Facile Fabrication of Fe2O3/Nitrogen Deficient g-C3N4-x Composite Catalysts with Enhanced Photocatalytic Performances

The modification of graphitic carbon nitride can significantly improve the photocatalytic performance of graphitic carbon nitride(g-C3N4).Fe2O3/nitrogen-deficient g-C3N4-x composite catalysts were prepared with dicyandiamide as the precursor and Fe3+doped in this study.The composite catalysts were characterized by XRD,SEM,FT-IR,XPS and photocurrent measurements.Close interaction occurred between Fe2O3 and nitrogen deficient g-C3N4-x,more photogenerated electrons were created and effectively separated from the holes,resulting in a decrease of photocarrier recombination,and thus enhancing the photocurrent.Photocatalytic performance experiments showed that Fe2O3/nitrogen deficient g-C3N4-x could utilize lowenergy visible light more efficiently than pure g-C3N4,and the removal rate was 92%in 60 minutes.

磁性氮化碳的制备及其光催化活性研究

工业快速发展的同时,环境污染日趋严重,光催化技术被认为是最有前景的污水处理技术。为了解决光催化剂的回收利用问题,以尿素和九水合硝酸铁为原料,通过煅烧法先合成石墨相氮化碳(g-C3N4),然后采用热聚合法制备了一系列不同氧化铁含量的Fe2O3/g-C3N4复合磁性可见光响应催化剂。结果表明,Fe2O3与g-C3N4形成了异质结,复合材料光催化活性良好。当Fe2O3含量为10%时,复合催化剂的光催化降解活性和磁分离回收性能均较好,反应30min后罗丹明B水溶液的降解率高达99.48%。