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Single-source-precursor synthesis and high-temperature evolution of novel mesoporous SiVN(O)-based ceramic nanocomposites

Zhou, Cong and Ott, Alexander and Ishikawa, Ryo and Ikuhara, Yuichi and Riedel, Ralf and Ionescu, Emanuel (2020):
Single-source-precursor synthesis and high-temperature evolution of novel mesoporous SiVN(O)-based ceramic nanocomposites.
In: Journal of the European Ceramic Society, 40 (16), pp. 6280-6287. Elsevier, ISSN 09552219,
DOI: 10.1016/j.jeurceramsoc.2019.11.021,
[Article]

Abstract

Mesoporous SiVN(O) ceramics were prepared from a mixture consisting of VO(acac)2-modified perhydropolysilazane and polystyrene. The resulting amorphous single-phase SiVN(O) ceramics remained amorphous in nitrogen atmosphere up to 1400 °C. The as-prepared materials consist of nanoscaled vanadium nitride dispersed in amorphous Si3N4; exposure to 1600 °C leads to the crystallization of VN and Si3N4. The specific surface area (SSA) and the pore size of the SiVN(O)-based ceramics can be easily controlled by the temperature of thermal treatment and by the amount of polystyrene. The average pore size of the prepared SiVN(O) ceramics was 4–10 nm and their largest SSA values, 642 and 506 m2/g, were achieved upon ammonolysis at 800 and 1000 °C, respectively. The combination of metal-modified single-source precursors and encapsulated porogens provides a convenient one-pot synthesis process to prepare mesoporous ceramic nanocomposites with controllable phase compositions and morphology.

Item Type: Article
Erschienen: 2020
Creators: Zhou, Cong and Ott, Alexander and Ishikawa, Ryo and Ikuhara, Yuichi and Riedel, Ralf and Ionescu, Emanuel
Title: Single-source-precursor synthesis and high-temperature evolution of novel mesoporous SiVN(O)-based ceramic nanocomposites
Language: English
Abstract:

Mesoporous SiVN(O) ceramics were prepared from a mixture consisting of VO(acac)2-modified perhydropolysilazane and polystyrene. The resulting amorphous single-phase SiVN(O) ceramics remained amorphous in nitrogen atmosphere up to 1400 °C. The as-prepared materials consist of nanoscaled vanadium nitride dispersed in amorphous Si3N4; exposure to 1600 °C leads to the crystallization of VN and Si3N4. The specific surface area (SSA) and the pore size of the SiVN(O)-based ceramics can be easily controlled by the temperature of thermal treatment and by the amount of polystyrene. The average pore size of the prepared SiVN(O) ceramics was 4–10 nm and their largest SSA values, 642 and 506 m2/g, were achieved upon ammonolysis at 800 and 1000 °C, respectively. The combination of metal-modified single-source precursors and encapsulated porogens provides a convenient one-pot synthesis process to prepare mesoporous ceramic nanocomposites with controllable phase compositions and morphology.

Journal or Publication Title: Journal of the European Ceramic Society
Journal volume: 40
Number: 16
Publisher: Elsevier
Uncontrolled Keywords: German Science Foundation, DFG (project “Micropatterned polymer-derived ceramic catalysts and sensors”), China Scholarship Council (CSC), Natural Science Foundation of Anhui Province of China, Grant Number 1908085QE220, Heisenberg programme of the DFG, Grant Number IO-64/14-1, “Nanotechnology Platform” from the Ministry of Education, Culture, Sports, Science, and Technology in Japan (MEXT), Grant Number 12024046
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 21 Oct 2020 07:01
DOI: 10.1016/j.jeurceramsoc.2019.11.021
Official URL: https://doi.org/10.1016/j.jeurceramsoc.2019.11.021
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