粉煤灰漂珠@C3N4复合材料的合成及其光催化性能

制备漂珠@氮化碳（P@C3N4）光催化复合材料，通过利用XRD、SEM、XPS和UV-dis对材料的晶型、形貌和光响应进行表征，考察P@C3N4作为催化剂在可见光下降解亚甲基蓝（MB）与四环素的效果及动力学，对复合材料的重复使用性及降解机理进行探讨。结果表明，C3N4被成功负载在粉煤灰漂珠颗粒上，P@C3N4复合材料具有良好的可见光吸收性能。光照条件下，P@C3N4复合材料可有效提高MB与四环素的降解效果，一级动力学模型可描述污染物的光催化降解过程。P@C3N4光催化剂具有良好的稳定性，空穴和羟基自由基很可能是P@C3N4复合材料在光催化作用过程中起主要作用的活性基团。

Synthesis of Fly Ash Floating Bead@C3N4 Composite Material and Its Photocatalytic Performance

A photocatalytic composite material of floating beads@nitrocarbon (P@C3N4) was prepared. The performance of material was characterized by XRD, SEM, XPS and UV-dis. Degradation effect and kinetics of methylene blue (MB) and tetracycline using P@C3N4 as catalyst under visible light was investigated. The reusability and degradation mechanism of composite materials were discussed. The results show that C3N4 is successfully loaded on fly ash float beads, and P@C3N4 composite material exhibites excellent visible light absorption performance. P@C3N4 composite material can effectively improve degradation effect of MB and tetracycline under visible light, and the first-order kinetic model can express the photocatalytic degradation process of pollutants. P@C3N4 photocatalyst has highly stability, and holes and hydroxyl radicals are likely to be the active species playing a major role in the process of photocatalytic reaction.