PANI载的孔状g-C_3N_4的界面聚合法制备与光催化性能研究

Synthesis of Porous g-C_3N_4 Loaded With Highly Dispersed PANI by Interfacial Polymerization and Its Photocatalytic Performance

在孔状石墨型氮化碳(g-C3N4)存在下,通过苯胺单体的界面聚合成功制备了孔状g-C3N4/聚苯胺(PANI)复合催化剂。采用XRD、FTIR、SEM、TGA、UV-Vis和电化学阻抗谱等对样品的结构、形貌、性能以及可见光催化降解亚甲基蓝的催化活性进行表征。结果表明:PANI组装在孔状g-C3N4片上,此种复合结构不仅利于孔状g-C3N4对PANI链段运动的限制,提高孔状g-C3N4/PANI复合催化剂的稳定性;而且增强材料的可见光利用率、氧化能力和电子输运性能,利于可见光催化性能的改善。

Polyaniline（PANI） was successfully loaded on porous graphitic carbon nitride（porous g-C3N4） by interfacial polymerization of aniline monomers. The structure, morphology and properties of the prepared samples were characterized by XRD, FTIR, SEM, TGA, UV-Vis and Electrochemical Impedance Spectroscope（EIS）. Photocatalytic degradation of methylene blue was investigated to determine the photoactivity of the catalyst. The porous g-C3N4 showed good dispersion and interfacial adhesion to PANI, which improved the photocatalytic degradation of methylene blue and thermal stability. The improved photocatalytic activity could be attributed to the improved visible light utilization, oxidation power and electron transport property.