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Hierarchically Z-scheme photocatalyst of Ag@AgCl decorated on BiVO4 (0 4 0) with enhancing photoelectrochemical and photocatalytic performance

2015; Elsevier BV; Volume: 170-171; Linguagem: Inglês

10.1016/j.apcatb.2015.01.043

1873-3883

Hongyan Li, Yingjuan Sun, Bin Cai, Shiyu Gan, Dongxue Han, Li Niu, Tongshun Wu,

Gas Sensing Nanomaterials and Sensors

Crystal facet dependence, as the crucial factor for semiconductor photocatalysis, is a significant strategy for optimizing the reactivity of photocatalyst. Given that there is a strong correlation between crystal facet and photocatalytic activity, we herein designed the Ag@AgCl core–shell structure decorated on (0 4 0) crystal facet of BiVO4 (Ag@AgCl/BiVO4) as a hierarchical Z-scheme photocatalytic system by a simple route. In this hybridization system, the metallic Ag species not only act as the solid-state electron mediator, but can also absorb the photons from incident light and present the SPR-effect. As expected, such Ag@AgCl/BiVO4 heterostructure exhibits highly efficient photocatalytic performance and the first-order kinetic constant of photodegradation of Rhodamine B (RhB) is 300 times of pristine BiVO4. Moreover, by means of the EIS, LSV and I-t measurements, the Ag@AgCl/BiVO4 heterostructure also presents extraordinary photoelectrochemical performance. Focus is then given toward a novel perspective for understanding the mechanism of interfacial charge transfer of photocatalytic on the basis of the BiVO4-based all-solid-state Z-scheme photocatalyst. This work is expected to open up new insights into the architectural design of novel Z-scheme photocatalysts with high photoactivity and further utilization in the field of environmental or energy.