A novel hydrogel,consisting of titanium dioxide nanotubes and graphene oxide(H-TN-GO),was fabricated to remove ciprofloxacin(CIP)from aqueous solution.The adsorbent was characterized by scanning electron microscope(SE...A novel hydrogel,consisting of titanium dioxide nanotubes and graphene oxide(H-TN-GO),was fabricated to remove ciprofloxacin(CIP)from aqueous solution.The adsorbent was characterized by scanning electron microscope(SEM),transmission electron microscope(TEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR)and Raman spectroscopy.Batch adsorption experiments systematically investigated the effect of contact time,temperature and pH on the capacity of H-TN-GO for CIP.Adsorption property of H-TN-GO and its regeneration performance was evaluated.H-TN-GO exhibited high adsorption capacity of 530 mg/g and Langmuir model was more suitable for fitting adsorption behavior.The removal ratio of CIP was more than 99%when initial concentrations were less than 100 mg/L.Besides,the initial pH of CIP solution had a distinct influence on the removal ratio,and adsorption capacity of adsorbance could be recovered by regeneration with mild alkaline condition.Large pore size and abundant oxygen-containing groups on the surface further improved its adsorption performance.The enhancing effect of H-TN-GO mainly attributed to the immobilization of TiO 2 onto graphene oxide andπ-πinteractions stacking between H-TN-GO and graphene oxide.As potential adsorbents,H-TN-GO exhibited remarkable regeneration capacity for water treatment.展开更多
基金Practical Innovation Training Program for College Students,China(No.201811276115H)
文摘A novel hydrogel,consisting of titanium dioxide nanotubes and graphene oxide(H-TN-GO),was fabricated to remove ciprofloxacin(CIP)from aqueous solution.The adsorbent was characterized by scanning electron microscope(SEM),transmission electron microscope(TEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR)and Raman spectroscopy.Batch adsorption experiments systematically investigated the effect of contact time,temperature and pH on the capacity of H-TN-GO for CIP.Adsorption property of H-TN-GO and its regeneration performance was evaluated.H-TN-GO exhibited high adsorption capacity of 530 mg/g and Langmuir model was more suitable for fitting adsorption behavior.The removal ratio of CIP was more than 99%when initial concentrations were less than 100 mg/L.Besides,the initial pH of CIP solution had a distinct influence on the removal ratio,and adsorption capacity of adsorbance could be recovered by regeneration with mild alkaline condition.Large pore size and abundant oxygen-containing groups on the surface further improved its adsorption performance.The enhancing effect of H-TN-GO mainly attributed to the immobilization of TiO 2 onto graphene oxide andπ-πinteractions stacking between H-TN-GO and graphene oxide.As potential adsorbents,H-TN-GO exhibited remarkable regeneration capacity for water treatment.
