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Effect of Layer Charge Density on the Exfoliation of Montmorillonite to Prepare Two-Dimensional Nanosheets
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Renbo GAO1, 2, Yunliang ZHAO1, 2, Licai CHEN1, 2, Tingting ZHANG3, Haoyu BAI1, 2, Shaoxian SONG1, 2
Journal of the Chinese Ceramic Society | 2021, 49(7) : 1420 - 1428
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Journal of the Chinese Ceramic Society | 2021, 49(7): 1420-1428
• Special Issue on Mineral Material •
Effect of Layer Charge Density on the Exfoliation of Montmorillonite to Prepare Two-Dimensional Nanosheets
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Renbo GAO1, 2, Yunliang ZHAO1, 2, Licai CHEN1, 2, Tingting ZHANG3, Haoyu BAI1, 2, Shaoxian SONG1, 2
Affiliations
  • 1.Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan 430070, China
  • 2.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
  • 3.School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China

    • GAO Renbo(1997-), male, Master candidate. E-mail:

About Author:

GAO Renbo(1997-), male, Master candidate. E-mail:

Published: 2021-07-20 doi: 10.14062/j.issn.0454-5648.20210134
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Two typical montmorillonite samples, with layer charge densities of 0.342 and 0.439, measured by using alkylammonium method, were selected in this study. The effects of layer charge density on the two-dimensional (2D) exfoliation of montmorillonite and the surface electrical properties of the nanosheets after exfoliation were studied. The mechanisms of the exfoliation and hydration swelling ability of montmorillonite were explained using molecular dynamics simulation. It was found that montmorillonite with relatively low layer charge density exhibited stronger hydration and swelling ability and thus was easier to be exfoliated into 2D nanosheets. The exfoliated 2D nanosheets from the montmorillonite with higher layer charge density had larger electronegativity per unit area. The lower layer charge density of montmorillonite, the weaker adsorption of water molecules on the surface of montmorillonite crystal layer, the stronger interlayer cation hydration and greater hydration swelling ability, could be used to explain the fact that the montmorillonite with low layer charge density was more easily exfoliated into 2D nanosheets.

montmorillonite  /  layer charge density  /  exfoliation  /  2D nanosheets  /  molecular dynamics simulation
高仁波, 赵云良, 陈立才, 张婷婷, 白皓宇, 宋少先. 蒙脱石层电荷密度对其二维纳米片剥离的影响. 硅酸盐学报, 2021 , 49 (7) : 1420 -1428 . DOI: 10.14062/j.issn.0454-5648.20210134
Renbo GAO, Yunliang ZHAO, Licai CHEN, Tingting ZHANG, Haoyu BAI, Shaoxian SONG. Effect of Layer Charge Density on the Exfoliation of Montmorillonite to Prepare Two-Dimensional Nanosheets[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (7) : 1420 -1428 . DOI: 10.14062/j.issn.0454-5648.20210134
Appendix
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Year 2021 volume 49 Issue 7
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Article Info
doi: 10.14062/j.issn.0454-5648.20210134
  • Receive Date：2021-02-17
  • Online Date：2026-10-30
  • Published：2021-07-20
Article Data
Affiliations
History
  • Received：2021-02-17
  • Revised：2021-03-06
Funding
Affiliations
    1.Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan 430070, China
    2.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
    3.School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China

Corresponding:

ZHAO Yunliang(1987-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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