Wide bandgap Bi2O2CO3-coupled Bi2MoO6 heterostructured hollow microspheres: one-pot synthesis and enhanced visible-light photocatalytic activity.
Wide bandgap Bi2O2CO3-coupled Bi2MoO6 heterostructured hollow microspheres: one-pot synthesis and enhanced visible-light photocatalytic activity.
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DOI：
10.1166/jnn.2014.8974
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发表时间：
2014-09
影响因子：
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通讯作者：
Yang‐Sen Xu;Yu-Xiang Yu-Yu-Xiang-Yu-15584148;Wei‐De Zhang
中科院分区：
文献类型：
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作者：
Yang‐Sen Xu;Yu-Xiang Yu-Yu-Xiang-Yu-15584148;Wei‐De Zhang
采用无模板溶剂热法成功制备了由Bi2O2CO3和Bi2MoO6纳米片组成的Bi2O2CO3/Bi2MoO6异质结构光催化剂。微球状Bi2O2CO3/Bi2MoO6复合材料对罗丹明B的降解具有优异的可见光催化活性，在Bi/Mo摩尔比为2.88/1的材料上，降解效率最高，在90 min内可降解99%的罗丹明B，而在纯Bi2MoO6微球上，罗丹明B的降解率仅为44%，在Bi2O2CO3纳米片上，罗丹明B的降解率仅为2%。Bi2O2CO3/Bi2MoO6光催化剂的光催化性能的显著增强可归因于高表面积和光诱导载流子在界面和半导体中的有效分离。结果表明，Bi2O2CO3/Bi2MoO6光催化剂中光生h+(VB)是光催化反应的主要活性物质。重要的是，Bi2O2CO3/Bi2MoO6对大肠杆菌具有可见光光催化活性（60分钟杀灭率为99.09）。此外，Bi2O2CO3/Bi2MoO6复合材料在反应过程中非常稳定，可以重复使用。这些特点意味着该异质结构光催化剂可用于环境修复和废水消毒。
Hierarchical Bi2O2CO3/Bi2MoO6 heterostructured photocatalysts composed of nanoplatelets of Bi2O2CO3 and Bi2MoO6 were successfully prepared by a facile template-free solvothermal process. The microsphere-like Bi2O2CO3/Bi2MoO6 composites exhibited superior visible light photocatalytic activity towards degradation of rhodamine B. The highest degradation efficiency was observed on the material with the Bi/Mo molar ratio of 2.88/1, which can degrade 99% rhodamine B within 90 min, while only 44% rhodamine B was degraded over the pure Bi2MoO6 microspheres and 2% over the Bi2O2CO3 nanoplatelets. The dramatic enhancement in their photocatalytic performance of the Bi2O2CO3/Bi2MoO6 photocatalysts can be attributed to the high surface area and the effective separation of the photoinduced carriers at the interfaces and in the semiconductors. The photo-generated h+(VB) in the Bi2O2CO3/Bi2MoO6 photocatalysts turn out to be the dominant active species in the photocatalytic reaction. Importantly, Bi2O2CO3/Bi2MoO6 displayed visible-light photocatalytic activity for the destruction of E. coli (the percent kill is 99.09 in 60 min). In addition, the Bi2O2CO3/Bi2MoO6 composite was very stable during the reaction and can be used repeatedly. These features mean the present heterostructured photocatalyst can be applied in environmental remediation, and waste water disinfection.