Volume 40 Issue 10
Oct.  2023
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HE Naipu, ZHANG Xuehui, ZHAO Xuerui, et al. Preparation and performance of graphene oxide/ZIF-7 composites[J]. Acta Materiae Compositae Sinica, 2023, 40(10): 5707-5716. doi: 10.13801/j.cnki.fhclxb.20221228.001
Citation: HE Naipu, ZHANG Xuehui, ZHAO Xuerui, et al. Preparation and performance of graphene oxide/ZIF-7 composites[J]. Acta Materiae Compositae Sinica, 2023, 40(10): 5707-5716. doi: 10.13801/j.cnki.fhclxb.20221228.001

Preparation and performance of graphene oxide/ZIF-7 composites

doi: 10.13801/j.cnki.fhclxb.20221228.001
Funds:  Science and Technology Plan of Gansu Province (20YF8GA032)
  • Received Date: 2022-11-09
  • Accepted Date: 2022-12-15
  • Rev Recd Date: 2022-12-13
  • Available Online: 2022-12-29
  • Publish Date: 2023-10-15
  • ZIF-7 crystals were in situ grown on graphene oxide (GO) by three synthetic routes, and the resulting graphene oxide/ZIF-7 composites (GZR-n) were characterized by PXRD, FTIR, SEM, TEM, and N2 isothermal adsorption-desorption. The effects of the synthetic routes on the growth, crystallinity, microscopic morphology and pore size of ZIF-7 crystals on GO were investigated. ZIF-7 crystals were grown on the surface and sheet of GO by three synthetic routes. The crystallinity of ZIF-7 crystals on GZR-n was significantly enhanced and some were wrapped by GO. The shape and size of ZIF-7 crystals growing on GZR-n were modulated by the synthesis routes. In particular, the ZIF-7 crystals are spherical particle with a diameter of 50 nm in GZR-II. For GZR-I and GZR-III, the ZIF-7 crystals are regular polyhedron with a size of 200 nm. Additional, their dispersion properties in solvents, adsorption properties and kinetic simulations for organic dyes were explored. GZR-n show good dispersion in methanol and chloroform. Compared with ZIF-7 crystals, the adsorption capacities of GZR-I, GZR-II and GZR-III for methylene blue are increased by 226%, 302% and 278%, respectively. The kinetic simulations indicate that the adsorption of GZR-II and GZR-III for methylene blue are chemisorption and that of GZR-I is physical adsorption.


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