Single atom Cu(I) promoted mesoporous titanias for photocatalytic Methyl Orange depollution and H 2 production

Trofimovaite, Rima, Parlett, Christopher M.a., Kumar, Santosh, Frattini, Lucia, Isaacs, Mark A., Wilson, Karen, Olivi, Luca, Coulson, Ben, Debgupta, Joyashish, Douthwaite, Richard E. and Lee, Adam F. (2018). Single atom Cu(I) promoted mesoporous titanias for photocatalytic Methyl Orange depollution and H 2 production. Applied Catalysis B: Environmental, 232 , pp. 501-511.

Abstract

Tailoring the physicochemical properties and hence reactivity of semiconductor photocatalysts in a predictable fashion, remains a challenge to their industrial application. Here we demonstrate the striking promotional effect of incorporating single Cu(I) atoms, on aqueous phase photocatalytic dye degradation and H2 production over surfactant-templated mesoporous TiO2. X-ray absorption spectroscopy reveals that ultra-low concentrations of copper (0.02-0.1 wt%) introduced into the mesoporous TiO2 surface create isolated Cu (I) species which suppress charge recombination, and confer a six-fold photocatalytic promotion of Methyl Orange degradation and four-fold enhancement of H2 evolution. The impact of mesopore structure and photophysical properties on photocatalytic activity is also quantified for the first time: calcination increases mesopore size and nanocrystalline order, and induces an anatase to rutile phase transition that is accompanied by a decrease in the optical band gap, increased charge carrier lifetime, and a concomitant significant activity enhancement.

Publication DOI: https://doi.org/10.1016/j.apcatb.2018.03.078
Divisions: Engineering & Applied Sciences > Chemical engineering & applied chemistry
Engineering & Applied Sciences
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: © 2018, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Funding: EPSRC (EP/K021796/1 and EP/K029525/2)
Uncontrolled Keywords: photocatalysis,titania,mesoporous,copper,XAS
Full Text Link: http://linkingh ... 926337318302868
Related URLs: http://linkingh ... 926337318302868 (Publisher URL)
Published Online Date: 2018-03-22
Published Date: 2018-09-15
Authors: Trofimovaite, Rima
Parlett, Christopher M.a. ( 0000-0002-3651-7314)
Kumar, Santosh ( 0000-0002-1352-9945)
Frattini, Lucia
Isaacs, Mark A.
Wilson, Karen ( 0000-0003-4873-708X)
Olivi, Luca
Coulson, Ben
Debgupta, Joyashish
Douthwaite, Richard E.
Lee, Adam F. ( 0000-0002-2153-1391)

Export / Share Citation


Statistics

Additional statistics for this record