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题名: One-Step Synthesis of Bifunctional TiO2 Catalysts and Their Photocatalytic Activity
作者: Fang, Jun1, 2;  Shi, Fucheng1, 2;  Bu, Jing1, 2;  Ding, Jianjun3;  Xu, Shutao4;  Bao, Jun3;  Ma, Yunsheng1, 2;  Jiang, Zhiquan1, 2;  Zhang, Weiping4;  Gao, Chen3;  Huang, Weixin1, 2
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2010-05-06
DOI: 10.1021/jp100519q
卷: 114, 期:17, 页:7940-7948
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: In this paper, we have investigated in detail the preparation of anatase TiO2 catalysts by the controlled thermal decomposition of ammonium titanyl sulfate ((NH4)(2)TiO(SO4)(2)) and their catalytic activity. The structures of anatase TiO2 catalysts have been characterized by powder X-ray diffraction, N-2 adsorption-desorption isotherms, diffuse reflectance UV-vis spectroscopy, infrared spectroscopy, X-ray photoemission spectroscopy, NH3 temperature-programmed desorption, and solid-state MAS NMR spectrometer. We report for the first time that the anatase TiO2 catalyst prepared by calcination of (NH4)2TiO(SO4)2 at 600 degrees C (TiO2-600) is a very active bifunctional catalyst. TiO2-600 is doped with N and S and thus very active in the photodegradation of methyl orange under visible light illumination (lambda > 420 nm); meanwhile, it also has a large number of Bronsted acid sites arising from the covalently bonded sulfuric acid groups and thus is active in the esterification of ethanol and acetic acid to ethyl acetate. The Pt/TiO2-600 photocatalysts with different Pt loadings were prepared via the incipient wetness impregnation method and their photocatalytic activity for the H-2 production from water splitting was evaluated with methanol as a sacrificial electron donor under both all-wavelength light and visible light (lambda > 400 nm) irradiation. All Pt/TiO2-600 photocatalysts show considerable photocatalytic activity of water splitting. The optimum Pt loading on TiO2-600 is 1 and 0.1 wt % for the all-wavelength light and visible light photocatalytic reaction, respectively. Our results demonstrate a facile method to prepare highly active bifunctional TiO2 catalysts promising in both visible-light-driven photocatalysis and acid catalysis.
关键词[WOS]: VISIBLE-LIGHT IRRADIATION ;  NITROGEN-DOPED TIO2 ;  SULFATED TIO2 ;  ENVIRONMENTAL PHOTOCHEMISTRY ;  MESOPOROUS ORGANOSILICAS ;  TITANIA NANOPARTICLES ;  HYDROGEN EVOLUTION ;  H-2 PRODUCTION ;  PORE WALL ;  OXIDE
语种: 英语
WOS记录号: WOS:000277053600059
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142185
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China
2.Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China
3.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China
4.Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Fang, Jun,Shi, Fucheng,Bu, Jing,et al. One-Step Synthesis of Bifunctional TiO2 Catalysts and Their Photocatalytic Activity[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2010,114(17):7940-7948.
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