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以沉淀法、离子交换法和原位法制备了Ag_3PO_4/海泡石复合光催化剂,采用XRD、FTIR、UV-Vis-DRS对其结构进行了表征,以可见光驱动催化降解日落黄染料为探针反应,考察了制备方法对催化剂光催化性能的影响。结果表明:Ag_3PO_4与海泡石成功复合并产生了协同作用,催化剂中Ag_3PO_4均为立方晶型,部分Ag_3PO_4进入了海泡石层间,改变了其晶面有序性并拓宽了层间距,海泡石对Ag_3PO_4的复合提高了Ag_3PO_4的稳定性和光催化活性;其中,离子交换法制备的光催化剂中Ag_3PO_4与海泡石的复合程度最高,Ag_3PO_4稳定性最强,光催化活性最好,在可见光驱动下,该催化剂对50 mg/L的日落黄降解率可达97.16%,并且对其他3种50 mg/L的染料废水的降解率也在86%以上,此外,该催化剂再生2次后仍保持良好的活性和稳定性。
Ag_3PO_4 / sepiolite composite photocatalysts were prepared by precipitation, ion exchange and in situ methods. Their structures were characterized by XRD, FTIR and UV-Vis-DRS. The visible light was used to catalyze the degradation of sunset yellow dye The effects of preparation methods on the photocatalytic activity of the catalysts were investigated. The results show that Ag 3 PO 4 and sepiolite are successfully composited and synergistic. The Ag_3PO_4 is cubic crystal in the catalyst, part of Ag_3PO_4 enters the sepiolite layer, changing the order of crystal plane and broadening the interlayer spacing. The composite of Ag 3 PO 4 and Ag 3 PO 4 improves the stability and photocatalytic activity of Ag 3 PO 4. Among them, Ag 3 PO 4 and Sepiolite have the highest degree of complexation, the strongest Ag 3 PO 4 and the best photocatalytic activity in the photocatalyst prepared by ion- Driven, the degradation rate of the catalyst for sunset yellow at 50 mg / L was 97.16%, and the degradation rate of the other three 50 mg / L dye wastewater was above 86%. In addition, after the catalyst was regenerated twice Maintain good activity and stability.