N掺杂Co3O4纳米片的制备以及活化过一硫酸盐的性能研究
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南京信息工程大学环境科学与工程学院

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TB332

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Fabrication of N-doped Co3O4 Nanosheets with high catalytic performanc of activated Peroxymonosulfate
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School of Environmental Science and Engineering,Nanjing University of Information Science and Technology

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    本文采用牺牲模板法合成N掺杂Co3O4纳米片(N-Co NS),并通过透射电子显微镜(TEM),原子力显微镜(AFM)和光电子能谱(XPS)对制备材料的形貌结构,化学组成进行分析,此外还通过催化活化过一硫酸盐(PMS)降解水中双酚A(BPA)来探究催化剂的催化性能.实验结果表明与Co3O4纳米颗粒(Co NP)、Co3O4纳米片(Co NS)相比,N-Co NS表现出了较高的催化性能.在PMS浓度为2 mM,BPA初始浓度为50 mg L-1的反应条件下,N-Co NS在10分钟内完全降解水中的BPA,这说明N掺杂和二维纳米片结构有利于催化剂性能的提升.通过pH,离子影响实验证实N-Co NS在复杂水化学环境中仍具有较高的活性.此外结合自由基捕获实验和电子顺磁共振(EPR)测试证实反应体系中产生了高氧化活性的羟基自由基和硫酸根自由基.

    Abstract:

    Nitrogen-doped Co3O4 nanosheets (N-Co NS) were synthesized by sacrificial template method. The morphological structure and chemical composition of the obtained materials were characterized by Transmission electron microscopy (TEM), Atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). In addition, the catalytic performance of the prepared catalysts was evaluated by catalytically activating peroxymonosulfate (PMS) to degrade bisphenol A (BPA) in water. Compared with Co3O4 nanoparticles (Co NP) and Co3O4 nanosheets (Co NS), N-Co NS exhibits higher catalytic performance according to the experimental results. Under the reaction conditions that the dosage of PMS is 2 mM and the initial concentration of BPA is 50 mg L-1, N-Co NS completely degrades BPA in water within 10 minutes, indicating that N-doping and two-dimensional nanosheet structure are beneficial to the improvement of catalyst performance. N-Co NS still has high activity in complex water chemical environment proved by the pH and ions effect experiments. Besides, the high oxidative activity hydroxyl radicals and sulfate radicals were produced in the reaction system, which was confirmed by the trapping experiments and Electron paramagnetic resonance (EPR) tests.

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  • 收稿日期:2022-01-13
  • 最后修改日期:2022-03-08
  • 录用日期:2022-03-09
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