Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamilnadu, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Oct 15;81(1):739-44. doi: 10.1016/j.saa.2011.07.019. Epub 2011 Jul 8.
The photocatalytic degradation of a genotoxic azo dye Acid Violet 7 (AV 7) using ZnO as a photocatalyst in aqueous solution has been investigated under UV irradiation. The degradation is higher with UV/ZnO process than with UV/TiO(2)-P25 process at pH 9. The effects of different parameters such as pH of the solution, amount of catalyst, initial dye concentration and the influence of cations, anions and oxidants on photodegradation of AV 7 were analyzed. Addition of oxidants except H(2)O(2) has no significant effect on degradation. The degradation of AV 7 follows pseudo-first order kinetics according to the Langmuir-Hinshelwood model. The degradation of AV 7 has also been confirmed by COD and CV measurements.
采用 ZnO 作为光催化剂，在水溶液中，通过紫外光照射，研究了一种遗传毒性偶氮染料酸性紫 7（AV 7）的光催化降解。在 pH 值为 9 时，与 UV/TiO(2)-P25 工艺相比，UV/ZnO 工艺的降解率更高。分析了不同参数（如溶液的 pH 值、催化剂用量、初始染料浓度以及阳离子、阴离子和氧化剂对 AV 7 光降解的影响）的影响。除 H(2)O(2)外，添加氧化剂对降解没有显著影响。根据朗缪尔-欣谢尔伍德模型，AV 7 的降解符合准一级动力学。通过 COD 和 CV 测量也证实了 AV 7 的降解。
