Surface properties of fumed silica/pyrocarbon prepared by pyrolysis of methylene chloride

被引：5
|
作者：
Seledets, O
Skubiszewska-Zieba, J
Leboda, R
Gun'ko, VM
机构：
[1] Marie Curie Sklodowska Univ, Fac Chem, Dept Chem Phys, PL-20031 Lublin, Poland
[2] Inst Surface Chem, UA-03164 Kiev, Ukraine
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2003年 / 82卷 / 01期
关键词：
fumed silica; pyrocarbon; methylene chloride; TEM; DTA;
D O I：
10.1016/S0254-0584(03)00208-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The series of pyrocarbon/fumed silica (CS) samples having different carbon concentrations (2.6-53 wt.%) synthesized by means of pyrolysis of CH2Cl2 at fumed silica substrate (S-BET = 232 m(2)/g) was studied by TEM, DTG and nitrogen adsorption-desorption methods. On CH2Cl2 carbonization, the disordered carbon deposits can form mainly in the interparticle volume of fractal aggregates of primary particles and their agglomerates; therefore, a significant reduction in the pore volume and the specific surface area is observed with increasing carbon concentration (CC). Porous structure of the tested samples and features of decomposition of pyrocarbon on heating are in correlation with morphology and topography of the adsorbents. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：199 / 205
页数：7
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