Enhancement of oxygen vacancies and solar photocatalytic activity of zinc oxide by incorporation of nonmetal

Journal Article · Thu Dec 15 04:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.10.016· OSTI ID:21612828

Patil, Ashokrao B ^[1]; Patil, Kashinath R ^[2]

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1. Department of Chemistry, University of Pune, Ganeshkhind, Pune 411007 (India)
2. Center for Materials Characterization, National Chemical Laboratory, Pune 411008 (India)

B-doped ZnO and N-doped ZnO powders have been synthesized by mechanochemical method and characterized by TG-DTA, XRD, SEM-EDX, XPS, UV-visible and photoluminescence (PL) spectra. X-ray diffraction data suggests the hexagonal wurtzite structure for modified ZnO crystallites and the incorporation of nonmetal expands the lattice constants of ZnO. The room temperature PL spectra suggest more number of oxygen vacancies exist in nonmetal-doped ZnO than that of undoped zinc oxide. XPS analysis shows the substitution of some of the O atoms of ZnO by nonmetal atoms. Solar photocatalytic activity of B-doped ZnO, N-doped ZnO and undoped ZnO was compared by means of oxidative photocatalytic degradation (PCD) of Bisphenol A (BPA). B-doped ZnO showed better solar PCD efficiency as compare to N-doped ZnO and undoped ZnO. The PCD of BPA follows first order reaction kinetics. The detail mechanism of PCD of Bisphenol A was proposed with the identification of intermediates such as hydroquinone, benzene-1,2,4-triol and 4-(2-hydroxypropan-2-yl) phenol. - Graphical Abstract: B-doped ZnO and N-doped ZnO synthesized by mechanochemical method were characterized by various techniques. Solar photocatalytic degradation of Bisphenol-A is in the order of B-ZnO>N-ZnO>ZnO. Highlights: Black-Right-Pointing-Pointer B-doped ZnO and N-doped ZnO powders have been synthesized by mechanochemical method. Black-Right-Pointing-Pointer PL spectra suggest oxygen vacancies are in order of B-doped ZnO>N-doped ZnO>ZnO. Black-Right-Pointing-Pointer Solar PCD efficiency is in order of B-doped ZnO>N-doped ZnO>ZnO for Bisphenol A.

• OSTI ID: 21612828
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 12 Vol. 184; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AROMATICS
BENZENE
BONNEVILLE POWER ADMINISTRATION
CATALYSIS
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFERENTIAL THERMAL ANALYSIS
DIFFRACTION
DOPED MATERIALS
EFFICIENCY
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
ELEMENTS
EMISSION
HYDROCARBONS
KINETICS
LATTICE PARAMETERS
LUMINESCENCE
MATERIALS
MICROSCOPY
NATIONAL ORGANIZATIONS
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCATALYSIS
PHOTOELECTRON SPECTROSCOPY
PHOTOLUMINESCENCE
PHOTON EMISSION
REACTION KINETICS
SCANNING ELECTRON MICROSCOPY
SCATTERING
SPECTRA
SPECTROSCOPY
THERMAL ANALYSIS
US DOE
US ORGANIZATIONS
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
ZINC COMPOUNDS
ZINC OXIDES