采用水热法合成的 ZnIn2 S4作为前驱体,以尿素为氮源,制备了系列不同 N 掺杂量的 N-ZnIn2 S4光催化剂。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见光吸收光谱(UV-Vis)和 X 射线光电子能谱(XPS)分析技术对样品进行表征。考察了 N掺杂量对催化剂的晶体结构和在可见光条件下催化降解亚甲基蓝(MB)性能的影响。结果表明,N的掺入能够影响催化剂的晶体结构和形貌,提高催化剂在可见光范围内的吸收强度。N-ZnIn2 S4降解 MB 的活性比ZnIn2 S4明显提高,并且具有良好的催化稳定性。同时分析了N掺杂ZnIn2 S4光催化活性提高的机理。
A series of ZnIn2 S4 photocatalysts doped with different amounts of nitrogen (N-ZnIn2 S4 )were pre-pared by using ZnIn2 S4 and urea,where ZnIn2 S4 was obtained via hydrothermal route as precursor and urea was employed as nitrogen source.These as-prepared samples were characterized by X-ray diffraction (XRD),scan-ning electron microscopy (SEM),UV-Visible absorption spectra (UV-Vis)and X-ray photoelectron spectrosco-py (XPS).The effect of N dopant amount in the N-ZnIn2 S4 on crystalline structure and photocatalytic perform-ance of methylene blue (MB)degradation under visible light illumination was investigated.The results indicate that N doping can influence the crystalline structure and morphology of ZnIn2 S4 and enhance visible light ab-sorption of photocatalysts.The performance of MB degradation was remarkably improved by using N-ZnIn2 S4 compared with pure ZnIn2 S4 ,and N-ZnIn2 S4 exhibits quite good catalytic stability.Meanwhile,the mechanism for enhanced photodegradation activity was also analyzed.
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