title: Adsorption of Cu(II) from aqueous solution by anatase mesoporous TiO2 nanofibers prepared via electrospinning.
abstract: Anatase mesoporous titanium nanofibers (m-TiO(2) NFs) have been synthesized from calcination of the as-spun TiO(2)/polyvinyl pyrrolidone (PVP)/pluronic123 (P123) composite nanofibers at 450 °C in air for 3h. The structures and the physicochemical properties of m-TiO(2) NFs are characterized by scanning electron microscopy, X-ray diffraction, nitrogen adsorption-desorption isotherm analysis, and determination point of zero charge, respectively. An investigation of Cu(II) adsorption onto m-TiO(2) NFs has been studied in this research. The pH effect, adsorption kinetics, and adsorption isotherms are examined in batch experiments. Experimental data were analyzed using pseudo-first order and pseudo-second order kinetic models. It was found that adsorption kinetics were the best fitting by a pseudo-second order kinetic model. The optimum pH for Cu(II) adsorption was found to be 6.0. The equilibrium data were analyzed by the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm models, which revealed that the Freundlich isotherm is the best-fit isotherm for the adsorption of Cu(II). Compared to the TiO(2) NFs (regular anatase titanium nanofibers) in the same experimental conditions to elucidate the role of the mesoporous structure of m-TiO(2) NFs, experimental results showed that the m-TiO(2) NFs had a better adsorption capacity for Cu(II) due to its higher surface area.
authors.affiliation: Alan G. MacDiarmid Institute, Jilin University, Changchun 130012, PR China.
authors.forename: Dinhthao
authors.initials: D
authors.lastname: Vu
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Li
authors.forename: Hongnan
authors.initials: H
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Zhaojie
authors.initials: Z
authors.lastname: Wang
authors.forename: Xiuru
authors.initials: X
authors.lastname: Xu
authors.forename: Bo
authors.initials: B
authors.lastname: Dong
authors.forename: Ce
authors.initials: C
authors.lastname: Wang