Show simple item record

dc.contributor.authorSallard, Sébastien
dc.contributor.authorSchröder, Michael
dc.contributor.authorBoissière, Cédric
dc.contributor.authorDunkel, Christian
dc.contributor.authorEtienne, Mathieu
dc.contributor.authorWalcarius, Alain
dc.contributor.authorOekermann, Torsten
dc.contributor.authorWark, Michael
dc.contributor.authorSmarsly, Bernd M.
dc.date.accessioned2023-06-02T13:37:37Z
dc.date.available2020-05-20T09:23:06Z
dc.date.available2023-06-02T13:37:37Z
dc.date.issued2013
dc.identifier.urihttp://nbn-resolving.de/urn:nbn:de:hebis:26-opus-151371
dc.identifier.urihttps://jlupub.ub.uni-giessen.de//handle/jlupub/16369
dc.identifier.urihttp://dx.doi.org/10.22029/jlupub-15749
dc.description.abstractIn the present paper, we report the synthesis of bimodal mesoporous anatase TiO2 films by the EISA (Evaporation-Induced Self-Assembly) method using sol-gel chemistry combining two porogen agents, a low molecular weight ionic template and a neutral block copolymer. The surfactant template (C(16)mimCl) generates non-oriented worm-like pores (8 to 10 nm) which connect the regularly packed ellipsoidal mesopores (15 to 20 nm diameter) formed by an amphiphilic block copolymer of the type poly(isobutylene)-b-poly(ethylene oxide) (PIB-PEO). The surfactant template can also significantly influence the size and packing of the ellipsoidal mesopores. The mesostructural organization and mesoporosity of the films are studied by Environmental Ellipsometry-Porosimetry (EEP), Grazing-Incidence Small-Angle X-ray Scattering (GISAXS) and electron microscopy techniques. Electrochemical characterization is performed to study the permeability of the films to liquid solutions, using two types of probe moieties (K3FeIII(CN)(6) and Ru(bpy)(3)(2+)) by the wall-jet technique. An optimum ratio of C(16)mimCl/PIB-PEO provides anatase films with a continuous bimodal mesopore structure, possessing a permeability up to two times higher than that of the mesoporous films templated by PIB-PEO only (with partially isolated mesopores). When C(16)mimCl is used in large quantities, up to 20% weight vs. PIB-PEO, large overall porous volume and surface area are obtained, but the mesostructure is increasingly disrupted, leading to a severe loss of permeability of the bimodal films. A dye-sensitized solar cell set-up is used with anatase films as the photoelectrode. The photosensitizer loading and the total energy conversion efficiency of the solar cells using the mesoporous films templated by an optimal ratio of the two porogen agents C(16)mimCl and PIB-PEO can be substantially increased in comparison with the solar cells using mesoporous films templated by PIB-PEO only.en
dc.language.isoende_DE
dc.rightsNamensnennung 3.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/?la=de*
dc.subject.ddcddc:540de_DE
dc.titleBimodal mesoporous titanium dioxide anatase films templated by a block polymer and an ionic liquid: influence of the porosity on the permeabilityen
dc.typearticlede_DE
local.affiliationFB 08 - Biologie und Chemiede_DE
local.commentDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich. This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
local.opus.id15137
local.opus.instituteInstitute of Physical Chemistryde_DE
local.opus.fachgebietChemiede_DE
local.source.urihttps://doi.org/10.1039/c3nr02732e
local.source.freetextNanoscale, 5, 12316-12329, doi: 10.1039/c3nr02732ede_DE


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record