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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Fresno, F. Coronado, J. M. Reñones, P. O'Shea, V. A. de Peña Serrano, D. P. Jana, P. |
| Copyright Year | 2017 |
| Abstract | The activity of NaNbO3 and NaTaO3 perovskites for the photocatalytic reduction of CO2 is studied in this work. For this purpose, sodium niobate and tantalate have been prepared using solid-state reactions, extensively characterised by means of powder X-ray diffraction, UV-vis, photoluminescence and Raman spectroscopies and N2 adsorption isotherms, and tested in the gas-phase reduction of CO2 under UV light in a continuous flow photoreactor. NaNbO3 is constituted of an orthorhombically distorted perovskite structure, while a ca. 4.5 : 1 combination of the orthorhombic and monoclinic modifications is found in the tantalate. Both catalysts exhibit interesting intrinsic activities, with the tantalate material giving rise to a slightly higher performance. This is attributed to a compromise situation between electron–hole recombination and the reducing potential of conduction band electrons. In addition, a decrease in the competition of water protons for photogenerated electrons is observed with both catalysts with respect to TiO2. |
| Starting Page | 17 |
| Ending Page | 23 |
| Page Count | 7 |
| File Format | HTM / HTML PDF |
| ISSN | 1474905X |
| Volume Number | 16 |
| Issue Number | 1 |
| Journal | Photochemical & Photobiological Sciences |
| DOI | 10.1039/c6pp00235h |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | X-ray crystallography Sodium Adsorption Monoclinic crystal system Photoluminescence Orthorhombic crystal system Carrier generation and recombination Valence and conduction bands Raman Perovskite (structure) Intrinsic activity |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physical and Theoretical Chemistry |
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