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Recent advancements in the formation of isotype heterojunction photocatalysts constructed by mixed-phase BiVO4 for energy and environmental applications
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DOI：10.1016/j.cattod.2026.115881.png)
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Abstract
En 中文
The simultaneous escalation of global energy demand and environmental pollution highlights the urgent need for solar-driven technologies capable of addressing both clean energy conversion and organic pollutant degradation. Visible-light-responsive semiconductor photocatalysts have emerged as promising candidates, with BiVO₄ standing out due to its narrow band gap, chemical stability, and strong oxidative capability. However, its photocatalytic efficiency remains hindered by short charge-carrier diffusion lengths, low electron mobility, and substantial recombination losses. While conventional heterojunctions with other semiconductors can improve charge separation, their lattice mismatch and limited interfacial compatibility impose constraints on long-term performance and charge-transfer efficiency. Isotype heterojunction has recently gained attention as an effective way to improve charge separation, adjust band alignment, and better control defects. Mixed-phase BiVO₄ systems, particularly monoclinic and tetragonal combinations, have demonstrated enhanced light harvesting, reduced recombination, and increased photocatalytic activity for pollutant degradation and water oxidation. This review presents an integrated perspective linking BiVO₄ polymorph-dependent properties, homojunction–heterojunction comparisons, and rational preparation strategies for mixed-phase homoepitaxial systems, alongside detailed insights into charge transfer mechanisms (Type II and Z-scheme) and quantitative performance enhancement across energy and environmental applications.
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