microscope, X-ray diffraction, UV-Vis diffuse reflection spectra, and photoluminescence. By taking the advantages of TiO2, graphene, and Ag nanoparticles (AgNPs), RGO/Ag-TiO2NTs showed a greatly improved photocatalytic activity compared with the bare TiO2NTs, Ag-TiO2NTs or RGO-TiO2NTs. The deposited RGO and AgNPs not only reduce the recombination of photogenerated electrons and holes, but also increase the surface area of the catalyst. Both photocatalytic performance and adsorptivity of the catalyst have been improved. The ternary photocatalyst exhibited over 93 % removal efficiency of typical herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) under simulated solar light irradiation with good stability and easy recovery, which justifies the photocatalytic system, a promising application for herbicide or other organic pollutant removal from water.
引用
收藏
页码：6203 / 6211
页数：9
相关论文
共 58 条
[1]   Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies [J].
Bach, U ;
Lupo, D ;
Comte, P ;
Moser, JE ;
Weissörtel, F ;
Salbeck, J ;
Spreitzer, H ;
Grätzel, M .
NATURE, 1998, 395 (6702) :583-585
[2]   Photodegradation of 2,4-D over PdO/Al2O3-Nd2O3 photocatalysts prepared by the sol-gel method [J].
Barrera, A. ;
Tzompantzi, F. ;
Lara, V. ;
Gomez, R. .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2012, 227 (01) :45-50
[3]   Photocatalytic degradation for environmental applications - a review [J].
Bhatkhande, DS ;
Pangarkar, VG ;
Beenackers, AACM .
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, 2002, 77 (01) :102-116
[4]   Direct electrodeposition of reduced graphene oxide on glassy carbon electrode and its electrochemical application [J].
Chen, Liuyun ;
Tang, Yanhong ;
Wang, Ke ;
Liu, Chengbin ;
Luo, Shenglian .
ELECTROCHEMISTRY COMMUNICATIONS, 2011, 13 (02) :133-137
[5]   Enhanced removal of pentachlorophenol and 2,4-D from aqueous solution by an aminated biosorbent [J].
Deng, Shubo ;
Ma, Rui ;
Yu, Qiang ;
Huang, Jun ;
Yu, Gang .
JOURNAL OF HAZARDOUS MATERIALS, 2009, 165 (1-3) :408-414
[6]   Large-area ultrathin films of reduced graphene oxide as a transparent and flexible electronic material [J].
Eda, Goki ;
Fanchini, Giovanni ;
Chhowalla, Manish .
NATURE NANOTECHNOLOGY, 2008, 3 (05) :270-274
[7]   Soluble Graphene: Generation of Aqueous Graphene Solutions Aided by a Perylenebisimide-Based Bolaamphiphile [J].
Englert, Jan M. ;
Roehrl, Jonas ;
Schmidt, Cordula D. ;
Graupner, Ralf ;
Hundhausen, Martin ;
Hauke, Frank ;
Hirsch, Andreas .
ADVANCED MATERIALS, 2009, 21 (42) :4265-+
[8]   Synthesis of TiO2/CdS nanocomposite via TiO2 coating on CdS nanoparticles by compartmentalized hydrolysis of Ti alkoxide [J].
Fujii, H ;
Inata, K ;
Ohtaki, M ;
Eguchi, K ;
Arai, H .
JOURNAL OF MATERIALS SCIENCE, 2001, 36 (02) :527-532
[9]   The rise of graphene [J].
Geim, A. K. ;
Novoselov, K. S. .
NATURE MATERIALS, 2007, 6 (03) :183-191
[10]   A Green Approach to the Synthesis of Graphene Nanosheets [J].
Guo, Hui-Lin ;
Wang, Xian-Fei ;
Qian, Qing-Yun ;
Wang, Feng-Bin ;
Xia, Xing-Hua .
ACS NANO, 2009, 3 (09) :2653-2659
123456