Instituto de Ciencia de Materiales de Sevilla, Centro Mixto Universidad de Sevilla-CSIC, 41092 Sevilla, Spain.
J Hazard Mater. 2011 Jan 30;185(2-3):1425-34. doi: 10.1016/j.jhazmat.2010.10.065. Epub 2010 Oct 23.
Highly efficient Bi(2)WO(6)-TiO(2) heterostructure is synthesized by means of a hydrothermal method having highly photoactivity for the degradation of Rhodamine B under sunlike irradiation. From the structural characterization it has been demonstrated that TiO(2) is incorporated on the Aurivillius structure. Interesting synergetic effect between TiO(2) and Bi(2)WO(6) leads to an improved charge carrier separation mechanism, causing the excellent photocatalytic performance under sunlike irradiation. The photocatalytic performance of Bi(2)WO(6) and Bi(2)WO(6)-TiO(2) was compared under different irradiation conditions and using increasing Rhodamine B concentration up to 25 ppm. After the photocatalytic analysis of both systems, the mineralization efficiency of the heterostructure appears significantly higher with respect to Bi(2)WO(6).
通过水热法合成了高效的 Bi(2)WO(6)-TiO(2) 异质结构，该异质结构在阳光照射下具有很高的罗丹明 B 降解光活性。从结构特征来看，TiO(2) 已被掺入到金红石结构中。TiO(2) 和 Bi(2)WO(6) 之间的有趣协同效应导致电荷载流子分离机制得到改善，从而在阳光照射下表现出优异的光催化性能。在不同的照射条件下，比较了 Bi(2)WO(6) 和 Bi(2)WO(6)-TiO(2) 的光催化性能，并使用高达 25 ppm 的罗丹明 B 浓度进行了递增实验。对两个体系进行光催化分析后，异质结构的矿化效率明显高于 Bi(2)WO(6)。
