In situ formation of tungsten oxycarbide, tungsten carbide and tungsten nitride nanoparticles in micro- and mesoporous polymer-derived ceramics

被引：26
作者：
Bazarjani, Mahdi Seifollahi [1 ,2 ]
Mueller, Mathis M. [1 ]
Kleebe, Hans-Joachim [1 ]
Fasel, Claudia [1 ]
Riedel, Ralf [1 ]
Gurlo, Aleksander [1 ]
机构：
[1] Tech Univ Darmstadt, Fachbereich Mat & Geowissensch, D-64287 Darmstadt, Germany
[2] Carl von Ossietzky Univ Oldenburg, Inst Chem, D-26129 Oldenburg, Germany
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 27期
关键词：
HIGH-SURFACE-AREA; PORE-SIZE DISTRIBUTION; SILICON IMIDO NITRIDE; CATALYTIC APPLICATIONS; AMMONIA DECOMPOSITION; NONOXIDE CERAMICS; ORGANIC-DYES; SIC WHISKERS; MEMBRANES; HYDROGEN;
D O I：
10.1039/c4ta01509f
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We present a facile approach to design micro- and mesoporous ceramic nanocomposites, which avoids the sintering of nanoparticles even at high synthesis temperatures and in situ forms nanoparticles in high temperature stable porous silicon oxycarbonitride (SiOC(N)) matrices. Our case study includes the synthesis of micro- and mesoporous polymer nanocomposites (c-WO3-x/WO(3)xH(2)O/[-Si(O)CH2-](n)) which contain cubic tungsten oxide and tungsten oxide monohydrate (c-WO3-x/WO(3)xH(2)O) nanowhiskers in highly micro- and mesoporous polycarbosilane-siloxane matrices. The thermolysis of c-WO3-x/WO(3)xH(2)O/[-Si(O)CH2-](n) nanocomposites under a suitable atmosphere and temperature leads to the in situ formation of well-dispersed nanoparticles of cubic tungsten oxide (c-WO3-x), tungsten oxycarbide (W2CO), tungsten carbide (WC) and tungsten nitride (WN) in micro- and mesoporous matrices.
引用
收藏
页码：10454 / 10464
页数：11
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