Cr(VI)具有致癌性和高流动性，发展经济有效且环保的方法处理含Cr(VI)废水是冶金行业所面临的重要挑战。本项目提出以原位自组装的p-CuBi2O4进行光电催化还原Cr(VI)来应对上述挑战，揭示制备工艺对CuBi2O4成分、结构以及形貌的调控方法，阐述其对光学、电学以及光电化学性能的影响机制。结合多种光谱表征和光电化学分析手段，探究CuBi2O4光电催化还原Cr(VI)过程中的限制性步骤和表面化学组分和晶体结构的改变，分析制约CuBi2O4光电催化效率和稳定性的关键性因素。依据关键性因素对CuBi2O4光电极进行掺杂、表面修饰或两者协同作用，研究其对光电性能和稳定性的作用原理，总结设计依据，开发光电催化还原Cr(Ⅵ)用高效稳定的CuBi2O4光阴极。项目成果对于开发新型光电催化电极材料，解决当前水体污染治理问题，开辟环境治理的新途径具有十分重要的理论与实际指导意义。

Cr(VI) is carcinogenic with high mobility in water, and developing a cost-effective and environmentally friendly method for treating Cr(VI)-containing wastewater is an important challenge for the metallurgical industry. In this project, photoelectrochemical reduction of Cr(VI) by in-situ self-assembled p-CuBi2O4 was proposed to meet the above challenges. The effect of preparation process on the composition, structure and morphology of CuBi2O4 was revealed, and that of its optical, electrical and photoelectrochemical properties were described. Combining various spectral characterization and photoelectrochemical analysis methods, the limiting step and the change of surface chemical composition and crystal structure of CuBi2O4 in the process of photoelectrocatalytic reduction of Cr(VI) were investigated. The key factors which limiting the photoelectrochemical efficiency and stability of CuBi2O4 were analyzed. According to the key factors, the CuBi2O4 photoelectrode was doped, surface modified or synergistically modified, and its impact on photoelectrochemical performance and stability was studied. The design basis was summarized to develop highly efficient and stable CuBi2O4 photocathode for photoelectrocatalytic reduction of Cr(VI). The results of this project would have important theoretical and practical guidance for the development of new photoelectrochemical electrode materials, solving the current water pollution problems, and opening up new ways of environmental governance.