中国物理B ›› 2023, Vol. 32 ›› Issue (4): 47503-047503.doi: 10.1088/1674-1056/ac946b

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Abnormal magnetic behavior of prussian blue analogs modified with multi-walled carbon nanotubes

Jia-Jun Mo(莫家俊)1, Pu-Yue Xia(夏溥越)1, Ji-Yu Shen(沈纪宇)1, Hai-Wen Chen(陈海文)2, Ze-Yi Lu(陆泽一)1, Shi-Yu Xu(徐诗语)1, Qing-Hang Zhang(张庆航)1, Yan-Fang Xia(夏艳芳)1,†, and Min Liu(刘敏)1,‡   

  1. 1 College of Nuclear Science and Technology, University of South China, Hengyang 421001, China;
    2 College of Energy, Xiamen University, Xiamen 361005, China
  • 收稿日期:2022-07-26 修回日期:2022-09-21 接受日期:2022-09-23 出版日期:2023-03-10 发布日期:2023-03-10
  • 通讯作者: Yan-Fang Xia, Min Liu E-mail:xiayfusc@126.com;liuhart@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11447231 and 12105137), the National Undergraduate Innovation and Entrepreneurship Training Program Support Projects of China, the Natural Science Foundation of Hunan Province, China (Grant No. 2020JJ4517), the Research Foundation of Education Bureau of Hunan Province, China (Grant Nos. 19A434, 19A433, and 19C1621), and the Opening Project of Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China (Grant Nos. 2019KFY10 and 2019KFY09).

Abnormal magnetic behavior of prussian blue analogs modified with multi-walled carbon nanotubes

Jia-Jun Mo(莫家俊)1, Pu-Yue Xia(夏溥越)1, Ji-Yu Shen(沈纪宇)1, Hai-Wen Chen(陈海文)2, Ze-Yi Lu(陆泽一)1, Shi-Yu Xu(徐诗语)1, Qing-Hang Zhang(张庆航)1, Yan-Fang Xia(夏艳芳)1,†, and Min Liu(刘敏)1,‡   

  1. 1 College of Nuclear Science and Technology, University of South China, Hengyang 421001, China;
    2 College of Energy, Xiamen University, Xiamen 361005, China
  • Received:2022-07-26 Revised:2022-09-21 Accepted:2022-09-23 Online:2023-03-10 Published:2023-03-10
  • Contact: Yan-Fang Xia, Min Liu E-mail:xiayfusc@126.com;liuhart@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11447231 and 12105137), the National Undergraduate Innovation and Entrepreneurship Training Program Support Projects of China, the Natural Science Foundation of Hunan Province, China (Grant No. 2020JJ4517), the Research Foundation of Education Bureau of Hunan Province, China (Grant Nos. 19A434, 19A433, and 19C1621), and the Opening Project of Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China (Grant Nos. 2019KFY10 and 2019KFY09).

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摘要： This work examines the origin of the abnormal magnetism exhibited by CuMnFe-PBAs modified with multi-walled carbon nanotubes (MWCNTs). The system of CuMnFe-PBAs@MWCNTs coexists with both large and small clusters. CuMnFe-PBAs clusters have an average particle size of 28 nm, and some of the smaller particles are adsorbed on the surface of MWCNTs. Surprisingly, the magnitude of magnetization increases linearly with decreasing temperature. When above the Curie temperature, the magnitude of magnetization is significantly greater than that of PBAs without being modified. This phenomenon can be attributed to magnetostatic interactions between ultra-fine magnetic nanoparticles adsorbed on the surface of MWCNTs. Using the Monte Carlo method, we simulated the magnetostatic interaction of cylindrical adsorbed particles, and the simulation results are almost identical to those observed experimentally. The results indicate that 0.089 CuMnFe-PBAs clusters per 1 nm2 can be adsorbed onto the surface area of MWCNTs. We demonstrate that MWCNTs adsorbing magnetic particles exhibit magnetic behavior, and suggest a method for producing ultrafine materials. It also introduces a new method of calculating the adsorption efficiency of carbon nanotubes, offering theoretical guidance for future research on nanomaterials with enhanced adsorption efficiency.

关键词: multi-walled carbon nanotubes, prussian blue analogue, Monte Carlo simulation, magnetostatic interaction

Abstract: This work examines the origin of the abnormal magnetism exhibited by CuMnFe-PBAs modified with multi-walled carbon nanotubes (MWCNTs). The system of CuMnFe-PBAs@MWCNTs coexists with both large and small clusters. CuMnFe-PBAs clusters have an average particle size of 28 nm, and some of the smaller particles are adsorbed on the surface of MWCNTs. Surprisingly, the magnitude of magnetization increases linearly with decreasing temperature. When above the Curie temperature, the magnitude of magnetization is significantly greater than that of PBAs without being modified. This phenomenon can be attributed to magnetostatic interactions between ultra-fine magnetic nanoparticles adsorbed on the surface of MWCNTs. Using the Monte Carlo method, we simulated the magnetostatic interaction of cylindrical adsorbed particles, and the simulation results are almost identical to those observed experimentally. The results indicate that 0.089 CuMnFe-PBAs clusters per 1 nm2 can be adsorbed onto the surface area of MWCNTs. We demonstrate that MWCNTs adsorbing magnetic particles exhibit magnetic behavior, and suggest a method for producing ultrafine materials. It also introduces a new method of calculating the adsorption efficiency of carbon nanotubes, offering theoretical guidance for future research on nanomaterials with enhanced adsorption efficiency.

Key words: multi-walled carbon nanotubes, prussian blue analogue, Monte Carlo simulation, magnetostatic interaction

中图分类号:  (Studies of specific magnetic materials)

  • 75.50.-y
75.75.-c (Magnetic properties of nanostructures) 76.80.+y (M?ssbauer effect; other γ-ray spectroscopy) 02.70.Uu (Applications of Monte Carlo methods)