CuO-CeO_2/ZSM-5催化剂的制备及其降解酸性大红GR的研究

Study on preparation of CuO-CeO_2/ZSM-5 catalyst and its degradation performance on acid brilliant scarlet GR

采用浸渍法制备了Cu O-CeO_2/ZSM-5催化剂,通过XRD、SEM、BET等手段对催化剂物相及微观形貌进行表征,并通过对降解酸性大红模拟废水的降解实验,考察了反应温度、双氧水用量、溶液p H等因素对催化剂光催化活性的影响,并探讨了其光催化降解反应机制。结果表明:Ce的加入不仅可以使活性组分分散更均匀,还能降低光催化反应中电子-空穴对的复合速率,在反应时间为90 min,催化剂用量为0.2 g,反应温度为70℃,p H=4,双氧水用量为0.5 m L的条件下,光降解效果最佳,COD去除率可达99.82%。

CuO- Ce O2/ ZSM- 5 catalyst was prepared by impregnation method and characterized by X-ray diffraction（ XRD）,scanning electron microscope（ SEM） and brunauer-emmett-teller analysis（ BET） in order to investigate the effects on phase formation and morphology. The photocatalytic activity of catalyst was investigated under UV for acid brilliant scarlet GR degradation,the effects of various operating parameters,such as reaction temperature,hydrogen peroxide concentration,initial p H on the removal of wastewater and photocatalytic degradation reaction mechanism,were studied. The results showed that the addition of cerium can not only make the active component more uniform but also reduce the recombination rate of electron hole pair. Under the optimized condition of reaction time of 90 min,the catalyst dosage of 0. 2 g,reaction temperature of 70 ℃,p H value of 4,and hydrogen peroxide concentration of 0. 5 m L,the maximum photocatytic degradation was up to 99. 82%.