一步水热法合成Mn_(3)O_(4)/CuMnO_(2)及其光芬顿反应性能的研究  

Synthesis of Mn_(3)O_(4)/CuMnO_(2) by One-Step Hydrothermal Method and Its Photo-Fenton Reaction Performance

作　　者：李哲 王芳芳 陈常东 LI Zhe;WANG Fangfang;CHEN Changdong(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《石油化工高等学校学报》2024年第3期73-80,共8页Journal of Petrochemical Universities

基　　金：教育部“春晖计划”合作科研项目(2020703-8);国家留学基金委公派访学学者面上项目(CSC202008210025);辽宁省教育厅项目(LJKMZ20220736,JYTMS20231424)。

摘　　要：以二水合氯化铜、四水合氯化锰为原料,通过一步水热法制备了Mn_(3)O_(4)/Cu Mn O_(2)异质结构催化剂CMO-A(A为水热合成温度);通过X射线粉末衍射仪对不同合成温度下制备的样品进行了组成分析;以汞灯为光源,50 mg/L罗丹明B(Rh B)溶液作为污染物模型,对所制备CMO-A样品的光芬顿反应性能进行了测试;向反应体系中加入牺牲剂,结合对照实验探究了反应机理。结果表明,在反应温度为150℃时合成的样品CMO-150对Rh B溶液的降解效果最好,降解时间为15 min时降解率可达98.01%;0.2 mol/L H_(2)O_(2)、50 mg CMO-150催化剂、50 mg/L Rh B溶液、pH=3.0为最佳反应条件;经过5次循环后,降解时间为15 min时降解率仅下降22.24%;反应的主要活性物种为羟基自由基(·OH);结合对照实验,对反应机理进行了探究。Heterogeneous Mn_(3)O_(4)/CuMnO_(2) catalyst CMO-A is prepared by a one-step hydrothermal method using cupric chloride dihydrate and manganese chloride tetrahydrate as raw materials.The composition of the samples prepared at different temperatures is analyzed by X-ray diffraction analysis.Using mercury lamp as light source and 50 mg/L Rhodamine B(RhB)solution as contaminant model,the photo-Fenton reaction performance of the prepared CMO-A sample is tested.The results show that CMO-150 has the best degradation effect on RhB solution when the reaction temperature is 150℃,and the degradation rate reaches 98.01% when the reaction time is 15 min.The optimal reaction conditions and cyclic stability of CMO-150 catalyst are investigated.The experimental results show that the optimal reaction conditions are 0.2 mol/L H_(2)O_(2),50 mg CMO-150 catalyst,50 mg/L RhB solution and pH=3.0.After 5 cycles,the degradation rate only decreases by 22.24% at 15 min.The main active species in the reaction is hydroxyl radical(·OH)through the sacrificial agent experiment,and the reaction mechanism is explored by combining with the control experiment.

关 键 词：水热法 CuMnO_(2) 异质结 光芬顿反应 罗丹明B 

分 类 号：TQ131.2[化学工程—无机化工]