Enhancement of photocatalytic activity of mesoporous TiO2 by using carbon nanotubes
文献类型：期刊论文
| 作者 | Yu, Y; Yu, JC; Yu, JG; Kwok, YC; Che, YK; Zhao, JC; Ding, L; Ge, WK; Wong, PK |
| 刊名 | APPLIED CATALYSIS A-GENERAL
 |
| 出版日期 | 2005-08-10 |
| 卷号 | 289期号:2页码:186-196 |
| 关键词 | Carbon Nanotubes Photocatalytic Activity Organic Pollutant Tio2 Sonochemistry Enhancement Hydroxyl Radical |
| ISSN号 | 0926-860X |
| DOI | 10.1016/j.apcata.2005.04.057 |
| 英文摘要 | Titanium dioxide/carbon nanotubes (TiO2/CNTs) composites were prepared with the aid of ultrasonic irradiation. Products of different TiO2:CNTs molar ratio were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) adsorption analysis, thermogravimetric and differential thermal analysis (TGA-DSC), photoluminescence (PL) and UV-vis spectroscopy measurements (UV-vis). The photocatalytic activity was evaluated by the degradation of acetone and by the detection of the hydroxyl radical (-OH) signals using electron paramagnetic resonance (EPR), It is found that the crystalline TiO2 is Composed of both anatase and brookite phases. The agglomerated morphology and the particle size of TiO2 in the composites change in the presence of CNTs. The CNTs in the composites are virtually all covered by TiO2. Other than an increase of the surface area, the addition of CNTs does not affect the mesoporous nature of the TiO2. Meanwhile, more hydroxyl groups are available on the surface of the composite than in the case of the pure TiO2. The higher the content of CNTs, there is more effective in the suppression of the recombination of photo-generated e(-)/h(+) pairs. However, excessive CNTs also shield the TiO2 from absorbing UV light. The optimal amount of TiO2 and CNTs is in the range of 1:0.1 and 1:0.2 (feedstock molar ratio). These samples have much more highly photocatalytic activity than P25 and TiO2/activated carbon (AC) composite. The mechanism for the enhanced photocatalytic activity of TiO2 by CNTs is proposed. (c) 2005 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000231058000010 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/56345]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wong, PK |
| 作者单位 | 1.Chinese Univ Hong Kong, Dept Biol, Hong Kong, Hong Kong, Peoples R China 2.Chinese Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China 3.Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China 4.Chinese Univ Hong Kong, Environm Sci Program, Hong Kong, Hong Kong, Peoples R China 5.Wuhan Univ Technol, State Key Lab Adv Technol Mat Synthesis & Proc, Wuhan 430070, Peoples R China 6.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China 7.Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Y,Yu, JC,Yu, JG,et al. Enhancement of photocatalytic activity of mesoporous TiO2 by using carbon nanotubes[J]. APPLIED CATALYSIS A-GENERAL,2005,289(2):186-196. |
| APA | Yu, Y.,Yu, JC.,Yu, JG.,Kwok, YC.,Che, YK.,...&Wong, PK.(2005).Enhancement of photocatalytic activity of mesoporous TiO2 by using carbon nanotubes.APPLIED CATALYSIS A-GENERAL,289(2),186-196. |
| MLA | Yu, Y,et al."Enhancement of photocatalytic activity of mesoporous TiO2 by using carbon nanotubes".APPLIED CATALYSIS A-GENERAL 289.2(2005):186-196. |
入库方式： OAI收割
来源：化学研究所
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