催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (10): 987-991.

• 研究论文 • 上一篇    下一篇

SiO2-TiO2中空型界面光催化剂的制备及性能

许章炼,王晟,王騊,王维,陈文兴   

  1. 浙江理工大学先进纺织材料与制备技术教育部重点实验室, 浙江杭州 310018
  • 收稿日期:2008-10-25 出版日期:2008-10-25 发布日期:2008-10-25

Preparation and Properties of Nanovoid SiO2-TiO2 Phase-Boundary Photocatalysts

XU Zhanglian, WANG Sheng, WANG Tao, WANG Wei, CHEN Wenxing   

  1. Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, China
  • Received:2008-10-25 Online:2008-10-25 Published:2008-10-25

PDF

1001

被引次数

9

摘要： 采用十八烷基三乙氧基硅烷对TiO2和核壳中空型纳米粒子SiO2-TiO2进行了壳表面疏水烷基化修饰,制备出新型界面光催化剂,并用IR和XRD进行表征. 在紫外光照射下,考察了两种界面光催化剂的光稳定性,并以弱酸性黄G溶液的界面光降解为模型反应,考察了催化剂的光催化活性. 结果表明,长链烷基成功接枝在了两种纳米粒子表面,且改性前后晶型无变化. 与TiO2界面光催化剂相比, SiO2-TiO2界面光催化剂不仅具有优异的界面光稳定性,同时在无搅拌状态下对弱酸性黄G溶液也有良好的光催化活性.

关键词: 二氧化钛, 二氧化硅, 中空结构, 界面, 纳米粒子, 光催化

Abstract: Novel phase-boundary photocatalysts were prepared by partial modification of th e surface of nanovoid SiO2-TiO2 nanoparticles with octadecyltriethoxysilan e (ODTS). Compared with TiO2 nanoparticles, the surface-alkylsilylated nanovoid SiO2-TiO2 nanoparticles showed excellent photostability and h igh photocatalytic activity for photodegradation of weak acid yellow G solution with mechanical stirring.

Key words: titanium dioxide, silica, nanovoid structure, phase-boundary, nanoparticles, photocatalysis