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在450W高压汞灯照射及聚对苯二磺酰氧基苯基卟啉钴存在下,考察了亚甲基蓝降解过程中紫外可见吸收光谱的变化,研究了空气光催化降解亚甲基蓝水溶液反应的动力学.实验结果表明,亚甲基蓝可迅速降解,并且符合一级动力学过程,其表观动力学常数K=035435h-1,半衰期t1/2=196h.经光催化降解后,亚甲基蓝水溶液脱色率可达574%;其COD浓度降低431%.太阳光具有与高压汞灯相似的作用,这为以金属卟啉作光敏剂进行太阳能转化、贮能提供很大的应用潜能.光催化剂具有较好的光稳定性,可回收利用,而且反应结束后可自动沉降,避免二次污染.初步实验结果表明,该方法是一种具有应用前景的水处理方法
In the presence of 450W high pressure mercury lamp and poly (P-phenylene-sulfonyloxyphenyl) porphyrin cobalt, the UV-vis absorption spectra of methylene blue during degradation were investigated. The kinetics of photocatalytic degradation of methylene blue in aqueous solution was studied. The experimental results show that methylene blue can degrade rapidly and accord with the first-order kinetic process. The apparent kinetic constant K = 035435h-1 and the half-life t1 / 2 = 196h. After photocatalytic degradation, methylene blue aqueous solution decolorization rate of up to 57 4%; its COD concentration decreased 43 1%. Sunlight has a similar role with high-pressure mercury lamp, which is to use metalloporphyrin as a photosensitizer for solar energy conversion, energy storage provides great potential. Photocatalyst has good light stability, recyclable, and the reaction can be automatically settled after the end to avoid secondary pollution. The preliminary experimental results show that the method is a promising water treatment method