Inorganic Chemicals Industry ›› 2024, Vol. 56 ›› Issue (8): 19-26.doi: 10.19964/j.issn.1006-4990.2023-0619

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress on preparation of 2D vermiculite nanosheets and their environmental adsorption of pollutants

XIONG Chengrong1,2(), CHEN Yan1, TANG Miao1, ZHANG Fengze1, ZHOU Tianxiang1, OUYANG Ruifeng1, DONG Gang1, SHI Wei1,2, ZENG Tao1,2, CHEN Yunxia1,2, SU Xiaoli1,2,3()   

  1. 1.School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,China
    2.Jingdezhen Key Laboratory of Environmental Ceramic Materials,Jingdezhen 333403,China
    3.Jiangxi Key Laboratory of Advanced Ceramic Materials,Jingdezhen 333403,China
  • Received:2023-12-26 Online:2024-08-10 Published:2024-09-26
  • Contact: SU Xiaoli E-mail:1455525032@qq.com;quickly985@163.com

Abstract:

Vermiculite(Vrm) is a layered silicate mineral with unique physical and chemical properties such as layered structure,interlayer ion exchangeability,large specific surface area,and nano⁃layer interlayer space.It is widely distributed,abundant in reserves and low in price.Vrm is thus a good environmental adsorbent material for pollutant removal from water bodies.Due to the stacking of vermiculite flake layers,the huge internal specific surface is difficult to be exposed,which limits its adsorption capacity for pollutants.Exfoliating natural vermiculite into two⁃dimensional nanoflakes with nanoscale thickness is an effective way to obtain the huge internal specific surface area and improve its adsorption performance.In this paper,the preparation methods of 2D vermiculite nanosheets in recent years were reviewed,including thermal expansion exfoliating pretreatment method,physical exfoliating method,chemical exfoliating method,and combined physical-chemical exfoliating technology,and the advantages and disadvantages of these methods were summarized and compared.The research progress on the adsorption properties of exfoliated vermiculite to some water pollutants was briefly described.The purpose of this paper was to provide ideas for seeking the high yield exfoliating method of vermiculite and the high value⁃added application of exfoliated vermiculite in environmental adsorption.Finally,the development trend of 2D vermiculite materials was prospected.

Key words: vermiculite, two?dimensional materials, exfoliation, nanosheet, adsorption

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