MoS_2/g-C_3N_4复合材料的制备及可见光催化性能  

Synthesis and Visible Light Photocatalytic Performance of MoS_2/g-C_3N_4 Composites

作　　者：徐梦秋[1] 柴波[1] 闫俊涛[1] 汪海波[1] 任占冬[1] XU Meng-Qiu CHAI Bo YAN Jun-Tao WANG Hai-Bo REN Zhan-Dong(School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, Chin)

机构地区：[1]武汉轻工大学化学与环境工程学院,武汉430023

出　　处：《无机化学学报》2017年第3期389-395,共7页Chinese Journal of Inorganic Chemistry

基　　金：武汉轻工大学科研项目(No.2016y18);湖北省科技支撑计划项目(No.2015BAA100)资助

摘　　要：首先在N-甲基吡咯烷酮溶液中超声剥离得到少层的MoS_2,将其与石墨相氮化碳(g-C_3N_4)复合,制得MoS_2/g-C_3N_4复合材料。采用X射线衍射(XRD),扫描电镜(SEM),X射线光电子能谱(XPS),傅里叶变换红外光谱(FTIR),Raman光谱,紫外-可见漫反射吸收光谱(DRS)和光致荧光(PL)技术对复合材料进行表征。可见光下考察MoS_2/g-C_3N_4复合材料光催化降解罗丹明B(Rh B)的活性,结果表明:将少量MoS_2与g-C_3N_4复合可明显提高光催化活性,且1%(w/w)MoS_2/g-C_3N_4复合物的光催化活性最高,可能的原因是MoS_2和g-C_3N_4匹配的能带结构,增大了界面间电荷的传输,降低了光生电子-空穴的复合,进而提高了光催化活性。The few layered MoS2 was obtained by liquid-phase ultrasonic exfoliation in the N-methyl-2-pyrrolidone solution, and then coupled with the graphitic carbon nitride（g-C3N4） to construct MoS2/g-C3N4 composites.The as-prepared composites were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, X-ray photoelectron spectroscopy（XPS）, Fourier transform infrared spectroscopy（FTIR）,Raman spectroscopy, UV-vis diffuse reflectance absorption spectroscopy（DRS） and Photoluminescence（PL）spectra.The photocatalytic activities of composites were evaluated by the degradation of Rhodamine B（Rh B）under visible light irradiation.The experimental results showed that a small amount of MoS2 in the composites could remarkably improve the photocatalytic activity, and 1%（w/w） MoS2/g-C3N4 composite exhibited the best photocatalytic performance.The significantly enhanced photocatalytic activity was probably ascribed to the matched energy band structures between MoS2 and g-C3N4, increasing the interfacial charge transfer and thus inhibiting the recombination of photo-generated electron-holes pairs.

关 键 词：MoS2/g-C3N4复合材料 光催化 降解 罗丹明B 

分 类 号：O643[理学—物理化学]