Visible-light-responsive nano-TiO2 with mixed crystal lattice and its photocatalytic activity

被引:128
作者
Tseng, Yao-Hsuan [1 ]
Kuo, Chien-Sheng
Huang, Chia-Hung
Li, Yuan-Yao
Chou, Po-Wen
Cheng, Chia-Liang
Wong, Min-Show
机构
[1] Ind Technol Res Inst, Energy & Environm Res Labs, Hsinchu 310, Taiwan
[2] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi 621, Taiwan
[3] Natl Dong Hwa Univ, Dept Phys, Hualien 974, Taiwan
[4] Natl Dong Hwa Univ, Dept Mat Sci & Engn, Hualien 974, Taiwan
关键词
D O I
10.1088/0957-4484/17/10/009
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Ultraviolet- and visible-light-responsive titania-based photocatalysts were synthesized and employed in the photocatalytic oxidation of NOx. Sol-gel processes using tetrabutyl orthotitanate and ethanol under acid catalyzed condition and controlled calcination were performed to synthesize titanium dioxide with a mixed crystal lattice of anatase, brookite and rutile phases. The TiO2 prepared under calcination at 200 degrees C exhibited high photocatalytic activity for degradation of NOx under both ultraviolet (UV) and visible-light illumination. The experimental results showed that up to 70% removal of NOx could be obtained in a continuous flow type reaction system under irradiation with visible light. The calcination temperature has an important influence on the particle size and lattice structure of TiO2. It is also found that the peculiar mixed-phase structure of TiO2, evidenced from Raman, x-ray diffractometry (XRD), and UV-vis spectroscopy, was inferred to be an important factor for visible-light absorption and NOx removal activity under a wide range of visible-light illumination.
引用
收藏
页码:2490 / 2497
页数:8
相关论文
共 27 条
[1]   Design and development of titanium oxide photocatalysts operating under visible and UV light irradiation.: The applications of metal ion-implantation techniques to semiconducting TiO2 and Ti/zeolite catalysts [J].
Anpo, M ;
Takeuchi, M ;
Ikeue, K ;
Dohshi, S .
CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE, 2002, 6 (05) :381-388
[2]   PHOTOCATALYTIC HYDROGENATION OF CH3CCH WITH H2O ON SMALL-PARTICLE TIO2 - SIZE QUANTIZATION EFFECTS AND REACTION INTERMEDIATES [J].
ANPO, M ;
SHIMA, T ;
KODAMA, S ;
KUBOKAWA, Y .
JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (16) :4305-4310
[3]   Visible-light photocatalysis in nitrogen-doped titanium oxides [J].
Asahi, R ;
Morikawa, T ;
Ohwaki, T ;
Aoki, K ;
Taga, Y .
SCIENCE, 2001, 293 (5528) :269-271
[4]  
ATKINSON R, 1989, J PHYS CHEM REF DATA, V18, P887
[5]   A SMOG CHAMBER STUDY ON THE IMPACT OF AEROSOLS ON THE PHOTODEGRADATION OF CHEMICALS IN THE TROPOSPHERE [J].
BEHNKE, W ;
NOLTING, F ;
ZETZSCH, C .
JOURNAL OF AEROSOL SCIENCE, 1987, 18 (01) :65-71
[6]  
Fujishima A., 2000, J PHOTOCH PHOTOBIO C, V1, P1, DOI DOI 10.1016/S1389-5567(00)00002-2
[7]   Ta3N5 as a novel visible light-driven photocatalyst (λ<600 nm) [J].
Hitoki, G ;
Ishikawa, A ;
Takata, T ;
Kondo, JN ;
Hara, M ;
Domen, K .
CHEMISTRY LETTERS, 2002, (07) :736-737
[8]   An oxynitride, TaON, as an efficient water oxidation photocatalyst under visible light irradiation (λ ≤ 500 nm) [J].
Hitoki, G ;
Takata, T ;
Kondo, JN ;
Hara, M ;
Kobayashi, H ;
Domen, K .
CHEMICAL COMMUNICATIONS, 2002, (16) :1698-1699
[9]  
HOFFMANN MR, 1995, CHEM REV, V95, P96
[10]   Synthesis and photocatalytic activity of ZnO/ZnO2 cornposite [J].
Hsu, CC ;
Wu, NL .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2005, 172 (03) :269-274