Wide bandgap Bi2O2CO3-coupled Bi2MoO6 heterostructured hollow microspheres: one-pot synthesis and enhanced visible-light photocatalytic activity.
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.
Yang-Sen
YS
Xu
Yu-Xiang
YX
Yu
Wei-De
WD
Zhang
D001729:Bismuth / Q000737:chemistry*; D002254:Carbonates; D008863:Microspheres; D008982:Molybdenum / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D010782:Photolysis
D002254:Carbonates; D008982:Molybdenum; C028508:bismuth subcarbonate; D001729:Bismuth