Saturated adsorption capacities of graphene aerogels on organics

Hui e LIU; Yangfan HUANG; Yanbing MA; Shuang CHEN

doi:10.11949/j.issn.0438-1157.20180603

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Saturated adsorption capacities of graphene aerogels on organics

Material science and engineering, nanotechnology | 更新时间：2020-06-24

- Saturated adsorption capacities of graphene aerogels on organics
- CIESC Journal Vol. 70, Issue 1, Pages: 280-289(2019)
- 作者机构：
  
  中国石油大学(华东)重质油国家重点实验室，山东青岛 266580
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180603
  CLC： O 647.3
- Received：01 June 2018，
  
  Revised：2018-11-05，
  
  Published：05 January 2019
- 稿件说明：
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刘会娥, 黄扬帆, 马雁冰, 陈爽. 石墨烯基气凝胶对有机物的饱和吸附能力[J]. 化工学报, 2019, 70(1): 280-289

LIU Hui e, HUANG Yangfan, MA Yanbing, CHEN Shuang. Saturated adsorption capacities of graphene aerogels on organics[J]. CIESC Journal, 2019, 70(1): 280-289
刘会娥, 黄扬帆, 马雁冰, 陈爽. 石墨烯基气凝胶对有机物的饱和吸附能力[J]. 化工学报, 2019, 70(1): 280-289 DOI： 10.11949/j.issn.0438-1157.20180603.

LIU Hui e, HUANG Yangfan, MA Yanbing, CHEN Shuang. Saturated adsorption capacities of graphene aerogels on organics[J]. CIESC Journal, 2019, 70(1): 280-289 DOI： 10.11949/j.issn.0438-1157.20180603.

摘要

以Pickering乳液法进行了石墨烯基气凝胶(GA)的制备，并以纯有机物和水中乳化油分为吸附对象，对其饱和吸附能力进行了评价，综合对比了不同研究者利用碳纳米材料所制备碳基气凝胶对纯有机化合物的吸附能力，发现包含本文所制备的GA在内的各种碳基气凝胶对不同的有机物的吸附能力与有机物的密度成正比，表明单位质量碳基气凝胶吸附有机物的体积(cm

∙g

-1

)为定值，与具体的被吸附有机物的种类无关。推断有机物在气凝胶材料中的吸附是一种体积填充行为，气凝胶孔隙体积的大小对于其吸附有机物的能力具有重要影响，但孔隙的占有率也是决定实际吸附有机物能力的关键因素。所制备的GA对水中油分的吸附能力低于其对纯油分的吸附能力，应与水的竞争吸附、有机物的扩散阻力等有关。

Abstract

Graphene aerogel (GA) was prepared through Pickering emulsion method. Pure organic compounds and oil emulsion in water were used as substances to be absorbed by GA. Saturated adsorption capacities were observed for the GA prepared in this work and for carbon aerogels from other researchers. It was found that the saturated adsorption capacities of almost all the carbon aerogels were directly proportional to densities of the organics

indicating constant adsorption volume of organics exists for certain carbon aerogel

independent of the kind of organics. It is expected that the adsorption of organics by carbon aerogels is a volume filling process

so that higher pore volume of aerogels favors the saturated adsorption abilities of organics. However

occupancy of pores

or the filling percent of pores by organics is also an important determining factor. The prepared GA has lower adsorption capacity for oil in water than its adsorption capacity for pure oil

and should be related to competitive adsorption of water and diffusion resistance of organic matter.

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