Green fabrication of La-doped NaTa03 via H202 assisted sol-gel route for photocatalytic hydrogen production
In: Applied catalysis. B, Environmental, Jg. 102 (2011), Heft 1-2, S. 343-351
academicJournal
- print, 41 ref
Zugriff:
Crystalline NaTa03 nanoparticles doped with different concentrations of La3+ have been synthesized via a H202-assisted sol-gel route. In this reaction, TaCl5 is dissolved in aqueous H202 solution to form a stable transparent Ta-peroxo complex solution. The formation of tantalum-peroxo complexes and their chelation by citric acid enables a better control of crystal growth. X-ray diffraction and scanning/transmission electron microscopy provide useful information about crystallinity and morphology of the samples. The substitution of La3+ ions in the NaTa03 lattice is verified by crystallographic simulation (CaRIne Crystallography version 3.1). These results indicate La3+ ions occupy the Na+ ions sites, which agrees very well with the experimental data. The optimal content of La3+ ions effectively increases crystallinity without agglomeration, contributing to efficient charge separation and preventing recombination between photogenerated electrons and holes. The highest photocatalytic H2 production of 1.43 mmol h―1 is obtained for a 2.0 mol% La-doped NaTaO3 sample. The NaTa03 nanoparticles produced using this facile, environmentally friendly'green process' have better crystallinity, smaller size and higher photocatalytic activity.
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Green fabrication of La-doped NaTa03 via H202 assisted sol-gel route for photocatalytic hydrogen production
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Autor/in / Beteiligte Person: | HUSIN, Husni ; CHEN, Hung-Ming ; SU, Wei-Nien ; PAN, Chun-Jern ; CHUANG, Wei-Tsung ; SHEU, Hwo-Shuenn ; HWANG, Bing-Joe |
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Zeitschrift: | Applied catalysis. B, Environmental, Jg. 102 (2011), Heft 1-2, S. 343-351 |
Veröffentlichung: | Kidlington: Elsevier, 2011 |
Medientyp: | academicJournal |
Umfang: | print, 41 ref |
ISSN: | 0926-3373 (print) |
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