Enhanced photocatalytic activity of tio2 nano-structured thin film with a silver hierarchical configuration
文献类型：期刊论文
| 作者 | Zheng, Jinyu1,2; Yu, Hua3,4; Li, Xinjun1; Zhang, Shanqing3,4 |
| 刊名 | Applied surface science
 |
| 出版日期 | 2008-01-15 |
| 卷号 | 254期号:6页码:1630-1635 |
| 关键词 | Photocatalysis Tio2 thin film Ag loading |
| ISSN号 | 0169-4332 |
| DOI | 10.1016/j.apsusc.2007.07.165 |
| 通讯作者 | Li, xinjun(lixj@ms.giec.ac.cn) |
| 英文摘要 | Tio2 sol-gels with various ag/tio2 molar ratios from 0 to 0.9% were used to fabricate silver-modified nano-structured tio2 thin films using a layer-by-layer dip-coating (lldc) technique. this technique allows obtaining tio2 nano-structured thin films with a silver hierarchical configuration. the coating of pure tio2 sol-gel and ag-modified sol-gel was marked as t and a, respectively. according to the coating order and the nature of the tio2 sol-gel, four types of the tio2 thin films were constructed, and marked as at (bottom layer was ag modified, surface layer was pure tio,), ta (bottom layer was pure tio,, surface layer was ag modified), tt (pure tio, thin film) and aa (tio, thin film was uniformly ag modified). these thin films were characterized by means of linear sweep voltammetry (lsv), x-ray diffraction (xrd), scanning electron microscopy (sem), electrochemical impedance spectroscopy and transient photocurrent (i-ph). lsv confirmed the existence of ago state in the tio, thin film. sem and xrd experiments indicated that the sizes of the tio,, nanoparticles of the resulting films were in the order of tt > at > ta > aa, suggesting the gradient ag distribution in the films. the sem and xrd results also confirmed that ag had an inhibition effect on the size growth of anatase nanoparticles. photocatalytic activities of the resulting thin films were also evaluated in the photocatalytic degradation process of methyl orange. the preliminary results demonstrated the sequence of the photocatalytic activity of the resulting films was at > ta > aa > tt. this suggested that the silver hierarchical configuration can be used to improve the photocatalytic activity of tio2 thin film. (c) 2007 elsevier b.v all rights reserved. |
| WOS关键词 | ORGANIC POLLUTANTS ; OXIDATION ; DEGRADATION ; DIOXIDE ; PERFORMANCE ; REDUCTION ; MECHANISM ; COLLOIDS ; SILICA ; SYSTEM |
| WOS研究方向 | Chemistry ; Materials Science ; Physics |
| WOS类目 | Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter |
| 语种 | 英语 |
| WOS记录号 | WOS:000252565000014 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2391097 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, Xinjun |
| 作者单位 | 1.Chinese Acad Sci, Guanzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Griffith Univ, Australian Rivers Inst, Southport, Qld 4222, Australia 4.Griffith Univ, Griffith Sch Environm, Southport, Qld 4222, Australia |
| 推荐引用方式 GB/T 7714 | Zheng, Jinyu,Yu, Hua,Li, Xinjun,et al. Enhanced photocatalytic activity of tio2 nano-structured thin film with a silver hierarchical configuration[J]. Applied surface science,2008,254(6):1630-1635. |
| APA | Zheng, Jinyu,Yu, Hua,Li, Xinjun,&Zhang, Shanqing.(2008).Enhanced photocatalytic activity of tio2 nano-structured thin film with a silver hierarchical configuration.Applied surface science,254(6),1630-1635. |
| MLA | Zheng, Jinyu,et al."Enhanced photocatalytic activity of tio2 nano-structured thin film with a silver hierarchical configuration".Applied surface science 254.6(2008):1630-1635. |
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来源：中国科学院大学
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