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    Photocatalytic degradation of 4-chlorophenol by titanium dioxide: role of annealing temperature and morphology

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    Date
    2020-01
    Author
    Tum, P.K
    Kariuki, D.K.
    Type
    Article
    Language
    en_US
    Metadata
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    Abstract
    This work investigates the degradation rate of 4-cholorophenol using Titanium dioxide photocatalysts. Chlorophenols and their compounds are a nuisance as they are recalcitrant to degradation in the environment. Three morphologically different Titanium dioxide catalysts, A, B and C, were immobilized on microscopic glass at a layer of 0.5 mg/cm2 and annealed between 500-700°C. The three different TiO2 powders were characterized using Scanning Electron Microscopy, X-Ray Diffraction and Brunauer Emmett Teller to determine their specific surface area, crystalline and particle sizes. A four–position photocatalytic reactor illuminated by two Ultra violet lamps of wavelength range 320-400 nm and intensity I = 27.87 mW/m2 was used to degrade the 4-Chlorophenol in 2 hrs. Aliquots of the degraded 4- chlorophenol were drawn every 30 minutes and analyzed using UV-Vis spectroscopy at λ=226 nm. The optimum annealing temperature of all TiO2 was found to be 650°C, with type B of hexagonal morphological structure and particle size of 28±2nm having the highest 4-chlorophenol degradation rate, of 71.21%.
    URI
    https://www.ajol.info/index.php/jasem/article/view/193336
    http://erepository.uonbi.ac.ke/handle/11295/108113
    Citation
    Tum, P. K., & Kariuki, D. K. (2020). Photocatalytic degradation of 4-chlorophenol by titanium dioxide: Role of annealing temperature and morphology. Journal of Applied Sciences and Environmental Management, 24(1), 5–12.
    Publisher
    Journal of Applied Sciences and Environmental Management
    Subject
    Photocatalytic, 4-chlorophenol, annealing, morphology
    Collections
    • College of Biological and Physical Sciences (CBPS) [29]

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