Anodic Cu2S and CuS nanorod and nanowall arrays: Preparation, properties and application in CO2 photoreduction

Download
  1. Get@NRC: Anodic Cu2S and CuS nanorod and nanowall arrays: Preparation, properties and application in CO2 photoreduction (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1039/c4nr05371k
AuthorSearch for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleNanoscale
ISSN2040-3364
Volume6
Issue23
Pages1430514318; # of pages: 14
SubjectNanowalls; Photo-reduction
AbstractCopper sulfide semiconductors made from earth-abundant elements have an optical absorption edge at ca. 1.2 eV, nearly ideal for solar energy harvesting. We report the growth and formation mechanism of vertically oriented arrays of copper sulfide nanostructures formed by electrochemical anodization. Key parameters that affect the morphology and phase of the nanostructures are type and strength of electrolyte, anodization voltage and duration. Cu2S and CuS nanostructures were obtained on both copper foil and copper-coated flexible Kapton substrates, and depending on the anodization parameters, consisted of vertically oriented arrays of nanowalls, nanoleafs or rods with branched nanodendrites. The anodization parameters also controlled the phase and stoichiometry of the nanostructures. p-type conduction for Cu2S nanostructures and n-type conduction for CuS nanostructures were revealed by admittance spectroscopy and Mott Schottky analysis. We also observed a weak, but nevertheless promising and previously unnoticed, photocatalytic action in copper sulfide nanorod and platelet arrays for the sunlight-driven conversion of CO2 into CH4. Under irradiation by AM 1.5G simulated sunlight at room temperature, a CH4 production rate as high as 38 μmol m-2 h-1 was obtained using the copper sulfide nanostructure arrays as stand-alone photocatalysts for CO2 photoreduction.
Publication date
PublisherRoyal Society of Chemistry
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology
Peer reviewedYes
NPARC number21272917
Export citationExport as RIS
Report a correctionReport a correction
Record identifierad1f4f67-8790-479c-a893-b304de76b524
Record created2014-12-03
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)