title: Templated electrodeposition and photocatalytic activity of cuprous oxide nanorod arrays.
abstract: Cuprous oxide (Cu2O) nanorod arrays have been prepared via a novel templated electrodeposition process and were characterized for their photocatalytic behavior in nonaqueous photoelectrochemical cells. Zinc oxide (ZnO) nanorod films serve as sacrificial templates for the in situ formation of polymer nanopore membranes on transparent conductive oxide substrates. Nitrocellulose and poly(lactic acid) are effective membrane-forming polymers that exhibit different modes of template formation, with nitrocellulose forming conformal coatings on the ZnO surface while poly(lactic acid) acts as an amorphous pore-filling material. Robust template formation is sensitive to the seeding method used to prepare the precursor ZnO nanorod films. Photoelectrochemical cells prepared from electrodeposited Cu2O films using methyl viologen as a redox shuttle in acetonitrile electrolyte exhibit significant charge recombination that can be partially suppressed by a combination of surface passivation methods. Surface-passivated nanostructured Cu2O films show enhanced photocurrent relative to planar electrodeposited Cu2O films of similar thickness. We have obtained the highest photocurrent ever reported for electrodeposited Cu2O in a nonaqueous photoelectrochemical cell.
authors.affiliation: Department of Chemistry, University of North Texas , Denton, Texas 76203, United States.
authors.forename: Keith M
authors.initials: KM
authors.lastname: Haynes
authors.forename: Collin M
authors.initials: CM
authors.lastname: Perry
authors.forename: Marlene
authors.initials: M
authors.lastname: Rivas
authors.forename: Teresa D
authors.initials: TD
authors.lastname: Golden
authors.forename: Antony
authors.initials: A
authors.lastname: Bazan
authors.forename: Maria
authors.initials: M
authors.lastname: Quintana
authors.forename: Vladimir N
authors.initials: VN
authors.lastname: Nesterov
authors.forename: Seare A
authors.initials: SA
authors.lastname: Berhe
authors.forename: Juan
authors.initials: J
authors.lastname: Rodríguez
authors.forename: Walter
authors.initials: W
authors.lastname: Estrada
authors.forename: W Justin
authors.initials: WJ
authors.lastname: Youngblood
keywords: cuprous oxide; electrodeposition; membrane; nanorods; template