标题：Hydrothermal synthesis of C3N4/BiOIO3heterostructures with enhanced photocatalytic properties
作者：Wang, Wenjun ;Cheng, Hefeng ;Huang, Baibiao ;Liu, Xiaolei ;Qin, Xiaoyan ;Zhang, Xiaoyang ;Dai, Ying
作者机构：[Wang, Wenjun ;Cheng, Hefeng ;Huang, Baibiao ;Liu, Xiaolei ;Qin, Xiaoyan ;Zhang, Xiaoyang ] State Key Laboratory of Crystal Materials, Shandong Univer 更多
来源：Journal of Colloid and Interface Science
摘要：The C3N4/BiOIO3composites with heterostructures have been fabricated by simply depositing BiOIO3on the surface of C3N4at hydrothermal conditions, using bismuth nitrate and potassium iodate as precursors. C3N4is an excellent organic semiconductor, which can be excited by visible light. BiOIO3is a layered bismuth-based compound that has an internal polar field. Coupling C3N4with BiOIO3can combine the advantages of the two compounds and obtain better photocatalytic properties. X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Fourier transformation infrared spectra have been carried out to confirm the structures and morphologies of as-prepared products. The absorption properties have been characterized by diffuse reflectance spectra and the photocatalytic activities have been evaluated by photodegradation of methyl orange, Rhodamine B and 2,4-dichlorophenol. Compared with C3N4, all C3N4/BiOIO3composites exhibit better visible-light-driven photocatalytic properties. It is a synergetic effect that enables the composites to harvest light and promote charge separation, which eventually leads to the enhancement of the photocatalytic efficiencies. Under UV-vis light irradiation, C3N4/BiOIO3composites also exhibit better activities, and the charge transfer process is similar to a redox mediator-free Z-scheme system.
© 2014 Elsevier Inc.