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A crystalline and 3D periodically ordered mesoporous quaternary semiconductor for photocatalytic hydrogen generation

Titelangaben

Weller, Tobias ; Deilmann, Leonie ; Timm, Jana ; Dörr, Tobias S. ; Beaucage, Peter A. ; Cherevan, Alexey S. ; Wiesner, Ulrich B. ; Eder, Dominik ; Marschall, Roland:
A crystalline and 3D periodically ordered mesoporous quaternary semiconductor for photocatalytic hydrogen generation.
In: Nanoscale. Bd. 10 (2018) Heft 7 . - S. 3225-3234.
ISSN 2040-3364
DOI: https://doi.org/10.1039/c7nr09251b

Angaben zu Projekten

Projektfinanzierung: Deutsche Forschungsgemeinschaft

Abstract

We have prepared the first crystalline and 3D periodically ordered mesoporous quaternary semiconductor photocatalyst in an evaporation-induced self-assembly assisted soft-templating process. Using lab synthesized triblock-terpolymer poly(isoprene-b-styrene-b-ethylene oxide) (ISO) a highly ordered 3D interconnected alternating gyroid morphology was achieved exhibiting near and long-range order, as evidenced by small angle X-ray scattering (SAXS) and electron microscopy (TEM/SEM). Moreover, we reveal the formation process on the phase-pure construction of the material's pore-walls with its high crystallinity, which proceeds along a highly stable W5+ compound, by both in situ and ex situ analyses, including X-ray powder diffraction (XRPD), Fourier transform infrared spectroscopy (FTIR) and electron paramagnetic resonance (EPR). The resulting photocatalyst CsTaWO6 with its optimum balance between surface area and ordered mesoporosity ultimately shows superior hydrogen evolution rates over its non-ordered reference in photocatalytic hydrogen production. This work will help to advance new self-assembly preparation pathways towards multi-element multifunctional compounds for different applications, including improved battery and sensor electrode materials.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Physikalische Chemie III > Lehrstuhl Physikalische Chemie III - Univ.-Prof. Dr. Roland Marschall
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 05 Sep 2018 08:26
Letzte Änderung: 30 Okt 2018 07:40
URI: https://eref.uni-bayreuth.de/id/eprint/45720