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Pore Structure Controlling the Activity of Mesoporous Crystalline CsTaWO6 for Photocatalytic Hydrogen Generation

Titelangaben

Weller, Tobias ; Sann, Joachim ; Marschall, Roland:
Pore Structure Controlling the Activity of Mesoporous Crystalline CsTaWO6 for Photocatalytic Hydrogen Generation.
In: Advanced Energy Materials. Bd. 6 (2016) Heft 16 . - 1600208.
ISSN 1614-6840
DOI: https://doi.org/10.1002/aenm.201600208

Angaben zu Projekten

Projektfinanzierung: Deutsche Forschungsgemeinschaft

Abstract

The quaternary oxide CsTaWO6 exhibits a very high activity for photocatalytic hydrogen generation and water splitting. To improve its properties with regard to photocatalytic applications, it is prepared with mesoporous morphology for the first time, utilizing a template-based evaporation-induced self-assembly process. The resulting material exhibits a median mesopore size of 10 nm, a surface area of 60 m2 g−1, and high crystallinity after preparation at 550 °C with phase-pure defect-pyrochlore structure. To further improve the textural properties of mesoporous CsTaWO6, the addition of additives to the synthesis procedure is also investigated. By using H2SO4/HCl and a carbonization/oxidation procedure, the surface area of the resulting mesoporous CsTaWO6 is increased to 78 m2 g−1, which is a 20-fold increase compared to a nonporous reference via sol-gel preparation, also leading to improved photocatalytic activity. By investigating the ability for photocatalytic hydrogen generation, the importance of high surface area and pore diameter of the resulting materials in comparison to nonporous materials is presented. Interestingly, the photocatalytic activity does not increase linearly with surface area, due to a strong influence of the pore diameter on the photocatalytic activity.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: hydrogen generation
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
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Physikalische Chemie III
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 05 Sep 2018 08:28
Letzte Änderung: 24 Okt 2023 12:20
URI: https://eref.uni-bayreuth.de/id/eprint/45721