Coarsened TiO2 nanoparticles generated from basic titanate precursors

Jeffrey Brownson, Eva Tsang, Marc A. Anderson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

TiO2 is a favored electron acceptor for composite photovoltaic solar cells. The n-type semiconductor has a wide band gap and favorable alignment of the conduction band relative to the excited states of interfacial visible light "sensitizers". Mesoporous anatase yields architectures that greatly enhance interfacial areas between the oxide and sensitizers (dyes, inorganic semiconductors, or polymers). However, a compromise must be established between increased surface area for very small nanoparticles and reduced interfacial charge carrier recombination for larger nanoparticles. A low-temperature route for nanoparticulate alkylammonium titanate suspensions has been developed for the precursor materials. These precursors were then subjected to hydrothermal coarsening, converting the titanates to anatase (TiO2) with larger dipyramidal nanoparticle morphologies. The materials were compared with sol-gel derived anatase nanoparticles. Powders of the materials were characterized by XRD, FTIR, SEM, and nitrogen absorption. Porous films were deposited on transparent conductive oxides to determine photocurrent onset potentials relative to SCE.

Original languageEnglish (US)
Title of host publication233rd ACS National Meeting, Abstracts of Scientific Papers
StatePublished - Dec 28 2007
Event233rd ACS National Meeting - Chicago, IL, United States
Duration: Mar 25 2007Mar 29 2007

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other233rd ACS National Meeting
CountryUnited States
CityChicago, IL
Period3/25/073/29/07

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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  • Cite this

    Brownson, J., Tsang, E., & Anderson, M. A. (2007). Coarsened TiO2 nanoparticles generated from basic titanate precursors. In 233rd ACS National Meeting, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).