自支撑型类Fenton催化剂的制备及其降解氯酚污染物的研究

利用自支撑型金属-有机骨架催化剂的合成策略，设计合成系列含Fe-N2O2络合物结构单元的自支撑型类Fenton催化剂，扩大该氧化体系的光响应范围，拓宽催化剂使用的pH值范围。研究该氧化体系对典型难降解氯酚类污染物（2,4,6-TCP、2,4-DCP、2-CP和PCP）的降解性能。探讨催化剂加入量、pH值、 双氧水使用量等因素对氯酚类有机污染物降解效率的影响，优化操作条件，筛选出高稳定性、高活性的自支撑型类Fenton催化剂。通过中间产物的变化及降解过程中氧化物种的测定,研究自支撑型类Fenton体系降解氯酚类有机污染物的机理。

According to the synthetic strategy of metal-organic frameworks, we shall design and synthesize a series of self-supported Fenton-like catalysts. The ranges of the pH- and photo-responses will be enlarged for the designed Fenton-like oxidation system. The degradation for the chlorophenols, such as 2,4,6-TCP, 2,4-DCP, 2-CP and PCP, will be studied. The effects of quantity of catalyst, pH value and the utilization of H2O2 on the degradation of the chlorophenols will be investigated in detail. Through adjusting the reaction conditions, some self-supported Fenton-like catalysts with high stability and high activity will be obtained. According to the change of intermediates and the determination of oxidation species during the degradation of the chlorophenols, the possible mechanism will be clarified.