title: Stable organic-inorganic hybrid of polyaniline/α-zirconium phosphate for efficient removal of organic pollutants in water environment.
abstract: In this article, organic-inorganic hybrid materials of polyaniline/α-zirconium phosphate (PANI/α-ZrP) was synthesized by in situ oxidative polymerization reaction and characterized by Fourier transformed infrared (FTIR), field-emission scanning electron microscopic (FE-SEM) and X-ray diffraction (XRD). The results showed that polyaniline (PANI) was successfully grown on the surface of α-zirconium phosphate (α-ZrP) nanoplates. The PANI/α-ZrP nanocomposites were further applied to remove methyl orange (MO), which was used as a model of organic pollutants in aqueous solution. A synergistic effect of PANI and α-ZrP on promoting the adsorption removal of MO was observed. The PANI/α-ZrP nanocomposites exhibited excellent maximum adsorption capacity toward MO (377.46 mg g(-1)), which is superior to that of PANI nanotubes (254.15 mg g(-1)) and much higher than that of many other adsorbents. The adsorption isotherms of MO can be well-fitted with the Langmuir model and the adsorption kinetics follows the pseudo-second-order model. MO adsorption decreased with increasing solution pH at pH > 4.0 implying that MO adsorption on PANI/α-ZrP may via electrostatic interactions between amine and imine groups on the surface of PANI/α-ZrP and MO molecules. This study implies that the hybrid materials of PANI/α-ZrP can be suggested as potential adsorbents to remove organic dyes from large volumes of aqueous solutions.
authors.affiliation: Department of Chemistry, Division of Nanomaterials and Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Xi-Lin
authors.initials: XL
authors.lastname: Wu
authors.forename: Wei-Hong
authors.initials: WH
authors.lastname: Xu
authors.forename: Xing-Jiu
authors.initials: XJ
authors.lastname: Huang
authors.forename: Jin-Huai
authors.initials: JH
authors.lastname: Liu
authors.forename: An-Wu
authors.initials: AW
authors.lastname: Xu
mesh_terms: D000327:Adsorption; D000814:Aniline Compounds / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry; D007700:Kinetics; D053761:Nanocomposites / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D001391:Azo Compounds; D014874:Water Pollutants, Chemical; C416807:polyaniline; C027006:zirconium phosphate; C100258:methyl orange; D015040:Zirconium