Abstract:

The in-situ Fe doped graphite phase carbon nitride(g-C₃N₄) catalyst was prepared from dicyandiamide by heat shrinkable polymerization. The prepared Fe/g-C₃N₄ was used as catalyst, under visible light(Vis) irradiation, a heterogeneous photocatalytic Fenton-like system was formed to degrade Rhodamine B with the addition of persulfate (PS). The optimum reaction conditions of photocatalytic Fenton-like system were explored, and the mechanism of the reaction was preliminarily studied. The results showed that the catalytic performance of g-C₃N₄ doped with Fe was significantly improved. Under the condition of the doping amount of Fe 2%, the calcination temperature of catalyst 500℃, pH=3, the addition amount of catalyst 0.6 g/L, and the addition amount of PS 2 g/L, and the degradation time 2 h, the best degradation effect was achieved, and the degradation rate of Rhodamine B reached 98.9%.

Key words: water treatment, photocatalysis, Fenton-like, Fe doped carbon nitride

摘要：

以双氰胺为原料，采用热缩聚法制备了原位掺杂Fe的石墨相氮化碳（g-C₃N₄）。以制备的Fe/g-C₃N₄为催化剂，在可见光照射下，外加过硫酸盐（PS）形成多相光催化-类Fenton体系降解水中罗丹明B，研究了光催化-类Fenton体系最佳反应条件，初步探究了反应机理。结果表明，Fe掺杂后的g-C₃N₄催化性能明显提高。对于Fe掺杂量为2%，焙烧温度为500℃下制备的Fe/g-C₃N₄，当pH为3，催化剂投加量为0.6 g/L，PS投加量为2 g/L，降解时间为60 min时，催化降解效果最好，罗丹明B降解率达98.9%。

关键词: 水处理, 光催化, 类Fenton, Fe掺杂氮化碳

CLC Number: 

• X703