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Dopamine-mediated fabrication of ultralight graphene aerogels with low volume shrinkage
Department环境材料与生态化学研究发展中心
Li LX(李凌霄)1,2; Li BC(李步成)1; Zhang JP(张俊平)1; Zhang JP(张俊平)
2016
Source PublicationJournal of Materials Chemistry A
ISSN2050-7488
Volume4Issue:2Pages:512-518
Abstract

Large volume shrinkage and high temperature are frequently encountered problems during the preparation of graphene aerogels via hydrothermal reactions. Here we report the dopamine-mediated fabrication of ultralight graphene aerogels (UGAs) with low volume shrinkage via hydrothermal reactions at low temperature. The UGAs were fabricated by the hydrothermal reaction of the graphene oxide (GO)/dopamine colloidal solutions at 85 degrees C in the presence of dopamine followed by freeze-drying and pyrolysis. The interaction between GO and dopamine in the aqueous phase, the effects of various parameters on the formation of the UGAs, the roles of dopamine in hydrothermal reactions as well as the wettability and electrical conductivity of the UGAs were investigated using a wide range of analytical techniques. The GO concentration, dopamine concentration, and the temperature and time of the hydrothermal reaction have great influences on the formation of the UGAs. The addition of dopamine forms crosslinking points among the GO sheets and results in the partial reduction of GO in the hydrothermal reaction. In addition, the N atoms of dopamine were doped into the graphene sheets. The UGAs feature low volume shrinkage (8.3%), ultralow density (3.5 mg cm-3), excellent superhydrophobicity/superoleophilicity (CA(water) similar to 155.5 degrees and CA(oil) similar to 0 degrees), very high absorbency for organic liquids (134.0-282.9 g g-1) as well as excellent fire retardant properties and high conductivity (3.07 S cm-1). All these merits make the UGAs very promising materials for absorption of organic pollutants, sensors, energy storage, etc.

Subject Area环境材料与生态化学
DOI10.1039/c5ta08829a
Funding Organizationthe “Hundred Talents Program” of the Chinese Academy of Sciences;the National Natural Science Foundation (51503212)
Indexed BySCI
If8.867
Language英语
Funding Project功能复合材料组
compositor第一作者单位
Citation statistics
Cited Times:66[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/18966
Collection环境材料与生态化学研究发展中心
羰基合成与选择氧化国家重点实验室(OSSO)
Corresponding AuthorZhang JP(张俊平)
Affiliation1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
2.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li LX,Li BC,Zhang JP,et al. Dopamine-mediated fabrication of ultralight graphene aerogels with low volume shrinkage[J]. Journal of Materials Chemistry A,2016,4(2):512-518.
APA Li LX,Li BC,Zhang JP,&张俊平.(2016).Dopamine-mediated fabrication of ultralight graphene aerogels with low volume shrinkage.Journal of Materials Chemistry A,4(2),512-518.
MLA Li LX,et al."Dopamine-mediated fabrication of ultralight graphene aerogels with low volume shrinkage".Journal of Materials Chemistry A 4.2(2016):512-518.
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