Preparation of Reduced Graphene Oxide/TiO2 Nanowires Composite Film and Its Adsorption Performance for Cu2+

Abstract

Abstract: The composite film of reduced graphene oxide/TiO₂ nanowires(rGO/TiO₂ NWs) was prepared by two-step hydrothermal method united vacuum filtration using graphene and self-prepared TiO₂ powder as raw materials. The sample was characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffractometer (XRD) and Raman spectroscopy. The results show that reduced graphene oxide and TiO₂ NWs are successfully compounded, and the dispersion of TiO₂ NWs are good. The adsorption experiments of Cu²⁺ show that the proportion of TiO₂ NWs in the composite, pH values are the important factors affecting the Cu²⁺ adsorption, the adsorption of Cu²⁺on the composite should be studied near neutral environment with pH=6.0. While containing 50% TiO₂ NWs, the adsorption capacity of the composite film for Cu²⁺ is 4 times of rGO film. The composite film has good adsorption stability, and the adsorption rate still retains 91% of the original adsorption after 5 times of reuse.

Key words: reduced graphene oxide, TiO₂ nanowire, two-step hydrothermal method, vacuum filtration, composite film, Cu²⁺, adsorption

CLC Number:

O643

LIN Xiaoxia, LI Hui, FU Degang. Preparation of Reduced Graphene Oxide/TiO₂ Nanowires Composite Film and Its Adsorption Performance for Cu²⁺[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(2): 318-324.

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Preparation of Reduced Graphene Oxide/TiO₂ Nanowires Composite Film and Its Adsorption Performance for Cu²⁺

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