This research demonstrates improved photocatalytic degradation in dyes and hydrogen evolution in the BiVO4/WO3 hybrid system, suggesting promising environmental and energy applications.
Dual functional heterostructure of Bismuth vanadate and Tungsten trioxide (BiVO4/WO3) was developed and its use in the generation of hydrogen and the degradation of dyes was shown. BiVO4 was synthesized by the sol gel method, and its heterostructure with WO3 was created by the solvothermal method. To study the morphological, structural, and optical characteristics of BiVO4 and BiVO4/WO3, X-Ray diffraction (XRD), Field emission scanning electron microscope (FESEM), UV-visible spectroscopy (UV Vis), Raman spectroscopy and X-Ray photoelectron spectroscopy (XPS) was performed. Using Electrochemical Impedance Spectroscopy (EIS) and Linear Sweep Voltammetry (LSV), the electrochemical characteristics were ascertained. When exposed to visible light, BiVO4 alone demonstrated a 73.4% degradation efficiency for methylene blue; however, the hybrid system yielded an 87.2% degradation efficiency. In the presence of 1M KOH solution an increase in current density and a lower value of onset potential (0.388 V vs RHE) was observed for the BiVO4/WO3. Similarly, EIS indicated a decrease in charge transfer resistance (83.92K Ω) in the case of hybrid. Better performance from the hybrid system in HER further presented its capacity to both clean up the environment and produce energy from renewable sources.
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Rana et al. (2024) studied this question.
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