以氧化石墨烯为前驱体,银纳米线(AgNWs)为支撑单元,采用两步水热法制备了相互搭接、相互支撑的三维多孔石墨烯/AgNWs复合气凝胶,并考察了氧化石墨烯与AgNWs质量比对复合气凝胶吸附性能的影响。傅里叶变换红外光谱仪、扫描电子显微镜、透射电子显微镜和X射线衍射等表征结果表明:AgNWs的支撑作用可有效防止石墨烯片层的堆叠,形成多孔结构。当石墨烯与AgNWs质量比为2∶1时,复合气凝胶对四氯化碳的吸附量高达91.33g/g,复合材料表现出优异的吸附性能,具有潜在的应用价值。
Graphene/silver nanowire (graphene/AgNWs) composite aerogels with 3D porous structure were prepared by two-step hydrothermal method using graphene oxide(GO) as precursor and silver nanowire (AgNWs) as support unit.And,the effect of the mass ratio of GO to AgNWs on the adsorption properties of the aerogels were also investigated.The structure and morphology of the aerogels were characterized by FT-IR,SEM,TEM and XRD.The support of AgNWs can effectively prevent the stacking of graphene sheets and formed more pores.The adsorption capacity of the aerogels to carbon tetrachloride can reach 91.33g/g when the mass ratio of graphene to AgNWs was 2∶1.Therefore,the aerogels shown excellent adsorption performance and had potential application value.
[1] Peng Yongjin,He X,Wu Q,et al.A new recyclable crosslinked polymer combined polyurethane and epoxy resin[J].Polymer,2018,149:154-143.
[2] Kang W,Kang X,Lashari Z A,et al.Progress of polymer gels for conformance control in oilfield[J].Advances in Colloid and Interface Science,2021,289:1023631-1023646.
[3] Chu Y,Pan Q.Three-dimensionally macroporous Fe/C nanocomposites as highly selective oil-absorption materials[J].ACS Applied Materials & Interfaces,2012,4(5):2420-2425.
[4] Yuan J,Liu X,Akbulut O,et al.Superwetting nanowire membranes for selective absorption[J].Nature Nanotechnology,2008,3:332-336.
[5] Wu C,Huang X,Wu X,et al.Mechanically flexible and multifunctional polymer-based graphene foams for elastic conductors and oil-water separators[J].Advanced Materials,2013,25(39):5658-5662.
[6] Nardecchia S,Carriazo D,Ferrer M L,et al.Three dimensional macroporous architectures and aerogels built of carbon nanotubes and/or graphene:synthesis and applications[J].Chemical Society Reviews,2013,42:794-830.
[7] Huang Y,Wang C,Shao C,et al.Graphene oxide assemblies for sustainable clean-water harvesting and green-electricity generation[J].Accounts of Materials Research,2021,2(2):97-107.
[8] Sha J,Salvatierra R V,Dong P,et al.Three-dimensional rebar graphene[J].ACS Applied Materials & Interfaces,2017,9:7376-7384.
[9] Dai C,Sun W,Xu Z,et al.Assembly of ultralight dual network graphene aerogel with applications for selective oil absorption[J].Langmuir,2020,36(45):13698-13707.
[10] 余朝润,臧鹏飞,杨乾,等.埃洛石-氧化石墨烯杂化气凝胶的构建及应力传递行为研究[J].化工新型材料,2022,50(5):195-200.
[11] Guo S,Yuan H,Liu F,et al.Sliver nanowires interlocked graphene aerogel for ultra-high efficient clearage of oil pollution on water[J].Sustainable Materials and Technologies,2021,29:285-291.
[12] Sun H,Xu Z,Gao C.Multifunctional,ultra-flyweight,synergistically assembled carbon aerogels[ J].Advanced Materials,2013,25(18):2554-2560.
[13] Afroze J D,Tong L,Abden M J,et al.Hierarchical honeycomb graphene aerogels reinforced by carbon nanotubes with multifunctional mechanical and electrical properties[J].Carbon,2021,175:312-321.
[14] Zhao D,Yu L,Liu D.Ultralight graphene/carbon nanotubes aerogels with compressibility and oil absorption properties[J].Materials,2018,11(4):641-650.
[15] 许文龙,陈爽,张津红,等.羧甲基纤维素-石墨烯复合气凝胶的制备及吸附研究[J].材料工程,2020,48(9):81-89.
[16] Cao X,Zhang J,Chen S,et al.1D/2D nanomaterials synergistic,compressible,and response rapidly 3D graphene aerogel for piezoresistive sensor[J].Advanced Functional Materials,2020,30:2003618-2003627.
[17] Zhang R,Hu R,Li X,et al.A bubble-derived strategy to prepare multiple graphene-based porous materials[J].Advanced Functional Materials,2018,28:1705879.
[18] Gao Y,Wang W,Song N,et al.Fabrication of highly flexible transparent conductive film with a sandwich-structure consisted of graphene/silver nanowire/graphene[J].Journal of Materials Science Materials in Electronics,2017,28(22):17031-17037.
[19] 高亚辉.超声波辅助超临界CO2流体制备石墨烯及其在柔性电极和复合材料中的应用研究[D].上海:上海交通大学,2016.
[20] Gu J,Fan H,Li C,et al.Robust superhydrophobic/superoleophilic wrinkled microspherical MOF@RGO composites for efficient oil-water separation[J].Angewandte Chemie International Edition,2019,58:5297-5301.
基金资助
国家自然科学基金(21968031);河南省高等学校重点科研项目(22A150048,21A150035);河南省科技攻关项目(222102240012);河南省自然科学基金(212300410207);洛阳理工学院国家自然科学基金预研项目(2018YZ11)
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