Preparation and Characterization of Radially Porous Silica and the Core-shell Structure

doi:10.3969/j.issn.0251-0790.2012.04.002

Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (04): 652.doi: 10.3969/j.issn.0251-0790.2012.04.002

• Article: Inorganic Chemistry • Previous Articles Next Articles

Preparation and Characterization of Radially Porous Silica and the Core-shell Structure

QI Juan-Juan^1,2,3, XU Dong-Yao¹, CAI Qiang², ZHANG Wei³

1. School of Chemical & Environmental Engineering, China University of Mining & Technology, Beijing 100083, China;
2. Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;
3. CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, Beijing 100190, China

Received:2011-11-21 Online:2012-04-10 Published:2012-04-10
Supported by:
国家自然科学基金(批准号: 50902025)资助.

Abstract

Abstract: At room temperature and in water-ethanol-ethyl ether solution with adding amino-modified solid silica, radially porous silica and the core-shell structure were synthesized using hexadecyltrimethylammonium bromide(CTAB) as template, tetraethylorthosilicate(TEOS) as silica source and ammonia solution as catalyst. Scanning electron microscopy(SEM), transmission electron microscopy(TEM), small angle X-ray diffraction technique(XRD), Nitrogen adsorption-desorption isotherms and the corresponding pore size distribution were used to characterize the samples. Results show that spheres with diameters of ca. 0.4-1 μm are obtained, the hierarchical and radial pores with the size from 3 nm to tens of nanometres are on the sample surface, and the BET surface area of the sample is 996 m²/g. The mechanism of radially porous silica and influential factors of core-shell structure were also discussed.

Key words: Radial pore, Silica, Core-shell structure, Ethyl ether

CLC Number:

O613.72

TrendMD:

QI Juan-Juan, XU Dong-Yao, CAI Qiang, ZHANG Wei. Preparation and Characterization of Radially Porous Silica and the Core-shell Structure[J]. Chem. J. Chinese Universities, 2012, 33(04): 652.

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Preparation and Characterization of Radially Porous Silica and the Core-shell Structure

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