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(FnR),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.%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.
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