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Title: 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.

Authors:
 [1]; ORCiD logo [1]
  1. Department of Chemistry, University of Michigan, Ann Arbor, USA
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); 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. doi:10.1039/C9RA04839A.
McDonald, Kori D., and Bartlett, Bart M. Wed . "Photocatalytic primary alcohol oxidation on WO 3 nanoplatelets". United Kingdom. doi: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}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1039/C9RA04839A

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