A mesoporous structure for efficient photocatalysts: Anatase nanocrystals attached to leached clay layers
文献类型：期刊论文
| 作者 | Yang, Xuzhuang1,3; Zhu, Huaiyong1; Liu, Jiangwen1; Gao, Xueping2; Martens, Wayde N.1; Frost, Ray L.1; Shen, Yuenian3; Yuan, Zhangfu4 |
| 刊名 | MICROPOROUS AND MESOPOROUS MATERIALS
 |
| 出版日期 | 2008-07-01 |
| 卷号 | 112期号:1-3页码:32-44 |
| 关键词 | anatase mesopores beidellite clay photocatalysts hydrothermal synthesis |
| ISSN号 | 1387-1811 |
| 其他题名 | Microporous Mesoporous Mat. |
| 中文摘要 | Increasing the content of anatase nanocrystals and improving the accessibility of these crystals to reactants (UV photons, organic contaminant molecules and oxygen molecules) will enhance photocatalytic performance. Thus we designed a synthesis approach to achieve such structures. The synthesis involves reaction of clay suspensions with TiOSO4, which leads to formation of anatase nanocrystals attaching to leached clay layers through Ti-O-Si bonds. It is also discovered that the crystal size, the pore size and the specific surface area of the catalysts, can be tailored by manipulating the acidity, the ratio of Ti/clay and the hydrothermal temperature of the synthesis systems. Such a synthesis is different from the conventional approach of pillared intercalated layered clays. The activity of these catalysts for the degradation of phenol was investigated, and we find that the catalytic activity increases with the increasing volume of the pore larger than 3 nm because formation of mesoporous system and anatase nanocrystals leads to improvement in the photocatalytic activity of photocatalysts. This new structure is a more efficient photocatalyst structure for degradating organic pollutant in water, compared to the conventional titania pillared layered clay. The knowledge acquired in this study is useful for designing photocatalysts with high efficiency. (C) 2007 Elsevier Inc. All rights reserved. |
| 英文摘要 | Increasing the content of anatase nanocrystals and improving the accessibility of these crystals to reactants (UV photons, organic contaminant molecules and oxygen molecules) will enhance photocatalytic performance. Thus we designed a synthesis approach to achieve such structures. The synthesis involves reaction of clay suspensions with TiOSO4, which leads to formation of anatase nanocrystals attaching to leached clay layers through Ti-O-Si bonds. It is also discovered that the crystal size, the pore size and the specific surface area of the catalysts, can be tailored by manipulating the acidity, the ratio of Ti/clay and the hydrothermal temperature of the synthesis systems. Such a synthesis is different from the conventional approach of pillared intercalated layered clays. The activity of these catalysts for the degradation of phenol was investigated, and we find that the catalytic activity increases with the increasing volume of the pore larger than 3 nm because formation of mesoporous system and anatase nanocrystals leads to improvement in the photocatalytic activity of photocatalysts. This new structure is a more efficient photocatalyst structure for degradating organic pollutant in water, compared to the conventional titania pillared layered clay. The knowledge acquired in this study is useful for designing photocatalysts with high efficiency. (C) 2007 Elsevier Inc. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 关键词[WOS] | SELECTIVE CATALYTIC-REDUCTION ; TITANIA-PILLARED CLAYS ; SIZE DISTRIBUTION ; MONTMORILLONITE ; SILICATES ; OXIDE ; HYDROCARBONS ; DEGRADATION ; PERFORMANCE ; MECHANISMS |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000256713300004 |
| 公开日期 | 2013-10-08 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/2895]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Queensland Univ Technol, Sch Phys & Chem Sci, Inorgan Mat Res Program, Brisbane, Qld 4001, Australia 2.Nankai Univ, Inst New Energy Mat chem, Tianjin 300071, Peoples R China 3.Inner Mongolia Univ, Coll Chem & Chem Engn, Hohhot 010021, Peoples R China 4.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Xuzhuang,Zhu, Huaiyong,Liu, Jiangwen,et al. A mesoporous structure for efficient photocatalysts: Anatase nanocrystals attached to leached clay layers[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2008,112(1-3):32-44. |
| APA | Yang, Xuzhuang.,Zhu, Huaiyong.,Liu, Jiangwen.,Gao, Xueping.,Martens, Wayde N..,...&Yuan, Zhangfu.(2008).A mesoporous structure for efficient photocatalysts: Anatase nanocrystals attached to leached clay layers.MICROPOROUS AND MESOPOROUS MATERIALS,112(1-3),32-44. |
| MLA | Yang, Xuzhuang,et al."A mesoporous structure for efficient photocatalysts: Anatase nanocrystals attached to leached clay layers".MICROPOROUS AND MESOPOROUS MATERIALS 112.1-3(2008):32-44. |
入库方式： OAI收割
来源：过程工程研究所
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