Catalytic photooxidation of pentachlorophenol using semiconductor nanoclusters [electronic resource]
Pentachlorophenol (PCP) is a toxic chlorinated aromatic molecule widely used as fungicide, a bactericide and a wood preservation, and thus ubiquitous in the environment. The authors report photo-oxidation of PCP using a variety of nanosize semiconductor metal oxides and sulfides in both aqueous and...
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Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2000.
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| Summary: | Pentachlorophenol (PCP) is a toxic chlorinated aromatic molecule widely used as fungicide, a bactericide and a wood preservation, and thus ubiquitous in the environment. The authors report photo-oxidation of PCP using a variety of nanosize semiconductor metal oxides and sulfides in both aqueous and polar organic solvents and compare the photo-oxidation kinetics of these nanoclusters to widely studied bulk powders like Degussa P-25 TiO₂ and CdS. They study both the light intensity dependence of PCP photooxidation for nanosize SnO₂ and the size dependence of PCP photooxidation for both nanosize SnO₂ and MoS₂. They find an extremely strong size dependence for the latter which they attribute to its size-dependent band gap and the associated change in redox potentials due to quantum confinement of the hole-electron pair. The authors show that nanosize MoS₂ with a diameter of d=3.0 nm and an absorbance edge of ∼450 nm is a very effective photooxidation catalyst for complete PCP mineralization, even when using only visible light irradiation. |
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| Item Description: | Published through SciTech Connect. 04/17/2000. "sand2000-0937j" " 0000035112-000" "0000035112-000" Journal Physical Chemical FT. WILCOXON,JESS P. |
| Physical Description: | 36 pages : digital, PDF file. |