Photooxidation of organic chemicals catalyzed by nanoscale MoS{sub 2}
- Sandia National Labs., Albuquerque, NM (United States)
The authors describe experiments that explore the use of nanosize MoS{sub 2} semiconductors for catalyzing the photooxidation of an organic chemical, phenol. The band gap of nanoscale MoS{sub 2} can be tuned across the visible spectrum and they show that d = 4.5 nm MoS{sub 2} which has an absorbance edge near 550 nm photooxidizes phenol using only visible light (>450 nm) while smaller band gap d = 8--10 nm MoS{sub 2} or wide band gap Degussa P-25 TiO{sub 2} do not. The possibility of increasing the rate of photooxidation of phenol by deposition of nanoclusters of MoS{sub 2} on bulk semiconductor powders is investigated. It is shown that small amounts (<5 wt%) of nanoscale MoS{sub 2} deposited onto TiO{sub 2} can lead to significant ({approximately}2-fold) enhancements of phenol destruction rates compared to TiO{sub 2} by itself.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 315948
- Journal Information:
- Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Vol. 103, Issue 1; Other Information: PBD: 7 Jan 1999
- Country of Publication:
- United States
- Language:
- English
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