还原氧化石墨烯/TiO2纳米线复合膜的制备及对Cu2+吸附性的影响

摘要/Abstract

摘要： 以石墨烯和自制TiO₂粉末为原料,通过两步水热法联合真空抽滤法制备还原氧化石墨烯/TiO₂纳米线(rGO/TiO₂ NWs)复合膜。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、拉曼光谱对rGO/TiO₂ NWs复合膜的形貌、结构进行表征。研究结果表明,还原氧化石墨烯和TiO₂ NWs成功地复合在一起,复合材料中TiO₂ NWs分散性较好。Cu²⁺吸附实验结果表明,复合材料中TiO₂ NWs所占比例、pH值是影响Cu²⁺吸附效果的重要因素,研究复合材料对Cu²⁺的吸附效果应该在pH值为6.0的近中性环境。其中TiO₂ NWs含量为50%时,复合膜对Cu²⁺的吸附量最高,达到rGO薄膜的4倍。复合薄膜有较好的吸附稳定性,重复使用5次后,吸附率是原吸附量的91%。

关键词: 还原氧化石墨烯, TiO₂纳米线, 两步水热法, 真空抽滤, 复合薄膜, Cu²⁺, 吸附

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

中图分类号:

O643

林晓霞, 李慧, 付德刚. 还原氧化石墨烯/TiO₂纳米线复合膜的制备及对Cu²⁺吸附性的影响[J]. 人工晶体学报, 2021, 50(2): 318-324.

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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还原氧化石墨烯/TiO₂纳米线复合膜的制备及对Cu²⁺吸附性的影响

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

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