Properties of Zirconia/Polyaniline hybrid nanocomposites and their application as photocatalysts for degradation of model pollutants

Properties of Zirconia/Polyaniline hybrid nanocomposites and their application as photocatalysts for degradation of model pollutants

A serie of novel ZrO2/Polyaniline (PANI) hybrid nanocomposite powders were successfully synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate (APS) in water, in the presence of ZrO2 nanoparticles. Syntheses were performed at initial ZrO2/aniline mole ratios 50, 100 and...

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Bibliographic Details
Published in:Materials chemistry and physics Vol. 205; pp. 130 - 137
Main Authors: Carević, M.V., Abazović, N.D., Mitrić, M.N., Ćirić-Marjanović, G., Mojović, M.D., Ahrenkiel, S.P., Čomor, M.I.
Format: Journal Article
Language:English
Published: Lausanne Elsevier B.V 01-02-2018
Elsevier BV
Subjects:
Aniline
Chemical synthesis
Crystal defects
Crystal structure
Current carriers
Electron microscopy
Electrons
Free electrons
Lattice vacancies
Nanocomposite
Nanocomposites
Nanoparticles
Optical properties
Paramagnetic resonance
Photocatalysis
Photodegradation
Polarons
Pollutants
Polyaniline (PANI)
Polyanilines
Polymerization
Rhodamine
Transmission electron microscopy
Trichlorophenol-TCP
Trichlorophenols
X ray powder diffraction
Zirconia
Zirconium dioxide
Zirconia
Polyaniline (PANI)
Nanocomposite
Trichlorophenol-TCP
Photocatalysis
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Summary:A serie of novel ZrO2/Polyaniline (PANI) hybrid nanocomposite powders were successfully synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate (APS) in water, in the presence of ZrO2 nanoparticles. Syntheses were performed at initial ZrO2/aniline mole ratios 50, 100 and 150 to produce ZP-50, ZP-100 and ZP-150. The morphological, structural, and optical properties of the synthesized nanocomposites were studied using Transmission electron microscopy (TEM), X-ray powder diffraction (XRD), Raman, UV-Vis and Electron-paramagnetic resonance (EPR) spectroscopies. EPR spectra of ZP-50 and ZP-100 nanocomposites showed the presence of intensive peak at the g-values comparable to that for free electrons (2.0023) indicating the presence of oligo/poly (semiquinone radical cations), i.e. polarons as charge carriers in PANI part; ZP-150 showed weak polaron peak of PANI, and peak that can be assigned to defects in zirconia matrix (Zr3+, oxygen vacancies). The monoclinic crystal structure of ZrO2 nanoparticles in all nanocomposites was confirmed by XRD and by Raman spectroscopy. The photocatalytic activities of ZP nanocomposites were evaluated using the photocatalytic degradation of trichlorophenol (TCP) and Rhodamine B model compounds and compared with the activity of bare ZrO2 nanoparticles. Enhanced degradation efficiencies of nanocomposites regarding TCP degradation were observed. [Display omitted] •ZP NPs were synthesized in-situ by chemical oxidative polymerization of aniline.•TEM measurements showed the presence of nanometer thick PANI layer on ZrO2 NPs.•EPR confirmed conductive PANI form in the nanocomposites and defects in ZrO2 NPs.•All nanocomposites have improved absorption of the Solar light and can be used for degradation of TCP.•Nanocomposite ZP50 with highest content of PANI has the best photocatalytic activity.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2017.11.016