J. Mater. Sci. Technol. ›› 2017, Vol. 33 ›› Issue (6): 527-534.DOI: 10.1016/j.jmst.2016.11.011
• Orginal Article • Previous Articles Next Articles
Opra Denis P.1(), Gnedenkov Sergey V.1, Sinebryukhov Sergey L.1, Voit Elena I.1, Sokolov AlexanderA.1, Modin Evgeny B.2, Podgorbunsky Anatoly B.1, Sushkov Yury V.1, Zheleznov Veniamin V.1
Received:
2016-07-22
Revised:
2016-09-22
Accepted:
2016-11-02
Online:
2017-06-20
Published:
2017-08-22
About author:
These authors contributed equally to this work.
Opra Denis P., Gnedenkov Sergey V., Sinebryukhov Sergey L., Voit Elena I., Sokolov AlexanderA., Modin Evgeny B., Podgorbunsky Anatoly B., Sushkov Yury V., Zheleznov Veniamin V.. Characterization and Electrochemical Properties of Nanostructured Zr-Doped Anatase TiO2 Tubes Synthesized by Sol-Gel Template Route[J]. J. Mater. Sci. Technol., 2017, 33(6): 527-534.
Sample | Concentration (at.%) | Zr/Ti ratio | ||
---|---|---|---|---|
Ti | Zr | Si | ||
ZT-0 | 31.0 | 0.0 | 2.0 | 0.00 |
ZT-1 | 30.7 | 0.3 | 2.0 | 0.01 |
ZT-2 | 30.4 | 0.6 | 2.0 | 0.02 |
ZT-3 | 30.0 | 1.0 | 2.0 | 0.03 |
ZT-4 | 28.4 | 2.6 | 2.0 | 0.09 |
Table 1. EDX results for the as-synthesized materials
Sample | Concentration (at.%) | Zr/Ti ratio | ||
---|---|---|---|---|
Ti | Zr | Si | ||
ZT-0 | 31.0 | 0.0 | 2.0 | 0.00 |
ZT-1 | 30.7 | 0.3 | 2.0 | 0.01 |
ZT-2 | 30.4 | 0.6 | 2.0 | 0.02 |
ZT-3 | 30.0 | 1.0 | 2.0 | 0.03 |
ZT-4 | 28.4 | 2.6 | 2.0 | 0.09 |
Zr/Ti ratio | Peak maximum (cm-1) | ||
---|---|---|---|
Eg(1) | B1g(1) | Eg(3) | |
0.00 | 147.5 | 396.7 | 638.7 |
0.01 | 144.4 | 395.1 | 638.1 |
0.02 | 143.8 | 394.5 | 637.7 |
0.03 | 143.2 | 392.2 | 637.4 |
0.09 | 144.7 | 395.7 | 638.0 |
Table 2. Dependence of Eg(1), B1g(1), and Eg(3) peaks positions on Zr/Ti molar ratio
Zr/Ti ratio | Peak maximum (cm-1) | ||
---|---|---|---|
Eg(1) | B1g(1) | Eg(3) | |
0.00 | 147.5 | 396.7 | 638.7 |
0.01 | 144.4 | 395.1 | 638.1 |
0.02 | 143.8 | 394.5 | 637.7 |
0.03 | 143.2 | 392.2 | 637.4 |
0.09 | 144.7 | 395.7 | 638.0 |
Fig. 6. Impedance spectra of ZT-0 (□), ZT-1 (▼), ZT-2 (○), ZT-3 (?), and ZT-4 (●) pellets at room temperature. The frequencies of 0.1 Hz and 0.01 Hz are marked by solid symbols.
Fig. 7. Nyquist plots of half-cells with ZT-0 (□), ZT-1 (▼), ZT-2 (○), ZT-3 (?), and ZT-4 (●) electrodes (a). Symbols are the experimental data, while the solid lines are the fitted curves calculated with the use of equivalent electric circuit (b). The frequencies of 0.1 Hz and 0.01 Hz are marked by solid symbols.
Fig. 8. Charge/discharge profiles of ZT-0, ZT-1, ZT-2, ZT-3, ZT-4 electrodes for the 1st (solid), 2nd (dashed), and 10th (dotted) cycles at a C/10-rate.
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