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题名: Layer-by-layer assembly of TiO2 colloids onto diatomite to build hierarchical porous materials
作者: Jia, Yuxin1, 2;  Han, Wei1, 2;  Xiong, Guoxing1;  Yang, Weishen1
通讯作者: 熊国兴
关键词: TiO2 colloids ;  nanoparticles ;  diatomite ;  layer-by-layer assembly ;  phytic acid ;  hierarchical porous materials
刊名: JOURNAL OF COLLOID AND INTERFACE SCIENCE
发表日期: 2008-07-15
DOI: 10.1016/j.jcis.2008.04.020
卷: 323, 期:2, 页:326-331
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 504
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: TiO2 colloids with the most probably particle size of 10 nm were deposited on the surface of macroporous diatomite by a layer-by-layer (LBL) assembly method with using phytic acid as molecular binder. For preparation of colloidal TiO2, titanium(IV) isopropoxicle (Ti(C3H7O)(4)) was used as titanium precursor, nitric acid (HNO3) as peptizing agent and deionized water and isopropanol (C3H7OH) as solvent. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), N-2 adsorption-desorption, and UV-vis spectra are used to assess the morphology and physical chemistry properties of the resulting TiO2 coated diatomite. It was shown that the mesoporosity has been introduced into macroporous diatomite by LBL deposition. The mesoporosity was originated from close-packing of the uniform TiO2 nanoparticles. More TiO2 could be coated on the surface of diatomite by increasing the deposition cycles. This hierarchical porous material has potential for applications in catalytic reactions involved diffusion limit, especially in photocatalytic reactions. (c) 2008 Elsevier Inc. All rights reserved
关键词[WOS]: PHOTOCATALYTIC ACTIVITY ;  MACROPOROUS TIO2 ;  TITANIA SPHERES ;  SILICA ;  ELECTROCHEMISTRY ;  HYDROGENATION ;  ZEOLITIZATION ;  DEPOSITION ;  MULTISTEP ;  CATALYST
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000256743300019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100297
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Jia, Yuxin,Han, Wei,Xiong, Guoxing,et al. Layer-by-layer assembly of TiO2 colloids onto diatomite to build hierarchical porous materials[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2008,323(2):326-331.
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