Liu Ting, You Hong, Chen Qi-Wei, Wang Zhi-Chao
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Huan Jing Ke Xue. 2009 Sep 15;30(9):2560-4.
The Fe2O3/TiO2/Al2O3 catalyst was prepared by using TiO2/Al2O3 as carrier and the heterogeneous photo-Fenton system was established in the three-phase fluidized bed. A fluorescence technique was developed for the determination of the hydroxyl radicals (*OH) from the heterogeneous photo-Fenton system, using coumarin as the fluorescence probe. In addition, four main factors, namely pH, H2O2 concentration, catalyst loading and UV light intensity, which could influence the concentration of OH produced during the reaction process, was also discussed. The fluorescence method using coumarin as the fluorescence probe was demonstrated to be capable of detecting *OH generated in heterogeneous photo-Fenton system with veracity and high reproducibility. It was also found that the *OH generated in heterogeneous photo-Fenton system conformed to the zero reaction dynamics in 30 min. Moreover, the pH, H2O2 concentration, catalyst loading and UV light intensity influenced the *OH generated during the reaction process.
以TiO2/Al2O3为载体制备了Fe2O3/TiO2/Al2O3催化剂，并在三相流化床中建立了非均相光芬顿体系。以香豆素为荧光探针，开发了一种荧光技术用于测定非均相光芬顿体系中的羟基自由基（OH）。此外，还讨论了pH值、H2O2浓度、催化剂负载量和紫外光强度这四个主要因素对反应过程中产生的OH浓度的影响。结果表明，以香豆素为荧光探针的荧光方法能够准确、高重现性地检测非均相光芬顿体系中产生的OH。还发现非均相光芬顿体系中产生的OH在30分钟内符合零级反应动力学。此外，pH值、H2O2浓度、催化剂负载量和紫外光强度影响反应过程中产生的OH。
