Light-induced super-hydrophilicity and photocatalytic activity of mesoporous TiO2 thin films
文献类型：期刊论文
| 作者 | Yu, JC; Yu, JG; Ho, WK; Zhao, JC |
| 刊名 | JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
 |
| 出版日期 | 2002-05-31 |
| 卷号 | 148期号:1-3页码:331-339 |
| 关键词 | Mesoporous Tio2 Thin Films Modified Reverse Micellar Method Anatase Rutile Photocatalytic Activity Photoinduced Hydrophilicity |
| ISSN号 | 1010-6030 |
| 英文摘要 | Transparent mesoporous TiO2 (MTiO2) and TiO2 nanometer thin films were prepared on fused quartz via the modified reverse micellar and sot-gel methods. The MTiO2 and TiO2 films were characterized by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (ATM), X-ray diffraction (XRD), BET surface area and UV-Vis spectrophotometry. The photoinduced super-hydrophilicity and photocatalytic activity of the films were evaluated by the water contact angle measurement and photocatalytic oxidation of acetone in air, respectively. It was found that MTiO2 thin films at 500 degreesC showed higher photocatalytic activity and better light-induced hydrophilicity than the TiO2 thin films. This is attributed to the following reasons: (1) MTiO2 thin films are composed of smaller monodisperse spherical particles about 15 nm diameter, and possess more mesopores between spherical particles and higher surface areas and surface roughness, (2) the monodispersity of MTiO2 particles was beneficial to the transfer and separation of photo-generated electrons and holes inside of and on the surface of TiO2 particles, and reduced the recombination of photo-generated electrons and holes. At 900 degreesC, the MTiO2 and TiO2 films appeared to be in the rutile phase, but showed photoinduced hydrophilicity and no photocatalytic activity. This confirmed that the mechanism of photoinduced super-hydrophilicity of the films is different from that of photocatalytic oxidation. (C) 2002 Elsevier Science B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000176497700044 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/79433]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yu, JC |
| 作者单位 | 1.Chinese Univ Hong Kong, Dept Chem & Mat Sci, Shatin, Hong Kong, Peoples R China 2.Chinese Univ Hong Kong, Technol Res Ctr, Shatin, Hong Kong, Peoples R China 3.Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth, Wuhan 430070, Peoples R China 4.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Lab Photochem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, JC,Yu, JG,Ho, WK,et al. Light-induced super-hydrophilicity and photocatalytic activity of mesoporous TiO2 thin films[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,2002,148(1-3):331-339. |
| APA | Yu, JC,Yu, JG,Ho, WK,&Zhao, JC.(2002).Light-induced super-hydrophilicity and photocatalytic activity of mesoporous TiO2 thin films.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,148(1-3),331-339. |
| MLA | Yu, JC,et al."Light-induced super-hydrophilicity and photocatalytic activity of mesoporous TiO2 thin films".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY 148.1-3(2002):331-339. |
入库方式： OAI收割
来源：化学研究所
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