论文成果
Synthesis of highly dispersed silver nanoparticles or nano-network modified KIT-6 using supercritical carbon dioxide
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- 论文类型：期刊论文
- 发表时间：2015-01-01
- 发表刊物：JOURNAL OF MATERIALS SCIENCE
- 收录刊物：SCIE、EI
- 文献类型：J
- 卷号：50
- 期号：2
- 页面范围：855-862
- ISSN号：0022-2461
- 摘要：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 N-2 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 scCO(2), which was beneficial to the adsorption of precursor on the substrates.
