ZYOUD, Ahed H.; ZAATAR, Nidal; SAADEDDIN, Iyad; ALI, Cheknane; PARK, Dae-Hoon; CAMPET, Guy; HILAL, Hikmat S.

doi:10.1016/j.jhazmat.2009.08.093

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ZYOUD, Ahed H.
Department of Chemistry

ZAATAR, Nidal
Department of Chemistry

SAADEDDIN, Iyad
Department of Chemistry

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Journal of Hazardous Materials. 2010, vol. 173, n° 1-3, p. 318-325

Elsevier

Résumé en anglais

Mineralization of phenazopyridine, 1, in water, under solar-simulator radiation was efficiently achieved using nanoparticle CdS-sensitized rutile TiO2, TiO2/CdS, 2, as photo-catalysts. Despite that, 2 showed two main drawbacks. Firstly, the system was difficult to recover by simple filtration, and demanded centrifugation. Secondly, the sensitizer CdS showed relatively high tendency to leach out hazardous Cd2+ ions under photo-degradation reaction conditions. In an attempt to solve out such difficulties, 2 was supported onto sand surface. The sand/TiO2/CdS system, 3, was easier to recover but showed slightly lower catalytic activity compared to 2. On the other hand, the support failed to prevent leaching of Cd2+. This indicates limited future applicability of CdS-sensitized TiO2 photo-catalyst systems, in solar-based water purification strategies, unless leaching out tendency is completely prevented.< Réduire

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Sand

TiO2

CdS

Sensitization

Phenazopyridine

Photo-degradation

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CdS-sensitized TiO<sub>2</sub> in phenazopyridine photo-degradation: Catalyst efficiency, stability and feasibility assessment

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