Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, 467004, China; Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, 467004, China; Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
Colloids Surf B Biointerfaces. 2021 Apr;200:111605. doi: 10.1016/j.colsurfb.2021.111605. Epub 2021 Feb 3.
Graphene oxide (GO) and GO-based materials have shown excellent adsorption properties because of bounteous structure and rich oxygen functional groups. Many studies have shown that GO are utilized as adsorbents to remove organic dyes from wastewater. GO was prepared by modified Hummers method using graphite powder as raw material. On this basis, β-cyclodextrin/graphene oxide composite (β-CD/GO) was prepared by modifying graphene oxide via β-cyclodextrin(β-CD) crosslinking method. GO and β-CD were characterized by Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray (XRD), scanning electron (SEM) and thermogravimetric analysis (TGA). Their adsorbents properties have been studied with methylene blue (MB) as adsorbate. The factors affecting the study include the temperature, adsorption time, amount of adsorbent and system pH value. Adsorption isotherm and kinetics of the adsorption process are systematically analyzed. The results show that β-CD/GO has a different adsorption capacity from GO under the same adsorption factors. Under the optimized conditions (the reaction temperature is 70 °C, the reaction time is 60 min and the concentration of adsorbent is 0.04 g/L), the removal efficiency of β-CD/GO is 20% higher than that of GO from 70% to 90%. The maximum adsorption capacity of β-CD/GO is 76.4 mg/g. β-CD/GO can be effectively regenerated by elution with absolute alcohol. In these tests, β-CD/GO was suggested to be more efficient than GO in the removal of organic dyes.
氧化石墨烯（GO）及其基材料因其丰富的结构和丰富的含氧官能团而表现出优异的吸附性能。许多研究表明，GO 可用作吸附剂从废水中去除有机染料。GO 通过以石墨粉为原料的改良 Hummers 法制备。在此基础上，通过β-环糊精（β-CD）交联法对氧化石墨烯进行修饰，制备了β-环糊精/氧化石墨烯复合材料（β-CD/GO）。GO 和β-CD 通过傅里叶变换红外光谱（FT-IR）、能量色散 X 射线（XRD）、扫描电子显微镜（SEM）和热重分析（TGA）进行了表征。用亚甲基蓝（MB）作为吸附物研究了它们的吸附剂性能。影响研究的因素包括温度、吸附时间、吸附剂用量和体系 pH 值。系统分析了吸附过程的吸附等温线和动力学。结果表明，在相同的吸附因素下，β-CD/GO 的吸附容量与 GO 不同。在优化条件下（反应温度为 70°C，反应时间为 60 分钟，吸附剂浓度为 0.04g/L），β-CD/GO 的去除效率比 GO 从 70%提高到 90%时高 20%。β-CD/GO 的最大吸附容量为 76.4mg/g。β-CD/GO 可以用无水乙醇洗脱有效地再生。在这些测试中，β-CD/GO 被认为比 GO 更有效地去除有机染料。
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