title: Adsorption of azo dyes from aqueous solution by the hybrid MOFs/GO.
abstract: In this work, a hybrid of chromium(III) terephthalate metal organic framework (MIL-101) and graphene oxide (GO) was synthesized and its performance in the removal of azo dyes (Amaranth, Sunset Yellow, and Carmine) from water was evaluated. The adsorption for azo dyes on MIL-101/GO was compared with that of MIL-101, and it was found that the addition of GO enhanced the stability of MIL-101 in water and increased the adsorption capacity. The maximum adsorption capacities of MIL-101/GO were 111.01 mg g(-1) for Amaranth, 81.28 mg g(-1) for Sunset Yellow, and 77.61 mg g(-1) for Carmine. The adsorption isotherms and kinetics were investigated, showing that the adsorption fits the Freundlich isotherm and the pseudo-second-order kinetic model. The recyclability of MIL-101/GO was shown by the regeneration by acetone. The high adsorption capability and excellent reusability make MIL-101/GO a competent adsorbent for the removal dyes from aqueous solution.
authors.affiliation: Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan, Hubei 430062, China E-mail: waitingll@yahoo.com.
authors.forename: Ling
authors.initials: L
authors.lastname: Li
authors.affiliation: Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan, Hubei 430062, China E-mail: waitingll@yahoo.com; School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.
authors.forename: Zhennan
authors.initials: Z
authors.lastname: Shi
authors.affiliation: Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan, Hubei 430062, China E-mail: waitingll@yahoo.com.
authors.forename: Hongyang
authors.initials: H
authors.lastname: Zhu
authors.affiliation: Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan, Hubei 430062, China E-mail: waitingll@yahoo.com.
authors.forename: Wei
authors.initials: W
authors.lastname: Hong
authors.affiliation: School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.
authors.forename: Fengwei
authors.initials: F
authors.lastname: Xie
authors.affiliation: Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan, Hubei 430062, China E-mail: waitingll@yahoo.com.
authors.forename: Keke
authors.initials: K
authors.lastname: Sun
mesh_terms: D000327:Adsorption; D000548:Amaranth Dye / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry*; D002329:Carmine / Q000737:chemistry*; D017608:Chromium Compounds / Q000737:chemistry*; D004396:Coloring Agents; D006108:Graphite / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008670:Metals; D010087:Oxides; D014867:Water; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D001391:Azo Compounds; D017608:Chromium Compounds; D004396:Coloring Agents; D008670:Metals; D010087:Oxides; D014874:Water Pollutants, Chemical; D014867:Water; D006108:Graphite; D000548:Amaranth Dye; D002329:Carmine; C005842:6-hydroxy-5-((p- sulfophenyl)azo)-2-naphthalenesulfonic acid disodium salt