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Title: Visible light photoreduction of CO.sub.2 using heterostructured catalysts

The method provides for use of sensitized photocatalyst for the photocatalytic reduction of CO.sub.2 under visible light illumination. The photosensitized catalyst is comprised of a wide band gap semiconductor material, a transition metal co-catalyst, and a semiconductor sensitizer. The semiconductor sensitizer is photoexcited by visible light and forms a Type II band alignment with the wide band gap semiconductor material. The wide band gap semiconductor material and the semiconductor sensitizer may be a plurality of particles, and the particle diameters may be selected to accomplish desired band widths and optimize charge injection under visible light illumination by utilizing quantum size effects. In a particular embodiment, CO.sub.2 is reduced under visible light illumination using a CdSe/Pt/TiO2 sensitized photocatalyst with H.sub.2O as a hydrogen source.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1174212
Assignee:
U.S. Department of Energy (Washington, DC) NETL
Patent Number(s):
8,986,511
Application Number:
12/903,282
Resource Relation:
Patent File Date: 2010 Oct 13
Research Org:
U.S. Department of Energy, Washington, DC (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Other works cited in this record:

Photocatalytic reduction of carbon dioxide to hydrocarbon using copper-loaded titanium dioxide
journal, August 1994

Photocatalytic hydrogen production from natural seawater
journal, June 2007
  • Ji, Sang Min; Jun, Hwichan; Jang, Jum Suk
  • Journal of Photochemistry and Photobiology A: Chemistry, Vol. 189, Issue 1, p. 141-144
  • DOI: 10.1016/j.jphotochem.2007.01.011

Photocatalytic conversion of CH4 and CO2 to oxygenated compounds over Cu/CdS–TiO2/SiO2 catalyst
journal, December 2004

Sensitization of nanocrystalline TiO2 electrode with quantum sized CdSe and ZnTCPc molecules
journal, May 1997

Trends in non-metal doping of anatase TiO2: B, C, N and F
journal, May 2013

Photocatalytic reduction of CO2 with H2O on mesoporous silica supported Cu/TiO2 catalysts
journal, October 2010
  • Li, Ying; Wang, Wei-Ning; Zhan, Zili
  • Applied Catalysis B: Environmental, Vol. 100, Issue 1-2, p. 386-392
  • DOI: 10.1016/j.apcatb.2010.08.015

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