Visible Light Photoreduction of CO{sub 2} Using CdSe/Pt/TiO{sub 2} Heterostructured Catalysts
- Parsons Project Services, South Park, PA (United States)
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, (United States)
A series of CdSe quantum dot (QD)-sensitized TiO{sub 2} heterostructures have been synthesized, characterized, and tested for the photocatalytic reduction of CO{sub 2} in the presence of H{sub 2}O. Our results show that these heterostructured materials are capable of catalyzing the photoreduction of CO{sub 2} using visible light illumination (λ > 420 nm) only. The effect of removing surfactant caps from the CdSe QDs by annealing and using a hydrazine chemical treatment have also been investigated. The photocatalytic reduction process is followed using infrared spectroscopy to probe the gas-phase reactants and gas chromatography to detect the products. Gas chromatographic analysis shows that the primary reaction product is CH{sub 4}, with CH{sub 3}OH, H{sub 2}, and CO observed as secondary products. Typical yields of the gas-phase products after visible light illumination (λ>420 nm) were 48 ppm g{sup -1} h{sup -1} of CH{sub 4}, 3.3 ppm g{sup -1} h{sup -1} of CH{sub 3}OH (vapor), and trace amounts of CO and H{sub 2}.
- Research Organization:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy (FE)
- Contributing Organization:
- Parsons Project Services, South Park, PA (United States)
- DOE Contract Number:
- DE-AC-26-04NT41817
- OSTI ID:
- 1012784
- Report Number(s):
- netltpr-3115
- Journal Information:
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS , Vol. 1, Issue 1; ISSN 1948--7185
- Country of Publication:
- United States
- Language:
- English
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