氮化碳-铁氧体尖晶石光催化材料的研究进展

Research progress in photocatalysts g-C_3N_4 coupling with spinel type ferrit (AFe_2O_4)

半导体光催化技术可以将太阳能转换为化学能,在染料降解方面具有广阔的应用前景。g-C3N4具有独特的电子能带结构、良好的热稳定性和化学稳定性,铁氧体尖晶石是一种新型的非均相光fenton试剂,两种材料展示染料降解方面的应用前景。然而比表面积较小、光生电子和空穴易复合等缺点严重限制其光催化活性。从光催化机理出发,介绍近年来国内外关于g-C3N4和铁氧体尖晶石方面的研究,简要叙述g-C3N4的结构和制备过程,以及g-C3N4复合铁氧体尖晶石后的光催化性能和磁控分离循环使用性能的变化,并对其未来的发展趋势进行展望。

Solar energy can be directly converted into chemical energy by semiconductor photocatalysis, which is considered as a promising technique in dye degradation. The graphitic carbon nitride （g-C3N4） has a unique structure of electron band, with thermal and chemical stability, and spinel type ferrit is a type of novel heterogeneous fenton reagent. Both of them show wide application prospect in dye degradation. Nevertheless, photocatalytic activity is restricted severely by low surface area and recombination of photogenerated electrons-holes. This review summaries recent researches on g-C3N4 and spinel type ferrit using as photocatalyst, including mechanisms of photocatalytic, structure and synthesis of g-C3N4, and photocatalytic performance and separation ability of g-C3N4 coupling with spinel type ferrit. The prospects for the development of high efficient photocatalysts based on g-C3N4-spinel type ferrit are also discussed.