物理化学学报Issue(8)：1543-1549,7.DOI:10.3866/PKU.WHXB201406161
微波辅助溶剂热合成In-Si共改性TiO2的增强光催化性能
Microwave-Assisted Solvothermal Synthesis of In-Si Co-Modified TiO2 Photocatalysts with Enhanced Photocatalytic Activity
摘要
Abstract
In-Si co-modified TiO2 photocatalysts were synthesized via a microwave-assisted solvothermal method. The obtained materials were characterized by X-ray diffraction (XRD), Raman spectroscopy, N2 ad-desorption (BET), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). The photocatalysts al exist in an anatase phase, despite the fact that the crystal inity slightly decreased upon modification of the TiO2 photocatalysts. Si-modification resulted in smal er nanoparticles and larger specific surface areas. In-modification led to the formation of In2O3 on the surface of TiO2, such that In cannot enter the TiO2 lattice, contributing to efficient charge transfer between the coupled semiconductors In2O3 and TiO2. Degradation of Rhodamine B (RhB) showed that In-Si co-modified TiO2 photocatalysts can exhibit high photocatalytic activity under both ultraviolet and visible light. The highest activity was obtained for In-Si co-modified TiO2 with an Si:In:Ti molar ratio of 0.03:0.02:1 (IST-2), with which RhB was completely degraded within 3 min under ultraviolet light and where 97%of RhB was degraded after 120 min under visible light. The improved photocatalytic activity of In-Si co-modified TiO2 may be ascribed to synergistic effects between large surface area, efficient electron transmission at the In2O3-TiO2 interface, and the dye sensation effect of RhB. Photodegradation for colorless phenol occurred at a much slower rate than that for RhB, and the phenol did not completely degrade within 700 min.关键词
二氧化钛/氧化铟/光催化/改性/掺杂Key words
TiO2/In2O3/Photocatalysis/Modification/Doping分类
化学化工引用本文复制引用
田红,王会香,史卫梅,徐耀..微波辅助溶剂热合成In-Si共改性TiO2的增强光催化性能[J].物理化学学报,2014,(8):1543-1549,7.基金项目
The project was supported by the Natural Science Foundation of Shanxi Province, China (2011011007-3).山西省自然科学基金(2011011007-3)资助项目 （2011011007-3）
