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Porous NiOx nanostructures templated by polystyrene-block-poly(2-vinylpyridine) diblock copolymer micelles

Title data

Bräutigam, Maximilian ; Weyell, Peter ; Rudolph, Tobias ; Dellith, Jan ; Krieck, Sven ; Schmalz, Holger ; Schacher, Felix H. ; Dietzek, Benjamin:
Porous NiOx nanostructures templated by polystyrene-block-poly(2-vinylpyridine) diblock copolymer micelles.
In: Journal of Materials Chemistry A. Vol. 2 (2014) Issue 17 . - pp. 6158-6166.
ISSN 2050-7496
DOI: https://doi.org/10.1039/C3TA14890D

Official URL: Volltext

Project information

Project financing: Studienstiftung des deutschen Volkes
Fonds der Chemischen Industrie
Carl-Zeiss Foundation
VCI

Abstract in another language

A facile synthetic route to NiOx nanostructures using various amphiphilic polystyrene-block-poly( 2-vinylpyridine) (PS-b-P2VP) diblock copolymers as templates was investigated. The synthesis targets NiOx nanostructures with a large surface area in order to allow an efficient functionalization, e. g., through loading with dyes to enable photo-induced hole injection for use in dye-sensitized solar cells or in (photo-) catalytic systems. The complete synthetic process to NiOx contains several steps: (i) the dissolution of the diblock copolymer, (ii) the subsequent addition of Ni2+, followed by the formation of core-corona micelles and eventually, (iii) further addition of Ni2+, resulting in the formation of a macroscopic precipitate. In all cases, (iv) deposition onto different substrates and calcination yielded NiOx films. All intermediates were thoroughly investigated using scanning or transmission electron microscopy, dynamic light scattering, and UV-vis spectroscopy. In contrast to the well-established synthetic route via the commercially available Pluronic F108 triblock copolymer, in our case a variety of different morphologies was found, i. e. spherical particles, toroid structures, or networks. Furthermore, the obtained BET area of about 50 m(2) g(-1) is comparable to the value for conventionally obtained NiOx surfaces. First dye sensitization experiments with coumarine 343 confirm that the dye binds to the surface, which is a prerequisite for using the material as a photo-electrode. The presented route to porous NiOx is easy and provides superior control over the morphology of the intermediates involved in nanostructure formation.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: ISI:000333580700026
Keywords: SENSITIZED SOLAR-CELLS; THIN-FILMS; VISIBLE-LIGHT; SPRAY-PYROLYSIS; NANOPARTICLES; METAL; WATER; DEPOSITION; BLOCK; PHOTOCATHODE
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Profile Fields > Advanced Fields > Polymer and Colloid Science
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 09 Apr 2015 13:02
Last Modified: 24 Apr 2015 07:11
URI: https://eref.uni-bayreuth.de/id/eprint/10046