Volume 36 Issue 1
Feb.  2021
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Article Contents
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

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

doi: 10.1016/S1872-5805(21)60013-6
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
  • Author Bio:

    WANG Sen, Ph. D. E-mail: senwang@dicp.ac.cn

  • Corresponding author: SUN Cheng-lin, Professor. E-mail: clsun@dicp.ac.cn; WU Zhong-Shuai, Professor. E-mail: wuzs@dicp.ac.cn
  • Received Date: 2021-01-13
  • Rev Recd Date: 2021-01-20
  • Available Online: 2021-02-03
  • Publish Date: 2021-02-02
  • Three-dimensional (3D) graphene aerogels (GAs) with a tunable pore structure, a highly accessible surface area, and exceptional compressibility, elasticity and wettability have been explored as promising absorbents for efficient oil/water separation. However, the strategies for assembling 3D GAs usually involve a high-temperature process, resulting in high cost. We report the synthesis of a 3D porous polyoxometalate (POM)-hybridized GA (POM-GA) as a highly efficient and recyclable absorbent for oil/water separation. The material was fabricated at room temperature by the self-assembly and reduction of graphene oxide using POM as a functional cross-linker and hydrazine hydrate as a reductant. It had a 3D interconnected macroporous structure, a large specific surface area, and exceptional compressibility, elasticity and wettability, and had excellent absorption capacities of 100-210 g g−1 for the rapid removal of various organic pollutants from water, outperforming most of the previously reported graphene-based macro-assemblies synthesized at high temperatures. Moreover, the absorbed oils can be readily removed by squeezing or first squeezing and then burning the remaining organic from the 3D POM-GA. The oil-absorption capacity retention rates of the 3D POM-GA are 96 and 90% after 10 absorbing-squeezing and absorbing-squeezing-burning cycles, respectively. The material therefore has great potential for efficient oil/water separation with wide applicability and excellent durability.
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  • Video S3 removal dichloromethane from water bottom.mp4
    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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