Bi_(4)Ti_(3)O_(12)/CuBi_(2)O_(4)复合材料的制备及其光催化性能

Preparation of Bi_(4)Ti_(3)O_(12)/CuBi_(2)O_(4) composite material and their photocatalytic performance

通过水热法制备Bi_(4)Ti_(3)O_(12)和CuBi_(2)O_(4)纳米复合材料,并通过原位生长法将两种材料复合。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见分光光谱(UV-Vis)、X射线光电子能谱技术(XPS)、荧光光谱仪、电化学工作站等分析方法研究了纳米复合材料的物相组成、微观形貌及相应的光学性质。使用饱和甘汞电极、铂丝电极以及Bi_(4)Ti_(3)O_(12)/CuBi_(2)O_(4)光电极构建三电极体系,表征复合材料的瞬态光电流响应能力。通过降解罗丹明B,评估染料降解速率,分析复合材料的光催化性能。结果表明,与CuBi_(2)O_(4)进行复合有利于提升Bi_(4)Ti_(3)O_(12)单体的性能,CuBi_(2)O_(4)的质量分数为15%时降解效率可达66.8%,表现出优异的光催化性能。

Bi_(4)Ti_(3)O_(12) and CuBi_(2)O_(4) nanocomposites were prepared by hydrothermal method and the two materials were composited by in-situ growth method.The physical phase composition,microscopic morphology and corresponding optical properties were investigated by X ray diffractometer(XRD),scanning electron microscope(SEM),Ultraviolet-visible spectroscopy(UV-Vis),X ray photoelectron spectroscopy(XPS),fluorescence spectrometer,and electrochemical workstation,and other analytical means.The saturated mercury electrode,platinum wire electrode,and Bi_(4)Ti_(3)O_(12)/CuBi_(2)O_(4) photoelectrode were used to construct a three-electrode system to characterize the transient photoelectric current response ability of the composite material.The photocatalytic properties of the composites were analyzed by degrading rhodamine B(RhB)and evaluating the dye degradation rate.The results showed that the composite with CuBi_(2)O_(4) was conducive to enhancing the performance of Bi_(4)Ti_(3)O_(12) monomer,i.e.,the degradation efficiency could reach 66.8%when the mass fraction of CuBi_(2)O_(4) was 15%,which exhibited excellent photocatalytic performance.