两步热聚合法制备多孔氮化碳及其吸附性能  

Preparation of Porous Carbon Nitride by the Two-step Thermal Polymerization Method and its Adsorption Property

作　　者：王化东[1] 罗庆平[1] 李兆乾[1] 黄小锐[1] 祁栋梁 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,四川绵阳621010

出　　处：《西南科技大学学报》2017年第2期31-35,共5页Journal of Southwest University of Science and Technology

基　　金：基金项目:新型结构含能材料四川省高校创新团队(15TD0014)

摘　　要：以三聚氰胺和氯化锂为原料,通过两步热聚合法制备了多孔氮化碳。通过扫描电镜(SEM)、X射线衍射(XRD)、红外光谱(FT-IR)、X射线光电子能谱(XPS)等对所制备多孔氮化碳的性能进行了表征,通过氮吸附法对样品的比表面积及孔结构进行了测试分析。结果表明:所制备的多孔氮化碳为石墨相,其比表面积达到了86.7 m2/g,远高于简单热聚合法制备的块状石墨相氮化碳(g-C_3N_4)。对亚甲基蓝的吸附动力学研究表明,g-C_3N_4对水中亚甲基蓝的吸附满足准二级动力学模型,多孔g-C_3N_4的吸附速率和吸附量远高于块状g-C_3N_4。With melamine and lithium chloride as the raw materials,the porous carbon nitride was prepared by the two-step thermal polymerization method. The properties of the prepared porous carbon nitride were characterized by scanning electron microscopic（ SEM）,X-ray diffraction（ XRD）,Fourier transformation infrared spectroscopy（ FTIR）,X-ray photoelectron spectroscopy（ XPS）. And its specific surface area and pore structure were analyzed by the nitrogen adsorption method. The results show that the prepared porous carbon nitride possesses graphite phase,and its specific surface area is 86. 7 m2/g,which is much higher than that of the massive graphitic carbon nitride（ g-C_3N_4） prepared by the simple thermal polymerization method. The studies of adsorption kinetics of the prepared g-C_3N_4 on methylene blue show the adsorption of g-C_3N_4 on methylene blue in the water meets a quasi two-stage dynamic model. The adsorption rate and adsorption capacity of the porous g-C_3N_4 on methylene blue are far higher than that of the massive g-C_3N_4.

关 键 词：两步热聚合法 多孔石墨相氮化碳 吸附 

分 类 号：O613.71[理学—无机化学] O643.3[理学—化学]