Correlation between surface area and photocatalytic activity for acetaldehyde decomposition over bismuth tungstate particles with a hierarchical structure
The photocatalytic oxidative decomposition of gaseous acetaldehyde (AcH) in air under visible light irradiation (wavelength >400 nm) was driven by bismuth tungstate (Bi(2)WO(6)) polycrystalline particles with a hierarchical structure, flake-ball particles, prepared by hydrothermal reaction at var...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1992. - 26(2010), 10 vom: 18. Mai, Seite 7174-80 |
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| Weitere Verfasser: | , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2010
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Tungsten Compounds Acetaldehyde GO1N1ZPR3B Bismuth U015TT5I8H |
| Zusammenfassung: | The photocatalytic oxidative decomposition of gaseous acetaldehyde (AcH) in air under visible light irradiation (wavelength >400 nm) was driven by bismuth tungstate (Bi(2)WO(6)) polycrystalline particles with a hierarchical structure, flake-ball particles, prepared by hydrothermal reaction at various temperatures. Complete decomposition of AcH into CO(2) was proven for all of the flake-ball particle photocatalysts. The rate of CO(2) liberation was increased in proportional to the specific surface area for flake-ball particles with similar high degrees of crystallinity. Kinetic analysis assuming Langmuirian adsorption of AcH revealed that the initial rate of photocatalytic decomposition could be reproduced by first-order kinetics with respect to the amount of surface-adsorbed AcH. A linear relationship between the photocatalytic activity and surface area of photocatalysts under conditions in which other physical properties such as the photoabsorption property, crystalline content, exposed crystal facets, and secondary particle size are almost the same was experimentally revealed |
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| Beschreibung: | Date Completed 17.08.2010 Date Revised 21.11.2013 published: Print Citation Status MEDLINE |
| ISSN: | 1520-5827 |
| DOI: | 10.1021/la904274c |