A novel carbon modified Co₃O₄/BiVO₄ p-n heterojunction photocatalyst (Co₃O₄/BiVO₄/C) is prepared via one-step method. The Co₃O₄/BiVO₄/C photocatalyst is characterized by SEM, Raman, UV-vis DRS, electrochemical performance analysis and so forth. In addition, the optimum activity of the Co₃O₄/BiVO₄/C p-n heterojunction is higher than that of pure Co₃O₄ and BiVO₄ for the degradation of tetracycline under visible light. The improved photocatalytic property could be ascribed to the enhanced light absorption and the facilitated separation of photogenerated charge carriers through forming a p-n heterojunction. Furthermore, the Co₃O₄/BiVO₄/C has superior magnetic properties, recyclability and stability, which is conducive to practical application.

通过一步法制备了一种新型的碳改性Co ₃ O ₄ / BiVO ₄ pn异质结光催化剂（Co ₃ O ₄ / BiVO ₄ / C）。通过SEM，拉曼光谱，紫外可见DRS，电化学性能分析等对Co ₃ O ₄ / BiVO ₄ / C光催化剂进行了表征。另外，Co ₃ O ₄ / BiVO ₄ / C pn异质结的最佳活性高于纯Co ₃ O ₄和BiVO ₄的最佳活性。在可见光下降解四环素。改善的光催化性能可归因于通过形成pn异质结而增强了光吸收并促进了光生电荷载流子的分离。此外，Co ₃ O ₄ / BiVO ₄ / C具有优异的磁性能，可回收性和稳定性，有利于实际应用。