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以内分泌干扰物阿特拉津为模型污染物,研究了TiO2-Fe3+可见光催化H2O2降解阿特拉津的协同效应.结果表明,在H2O2存在条件下,金红石TiO2经可见光激发可持续稳定地产生.OH自由基,在Fe3+协同作用下,.OH自由基生成量急剧增加;TiO2能可见光催化H2O2降解阿特拉津,金红石TiO2显示出较锐钛矿TiO2及混晶TiO2(TiO2P25)更高的催化活性,反应60 min,阿特拉津的降解率可达40%;以Fe3+协同TiO2可见光催化H2O2降解阿特拉津时,反应效率显著加快,反应5 min即对阿特拉津的降解率达到100%,而金红石TiO2显示出更为明显的协同效应.
The endocrine disruptor atrazine was used as model pollutant to study the synergistic effect of TiO2-Fe3 + visible light on the degradation of atrazine by H2O2.The results showed that rutile TiO2 could be produced sustainably and stably by visible light excitation in the presence of H2O2. OH radical. Under the synergistic action of Fe3 +, the radical generation of OH radical increased sharply. TiO2 could degrade atrazine by H2O2 and rutile TiO2 showed higher catalytic activity than anatase TiO2 and mixed TiO2 (TiO2P25) 60 min reaction rate, the degradation rate of atrazine was up to 40%. The reaction efficiency was remarkably accelerated with the combination of Fe3 + and TiO2 photocatalytic degradation of atrazine by H2O2. The degradation rate of atrazine at 5 min 100%, while rutile TiO2 shows a more pronounced synergistic effect.