以石墨烯与粘土间的插层实现石墨烯片层的稳定分散

李静; 崔锦灿; 杨真真; 邱汉迅; 唐志红; 杨俊和

doi:10.1016/S1872-5805(18)60323-3

以石墨烯与粘土间的插层实现石墨烯片层的稳定分散

doi: 10.1016/S1872-5805(18)60323-3

上海理工大学材料科学与工程学院, 上海 200093

基金项目: 国家自然科学基金（U1260104，U1560108，51272157）.

详细信息

作者简介:
李静,副教授,硕士生导师.E-mail:lijing6080@usst.edu.cn

通讯作者:
杨俊和,教授,博士生导师.E-mail:jhyang@usst.edu.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2017-10-11
- 录用日期: 2018-02-11
- 修回日期: 2018-01-18
- 刊出日期: 2018-02-28

Stabilizing graphene layers by intercalating laponite between them

School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Funds: National Natural Science Foundation of China (U1260104, U1560108, 51272157).

摘要

摘要: 氧化石墨烯的还原反应将导致石墨烯片层的复叠和团聚，使其在水分散液中发生沉淀。本文采用粘土胶体帮助还原氧化石墨烯在水中的稳定分散，并阻止石墨烯片层的复叠。氧化石墨烯水分散液与粘土胶体相混合之后，在微波辅助条件下，对氧化还石墨烯进行还原。当粘土与还原氧化石墨烯的质量比是1：1时，混合液的分散稳定性最好。XRD图谱中还原氧化石墨烯的（002）峰消失，可见石墨烯片层没有发生复叠。还原氧化石墨烯与粘土片层之间，由于静电相互作用和空间位阻效应，形成了插层结构。由透射电镜观察可知，还原氧化石墨烯表面均匀分布着粘土片层。粘土与还原氧化石墨烯的混合物的比表面积高于还原氧化石墨烯17.6%。这种物理插层法为石墨烯片层的稳定分散提供了另一种思路。
- 石墨烯 /
- 粘土 /
- 水分散液 /
- 稳定性 /
- 插层
Abstract: The reduction of graphene oxide (GO) leads to the re-stacking/agglomeration of graphene layers, which results in their precipitation from an aqueous dispersion. A laponite colloid was used to prevent re-stacking and stabilize an aqueous dispersion of reduced graphene oxide (RGO) by dispersing GO in the colloid, followed by reduction with hydrazine hydrate under microwave radiation. Results indicate that re-stacking is prevented as proven by the disappearance of the RGO (002) peaks in the XRD pattern. A laponite/RGO (w/w:1:1) dispersion shows the highest stability under centrifugation at 10 000 rpm and the largest Brunauer-Emmett-Teller surface area, which is 17.6% higher than that of RGO and 34.4% higher than laponite. Electrostatic interaction between negatively-charged RGO layers and positively-charged laponite edges lead to an intercalation structure, which is responsible for the non-stacking RGO and its stable dispersion in water. This intercalation method offers an alternative way for the dispersion of graphene layers.
- Graphene /
- Laponite /
- Aqueous dispersion /
- Stability /
- Intercalation

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参考文献(19)

Li D, Mueller M B, Gilje S, et al. Processable aqueous dispersions of graphene nanosheets[J]. Nat Nanotechnol, 2008, 3:101-105.

Stankovich S, Piner R D, Chen X, et al. Stable aqueous dispersions of graphitic nanoplatelets via the reduction of exfoliated graphite oxide in the presence of poly(sodium 4-styrenesulfonate)[J]. J Mater Chem, 2006, 16:155-158.

Yang H, Li F, Shan C, et al. Covalent functionalization of chemically converted graphene sheets via silane and its reinforcement[J]. J Mater Chem, 2009, 19:4632-4638.

Li J, Yang Z, Qiu H, et al. Microwave-assisted simultaneous reduction and titanate treatment of graphene oxide[J]. J Mater Chem A, 2013, 1:11451-11456.

Lotya M, Hernandez Y, King P J, et al. Liquid phase production of graphene by exfoliation of graphite in surfactant/water solutions[J]. J Am Chem Soc, 2009, 131:3611-3620.

Grandjean J, Laszlo P. Microdynamics of exchangeable lithium and sodium ions in laponite gels[J]. J Magn Reson, 1991, 92:404-408.

Loginov M, Lebovka N, Vorobiev E. Laponite assisted dispersion of carbon nanotubes in water[J]. J Colloid Interface Sci, 2012, 365:127-136.

Alhassan S M, Qutubuddin S, Schiraldi D A.Graphene arrested in laponite-water colloidal glass[J]. Langmuir, 2012, 28:4009-4015.

Nethravathi C, Viswanath B, Shivakumara C, et al. The production of smectite clay/graphene composites through delamination and co-stacking[J]. Carbon, 2008, 46:1773-1781.

Zhang C, Tjiu W W, Fan W, et al. Aqueous stabilization of graphene sheets using exfoliated montmorillonite nanoplatelets for multifunctional free-standing hybrid films via vacuum-assisted self-assembly[J]. J Mater Chem, 2011, 21:18011-18017.

Yoo J, Lee S B, Lee C K, et al. Graphene oxide and laponite composite films with high oxygen-barrier properties[J]. Nanoscale, 2014, 6:10824-10830.

Spyrou K, Potsi G, Diamanti E K, et al. Towards novel multifunctional pillared Nanostructures:Effective intercalation of Adamantylamine in graphene oxide and smectite clays[J]. Adv Funct Mater, 2014, 24:5841-5850.

Bagri A, Mattevi C, Acik M, et al. Structural evolution during the reduction of chemically derived graphene oxide[J]. Nat Chem, 2010, 2:581-587.

Pálková H, Madejová J, Zimowska M, et al. Laponite-derived porous clay heterostructures:Ⅱ. FTIR study of the structure evolution[J]. Micropor Mesopor Mat, 2010, 127:237-244.

Daniel L M, Frost R L, Zhu H Y. Edge-Modification of Laponite with Dimethyl-octylmethoxysilane[J]. J Colloid Interface Sci, 2008, 321:302-309.

Aboutalebi S H, Gudarzi M M, Zheng Q B, et al. Spontaneous formation of liquid crystals in ultralarge graphene oxide dispersions[J]. Adv Funct Mater, 2011, 21:2978-2988.

Medhekar N V, Ramasubramaniam A, Ruoff R S, et al. Hydrogen bond networks in graphene oxide composite paper:structure and mechanical properties[J]. ACS Nano, 2010, 4:2300-2306.

Avery R G, Ramsay J D F. Colloidal properties of synthetic hectorite clay dispersions:Ⅱ. light and small angle neutron scattering[J]. J Colloid Interface Sci, 1986, 109:448-454.

YANG Z, ZHENG Q, QIU H, et al. A simple method for the reduction of graphene oxide by sodium borohydride with CaCl₂ as a catalyst[J]. New Carbon Materials, 2015, 30:41-47.

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