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

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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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Acknowledgements

The work was financially supported by the National Natural Science Foundation of China (20976026, 20976028, 21376045) and Doctoral Fund of Ministry of Education of China (20120041110022).

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Authors and Affiliations

  1. State Key Laboratory of Fine Chemicals, School of Chemical Machinery, Dalian University of Technology, Dalian, 116024, China

    Qin-Qin Xu, Yu-Ling Ma, Gang Xu, Jia-Xuan Ma, Jian-Zhong Yin & **-Ji Gao

  2. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China

    Ai-Qin Wang

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  1. Qin-Qin Xu
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Xu, QQ., Ma, YL., Xu, G. et al. Synthesis of highly dispersed silver nanoparticles or nano-network modified KIT-6 using supercritical carbon dioxide. J Mater Sci 50, 855–862 (2015). https://doi.org/10.1007/s10853-014-8646-9

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  • DOI: https://doi.org/10.1007/s10853-014-8646-9

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