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硅酸盐通报 ›› 2010, Vol. 29 ›› Issue (1): 72-76.

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Ag/TiO_2纳米复合物的模板法制备及其性质研究

司友琳;张胜义;闵宏林   

  1. 蚌埠医学院化学教研室,蚌埠,233030;安徽大学化学化工学院,合肥,230039
  • 出版日期:2010-02-15 发布日期:2021-01-18
  • 基金资助:
    国家自然科学基金(20875001)%安徽省教育厅自然科学研究项目(KJ2008B106ZC)

Preparation and Characterization of Silver Deposited Nano-TiO_2 through the Chitosan Template Method

SI You-lin;ZHANG Sheng-yi;MIN Hong-lin   

  • Online:2010-02-15 Published:2021-01-18

摘要: 本文以壳聚糖为模板剂,用NaBH_4还原法制备了表面沉积Ag的纳米TiO_2粉体.采用透射电镜(TEM)、X射线粉末衍射(XRD)、傅立叶红外光谱(FT-IR)以及紫外-可见光谱(UV-Vis)等手段对产物进行了分析和表征.结果表明:壳聚糖的加入,使银的还原反应易于控制;Ag沉积纳米TiO_2粒子的UV-Vis光谱吸收阈值显著红移.所得产物在日光下对有机染料甲基橙有很好的光催化降解作用;无光照条件下,产物有很好的抗菌效果.

关键词: 壳聚糖模板;纳米Ag/TiO_2;光催化;抗菌

Abstract: In the presence of the chitosan template, reduction with silver deposited TiO_2 nanoparticles were prepared via reduction with NaBH_4. The Ag/TiO_2 nanoparticles were characterized by TEM, XRD, FT-IR, and UV-Vis. The results showed that chitosan accession to the silver reduction reaction can be controlled easily;Nano-Ag/TiO_2 shaped in the square for most particles and the red-shift was observed clearly in the UV-Vis adsorption spectrum. The photocatalytic activity of the as-prepared Ag/TiO_2 nanopowders is satisfactory, which was confirmed by organic photodegradating tests under the sun light. In the absence of sunlight, the as-prepared Ag/TiO_2 has good anti-bacterial effect.

Key words: chitosan template;Ag/TiO_2 nanoparticles;photocatalysis;antibacterial

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