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Sustained, photocatalytic CO2 reduction to CH4 in a continuous flow reactor by earth-abundant materials: Reduced titania-Cu2O Z-scheme heterostructures

Title
Sustained, photocatalytic CO2 reduction to CH4 in a continuous flow reactor by earth-abundant materials: Reduced titania-Cu2O Z-scheme heterostructures
Authors
Ali, ShahzadLee, JunhoKim, HwapyongHwang, YunjuRazzaq, AbdulJung, Jin-WooCho, Chang-HeeIn, Su-Il
DGIST Authors
Ali, Shahzad; Lee, Junho; Kim, Hwapyong; Hwang, Yunju; Razzaq, Abdul; Jung, Jin-Woo; Cho, Chang-HeeIn, Su-Il
Issue Date
2020-12
Citation
Applied Catalysis B: Environmental, 279, 119344
Type
Article
Article Type
Article
Author Keywords
Reduced titaniaOxygen vacancyPhotocatalysisZ-scheme heterostructureCopper oxide
Keywords
CU2OPHOTODEPOSITIONTIO2 NANOPARTICLESDEFECTIVE TIO2PHOTOREDUCTIONOXIDEEFFICIENTMECHANISMHYDROGENCOPPER
ISSN
0926-3373
Abstract
Photocatalytic conversion of CO2 and water vapor to hydrocarbon fuels is a promising approach for storing solar energy while reducing greenhouse gas emissions. However, still certain issues including low product yields, limited photocatalyst stability and relatively high cost have hampered practical implementation of this technology. In the present work, a unique strategy is adopted to synthesize a stable, and inexpensive photocatalyst comprised of earth-abundant materials: a reduced titania-Cu2O Z-scheme heterostructure. Under illumination for 6 h, the optimized reduced titania-Cu2O photocatalyst enables 0.13 % photoreduction of highly diluted CO2 with water vapors to 462nmol g−1 of CH4 while showing excellent stability over seven testing cycles (42 h). Our studies show the Z-scheme inhibits Cu2O photocorrosion, while its synergistic effects with reduced titania result in sustained CH4 formation in a continuous flow photoreactor. To the best of our knowledge stability exhibited by the reduced titania-Cu2O Z-scheme is the highest for any Cu-based photocatalyst. © 2020 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/12623
DOI
10.1016/j.apcatb.2020.119344
Publisher
Elsevier BV
Related Researcher
  • Author Cho, Chang-Hee Future Semiconductor Nanophotonics Laboratory
  • Research Interests Semiconductor; Nanophotonics; Light-Matter Interaction
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceFuture Semiconductor Nanophotonics Laboratory1. Journal Articles
Department of Energy Science and EngineeringGreen and Renewable Energy for Endless Nature(GREEN) Lab1. Journal Articles


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