Yang Jun, Zhang Ping, Liu Lian, Zeng Qing-Fu
Engineering Research Center for Clean Production of Textile Printing and Dyeing, Ministry of Education, Wuhan Textile University, Wuhan 430073, China.
Huan Jing Ke Xue. 2011 Nov;32(11):3365-71.
Different wavelengths of UV light source were studied for the degradation of reactive brilliant red X-3B to reveal the function of wavelengths in photo-catalytic oxidation. The results showed that there were simultaneous photo-oxidation and photo-catalytic oxidation reactions for reactive brilliant red X-3B under ultraviolet light irradiation (254 nm), while under ultraviolet light irradiation (365 nm), there were only photo-catalytic reactions. The degradation of X-3B followed apparent first-order kinetics under 365 nm ultraviolet light irradiation, it also could be depicted by formulation of L-H model more precisely, while under 254 nm ultraviolet light irradiation, it followed apparent second-order kinetics. Compared with the degradation half-life of 365 nm light, the degradation half-life of brilliant red X-3B in 254 nm light decreased from 37.263 min to 0.855 min, indicating that the light quantum efficiency of short-wave UV was higher than that of the long-wave UV.
研究了不同波长的紫外光源对活性艳红X-3B的降解情况，以揭示波长在光催化氧化中的作用。结果表明，在紫外光（254 nm）照射下，活性艳红X-3B同时发生光氧化和光催化氧化反应，而在紫外光（365 nm）照射下，仅发生光催化反应。在365 nm紫外光照射下，X-3B的降解遵循表观一级动力学，用L-H模型公式描述更为精确，而在254 nm紫外光照射下，其遵循表观二级动力学。与365 nm光的降解半衰期相比，活性艳红X-3B在254 nm光下的降解半衰期从37.263 min降至0.855 min，表明短波紫外光的光量子效率高于长波紫外光。
