Porous TiO2 Materials through Pickering High-Internal Phase Emulsion Templating
文献类型：期刊论文
| 作者 | Li, Xiaodong1; Sun, Guanqing1; Li, Yecheng1; Yu, Jimmy C.1; Wu, Jie2; Ma, Guang-Hui2; Ngai, To1 |
| 刊名 | LANGMUIR
 |
| 出版日期 | 2014-03-18 |
| 卷号 | 30期号:10页码:2676-2683 |
| 关键词 | photocatalytic activity synthesis parameters mesoporous silica polymer scaffolds surface-area particles titania foams fabrication morphology |
| ISSN号 | 0743-7463 |
| 其他题名 | Langmuir |
| 中文摘要 | We report a facile method for preparing porous structured TiO2 materials by templating from Pickering high-internal phase emulsions (HIPEs). A Pickering HIPE with an internal phase of up to 80 vol %, stabilized by poly(N-isopropylacrylamide)-based microgels and TiO2 solid nanoparticles, was first formulated and employed as a template to prepare the porous TiO2 materials with an interconnected structure. The resultant materials were characterized by scanning electron microscopy, X-ray diffraction, and mercury intrusion. Our results showed that the parent emulsion droplets promoted the formation of macropores and interconnecting throats with sizes of similar to 50 and similar to 10 mu m, respectively, while the interfacially adsorbed microgel stabilizers drove the formation of smaller pores (similar to 100 nm) throughout the macroporous walls after drying and sintering. The interconnected structured network with the bimodal pores could be well preserved after calcinations at 800 degrees C. In addition, the photocatalytic activity of the fabricated TiO2 was evaluated by measuring the photodegradation of Rhodamine B in water. Our results revealed that the fabricated TiO2 materials are good photocatalysts, showing enhanced activity and stability in photodegrading organic molecules. |
| 英文摘要 | We report a facile method for preparing porous structured TiO2 materials by templating from Pickering high-internal phase emulsions (HIPEs). A Pickering HIPE with an internal phase of up to 80 vol %, stabilized by poly(N-isopropylacrylamide)-based microgels and TiO2 solid nanoparticles, was first formulated and employed as a template to prepare the porous TiO2 materials with an interconnected structure. The resultant materials were characterized by scanning electron microscopy, X-ray diffraction, and mercury intrusion. Our results showed that the parent emulsion droplets promoted the formation of macropores and interconnecting throats with sizes of similar to 50 and similar to 10 mu m, respectively, while the interfacially adsorbed microgel stabilizers drove the formation of smaller pores (similar to 100 nm) throughout the macroporous walls after drying and sintering. The interconnected structured network with the bimodal pores could be well preserved after calcinations at 800 degrees C. In addition, the photocatalytic activity of the fabricated TiO2 was evaluated by measuring the photodegradation of Rhodamine B in water. Our results revealed that the fabricated TiO2 materials are good photocatalysts, showing enhanced activity and stability in photodegrading organic molecules. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Chemistry ; Materials Science |
| 关键词[WOS] | PHOTOCATALYTIC ACTIVITY ; SYNTHESIS PARAMETERS ; MESOPOROUS SILICA ; POLYMER SCAFFOLDS ; SURFACE-AREA ; PARTICLES ; TITANIA ; FOAMS ; FABRICATION ; MORPHOLOGY |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000333235500011 |
| 公开日期 | 2014-05-06 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/8168]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xiaodong,Sun, Guanqing,Li, Yecheng,et al. Porous TiO2 Materials through Pickering High-Internal Phase Emulsion Templating[J]. LANGMUIR,2014,30(10):2676-2683. |
| APA | Li, Xiaodong.,Sun, Guanqing.,Li, Yecheng.,Yu, Jimmy C..,Wu, Jie.,...&Ngai, To.(2014).Porous TiO2 Materials through Pickering High-Internal Phase Emulsion Templating.LANGMUIR,30(10),2676-2683. |
| MLA | Li, Xiaodong,et al."Porous TiO2 Materials through Pickering High-Internal Phase Emulsion Templating".LANGMUIR 30.10(2014):2676-2683. |
入库方式： OAI收割
来源：过程工程研究所
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