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BiVO4, a visible-light response photocatalyst, has shown tremendous potentialbecause of abundant raw material sources, good stability and low cost. Thereexist some limitations for further applicaitions due to poor capability toseparate electron-hole pairs. In fact, a single-component modification strategyis barely adequate to obtain highy efficient photocatalytic performance. Inthis work, P substituted some of the V atoms from VO4 oxoanions, namely P wasdoped into the V sites in the host lattice of BiVO4 by a hydrothermal route.Meanwhile, Ag as an attractive and efficient electron-cocatalyst wasselectively modified on the (010) facet of BiVO4 nanosheets via facilephoto-deposition. As a result, the obtained dually modified BiVO4 sheetsexhibited enhanced photocatalytic degradation property of methylene blue (MB).In detail, photocatalytic rate constant (k) was 2.285 min-1g-1, which was 2.78times higher than pristine BiVO4 nanosheets. Actually, P-doping favored theformation of O vacancies, led to more charge carriers, and facilitatedphotocatalytic reaction. On the other hand, metallic Ag loaded on (010) faceteffectively transferred photogenerated electrons, which consequently helpedelectron-hole pairs separation. The present work may enlighten new thoughts forsmart design and controllable synthesis of highly efficient photocatalyticmaterials.

Highly efficient BiVO4 single-crystal nanosheets with dual modification: phosphorus doping and selective Ag modification