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Preparation and Thermal Stability in N2 Atmosphere of Pd/SiO2 Organic-inorganic Films

Authors： YANG Jing，XU Hao，LI Baosong，HUO Xiang，LI Yue

Units： School of Environmental&Chemistry Engineering, Xi’an Polytechnic University, Xi’an 710048)

KeyWords： Pd/SiO2 films；sol-gel method；hydrophobicity；thermal stability

ClassificationCode：O484

year,volume(issue):pagination： 2015, 35(1):9-13

Abstract：

Pd/SiO2 organic-inorganic films were prepared by sol-gel method, in which PdCl2 was added into methyl-modified silica sol. According to XRD, FTIR spectra, TG-DTG analysis, contact angle and SEM measurement, the thermal stability of Pd/SiO2 samples in N2 atmosphere was discussed. The results show that, metallic palladium peaks can be found in the Pd/SiO2 materials calcined at 200℃. The metallic palladium results from the reduction of PdCl2. With the increase of calcination temperature, the diffraction peaks of metallic palladium in intensity increase, the SiCH3 and Si－OH bands in Pd/SiO2 samples are found to be decreased in absorption intensity. As the calcining temperature reaches 750 C, the SiCH3 band completely disappears. The introduction of metallic palladium has little influence on the chemical structure of the methyl-modified silica materials. In order to preserve the hydrophobicity of Pd/SiO2 films and membranes, the optimal calcination temperature should be 350 C.

Funds：

国家自然科学基金（21103132）；陕西省自然科学基金（2011JQ2016）；陕西省教育厅自然科学专项基金（12JK0591）和西安工程大学博士科研启动基金（BS1006）资助

AuthorIntro：

杨靖（1976-），女，湖北武汉人，博士，副教授，硕士生导师，从事膜分离技术的研究. < jingy76@163.com>

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