以微球状氯氧化铋(BiOCl)为模板,合成了CuO/BiOCl异质结催化剂,利用扫描电子显微镜、X射线衍射仪、荧光分光光度计等对催化剂形貌和结构进行了表征;以亚甲基蓝(MB)为降解目标,探究了CuO与BiOCl物质的量比、MB染料初始质量浓度、催化剂质量、溶液pH等对CuO/BiOCl催化性能的影响,并研究了该催化剂的循环再生能力及光催化反应机理。结果表明:在可见光照射下,当CuO与BiOCl物质的量比为1∶15,催化剂质量为0.050g,MB初始质量浓度为25mg/L时,光催化效率最高,吸附过程符合一级动力学模型,且该催化剂具有良好的循环再生能力。在催化过程中空穴h+起主要作用,羟基自由基和超氧自由基均起次要作用。
CuO/BiOCl heterojunction catalysts were synthesized using microspherical BiOCl as a template,and the morphology and the structure were characterized by SEM,XRD and PL.MB dyes was acted as the degradation target,the influence of the molar ratio of CuO to BiOCl,the initial concentration of MB dye,the mass of the photocatalyst,and the pH of the solution on the photocatalytic performance of CuO/BiOCl was investigated.The recycling capacity and the photocatalytic mechanism were also studied.The results showed that under visible light irradiation,when the molar ratio of CuO to BiOCl was 1∶15 and as-prepared catalyst with the mass of 0.05g was applied to degrade 25mg/L MB,the photocatalytic efficiency was the highest.The adsorption process confirmed to the first-order kinetic,and the photocatalyst had good cyclic regeneration ability.Furthermore,holes h+ played a primary role in the photocatalytic process,while both the ·OH radicals and the superoxide radicals played a secondary role.
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基金资助
玉林市科学研究与技术开发计划项目(玉市科202324144,玉市科202324143)
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