Novel visible-light-driven Fe2O3/Ag3VO4 composite with enhanced photocatalytic activity toward organic pollutants degradation

作者：Xu, Yuanguo; Jing, Liquan; Chen, Xiao; Ji, Haiyan; Xu, Hui^*; Li, Hongping; Li, Huaming; Zhang, Qi

来源：RSC Advances, 2016, 6(5): 3600-3607.

DOI：10.1039/c5ra22912j

• PHOTODEGRADATION ACTIVITY
• HYDROTHERMAL SYNTHESIS
• RHODAMINE-B
• EFFICIENT
• ALPHA-FE2O3
• FABRICATION
• STABILITY
• OXIDATION
• NANOSTRUCTURES
• HETEROJUNCTION

In this study, a new type of high-performance visible light photocatalyst Fe2O3/Ag3VO4 was prepared by a two-step method. Fe2O3 was prepared by a solvothermal method first and then the Fe2O3/Ag3VO4 photocatalyst was synthesized with different mass ratios by a simple chemical precipitation method. Powder X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy dispersive spectrometry (EDS), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), UV-vis absorption spectroscopy (in DRS mode), and electrochemical impedance spectroscopy (EIS) were applied to characterize the as-prepared samples. The results showed that the as-prepared photocatalyst was uniform in the shape of particles. Photocatalytic properties of the as-prepared samples were evaluated by degrading RhB under visible light. The results showed that 1% Fe2O3/Ag3VO4 composite presented the highest photocatalytic activity. After 60 min, 96.1% of RhB was degraded by 1% Fe2O3/Ag3VO4 composite. Finally, trapping experiments confirmed that the hole (h(+)) and superoxide free radical (center dot O-2(-)) were the main active species in degrading RhB.

• 出版日期2016
• 单位海南大学; 江苏大学