磁性氮化碳的制备及其光催化活性研究

Preparation of Magnetic Carbon Nitride and Exploration of Photocatalytic Activity

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%。

With the rapid development of industry,environmental pollution is becoming more and more serious.Photocatalyst technology is considered to be the most promising sewage treatment technology.In order to solve the problem of photocatalyst recovery and reuse,this paper uses urea and ferric nitrate nonahydrate as raw materials,firstly synthesizes graphite phase carbon nitride(g-C3 N4)through a simple calcination method,and then uses thermal polymerization to prepare a series of different Fe2 O3/g-C3 N4 composite magnetic visible light response catalyst with iron oxide content.The results showed that Fe2 O3 and g-C3 N4 formed a heterojunction,and the composite material had good photocatalytic activity.When the Fe2 O3 content is 10%,the photocatalytic degradation activity and magnetic separation recovery performance of the prepared catalyst are better,and the degradation rate of rhodamine B aqueous solution for 30 min is as high as 99.48%.