Nanocrystalline immobilised ZnO photocatalyst for degradation of benzoic acid and methyl blue dye

Journal Article · Tue May 15 04:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.01.042· OSTI ID:22803976

Suryavanshi, R. D.; Mohite, S. V.; Bagade, A. A.; Shaikh, S. K.; Thorat, J. B.

Highlights: • ZnO thin films were successfully prepared with the help of chemical spray pyrolysis technique. • Study the effect of thickness variation(solution quantity) onto the various properties of film. • Film prepared at 1.65 μm thickness showsthe maximum photoelectrochemical performance in 0.1 M NaOH electrolyte. • The flat band potential of optimized ZnO thin film is –0.86 V/SCE. • Study degradation result of benzoic acidand methyl blue dye using ZnO photoelectrode under UV light illumination. - Abstract: ZnO thin films were deposited with different solution quantities using spray pyrolysis technique. The effect of thickness variations on photoelectrochemical (PEC), structural, morphological and optical properties are studied. PEC measurements showed maximum photo response about I{sub sc} = 0.485 mA and V{sub oc} = 632 mV at 1.65 μm film thickness. X-ray diffraction study confirms that the films are polycrystalline with hexagonal crystal structure. Hexagonal shaped grains are observed conformed from surface morphology. The estimated bandgap energy of ZnO films are varies between 3.23 to 3.29 eV. Finally large area (10 × 10 cm{sup 2}) deposited ZnO photoelectrode were used to study the photocatalytic and photoelectrocatalytic degradation of benzoic acid (BA) and methyl blue (MB) dye under UV radiation. Photoelectrocatalytic degradation result shows 65.7% degradation of BA and for colorant organic compound such as MB dye is about 98.1% is possible. The mineralization of pollutants are studied by measuring chemical oxygen demand (COD) values.

• OSTI ID: 22803976
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 101; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
BENZOIC ACID
CHEMICAL OXYGEN DEMAND
CRYSTAL STRUCTURE
DEPOSITION
ELECTROLYTES
METHYLENE BLUE
MORPHOLOGY
NANOSTRUCTURES
OPTICAL PROPERTIES
PHOTOCATALYSIS
POLYCRYSTALS
PYROLYSIS
SODIUM HYDROXIDES
THICKNESS
THIN FILMS
ULTRAVIOLET RADIATION
X-RAY DIFFRACTION
ZINC OXIDES