作　　者： (代宏哲）; (高续春）; (张俊霞）; (梁颖）; (樊君）;

机构地区： 榆林学院化工学院,陕西榆林719000

出　　处： 《当代化工》 2017年第8期1538-1542,共5页

摘　　要： 以三聚氰胺为原料,采用梯度升温热解法制备了石墨状氮化碳(g-C_3N_4),采用XRD、XPS、FTIR、SEM及UV-Vis、PL等技术手段对氮化碳材料的微观结构和光学性能进行了表征,并分析其光解水产氢性能。结果表明:采用梯度升温热解法制备的g-C_3N_4结构良好;620°C才开始快速分解,对热稳定性良好;几乎不溶于常见试剂,化学稳定性较好;在400~550 nm的可见光波长范围内对可见光有着明显吸收,禁带宽度达到2.42 e V,具有较高的光催化分解水制氢能力(18.95μmol/h). Graphitic carbon nitride materials（g-C3N4） with high visble-light response were prepared from melamine by gradient pyrolysis method. XRD, XPS, FT-IR, SEM and UV-Vis, PL were employed to investigate the crystal phases, composition and chemical states, micrographs of the materials. Also, the light absorption and photocatalytic activity of g-C3N4 for hydrogen production were studied. The results indicate that g-C3N4 can be successfully prepared by gradient pyrolysis method, and it has many characteristics, such as good structure, good heat stability and good chemical stability; In visible wavelength range of 400-550 nm, g-C3N4 can obviously absorb visible light, and the band gap is about 2.42 eV which means efficient visible light absorption, and hydrogen yield can reach to 18.95 μmol/h.

关 键 词： 产氢 石墨状氮化碳 光催化