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Journal of Materials Science

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01-01-2015 | Original Paper

Synthesis of highly dispersed silver nanoparticles or nano-network modified KIT-6 using supercritical carbon dioxide

Authors: Qin-Qin Xu, Yu-Ling Ma, Gang Xu, Jia-Xuan Ma, Jian-Zhong Yin, Ai-Qin Wang, Jin-Ji Gao

Published in: Journal of Materials Science | Issue 2/2015

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Abstract

Mesoporous KIT-6-supported highly dispersed silver nanoparticles and nano-networks were successfully synthesized in supercritical carbon dioxide and co-solvent solution using AgNO₃ as a precursor, followed by calcinations. The nanocomposites were characterized by XRD, TEM, ICP, and N₂ adsorption–desorption isotherms. Three kinds of co-solvents were investigated including ethanol, the mixture of ethanol and ethylene glycol, and the mixture of ethanol and water. It was found that when only ethanol was used as a co-solvent, a small amount of AgNO₃ was deposited onto the complex nanochannels of KIT-6 even if the deposition time was 12 h. However, it took a short deposition time of 1 h to deposit a large amount of precursors onto the substrates when the mixture of ethanol and ethylene glycol and the mixture of ethanol and water were used as co-solvents. The large solubility of AgNO₃ in ethylene glycol or water had a positive effect on the dissolution of precursor in scCO₂, which was beneficial to the adsorption of precursor on the substrates.

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Title: Synthesis of highly dispersed silver nanoparticles or nano-network modified KIT-6 using supercritical carbon dioxide
Authors: Qin-Qin Xu
Yu-Ling Ma
Gang Xu
Jia-Xuan Ma
Jian-Zhong Yin
Ai-Qin Wang
Jin-Ji Gao
Publication date: 01-01-2015
Publisher: Springer US
Published in: Journal of Materials Science / Issue 2/2015
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-014-8646-9

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