标题：ZnWO4/BiOI heterostructures with highly efficient visible light photocatalytic activity: the case of interface lattice and energy level match
作者：Pan Li;Xian Zhao;Chun-jiang Jia
作者机构：[Li, P] School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;[ Zhao, X] State Key Laboratory of Crystal Materials, S 更多
通讯作者地址：[Li, P]Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.
来源：Journal of Materials Chemistry, A. Materials for energy and sustainability
摘要：ZnWO4/BiOI heterostructures with different constituents are synthesized via a chemical bath approach under mild conditions by tuning the Zn/Bi molar ratios. The obtained ZnWO4/Bi0l heterostructures display high photocatalytic activities in degradation of MO and photocurrent response under visible light irradiation. Combining the experimental findings, first-principles calculations are used to investigate the surface geometry structures and the work functions of the (011) and (010) surfaces of the ZnWO4 phase and the (001) surface of the BiOI phase. The results show that the lattice and energy levels between the ZnWO4 and BiOI phases match well with each other to be capable of forming efficient ZnWO4/BiOI p-n heterojunction structures. This match promotes the separation and transfer of photoinduced electron-hole pairs at the interface, resulting in the excellent photocatalytic performance of the ZnWO4/BiOI heterostructures. Our findings show that the formation of a heterostructure would possess the excellent photocatalytic activities only if the lattice and energy level match between the two semiconductors was satisfied, which is of great importance for designing and developing more efficient heterostructured photocatalysts.