三维WO3/rGO复合物的制备及光解水制氢性能研究

通过水热法制备出WO₃/rGO复合物用于可见光下光解水制氢。采用XRD和SEM表征手段对复合物组成、形貌进行研究,同时进行光解水制氢性能测试并对其机理进行探讨。研究结果表明,WO₃样品呈海草状,具有丰富的空隙,可以更大程度上提升光解水制氢性能,WO₃/rGO复合物与未复合石墨烯的WO₃样品比较,其形貌没有明显变化。并且还原氧化石墨烯(rGO)的导电性在提高光感应电荷载流子分离效率中也起着关键作用。WO₃/rGO复合物产氢速率为236μmol/h,而WO₃样品的产氢速率为212μmol/h,氧化石墨与WO₃复合后样品对光解水制氢性能得到提升。增强的光解水制氢性能归因于rGO的优异电导率和WO₃/rGO复合物纳米结构的协同作用。

Preparation of Three-dimensional WO/rGO Composite and Its Performance for Photocatalytic Water Splitting

WO₃/rGO composite was prepared by hydrothermal method for photocatalytic water splitting under visible light.Its composition and morphology were confirmed by XRD and SEM.The performance of photocatalytic water splitting was tested and its mechanism was discussed.The WO₃ sample was like seaweed and had abundant voidage, which could improve the hydrogen production performance of photolysis water to a greater extent.The morphology of WO₃/rGO composite was not significantly changed compared with the WO₃ sample of uncompounded graphene.The conductivity of rGO also plays a key role in improving the efficiency of photoinduced charge carrier separation.The hydrogen production rate of WO₃/rGO composite was 236 μmol/h, while the hydrogen production rate of WO₃ sample was 212 μmol/h.The enhanced hydrogen production performance is attributed to the synergistic effect of rGO′s excellent conductivity and the nanostructure of WO₃/rGO complexes.