Photocatalytic primary alcohol oxidation on WO 3 nanoplatelets
Abstract
With the aid of direct heating through microwave irradiation in non-aqueous media, nanocrystalline tungsten(VI) oxide is achievable in 30 minutes at 200 °C, faster and at a lower temperature than conventional synthesis methods. Forming in a platelet morphology, these particles are as small as 20 nm with a BET surface area of 37 m2 g-1 WO3. These nanoplatelets are active for the photocatalytic oxidation of the 1° alcohols benzyl alcohol (rate constant, k of 2.6 × 10-3 h-1) and 5-(hydroxymethyl)-2-furfural (k of 0.01 h-1) using 10 mg of WO3 with 2 mL of 0.250 M substrate in acetonitrile and a 150 mW cm-2 460 nm blue LED source. As expected, these rate constants are larger than those observed for commercially prepared, micron-sized WO3. XPS analysis shows that during catalysis, the concentration of W5+ on the surface increases, but the nanoplatelets are stable under these reaction conditions. The overall morphology and size of the particles are retained through the reactions. Moreover, the nanoplatelets are recyclable—showing no loss in activity for four reaction cycles.
- Publication Date:
- Research Org.:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1561369
- Alternate Identifier(s):
- OSTI ID: 1610869
- Grant/Contract Number:
- SC0006587; DMR-0420785
- Resource Type:
- Published Article
- Journal Name:
- RSC Advances
- Additional Journal Information:
- Journal Name: RSC Advances Journal Volume: 9 Journal Issue: 49; Journal ID: ISSN 2046-2069
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Chemistry
Citation Formats
McDonald, Kori D., and Bartlett, Bart M. Photocatalytic primary alcohol oxidation on WO 3 nanoplatelets. United Kingdom: N. p., 2019.
Web. doi:10.1039/C9RA04839A.
McDonald, Kori D., & Bartlett, Bart M. Photocatalytic primary alcohol oxidation on WO 3 nanoplatelets. United Kingdom. https://doi.org/10.1039/C9RA04839A
McDonald, Kori D., and Bartlett, Bart M. Wed .
"Photocatalytic primary alcohol oxidation on WO 3 nanoplatelets". United Kingdom. https://doi.org/10.1039/C9RA04839A.
@article{osti_1561369,
title = {Photocatalytic primary alcohol oxidation on WO 3 nanoplatelets},
author = {McDonald, Kori D. and Bartlett, Bart M.},
abstractNote = {With the aid of direct heating through microwave irradiation in non-aqueous media, nanocrystalline tungsten(VI) oxide is achievable in 30 minutes at 200 °C, faster and at a lower temperature than conventional synthesis methods. Forming in a platelet morphology, these particles are as small as 20 nm with a BET surface area of 37 m2 g-1 WO3. These nanoplatelets are active for the photocatalytic oxidation of the 1° alcohols benzyl alcohol (rate constant, k of 2.6 × 10-3 h-1) and 5-(hydroxymethyl)-2-furfural (k of 0.01 h-1) using 10 mg of WO3 with 2 mL of 0.250 M substrate in acetonitrile and a 150 mW cm-2 460 nm blue LED source. As expected, these rate constants are larger than those observed for commercially prepared, micron-sized WO3. XPS analysis shows that during catalysis, the concentration of W5+ on the surface increases, but the nanoplatelets are stable under these reaction conditions. The overall morphology and size of the particles are retained through the reactions. Moreover, the nanoplatelets are recyclable—showing no loss in activity for four reaction cycles.},
doi = {10.1039/C9RA04839A},
journal = {RSC Advances},
number = 49,
volume = 9,
place = {United Kingdom},
year = {2019},
month = {9}
}
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https://doi.org/10.1039/C9RA04839A
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