磁性氧化石墨烯的制备及其对Cu~(2+)的吸附性能
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摘要
制备了一种磁性氧化石墨烯(GO-Fe_3O_4),并对其吸附铜离子(Cu~(2+))的性能进行了研究。研究了不同pH和初始浓度对GO-Fe_3O_4去除Cu~(2+)的影响。研究结果表明:改性四氧化三铁(Fe_3O_4@SiO_2)成功被接枝在GO的边缘,GO与Fe_3O_4@SiO_2质量配合比为4∶1,制得的GO-Fe_3O_4,在303℃,pH为4.5,Cu~(2+)初始质量浓度为124.5mg/L条件下,GO-Fe_3O_4对Cu~(2+)的平衡吸附容量达到76.5mg/g。GO-Fe_3O_4在使用第7次时,对Cu~(2+)吸附容量仍可达到55mg/g,具有良好的吸附性能。
A magnetic GO(GO-Fe_3O_4)was synthesized,and studied its adsorption performance on Cu~(2+).Studying the adsorption capability of Cu~(2+)on GO-Fe_3O_4 under different pH values and initial Cu~(2+)concentrations.The results showed that,Fe_3O_4@SiO_2 was successfully grafted on the edge of GO.The equilibrium adsorption capacity of Cu~(2+)on GO-Fe_3O_4 produced by the mass ratio of GO to Fe_3O_4 @SiO_2 4∶1 was 76.5 mg/g while the reaction temperature was 303℃,the pH value was 4.5 and the initial mass concentration of Cu~(2+)was 124.5 mg/L.After seven time cycle the adsorption capacity of Cu~(2+)on GO-Fe_3O_4 can still reach 55 mg/g,which displayed excellent absorption capacity.
A magnetic GO(GO-Fe_3O_4)was synthesized,and studied its adsorption performance on Cu~(2+).Studying the adsorption capability of Cu~(2+)on GO-Fe_3O_4 under different pH values and initial Cu~(2+)concentrations.The results showed that,Fe_3O_4@SiO_2 was successfully grafted on the edge of GO.The equilibrium adsorption capacity of Cu~(2+)on GO-Fe_3O_4 produced by the mass ratio of GO to Fe_3O_4 @SiO_2 4∶1 was 76.5 mg/g while the reaction temperature was 303℃,the pH value was 4.5 and the initial mass concentration of Cu~(2+)was 124.5 mg/L.After seven time cycle the adsorption capacity of Cu~(2+)on GO-Fe_3O_4 can still reach 55 mg/g,which displayed excellent absorption capacity.
引文
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[10]Stankovich S,Dikin D A,Piner R D,et al.Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide[J].Carbon,2007,45(7):1558-1565.
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[13]Zhao G,Wen T,Chen C,et al.Synthesis of graphene-based nanomaterials and their application in energy-related and environmental-related areas[J].RSC Advances,2012,2(25):9286-9303.
[14]Dreyer D R,Park S,Bielawski C W,et al.The chemistry of graphene oxide[J].Chemical Society Reviews,2010,39(1):228-240.
[15]Balapanuru J,Yang J X,Xiao S,et al.A graphene oxide-organic dye ionic complex with DNA-sensing and optical-limiting properties[J].Angewandte Chemie-International Edition,2010,49(37):6549-6553.
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[19]Monier M,Ayad D M,Wei Y,et al.Adsorption of Cu(Ⅱ),Co(Ⅱ),and Ni(Ⅱ)ions by modified magnetic chitosan chelating resin[J].Journal of Hazardous Materials,2010,177(1/3):962-970.
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