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Preparation of 3D graphene-carbon nanotubes-magnetic hybrid aerogels for dye adsorption

Zu Rong Ang Ing Kong Rachel Shin Yie Lee Cin Kong Akesh Babu Kakarla Ai Bao Chai Wei Kong

ZuRong Ang, IngKong, RachelShin Yie Lee, CinKong, AkeshBabu Kakarla, AiBao Chai, WeiKong. 三维石墨烯-碳纳米管磁性气凝胶的制备及其染料吸附性能[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60029-X
引用本文: ZuRong Ang, IngKong, RachelShin Yie Lee, CinKong, AkeshBabu Kakarla, AiBao Chai, WeiKong. 三维石墨烯-碳纳米管磁性气凝胶的制备及其染料吸附性能[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60029-X
Zu Rong Ang, Ing Kong, Rachel Shin Yie Lee, Cin Kong, Akesh Babu Kakarla, Ai Bao Chai, Wei Kong. Preparation of 3D graphene-carbon nanotubes-magnetic hybrid aerogels for dye adsorption[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60029-X
Citation: Zu Rong Ang, Ing Kong, Rachel Shin Yie Lee, Cin Kong, Akesh Babu Kakarla, Ai Bao Chai, Wei Kong. Preparation of 3D graphene-carbon nanotubes-magnetic hybrid aerogels for dye adsorption[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60029-X

三维石墨烯-碳纳米管磁性气凝胶的制备及其染料吸附性能

doi: 10.1016/S1872-5805(21)60029-X
详细信息
    通讯作者:

    Ing Kong, 副教授. E-mail: I.Kong@latrobe.edu.au

Preparation of 3D graphene-carbon nanotubes-magnetic hybrid aerogels for dye adsorption

Funds: The authors gratefully acknowledge the facilities, the scientific and technical assistance of Engineering Research Department, University of Nottingham Malaysia Campus and School of Applied Physics, National University of Malaysia
More Information
  • 摘要: 将ZnCl2、NiCl2·6H2O、FeCl2·4H2O和FeCl3·6H2O分别加入氧化石墨烯和碳纳米管的悬浮液中,在碱性条件下共沉淀和水中与聚乙烯醇交联后,冷冻干燥制备气凝胶。制备的气凝胶由磁性Ni0.5Zn0.5Fe2O4纳米粒子、氧化石墨烯、碳纳米管和聚乙烯醇组成,不仅具有吸附染料分子的活性位点,而且可通过外加磁场从水中分离。在最佳质量比下,制备的气凝胶对亚甲基蓝具有高的吸附容量(qe=71.03 mg g−1)和中等磁性强度(MS=3.519 emu g−1)。在染料浓度为0.025 mg mL−1的条件下,气凝胶对亚甲基蓝、甲基橙、结晶紫及其相等质量的混合物的去除效率分别为70.1%、4.2%、8.9%和11.1%。本气凝胶重复使用3次后,再生效率仍超过82%。此外,它对生物体无毒,有望用作处理工业废水的吸附剂。
  • Figure  1.  Schematic of 3DmGT-PVA aerogel fabrication.

    Figure  2.  (a) Optical photographs of 3DmGT-PVA aerogels. FESEM images of aerogels: (b) F1 aerogel with pores, (c) F3 aerogel with 1500× and (d) 60000× magnification and (e) F6 aerogel.

    Figure  3.  XRD patterns of (a) PVA, (b) GT, (c) Ni0.5Zn0.5Fe2O4 nanoparticles and (d) F3 aerogel.

    Figure  4.  TGA curves of aerogels.

    Figure  5.  VSM magnetization curves for aerogels.

    Figure  6.  (a) MB solutions before and after the treatment by F3 aerogel and GT for 48 h, (b) UV-Vis spectra of MB solutions treated by aerogels and GT and (c) bar chart of qe and η for aerogels and GT.

    Figure  7.  The dye removal efficiency (η) and adsorption capacity (qe ) per mass of F3 aerogel against its mass loading.

    Figure  8.  η and qe against the pH value of MB solutions.

    Figure  9.  (a) qt against t, (b) the pseudo-first-order kinetic model and (c) the pseudo-second-order kinetic model.

    Figure  10.  Adsorption-desorption cycles.

    Figure  11.  Bar chart of η for dyes involved.

    Figure  12.  The effect of F3 on the overall lifespan of C. elegans. F3 does not significantly shorten the basal lifespan of the worm population (p>0.05), (n=90). Data are presented as mean ± standard deviation of one representative replicate.

    Table  1.   Saturation magnetization (MS), coercivity (HC) and retentivity (MR) at room temperature for the aerogels.

    SampleMS (emu g−1)HC (G)MR (emu g−1)
    F12.5352.1810.000937
    F22.8084.7760.00203
    F33.5198.6510.00338
    F44.5841.4980.00211
    F56.0291.1690.00237
    F610.2931.0770.00278
    Ni0.5Zn0.5Fe2O410.6960.6250.00252
    下载: 导出CSV

    Table  2.   Kinetic parameters for F3 aerogel.

    Kinetic modelsParametersValue
    Pseudo first- orderqe (mg g−1)66.87
    qe error (%)5.85
    k1 (L min−1)0.0109
    R20.9453
    Pseudo second-orderqe (mg g−1)84.75
    qe error (%)19.3
    k2 (g mg−1 min−1)0.00016
    R20.9528
    V0 (mg g−1 min−1)1.15
    下载: 导出CSV
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  • 收稿日期:  2020-05-29
  • 修回日期:  2020-07-30
  • 网络出版日期:  2021-03-17

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