Visible-light-driven MIL-53(Fe)/BiOCl composite assisted by persulfate: Photocatalytic performance and mechanism
Miao, SC (Miao, Shengchao)[ 1 ] ; Zha, ZX (Zha, Zhenxing)[ 1 ] ; Li, Y (Li, Ying)[ 1 ] ; Geng, XX (Geng, Xinxiang)[ 1 ] ; Yang, JH (Yang, Jiahui)[ 1 ] ; Cui, SH (Cui, Shihai)[ 1,2 ]*（崔世海） ; Yang, J (Yang, Jing)[ 1 ]*（杨静）
[ 1 ] Nanjing Normal Univ, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Coll Chem & Mat Sci,Jiangsu Key Lab Biomed Mat, 1 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China
[ 2 ] Nanjing Lvshiyuan Environm Protect Technol Co LTD, 108 Ganjiabiandong Rd, Nanjing 210033, Jiangsu, Peoples R China
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,201907,380, 111862
The novel semiconductor heterojunction of MIL-53(Fe)/BiOCl composite was first prepared through the solvothermal reaction. The prepared materials were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunner-Emmet-Teller (BET) and ultraviolet-visible diffuse reflectance spectroscopy (DRS). MIL-53(Fe)/BiOCl heterojunction is a kind of photoexcited materials and it accelerates the photoreactivity of BiOCI under the visible light irradiation. It was used to remove Rhodamine B (RhB) with the existence of persulfate (PS). The UV-vis spectrophotometer and the TOC detector show that the degradation rate and TOC removal efficiency of RhB (20 mg/L) are 99.5% and 69.4%within 30 min visible-light irradiation, respectively. Due to the proper band gap of material and the presence of electron acceptor, PS, the survival time of active radicals are increased. The active species h(+), center dot SO4- and center dot OH are found to play the important roles during the reaction system. The possible mechanism for the RhB degradation of MIL-53(Fe)/BiOCl/PS is also proposed. Furthermore, the results of the material reusability for the degradation of RhB indicate that the MIL-53(Fe)/BiOCl has a good stability and can be used in the environmental water sample treatment.