Precursor-Derived Rare Earth Metal Pyrochlores: Nd2Sn2O7 Nanofibers and Thin Films As Efficient Photoabsorbers
| Autor: | Ashish Lepcha, Aida Jamil, Sanjay Mathur, Yakup Gönüllü, Johannes Schläfer |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Pyrochlore Mineralogy 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electrospinning 0104 chemical sciences Amorphous solid Chemical engineering Nanofiber engineering Water splitting General Materials Science Thin film 0210 nano-technology Bimetallic strip Single crystal |
| Zdroj: | Crystal Growth & Design. 16:5260-5267 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/acs.cgd.6b00815 |
| Popis: | Single phase rare earth pyrochlores, Ln2M2O7, were produced as nanofibers and thin films by electrospinning and spin-coating of chemical sols obtained from bimetallic metal–organic precursors, LnIIIMII(OtBu)5Py (LnIII = La, Pr, Nd, Sm, Er, Yb; MII = Ge, Sn, Pb; Py = pyridine). Compatibility of the metal ratio in the single-source compounds was confirmed by single crystal X-ray diffraction analyses and the ratio was preserved during the processing as the crystalline pyrochlore materials originated from an amorphous preceramic aggregate as confirmed by powder XRD and TEM studies. The photocatalytic activity of the Nd2Sn2O7 nanofibers was found to be significantly higher than that of TiO2. Nd2Sn2O7 thin films deposited on F:SnO2 as bilayered Nd2Sn2O7//Fe2O3 photoanodes showed superior photoelectrochemical (PEC) efficiency for water splitting reaction with an over 3-fold higher photocurrent density than bare Fe2O3 photoanodes. |
| Databáze: | OpenAIRE |
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