磁性花状Fe3O4/C/MnO2/C3N4光催化剂的制备及其性能研究

Research on Synthesis and Performance of Magnetic Flower-like FeO/C/MnO/CN Composite Photocatalyst

磁性MnO2基复合材料具有优异的光催化性能,本文在空心Fe3O4微球表面包覆C层,通过水热法在微球表面生成花状MnO2,并利用CN前驱体原位包覆和低温聚合法制备得到Fe3O4/C/MnO2/C3N4复合催化剂。磁性内核便于磁分离,导电C层可抑制光生载流子的重组,同时构建g-C3N4与MnO2之间的异质结可进一步提高催化性能。利用SEM、TEM进行形貌和结构表征,并对光催化活性的影响因素进行研究。

Magnetic MnO2-based composite material has excellent photocatalytic performance. In this work, MnO2 was grown after coating C layer on hollow Fe3O4 nanospheres. The Fe3O4/C/MnO2/C3N4 magnetic composite catalyst was synthesized by in-situ coating and low temperature polymerization of the CN precursor. The core facilitates magnetic separation and the introduction of conductive C layer can inhibit the recombination of photo-generated carriers. Meanwhile, the heterojunction between g-C3N4 and MnO2 was constructed to improve the catalytic performance. The morphology and structure were characterized by SEM and TEM, and the influencing factors of photocatalytic activity were investigated.