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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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简单低温水浴法合成鳞片状氧化铜/四针状氧化锌晶须复合光催化剂
DOI: 10.1016/S1872-2067(14)60198-4, PP. 1997-2005
Keywords: 鳞片状氧化铜,聚乙二醇,氧化铜/四针状氧化锌晶须,光催化降解,亚甲基蓝,甲基橙
Abstract:
？以硝酸铜为原料,聚乙二醇(PEG,Mw=400)为稳定剂和模板剂,采用简单的低温水浴合成法成功合成了四针状氧化锌晶须(T-ZnOw)表面负载鳞片状CuO的纳米复合光催化剂,系统研究了复合催化剂样品的晶体结构和形貌,通过荧光发光光谱(PL)和紫外光照射的条件下样品对阳离子污染物(亚甲蓝,MB)和阴离子污染物(甲基橙,MO)的光催化降解效率表征了样品的光催化性能,同时采用ICP-AES详细分析了PEG400浓度对T-ZnOw表面负载CuO纳米颗粒数量的影响.结果表明,T-ZnOw表面有序地沉积了大量鳞片状CuO纳米颗粒,随着PEG400浓度增加,T-ZnOw表面沉积的CuO纳米片数量逐渐增多,且CuO纳米片在T-ZnOw表面的排列更加有序.同时,PEG400浓度的变化对合成样品特征发光峰的强度也有一定影响,当PEG400浓度小于0.60mol/L时,合成样品特征发光峰强度随着PEG400浓度增大而减小;当PEG400浓度大于0.60mol/L时,样品的特征发光峰强度随之有所增加.在紫外光照射条件下,CuO/T-ZnOw纳米复合催化剂样品对MB和MO水溶液的降解均表现出优异的光催化活性,当PEG400浓度≤0.60mol/L时,样品的光催化活性随着PEG400浓度的增大而增加;而当PEG400浓度大于0.60mol/L时,样品的光催化活性反而有所降低.此外,在相同条件下,所有样品对MB水溶液的降解效率明显高于对MO水溶液的降解效率.
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