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近几年,光催化剂由于具有绿色,制备简单,可利用太阳光等优点引起了社会上的极大关注。Bi OBr由于具有独特的电子结构而可能具有很高的光催化活性。本文通过常温化学沉淀法制备了Bi OBr光催化剂,该方法制备条件容易实现,具有极高的实用价值。通过XRD、SEM和UV-vis DRS等方式对Bi OBr的结构、结晶度、形貌及光吸收性能进行了表征。然后将所制备的催化剂应用于罗丹明B(Rh B)的降解,考察了催化剂投加量和Rh B初始浓度对降解反应的影响,并对其降解反应动力学进行了研究。
In recent years, photocatalysts have drawn great social attention due to their advantages of being green, being easy to prepare and utilizing sunlight. Bi OBr may have a high photocatalytic activity due to its unique electronic structure. In this paper, Bi OBr photocatalyst was prepared by room temperature chemical precipitation method. The preparation conditions of the method are easy to realize and have very high practical value. The structure, crystallinity, morphology and optical absorption of Bi OBr were characterized by XRD, SEM and UV-vis DRS. Then, the prepared catalyst was applied to the degradation of rhodamine B (Rh B). The effects of the catalyst dosage and the initial concentration of Rh B on the degradation reaction were investigated. The degradation kinetics was also studied.