复合纳米Fe2O3/TiO2可见光催化降解邻甲酚溶液的研究

以复合纳米Fe2O3／TiO2作为催化剂，日光色镝灯为光源，研究了邻甲酚溶液的可见光降解。考察了催化剂制备方法、催化剂使用量、溶液pH、催化剂重复使用等条件对可见光降解的影响。实验结果表明，1％Fe2O3／TiO2（n）对邻甲酚溶液的可见光降解效果最优，比Ti02（p25）的降解率提高了2．6倍。在实验条件下，可见光降解3h，邻甲酚溶液的浓度去除率达95．4％，TOC去除率为72．3％。在较宽的浓度范围内，邻甲酚的反应服从一级动力学反应方程，随着浓度的增大，反应速率常数不断降低。

Composite photocatalyst Fe2 O3/TiO2 treatment of o-cresol solution by photocatalysis oxidation

Photocatalysis degradation of o-cresol was studied using Fe_2O_3/TiO_2 nanoparticles as photocatalyst and reflector sunlight dysprosium lamp as light source. The effects of preparation methods, reusability of the catalyst, catalyst content, solution pH and o-cresol initial concentration were examined. The tests show that using 1% Fe_2O_3/TiO_2 nanoparticles prepared by impregnation method as photocatalyst can increase o-cresol gradation rate by 2.6 times on comparison with TiO_2(P25)nanoparticles. Under experimental conditions, the concentration removal rate of o-cresol is 95.4% and the TOC removal rate is 72.3% after photogradation of 3 h. When the concentration of o-cresol in a wider range, reaction fitted the fist-order kinetics and the reaction speed constant decreases with increasing concentration.