Effects of Silicon Content on Microstructure and Photocatalytic Activity of TiO2/SiO2 Composite Aerogels
Source abstract
Abstract
采用溶胶-凝胶法制备了不同Si含量的TiO 2 /SiO 2 复合气凝胶. 利用XRD、FTIR、XPS和BET等手段表征了复合气凝胶组织结构, 以甲基橙溶液光催化降解实验评价其光催化活性, 研究了Si含量对TiO 2 /SiO 2 复合气凝胶的结构及光催化性能影响规律. 结果表明: TiO 2 /SiO 2 复合气凝胶中Ti-O-Ti、Si-O-Si和Ti-O-Si键相互交织, 使复合气凝胶具有小晶粒尺寸、高比表面积和高热稳定性. 随着Si含量增大, TiO 2 /SiO 2 复合气凝胶中TiO 2 晶粒尺寸减小, TiO 2 结晶度降低, 比表面积增大, 平均孔径减小, 且TiO 2 /SiO 2 复合气凝胶对甲基橙溶液的光催化降解活性呈现先升后降的变化趋势. 适当Si含量能显著改善TiO 2 /SiO 2 复合气凝胶的结构和光催化性能, Si含量最佳值在9wt%附近.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Aerogels and thermal insulation · TiO2 Photocatalysis and Solar Cells · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (8)
Show source-provided references
1. Gan Lihua
2. Horiuchi T10.1023/A:1019069631852 ↗
3. Yoda S10.1023/A:1008731310240 ↗
4. Anderson C10.1021/jp9626982 ↗
5. Deng Zhongsheng10.1016/S0965-9773(99)00423-7 ↗
6. Suh D J10.1016/j.jnoncrysol.2004.08.230 ↗
7. Yoda S10.1023/A:1011216404208 ↗
8. Chen Rufen10.1016/S1674-4799(09)60037-6 ↗