▎ 摘　　要

Bismuth vanadate with reduced graphene oxide (BiVO4/RGO) is prepared via ultrafast, energy-efficient microwave-assisted hydrothermal technique. Subsequently, Ag3PO4 nanoparticles are decorated on BiVO4/RGO by impregnated solution process. Photoelectrochemical (PEC) performance is carried out using as-synthesized ternary heterostructure ms-BiVO4/RGO/Ag3PO4 nanohybrid photoanode film and Pt-wire as cathode in 0.5 m Na2SO4 electrolyte solution under AM 1.5 G (100 mW cm(-2)) irradiation. An enhanced photocurrent density of asymptotic to 3.6 mA cm(-2) at +1.23 V-RHE is observed for water oxidation, which is asymptotic to 2.3 times higher than pristine ms-BiVO4 (1.58 mA cm(-2)). Furthermore, 10.1% of incident light-to-photocurrent conversion at lambda = 450 nm and improved solar-to-hydrogen conversion efficiency of 4.5% with consistent photostability up-to 24 h is achieved. While Rhodamine-B dye degradation is investigated using BiVO4/RGO/Ag3PO4 photocatalyst, offers highest visible-light-driven photocatalytic (PC) degradation with average rate constant of k(avg) = 1.70 x 10(-1) min(-1) in 20 min, asymptotic to 4.3 times higher than pristine ms-BiVO4. Such enhancement in PEC and PC performances is due to improved light absorbance coefficient with extended hole diffusion length (L-PEC/PC = 209/147 nm) that enables efficient interfacial charge separation, transportation, and reduced photoinduced recombination. Herein, a strategy of designing an efficient nanohybrid photo(electro)catalyst to generate H-2 fuel from water oxidation process and for environmental remediation is developed.