采用氢氧化钠快速共沉淀法制备了Ce掺杂ZnO,以模拟日光催化降解罗丹明B为指标,优化Ce掺杂比例及煅烧温度,考察催化剂套用稳定性和适用性,最后对Ce掺杂ZnO活性机理进行分析。结果表明:Ce最佳掺杂摩尔分数为3%,500℃煅烧2h,对1.0×10-5mol/L罗丹明B溶液40min降解率达到93.8%,6次套用降解率达到90%以上,对仲夏自然阳光和其他染料均有良好的适用性。Ce掺杂降低了光致空穴-电子复合率,有效的提升了光催化活性。
A type of cerium doped zinc oxide nano-scale catalyst was prepared by rapid coprecipitation method with sodium hydroxide.The doping ratio of cerium and calcination temperature were optimized by photocatalytic degradation of rhodamine B under simulated solar irradiation,and the stability and applicability of catalyst were investigated.Finally,the activity mechanism of Ce-doped ZnO was analyzed.The results indicated that the optimum amount of substance ratio of cerium was 3%,followed by calcining at 500℃ for 2h.The degradation rate reached to 93.8% in 40min when applied to 1.0×10-5mol/L RhB solution,and it was kept above 90% even after 6 cycles.Meanwhile,with good applicability to natural sunlight irradiation and other dyes.Cerium doping reduced the photo induced hole-electron recombination rate and enhanced the photocatalytic activity efficiently.
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基金资助
浙江省分析测试科技计划项目(2018C37046);浙江省“生物工程”一流学科项目(ZS2017007);浙江万里学院2018年课堂教学改革项目(kg2018014)
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