无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
研究与开发

不同晶型纳米二氧化锰制备及对亚甲基蓝吸附性能

  • 许乃才 ,
  • 史丹丹
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  • 1.青海师范大学化学化工学院,青海西宁810008
    2.青海省科学技术信息研究所有限公司
许乃才(1984— ),男,博士,副教授,研究方向为功能无机材料;E-mail:xunc@qhnu.edu.cn

收稿日期: 2020-09-22

  网络出版日期: 2021-03-11

基金资助

青海省自然科学基金(2018-ZJ-928Q);青海省高端创新人才“千人计划”项目;中国科学院“西部之光”人才项目;青海师范大学博士科研启动基金

Preparation of manganese dioxide nanomaterials with different crystalline and their adsorption properties to methylene blue

  • Naicai Xu ,
  • Dandan Shi
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  • 1. School of Chemistry and Chemical Engineering,Qinghai Normal University,Xining 810008,China
    2. Institute Co.Ltd.of Science and Technology Information of Qinghai Province

Received date: 2020-09-22

  Online published: 2021-03-11

摘要

以高锰酸钾(KMnO4)为氧化剂、硫酸亚铁铵[(NH42Fe(SO42]为还原剂,用水热氧化还原反应制备了层状δ-二氧化锰和隧道型α-二氧化锰纳米材料。用X射线衍射(XRD)、扫描电镜(SEM)和氮气吸-脱附技术对产物的晶型、形貌及孔结构进行了表征。实验结果表明,δ-二氧化锰呈花状微球形貌,具有介孔结构(平均孔径为3.4 nm),BET比表面积为219 m2/g;α-二氧化锰呈纳米线束形貌,具有部分介孔结构(平均孔径为35.7 nm和154.6 nm),BET比表面积为26 m2/g。研究了不同晶型纳米二氧化锰对亚甲基蓝的吸附性能。实验结果表明,在相同条件下α-二氧化锰的吸附性能优于δ-二氧化锰,且在碱性环境下吸附效果较好。当反应时间达到120 min时,α-二氧化锰和δ-二氧化锰对亚甲基蓝的去除率分别为84.4%和82.9%。

本文引用格式

许乃才 , 史丹丹 . 不同晶型纳米二氧化锰制备及对亚甲基蓝吸附性能[J]. 无机盐工业, 2021 , 53(3) : 44 -47 . DOI: 10.11962/1006-4990.2020-0218

Abstract

:Layered manganese dioxide(δ-MnO2) and tunneling manganese dioxide(α-MnO2) nanomaterials were prepared by using hydrothermal oxidation-reduction reaction by using KMnO4 as oxidant and(NH42 Fe(SO42 as reductant.The obta-ined products were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM) and N2 adsorption-des-orption technologies in order to investigate their crystalline,morphology and pore structural properties.The above results indi-cate that δ-MnO2 has flower-like sphere morphology with mesoporous structure(average pore diameter is 3.4 nm),and its BET specific surface area is 219 m2/g.α-MnO2 has nanowire bundles shape with partial mesopore structure(average pore di-ameter is 35.7 and 154.6 nm),and its BET specific surface area is 26 m2/g.In addition,the adsorption properties of methylene blue on different crystalline of manganese dioxide were studied which demonstrate that the adsorption performance of α-MnO2 was better than that of δ-MnO2 under the same conditions,and the absorption efficiency was even better in alkaline environ-ment.When the reaction time reached 120 min,the removal rates of α-MnO2 and δ-MnO2 toward methylene blue reach to 84.4% and 82.9%,respectively.

参考文献

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