| 一锅法制备Co3O4/g-C3N4复合光催化剂及其光催化性能 | |
| Preparation and Photocatalytic Activity of Co3O4/g-C3N4 Composite Photocatalysts via One-Pot Synthesis | |
| 摘要: 以三聚氰胺和六水合氯化钴为原料，一锅法制备Co3O4负载的多孔石墨相氮化碳（Co3O4/g-C3N4）复合光催化材料。采用X射线衍射（XRD）、傅里叶变换红外（FT-IR）光谱、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、紫外-可见漫反射光谱（UV-Vis DRS）、光致发光光谱（PL）等手段对其结构和光学特性进行表征。以盐酸四环素（TC）为目标污染物，评价了不同负载量Co3O4/g-C3N4复合光催化剂的可见光催化性能。结果表明，所制备的Co3O4/g-C3N4复合光催化剂为多孔结构，其比表面积较大，并在可见光区域具有显著的吸收。利用原位生成的Co3O4纳米粒子在氮化碳表面形成异质结构，可有效转移光生载流子，降低光生电子-空穴的再结合率，从而提高光催化活性。并且存在最佳Co3O4复合量，当六水合氯化钴加入量为三聚氰胺的8%（w/w）时，所制备的复合光催化剂CoCN-8具有最佳的光催化性能。在可见光的照射下，60 min内可降解85%的TC，而同样条件下，纯g-C3N4仅降解23%的TC。 | |
| 关键词: g-C3N4 Co3O4/g-C3N4复合光催化剂 多孔结构 光催化 | |
| 基金项目: 中国博士后科学基金（No.2017M611694）和国家自然科学基金（No.21571084，51302108）资助项目 | |
| Abstract: A series of Co3O4/g-C3N4 composite photocatalysts were prepared by a one-pot method using melamine and cobalt chloride hexahydrate as raw materials. The structure and optical properties of the synthesized samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and photoluminescence spectrum (PL). The photocatalytic activities of Co3O4/g-C3N4 composites were evaluated by using tetracycline hydrochloride(TC) as a model pollutant under visible light irradiation. The results indicated that Co3O4/g-C3N4 composite photocatalysts were porous structures with high specific surface area, which have significant light absorption in visible light region. The in-situ generated Co3O4 nanoparticles can form heterojunctions on the surface of g-C3N4, which can effectively transfer the photon-generated carriers and decrease the recombination rate of electrons and holes, thus the photocatalytic activity can be efficiently improved. Besides, there was an optimal amount of Co3O4 for the Co3O4/g-C3N4 composite photocatalysts. When the adding amount of cobalt chloride hexahydrate was 8%(w/w) of melamine, the obtained composite photocatalyst (CoCN-8) showed the highest photocatalytic performance and the degradation of TC can reach 85% within 60 min under visible light irradiation. However, in the same condition, the degradation of TC can only reach 23% by pure g-C3N4 photocatalyst. | |
| Keywords: g-C3N4 Co3O4/g-C3N4 composite photocatalysts porous structure photocatalytic | |
| 投稿时间：2018-11-22 修订日期：2019-01-25 | |
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| 段丽颖,路姗姗,段芳,陈明清.一锅法制备Co3O4/g-C3N4复合光催化剂及其光催化性能[J].无机化学学报,2019,35(5):793-802. | |
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