摘要
采用溶剂热法将Bi单质附着于草酸亚铁(FeO_(x))上,制备了系列Bi-FeO_(x)复合催化剂并用于活化过硫酸盐.通过X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FT-IR)、扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)等表征方法对复合催化剂的结构、形貌和元素价态进行表征.以罗丹明B (RhB)为降解对象,研究了Bi-FeO_(x)/过硫酸盐/可见光体系中Bi单质含量、催化剂投加量、pH及过硫酸盐浓度等因素对RhB的降解影响.在最佳条件下,反应5 min后,RhB的降解率高达99.8%.Bi的引入,使得复合催化剂增强了对可见光的吸收,提高了光生电子的传输效率,从而加速了对RhB的降解.
Pure bismuth(Bi)metal-modified ferrous oxalate(FeO_(x))composites(Bi-FeO_(x))were prepared by solvothermal method and used in the persulfate activated system.Bi-FeO_(x) was characterized by XRD,FT-IR,SEM and XPS.The catalytic degradation performance of Rhodamine B(RhB)by the prepared samples was evaluated.The effects of Bi element content,catalyst dosage,pH and persulfate concentration on the degradation of RhB were studied in Bi-FeO_(x)/persulfate/visible light system.Under the optimal conditions,the degradation rate of RhB was 99.8%within 5 min.The introduction of Bi can enhance the absorption of visible light of the composite catalyst,increase the transmission efficiency of photogenerated electrons,resulting in accelerating the degradation of RhB.
作者
黎素
张博
谢春生
张扬
肖纯
LI Su;ZHANG Bo;XIE Chunsheng;ZHANG Yang;XIAO Chun(College of Environmental and Chemical Engineering,Zhaoqing University,Zhaoqing 526061;Guangdong Provincial Key Laboratory of Environmental Health and Land Resource,Zhaoqing 526061)
出处
《环境科学学报》
CAS
CSCD
北大核心
2021年第7期2796-2805,共10页
Acta Scientiae Circumstantiae
基金
肇庆市科技创新指导类项目(No.202004030204,201904030201)
肇庆学院校级科研基金项目(No.202012,202021,202022)。
