新生态MnO_(2)的制备及其对2,4-二硝基苯酚吸附性能的影响  

Synthesis of Active Manganese Dioxide and Its Effect on Adsorption Performance of 2,4-Dinitrophenol

作　　者：赵莉 席晓晶 高杰 李扬 马晓梦 张慧盈 魏敏洁 陈华军 田文杰 ZHAO Li;XI Xiaojing;GAO Jie;LI Yang;MA Xiaomeng;ZHANG Huiying;WEI Minjie;CHEN Huajun;TIAN Wenjie(School of Environment Engineering and Chemistry,Luoyang Institute of Science and Technology,Luoyang 471023,China;Sanjie Energy Saving New Material Co.,Ltd.,Luoyang 471132,China;Jiangsu Longjing Kejie Environmental Protection Technology Co.,Ltd.,Yancheng 224001,China)

机构地区：[1]洛阳理工学院环境工程与化学学院,洛阳471023 [2]三杰节能新材料股份有限公司,洛阳471132 [3]江苏龙净科杰环保技术有限公司,盐城224001

出　　处：《硅酸盐通报》2023年第1期295-301,309,共8页Bulletin of the Chinese Ceramic Society

基　　金：河南省科技发展计划(182102311028,222102320353)。

摘　　要：以KMnO_(4)和MnSO_(4)·H_(2)O为原料,在常温常压和水热条件下制备新生态MnO_(2),借助XRD、TEM、低温N 2吸附-脱附等手段对材料进行表征,比较不同制备方法对产物结构和吸附性能的影响。结果表明,反应温度和压力对新生态MnO_(2)的形貌和吸附性能有较大影响,常温常压下合成产物均为短棒状,水热合成产物为介孔纤维,对2,4-二硝基苯酚的吸附效果优于常温常压合成产物。新生态MnO_(2)对2,4-二硝基苯酚的等温吸附和吸附动力学分别符合Langmuir等温式(R 2>0.99)和准二级吸附动力学方程(R 2>0.99),说明2,4-二硝基苯酚在新生态MnO_(2)上为单分子层吸附和化学吸附。溶液pH值能显著影响2,4-二硝基苯酚在新生态MnO_(2)上的吸附,在pH=7时最大吸附量为2.539 mg/g。Using KMnO_(4)and MnSO_(4)·H_(2)O as raw materials,active manganese dioxide was prepared at room temperature and pressure and hydrothermal condition.The synthesized active manganese dioxide was characterized by XRD,TEM and N 2 adsorption-desorption,respectively.The effects of different preparation methods on structure and adsorption performance of the synthesized products were investigated.The results show that the reaction temperature and pressure have a great effect on the morphology and adsorption performance of active manganese dioxide.The shapes of active manganese dioxide prepared at room temperature and pressure are all rod.The products synthesized by hydrothermal method are mesoporous fibers and have better adsorption performance.The adsorption behavior of 2,4-dinitrophenol on active manganese dioxide is well described by Langmuir isotherm equation(R 2>0.99)and pseudo-second-order kinetic equation(R 2>0.99),which indicate that the adsorption process is monolayer and chemical adsorption.The pH value of solution has a significant effect on the adsorption of 2,4-dinitrophenol on active manganese dioxide,and the maximum adsoption capacity is 2.539 mg/g at pH=7.

关 键 词：新生态MnO_(2) 2 4-二硝基苯酚 单分子吸附 化学吸附 水热条件 形貌 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]