高活性Mn_(2)CoO_(4)活化PMS降解罗丹明B性能研究  

Study on degradation of Rhodamine B by PMS activated by highly active Mn_(2)CoO_(4)

作　　者：刘振阳 董泽平 赵昕琛 崔丰启 何争光[2] LIU Zhen-yang;DONG Ze-ping;ZHAOXin-chen;CUI Feng-qi;HE Zheng-guang(School of Hydraulic and Civil Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学水利与土木工程学院,河南郑州450001 [2]郑州大学生态与环境学院,河南郑州450001

出　　处：《应用化工》2023年第10期2761-2765,共5页Applied Chemical Industry

基　　金：国家科技重大专项水专项(2017ZX07062-001-002)。

摘　　要：通过共沉淀法制备了新型双金属混合氧化物催化剂Mn_(2)CoO_(4)。通过X-射线衍射分析、电镜-能谱分析等方法对该催化剂进行表征分析。将其用于活化过一硫酸盐(PMS)降解罗丹明B(RhB),结果表明,当Mn_(2)CoO_(4)投加量为0.25 g/L,PMS投加量为0.5 mmol/L时,反应15 min后RhB去除效率最高,去除率为99.13%,一级反应速率常数高达0.3439 min^(-1)且可重复利用性能优异。淬灭实验结果表明,硫酸根自由基(SO_(4)^(-)·)在降解过程中起主要作用,羟基自由基(·OH)只有很微弱的作用,超氧自由基(·O_(2)^(-))不参与反应。A novel bimetallic mixed oxide catalyst Mn_(2)CoO_(4) was prepared by co-precipitation method.The catalyst was characterized and analyzed by X-ray diffraction analysis,electron microscope-energy spectrum analysis and other means.It is used to activate persulfate (PMS)to degrade Rhodamine B(RhB).The results show that when the dosage of Mn_(2)CoO_(4) is 0.25 g/L and the dosage of PMS is 0.5 mmol/L,the removal efficiency was highest of RhB after 15 min of reaction.The removal rate is 99.13%,the first-order reaction rate constant is as high as 0.3439 min^(-1),and the reusability is excellent.The quenching test results showed that the sulfate radical(SO_(4)^(-)·)played a major role in the degradation process,and the hydroxyl radical(·OH)only played a weak role,and the superoxide radical(·O_(2)^(-))did not participate in the reaction.

关 键 词：共沉淀 混合氧化物 过一硫酸盐 罗丹明B 

分 类 号：TQ050.4[化学工程] TQ085.4[环境科学与工程—环境工程] X703.1