【摘要】 考察过渡金属离子对TiO2 光催化活性的影响 ,并对过渡金属离子对催化剂TiO2 的光催化调变作用机理进行了初步探讨。结果表明 ,加入Cu(Ⅱ )可以大大提高TiO2 的光催化活性 ,反应 75min ,可使活性艳蓝X -BR的CODCr的去除率达 75 %以上 ,对于活性艳红X -3B和活性艳黄X -6G的CODCr的去除率达到 90 %以上。过渡金属离子的调变作用是由于低价的金属离子与H2 O2 作用生成·OH自由基所致更多还原

【Abstract】 This study focused on the effect of the dissolved transition metal ions on the photocatalytic oxidation in aqueous titanium dioxide suspensions and discussed the mechanism.The results indicated that the adding of a little amount of Cu(Ⅱ) can raise the photocatalytic oxidation efficiency,and the COD Cr degradation of reactive red X-3B and reactive yellow X-6G is up to 90% and that of reactive blue X-BR is up to 75%,after reaction time of 75min.The improvement of the transition metal ions is due to product of ·OH free radical from reaction of transition metals and H 2O 2.更多还原