MoS2/g-C3N4复合材料的制备及可见光催化性能
Synthesis and Visible Light Photocatalytic Performance of MoS2/g-C3N4 Composites
作者单位E-mail
徐梦秋 武汉轻工大学化学与环境工程学院, 武汉 430023  
柴波 武汉轻工大学化学与环境工程学院, 武汉 430023 willycb@163.com 
闫俊涛 武汉轻工大学化学与环境工程学院, 武汉 430023  
汪海波 武汉轻工大学化学与环境工程学院, 武汉 430023  
任占冬 武汉轻工大学化学与环境工程学院, 武汉 430023  
摘要: 首先在N-甲基吡咯烷酮溶液中超声剥离得到少层的MoS2,将其与石墨相氮化碳(g-C3N4)复合,制得MoS2/g-C3N4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MoS2/g-C3N4复合材料光催化降解罗丹明B(RhB)的活性,结果表明:将少量MoS2与g-C3N4复合可明显提高光催化活性,且1%(w/w)MoS2/g-C3N4复合物的光催化活性最高,可能的原因是MoS2和g-C3N4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。
关键词: MoS2/g-C3N4复合材料  光催化  降解  罗丹明B
基金项目: 武汉轻工大学科研项目(No.2016y18)和湖北省科技支撑计划项目(No.2015BAA100)资助。
Abstract: 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 (RhB) 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.
Keywords: MoS2/g-C3N4 composites  photocatalysis  degradation  rhodamine B
投稿时间:2016-10-14 最后修改时间:2016-12-13
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徐梦秋,柴波,闫俊涛,汪海波,任占冬.MoS2/g-C3N4复合材料的制备及可见光催化性能[J].无机化学学报,2017,33(3):389-395.
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