Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamilnadu, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Dec;98:460-5. doi: 10.1016/j.saa.2012.08.079. Epub 2012 Aug 31.
Under UV-A light illumination, formation of iodine from iodide ion on the surfaces of anatase TiO(2), ZnO, Fe(2)O(3), CeO(2), MoO(3), Bi(2)O(3), and Nb(2)O(5) increases with the concentration of iodide ion, airflow rate and light intensity and conform to the Langmuir-Hinshelwood kinetic model. Measurement of the particle size of the semiconductor oxides by light scattering method and deduction of the same from the determined specific surface area show that the oxide particles agglomerate in suspension. However, mixtures of any two listed particulate semiconductors do not show enhanced photocatalytic formation of iodine indicating absence of interparticle charge transfer. The results are rationalized.
在 UV-A 光照射下，锐钛矿 TiO(2)、ZnO、Fe(2)O(3)、CeO(2)、MoO(3)、Bi(2)O(3)和 Nb(2)O(5)表面上的碘离子形成碘，其浓度、气流速率和光强的增加符合朗缪尔-欣谢尔伍德动力学模型。通过光散射法测量半导体氧化物的颗粒大小，并从确定的比表面积推断出，氧化物颗粒在悬浮液中团聚。然而，列出的任何两种颗粒状半导体的混合物并没有显示出增强的光催化碘形成，表明不存在颗粒间电荷转移。结果得到了合理的解释。
