Preparation and Thermal Stability of Pd-doped Organic-inorganic Hybrid Silica Materials in Air Atmosphere

摘要：

　　Pd-doped organic-inorganic hybrid silica (Pd/Si02) materials were prepared using the sol-gel method.The particle size distribution of Pd/Si02 sol and tiiermal stability of Pd/Si02 materials in air atmosphere were investigated.Most of tiie particle diameters of the freshly prepared Pd/Si02 sol are in the range of 2-5.5 nm.When the calcination temperature of Pd/Si02 materials is increased to 350 °C,metallic palladium of high crystallinity will be formed.The metallic palladium formed will be partly converted to PdO as the calcination temperature is increased to 500 °C.With the increase of calcination temperature,the Si-CH3 and Si-OH bands in Pd/Si02 materials are found to decrease in absorption intensity,and the water contact angles of Pd/Si02 films increase until 350 °C.The Si-CH3 band disappears completely when the calcining temperature is up to 750 °C.In order to preserve tiie hydrophobicity of Pd/Si02 membrane materials,the optimal calcination temperature should be 350 °C.

关键词： Sol-gel Method Hybrid Materials Hydrophobicity Thermal Stability

作者: Jing Yang Ya-Li Wang Bao-Song Li Yue Li

作者单位: School of Environmental & Chemical Engineering,Xian Polytechnic University,Xian,Shaanxi,China

会议类型: 国际会议

会议名称: 第六届纺织生物工程及信息国际会议(The 6th Textile Bioengineering and Informatics Symposium )(TBIS2013)

会议地点: 西安

会议语种:英文

页码: 60-65

在线出版日期: 2013-09-26（万方平台首次上网日期，不代表论文的发表时间）