通过在反相微乳液中用银纳米颗粒修饰二氧化钛制备可见光纳米光催化剂。
Preparation of visible-light nano-photocatalysts through decoration of TiO2 by silver nanoparticles in inverse miniemulsions.
作者信息
Cao Zhihai, Zhu Shudi, Qu Hui, Qi Dongming, Ziener Ulrich, Yang Liu, Yan Yingjie, Yang Haitang
机构信息
College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Xuelin Street 16, Hangzhou 310036, China; Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China.
College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Xuelin Street 16, Hangzhou 310036, China.
出版信息
J Colloid Interface Sci. 2014 Dec 1;435:51-8. doi: 10.1016/j.jcis.2014.08.021. Epub 2014 Aug 20.
Ag/TiO2 nanocomposites were prepared through combination of a sol-gel process of a titanium precursor in inverse miniemulsions and in situ reduction of silver ions in the "nanoreactors". The morphological investigation shows that Ag nanoparticles are mainly located on the surface of TiO2 nano-supports because of the fast reduction rate of Ag ions by hydrazine. Ag/TiO2 nanocomposites with amorphous or anatase TiO2 phase displayed high visible-light catalytic activity for degradation of Rhodamine B. The photoactivity of Ag/anatase TiO2 nanocomposites could be influenced by the Ag content that could be conveniently tuned by the loading of silver salts. The influence of the loading of silver salts on the particle properties of the Ag/TiO2 nanocomposites was investigated systematically.
通过钛前驱体在反相微乳液中的溶胶-凝胶过程与“纳米反应器”中银离子的原位还原相结合制备了Ag/TiO₂纳米复合材料。形态学研究表明，由于肼对银离子的快速还原速率，银纳米颗粒主要位于TiO₂纳米载体的表面。具有非晶态或锐钛矿TiO₂相的Ag/TiO₂纳米复合材料对罗丹明B的降解表现出高可见光催化活性。Ag/锐钛矿TiO₂纳米复合材料的光活性会受到银含量的影响，而银含量可通过银盐负载方便地调节。系统研究了银盐负载对Ag/TiO₂纳米复合材料颗粒性质的影响。
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