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A three-dimensional polyoxometalate/graphene aerogel as a highly efficient and recyclable absorbent for oil/water separation

WANG Sen WANG Xiao SHI Xiao-yu MENG Cai-xia SUN Cheng-lin WU Zhong-Shuai

王森, 王潇, 师晓宇, 孟彩霞, 孙承林, 吴忠帅. 三维多金属氧酸盐/石墨烯气凝胶作为高效可回收的油水分离吸收剂[J]. 新型炭材料, 2021, 36(1): 189-197. doi: 10.1016/S1872-5805(21)60013-6
引用本文: 王森, 王潇, 师晓宇, 孟彩霞, 孙承林, 吴忠帅. 三维多金属氧酸盐/石墨烯气凝胶作为高效可回收的油水分离吸收剂[J]. 新型炭材料, 2021, 36(1): 189-197. doi: 10.1016/S1872-5805(21)60013-6
WANG Sen, WANG Xiao, SHI Xiao-yu, MENG Cai-xia, SUN Cheng-lin, WU Zhong-Shuai. A three-dimensional polyoxometalate/graphene aerogel as a highly efficient and recyclable absorbent for oil/water separation[J]. NEW CARBOM MATERIALS, 2021, 36(1): 189-197. doi: 10.1016/S1872-5805(21)60013-6
Citation: WANG Sen, WANG Xiao, SHI Xiao-yu, MENG Cai-xia, SUN Cheng-lin, WU Zhong-Shuai. A three-dimensional polyoxometalate/graphene aerogel as a highly efficient and recyclable absorbent for oil/water separation[J]. NEW CARBOM MATERIALS, 2021, 36(1): 189-197. doi: 10.1016/S1872-5805(21)60013-6

三维多金属氧酸盐/石墨烯气凝胶作为高效可回收的油水分离吸收剂

doi: 10.1016/S1872-5805(21)60013-6
详细信息
  • 中图分类号: TB33

A three-dimensional polyoxometalate/graphene aerogel as a highly efficient and recyclable absorbent for oil/water separation

Funds: This work was financially supported by the National Key R@D Program of China (Nos. 2016YFB0100100, 2016YFA0200200), the National Natural Science Foundation of China (Nos. 51872283, 22075279, 21805273, 22005297, 22005298), the Liao Ning Revitalization Talents Program (No. XLYC1807153), the Natural Science Foundation of Liaoning Province, Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science (No. 20180510038), Dalian Innovation Support Plan for High Level Talents (No. 2019RT09), Dalian National Laboratory For Clean Energy (DNL), CAS, DNL Cooperation Fund, CAS (Nos. DNL180310, DNL180308, DNL201912, and DNL201915), DICP (Nos. DICP ZZBS201708, DICP ZZBS201802, DICP I2020032), and China Postdoctoral Science Foundation (Nos. 2019M661141, 2020M680995)
More Information
  • 摘要: 三维石墨烯气凝胶具有可调控的孔结构、大的比表面积、优异的压缩性、弹性和润湿性,是一种高效的油水分离吸附剂。然而,三维石墨烯气凝胶的制备方法通常包括高温过程,导致高成本、能耗高和耗时长。本文以磷钼酸为交联剂和促进剂,水合肼为还原剂,在室温条件下同时将氧化石墨烯还原与自组装,制备出三维多孔的多金属氧酸盐复合石墨烯气凝胶(POM-GA),并证明其是一种高效、可回收的油水分离吸收剂。研究表明,POM-GA具有三维连通的多孔结构、大的比表面积、优异的压缩性、弹性和润湿性,对不同的有机溶剂具有良好的吸附能力(100~210 g g−1),可快速去除水中的各种有机污染物,优于先前报道的大多数高温合成的石墨烯基宏观组装体。经10次吸附-挤压和吸附-挤压-燃烧循环后,POM-GA的吸油量保持率分别达到96%和90%。因此,三维POM-GA具有广泛的适用性和优异的耐用性,在高效油水分离方面具有良好的应用前景。
  • Figure  1.  Schematic illustration of the room-temperature assembly of 3D POM-GA.

    Figure  2.  Morphological and structural characterization of 3D POM-GA: (a,b) Photographs of POM-GAs (a) held by a tweezer and (b) supported on a flower, (c) SEM image, (d) nitrogen adsorption and desorption isotherms and the pore size distribution (inset), (e) TGA curve of POM-GA, (f) XRD patterns and (g) Raman spectra of POM-GA and GO.

    Figure  3.  The wettability and mechanical compressibility of 3D POM-GA: (a) photograph of 3D POM-GA under the water, (b) photograph of water and methylbenzene droplets on the surface of 3D POM-GA, (c,d) contact angles of 3D POM-GA with (c) water, and (d) methylbenzene and (e) reversible mechanical compressibility and elasticity of 3D POM-GA.

    Figure  4.  Absorption performance of 3D POM-GA: (a,b) removal of (a) methylbenzene on the water surface and (b) dichloromethane from the water bottom by 3D POM-GA, (c) adsorption capacities for various organic liquids and (d) a comparison of 3D POM-GA with various 3D porous absorbents for absorption of organic solvents.

    Figure  5.  Recyclability of 3D POM-GA: (a) recycling organic solvents from POM-GA by squeezing, and (b) recovery of 3D POM-GA via combustion, and (c,d) absorption capacity of POM-GA versus (c) absorbing-squeezing cycles, and (d) absorbing-squeezing-burning cycles.

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  • Video S3 removal dichloromethane from water bottom.mp4
    支撑材料.pdf
    Video S4 Recycle oil from the POM-GFs by squeezing_Trim.mp4
    Video S5 recovery POM-GFs via combustion_Trim_Trim.mp4
    Video S2 removal methylbenzene on the water surface_Trim.mp4
    Video S1 reversible compressibility_Trim.mp4
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出版历程
  • 收稿日期:  2021-01-13
  • 修回日期:  2021-01-20
  • 网络出版日期:  2021-02-03
  • 刊出日期:  2021-02-01

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