β-环糊精修饰磁性氧化石墨烯对酸性红R的吸附
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摘要
利用Hummers法制备氧化石墨烯(GO),并结合原位沉淀法合成了一种复合吸附材料β-环糊精修饰磁性氧化石墨烯(Fe_3O_4@GO/β-CD),用SEM、TEM、FTIR、激光粒度分析仪、比表面积测定仪(BET)和磁强计对Fe_3O_4@GO/β-CD进行了表征和测定,结果表明:合成的Fe_3O_4@GO/β-CD平均粒径为460nm,比表面积为252.3m~2/g,饱和磁化强度为73.5emu/g。Fe_3O_4@GO/β-CD对酸性红R的吸附是一个准二级动力学过程,其准二级反应速率常数为5.18*10–3 g/(mg·min),吸附等温线较好地符合Langmuir模型,在pH=3.0时对酸性红R的最大吸附量为228.31 mg/g。
The graphene oxide(GO) was prepared by Hummers oxidation method. Subsequently, the β-cyclodextrin modified magnetic graphene oxide(Fe_3O_4@GO/β-CD) composite was fabricated by the in-situ co-precipitation method and characterized by SEM, TEM, FTIR, laser granularity analyzer,Brunauer-Emmett-Teller(BET) surface area measurement and vibrating sample magnetometer. The results showed that the prepared Fe_3O_4@GO/β-CD had a particle size of about 460 nm, a specific surface area of252.3 m~2/g and a saturation magnetization of 73.5 emu/g. The adsorption of Acid Red R on the Fe_3O_4@GO/β-CD was a pseudo second-rate kinetic process, and the adsorption kinetics constant of Acid Red R was found to be 5.18*10–3 g/(mg·min). The adsorption behavior of Acid Red R on the Fe_3O_4@GO/β-CD followed Langmuir mode with a maximum adsorption capacity of 228.31 mg/g at pH=3.0.
The graphene oxide(GO) was prepared by Hummers oxidation method. Subsequently, the β-cyclodextrin modified magnetic graphene oxide(Fe_3O_4@GO/β-CD) composite was fabricated by the in-situ co-precipitation method and characterized by SEM, TEM, FTIR, laser granularity analyzer,Brunauer-Emmett-Teller(BET) surface area measurement and vibrating sample magnetometer. The results showed that the prepared Fe_3O_4@GO/β-CD had a particle size of about 460 nm, a specific surface area of252.3 m~2/g and a saturation magnetization of 73.5 emu/g. The adsorption of Acid Red R on the Fe_3O_4@GO/β-CD was a pseudo second-rate kinetic process, and the adsorption kinetics constant of Acid Red R was found to be 5.18*10–3 g/(mg·min). The adsorption behavior of Acid Red R on the Fe_3O_4@GO/β-CD followed Langmuir mode with a maximum adsorption capacity of 228.31 mg/g at pH=3.0.
引文
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[3]Wu J L,Tian K,Wang J L,et al.Adsorption of uranium(Ⅵ)by amidoxime modified multi-walled carbon nanotubes[J].Progress in Nuclear Energy,2018,106:79-86.
[4]Buffa A,Mandler D.Adsorption and detection of organic pollutants by fixed bed carbon nano-tube electrochemical membrane[J].Chemical Engineering Journal,2019,359:130-137.
[5]Zhang W,Lu Y,Sun H W,et al.Effects of multiwalled carbon nanotubes on pyrene adsorption and desorption in soils:The role of soil constituents[J].Chemosphere,2019,221:203-211.
[6]Kuila T,Bose S,Mishra A K,et al.Chemical functionalization of graphene and its applications[J].Progress in Materials Science,2012,57(7):1061-1105.
[7]Liu X,Yu J G,Wageh S,et al.Graphene in photocatalysis:Areview[J].Small,2016,12:6640-6696.
[8]Sikder M T,Rahman M M,Jakariya M,et al.Remediation of water pollution with native cyclodextrins and modified cyclodextrins:Acomparative overview and perspectives[J].Chemical Engineering Journal,2019,355(48):920-941.
[9]Xie J H,Xu Y,Shishir M R,et al.Green extraction of mulberry anthocyanin with improved stability using beta-cyclodextrin[J].Journal of the Science of Food and Agriculture,2019,99(5):2494-2503.
[10]Duan Z B,Bu T T,Bian H,et al.Effective removal of phenylamine,quinoline,and indole from light oil by beta-cyclodextrin aqueous solution through molecular inclusion[J].Energy&Fuels,2018,32(9):9280-9288.
[11]Wang G H,Yang L L,Wu F,et al.Carboxymethyl-β-cyclodextrin enhanced TiO2 removal of Acid Red R and lead ions in suspended solutions[J].Journal of Chemical Technology and Biotechnology,2014,89(2):297-304.
[12]Safajou H,Khojasteh H,Salavati-Niasari M,et al.Enhanced photocatalytic degradation of dyes over graphene/Pd/TiO2nanocomposites:TiO2 nanowires versus TiO2 nanoparticles[J].Journal of Colloid and Interface Science,2017,498:423-432.
[13]Wang X J,Li X J,Luo C N,et al.Ultrasensitive molecularly imprinted electrochemical sensor based on magnetism graphene oxide/b-cyclodextrin/aunanoparticles composites for chrysoidine analysis[J].Electrochimica Acta,2014,130:519-525.
[14]Liang R P,Liu C M,Meng X Y,et al.A novel open-tubular capillary electrochromatography usingb-cyclodextrin functionalized graphene oxide-magnetic nanocomposites as tunable stationary phase[J].Journal of Chromatography A,2012,1266:95-102.
[15]Gong J L,Wang X Y,Zeng G M,et al.Copper(Ⅱ)removal by pectin-iron oxide magnetic nanocomposite adsorbent[J].Chemical Engineering Journal,2012,185/186:100-107.
[16]Zheng Shaojie(郑少杰),Zhang Xiuju(张秀菊),Lin Zhidan(林志丹).Preparation ofβ-cyclodextrin microsphere derivative and its application in printing and dyeing wastewater treatment[J].Industrial Water Treatment(工业水处理),2010,30(10):33-35.