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硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (1): 295-301.

所属专题: 陶瓷

• 陶瓷 • 上一篇    下一篇

新生态MnO2的制备及其对2,4-二硝基苯酚吸附性能的影响

赵莉1, 席晓晶1, 高杰2, 李扬3, 马晓梦1, 张慧盈1, 魏敏洁1, 陈华军1, 田文杰1   

  1. 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
  • 收稿日期:2022-09-05 修订日期:2022-10-19 出版日期:2023-01-15 发布日期:2023-02-15
  • 通信作者: 田文杰,博士,教授。E-mail:twj7210@126.com
  • 作者简介:赵 莉(1977—),女,助教。主要从事微纳米材料的制备与应用研究。E-mail:zhaolidemail@163.com
  • 基金资助:
    河南省科技发展计划(182102311028,222102320353)

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

ZHAO Li1, XI Xiaojing1, GAO Jie2, LI Yang3, MA Xiaomeng1, ZHANG Huiying1, WEI Minjie1, CHEN Huajun1, TIAN Wenjie1   

  1. 1. School of Environment Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China;
    2. Sanjie Energy Saving New Material Co., Ltd., Luoyang 471132, China;
    3. Jiangsu Longjing Kejie Environmental Protection Technology Co., Ltd., Yancheng 224001, China
  • Received:2022-09-05 Revised:2022-10-19 Online:2023-01-15 Published:2023-02-15

摘要: 以KMnO4和MnSO4·H2O为原料,在常温常压和水热条件下制备新生态MnO2,借助XRD、TEM、低温N2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MnO2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MnO2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(R2>0.99)和准二级吸附动力学方程(R2>0.99),说明2,4-二硝基苯酚在新生态MnO2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MnO2上的吸附,在pH=7时最大吸附量为2.539 mg/g。

关键词: 新生态MnO2, 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

Abstract: Using KMnO4 and MnSO4·H2O 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 N2 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 (R2>0.99) and pseudo-second-order kinetic equation (R2>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.

Key words: active manganese dioxide, 2,4-dinitrophenol, monolayer adsorption, chemical adsorption, hydrothermal condition, morphology, kinetics

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