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Artificial photosynthesis for solar hydrogen generation over transition-metal substituted Keggin-type titanium tungstate.
- Source :
- New Journal of Chemistry; 2014, Vol. 38 Issue 3, p1315-1320, 6p
- Publication Year :
- 2014
-
Abstract
- The photocatalytic hydrogen (H<subscript>2</subscript>) evolution with transition-metal substituted Keggin-type titanium tungstates Na<subscript>5(6)</subscript>[MTiW<subscript>11</subscript>O<subscript>39</subscript>]·xH<subscript>2</subscript>O (abbreviated as TiW<subscript>11</subscript>M (M = Fe, Co, Zn)) as photocatalyst was reported. They showed good photocatalytic activities toward H<subscript>2</subscript> evolution in homogeneous systems under simulated solar light irradiation. The order of photocatalytic activity was TiW<subscript>11</subscript>Co ≈ TiW<subscript>11</subscript>Zn > TiW<subscript>11</subscript>Fe > H<subscript>3</subscript>PW<subscript>12</subscript>O<subscript>40</subscript> (PW<subscript>12</subscript>). The selected POMs showed good stability during the reactions. Karl Fischer analysis, ICPE (Inductive Coupled Plasma Emission) and FT-IR (Fourier Transform Infrared Spectroscopy) were used to confirm the composition and structure. UV-Vis absorption spectra, kinetics investigation and cyclic voltammetric characterizations were used to explain the photocatalytic results. Finally, an analogous “Z-scheme” mechanism was proposed for the homogeneous systems toward photocatalytic H<subscript>2</subscript> evolution under simulated solar light irradiation. [ABSTRACT FROM AUTHOR]
- Subjects :
- PHOTOSYNTHESIS
HYDROGEN
TRANSITION metal alloys
KEGGIN anions
TITANIUM
Subjects
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 38
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 100402625
- Full Text :
- https://doi.org/10.1039/c3nj01184d