In this report, two-dimensional (2D) bismuth selenide (Bi2Se3) nanosheets (NSs) and reduced graphene oxide (rGO) (Bi₂Se₃/rGO) composites have been prepared via a hydrothermal method. The microstructures and morphology properties of Bi₂Se₃/rGO composites were analyzed by scanning electron microscopy (SEM) and Raman spectra, indicating a well prepared and high crystalline material. Photoelectrochemical (PEC) tests demonstrate that Bi₂Se₃/rGO heterojunction exhibits enhanced photocatalytic performance of the pure Bi₂Se₃, which is about five times higher than Bi₂Se₃ NSs, which is because rGO acts as a conduction pathway, resulting in efficient separation of photogeneration of electron–hole pairs on the Bi₂Se₃/rGO composites. The as-prepared composite provides a novel insight in the field of photocatalysis.

在本报告中，二维 (2D) 硒化铋 (Bi2Se3) 纳米片 (NSs) 和还原氧化石墨烯 (rGO) (Bi ₂ Se ₃ /rGO) 复合材料已通过水热法制备。通过扫描电子显微镜（SEM）和拉曼光谱分析了Bi ₂ Se ₃ /rGO 复合材料的微观结构和形貌特性，表明是一种制备良好的高结晶材料。光电化学 (PEC) 测试表明 Bi ₂ Se ₃ /rGO 异质结表现出增强的纯 Bi ₂ Se _{3 的}光催化性能，比 Bi ₂ Se ₃高约五倍NSs，这是因为 rGO 作为传导通路，导致 Bi ₂ Se ₃ /rGO 复合材料上电子-空穴对的光生有效分离。所制备的复合材料为光催化领域提供了新的见解。