A novel nano-dodecahedron Bi_0.5Y_0.5VO₄ solid solution with a diameter ranging from 20 to 50 nm has been prepared initially. The sample was characterized by XRD, SEM, HRTEM, element mapping, XPS, UV-vis spectrum, Raman spectra, Mott-Schottky and XPS valence band analysis to reveal its properties. Photocatalytic experiment exhibited that H-Bi_0.5Y_0.5VO₄ exhibited a much superior activity than the P-Bi_0.5Y_0.5VO₄ among overall water splitting. The enhanced twisting degree in hetero-Bi_0.5Y_0.5VO₄ (H-Bi_0.5Y_0.5VO₄), which reconstructed the internal electric field and thus promoting the photogenerated carriers migrating directionally to form the direct Z-scheme heterojunction, should be responsible for the improvement of the photocatalytic performances. Furthermore, it also contributed to the morphology edge formation, which could be another critical factor for improving the photocarriers separation efficiency after simulating the rules of charge distribution. Additionally, results also indicated that the co-catalysts [email protected]₂O₃ could unlock a new charge transfer channel in the procedure of photocatalytic overall water splitting.

最初制备了直径为20至50 nm的新型纳米十二面体Bi _0.5 Y _0.5 VO ₄固溶体。通过XRD，SEM，HRTEM，元素图谱，XPS，UV-vis光谱，拉曼光谱，Mott-Schottky和XPS价带分析对样品进行表征，以揭示其性质。光催化实验表明，在整个水分解过程中，H-Bi _0.5 Y _0.5 VO ₄表现出比P-Bi _0.5 Y _0.5 VO ₄更好的活性。杂Bi _0.5 Y _0.5 VO ₄（H-Bi _0.5 Y_0.5 VO ₄）可以重建内部电场，从而促进光生载流子定向迁移以形成直接的Z方案异质结，应负责改善光催化性能。此外，它还有助于形态学边缘的形成，这可能是在模拟电荷分布规则后提高光电载流子分离效率的另一个关键因素。此外，结果还表明，在光催化总水分解过程中，助催化剂[受电子邮件保护] ₂ O ₃可以解锁新的电荷转移通道。