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锰氧化物八面体分子筛活化过一硫酸氢盐降解酸性橙7

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熊易玄, 柯雪珍, 陈成, 徐爱华. 锰氧化物八面体分子筛活化过一硫酸氢盐降解酸性橙7[J]. 环境工程学报, 2016, 10(10): 5600-5604. doi: 10.12030/j.cjee.201504203
引用本文: 熊易玄, 柯雪珍, 陈成, 徐爱华. 锰氧化物八面体分子筛活化过一硫酸氢盐降解酸性橙7[J]. 环境工程学报, 2016, 10(10): 5600-5604. doi: 10.12030/j.cjee.201504203
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XIONG Yixuan, KE Xuezhen, CHEN Cheng, XU Aihua. Heterogeneous activation of peroxymonosulfate by cryptomelane type manganese oxide for Acid Orange 7 degradation in aqueous solutions[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5600-5604. doi: 10.12030/j.cjee.201504203
Citation: XIONG Yixuan, KE Xuezhen, CHEN Cheng, XU Aihua. Heterogeneous activation of peroxymonosulfate by cryptomelane type manganese oxide for Acid Orange 7 degradation in aqueous solutions[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5600-5604. doi: 10.12030/j.cjee.201504203
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锰氧化物八面体分子筛活化过一硫酸氢盐降解酸性橙7

  • 1.

    武汉纺织大学环境工程学院, 武汉 430200

  • 基金项目:

    国家自然科学基金资助项目（21207015）

  • 中图分类号: X703.1

Heterogeneous activation of peroxymonosulfate by cryptomelane type manganese oxide for Acid Orange 7 degradation in aqueous solutions

  • 1.

    School of Environmental Engineering, Wuhan Textile University, Wuhan 430200, China

  • Fund Project:

  • 摘要: 采用无溶剂法制备了氧化锰八面体分子筛（OMS-2），通过XRD、FT-IR、SEM、TEM及N2吸附-脱附等温线等对其结构进行了表征，并以典型难降解偶氮染料酸性橙7（AO7）为目标污染物，考察了OMS-2活化过一硫酸氢盐（PMS）降解AO7的性能。研究结果发现，无溶剂法制备的OMS-2呈纳米棒状，为典型的锰钾矿型结构，比表面积达到129 m2·g-1，平均粒径10.5 nm左右。OMS-2催化剂能够高效催化PMS产生活性自由基降解偶氮染料，反应10 min内可使AO7几乎完全脱色，重复使用10次均能保持较高的催化稳定性；脱色降解后染料分子中的共轭体系和芳香环结构被破坏。
    Abstract: Cryptomelane-type manganese oxide, OMS-2, was prepared by a solvent-free process, and characterized by X-ray diffraction, scanning electron microscopy, N2 adsorption/desorption isotherms, and fourier transform infrared spectroscopy. The activity and stability of the catalyst were tested for degradation of Acid Orange 7 (AO7) in the presence of peroxymonosulfate. OMS-2 exhibited the typical cryptomelane phase with a nanorod morphology, and had a surface area of 129 m2·g-1 and crystallite size of 11 nm. The catalyst was quite active for AO7 degradation, with production of sulfate radicals;AO7 was completely decolorized within 10 min due to the destruction of its conjugate structure and naphthaquinone ring. The catalyst also exhibited a high stability over ten cycles.
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  • 收稿日期:  2015-06-18
  • 刊出日期:  2016-10-20

锰氧化物八面体分子筛活化过一硫酸氢盐降解酸性橙7

  • 1. 武汉纺织大学环境工程学院, 武汉 430200
  • 收稿日期:  2015-06-18
基金项目:

国家自然科学基金资助项目（21207015）

摘要: 采用无溶剂法制备了氧化锰八面体分子筛（OMS-2），通过XRD、FT-IR、SEM、TEM及N2吸附-脱附等温线等对其结构进行了表征，并以典型难降解偶氮染料酸性橙7（AO7）为目标污染物，考察了OMS-2活化过一硫酸氢盐（PMS）降解AO7的性能。研究结果发现，无溶剂法制备的OMS-2呈纳米棒状，为典型的锰钾矿型结构，比表面积达到129 m2·g-1，平均粒径10.5 nm左右。OMS-2催化剂能够高效催化PMS产生活性自由基降解偶氮染料，反应10 min内可使AO7几乎完全脱色，重复使用10次均能保持较高的催化稳定性；脱色降解后染料分子中的共轭体系和芳香环结构被破坏。

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