Grafting silica species on anatase surface for visible light photocatalytic activity
文献类型：期刊论文
| 作者 | Yang DJ ; Chen CC ; Zheng ZF ; Liu HW ; Waclawik ER ; Yan ZM ; Huang YN ; Zhang HJ ; Zhao JC ; Zhu HY |
| 刊名 | energy & environmental science
 |
| 出版日期 | 2011 |
| 卷号 | 4期号:6页码:2279-2287 |
| 关键词 | STATE H-1-NMR SPECTROSCOPY TITANIUM-DIOXIDE HETEROGENEOUS PHOTOCATALYSIS TIO2 PHOTOCATALYST ORGANIC POLLUTANTS BAND-GAP WATER IRRADIATION OXIDE DEGRADATION |
| ISSN号 | 1754-5692 |
| 通讯作者 | yang dj |
| 中文摘要 | the grafting of optimal trace silica on tio(2) (anatase) substrates possessing a large specific surface area can significantly enhance their photocatalytic activity for decomposing organic contaminants, such as chlorophenols and phenol in water under visible-light illumination. the silica grafting produces surface electronic states within the tio(2) band gap, which are responsible for the visible-light activity. different from the bulk doping, sio(2) was grafted on the anatase surface in two possible modes: (i) formation of sio(2) clusters on the surface; and (ii) substitution of si atoms for ti atoms of the outmost layer at the surface. thus, the surface electronic states originate mainly from the 2p orbitals of coordinationun-saturated oxygen atoms bound to si atoms. the location of these states depends on the forms by which the introduced silica species exist and the type of the grafted facet. nonetheless, the attempt of grafting the same substrate with alumina failed. also a greater enhancement in the visible-light activity was achieved when tio(2) surfaces with higher surface energy, such as the surfaces of anatase (010) and (116) planes, were grafted. advantages of the grafted approach include: (i) different from bulk-doping, the surface-grafting does not change the crystalline and electronic structure in the bulk of the photocatalysts; (ii) and consequently the electron mobility in the photocatalysts and their photocatalytic activity under uv irradiation are not affected, (iii) the grafted photocatalysts have high chemical stability and repeatable photocatalytic activity. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000291219100042 |
| 公开日期 | 2012-06-11 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/44604]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yang DJ,Chen CC,Zheng ZF,et al. Grafting silica species on anatase surface for visible light photocatalytic activity[J]. energy & environmental science,2011,4(6):2279-2287. |
| APA | Yang DJ.,Chen CC.,Zheng ZF.,Liu HW.,Waclawik ER.,...&Zhu HY.(2011).Grafting silica species on anatase surface for visible light photocatalytic activity.energy & environmental science,4(6),2279-2287. |
| MLA | Yang DJ,et al."Grafting silica species on anatase surface for visible light photocatalytic activity".energy & environmental science 4.6(2011):2279-2287. |
入库方式： OAI收割
来源：长春应用化学研究所
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