核黄素掺杂的新型石墨相氮化碳光催化剂的制备及其在四环素降解中的应用

The Preparation of Riboflavin Doped Graphitic Carbon Nitride Photocatalyst and Its Application in Tetracycline Degradation

针对g-C_(3)N_(4)有限的可见光吸收能力和容易复合的光生载流子限制其光催化性能发挥的问题,以尿素为前驱体,核黄素(RF)为掺杂试剂,通过一步热聚合制备了新型g-C_(3)N_(4)-RF光催化剂。表征结果表明:新型g-C_(3)N_(4)-RF光催化剂被成功制备,并具有优异的可见光吸收能力和有效的光生电子空穴对分离效率。光催化降解实验表明:该催化剂在可见光下对四环素抗生素具有优异的光催化降解性能。

Graphitic carbon nitride(g-C_(3)N_(4)),as a metal-free photocatalyst,has attracted extensive attention in the field of environmental pollution control.However,the photocatalytic performance of g-C_(3)N_(4) is limited by its limited visible-light absorption capacity and easy-recombined photogenerated carriers.In this study,a new g-C_(3)N_(4)-RF photocatalyst is prepared by one-step thermal polymerization using urea as precursor and riboflavin(RF)as doping reagent.A series of characterization tests(FT-IR,XRD,SEM,UV-Vis DRS,PL)show that the new g-C_(3)N_(4)-RF photocatalyst is successfully prepared with excellent visible light absorption capacity and effective electron hole separation efficiency.The photocatalytic degradation experiment shows that the catalyst has excellent photocatalytic degradation performance for TC under visible light.This study provides a new idea for the development of new carbon nitride photocatalyst and provides a new clue for the efficient removal of antibiotic pollutants.