資料載入中.....
|
請使用永久網址來引用或連結此文件:
https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/118688
|
| 題名: | Study of oxidation states of Fe- and Co-doped TiO2 photocatalytic energy materials and their visible-light-driven photocatalytic behavior |
| 作者: | Jaihindh, D. P.;Verma, A.;Chen, C. C.;Huang, Y. C.;Dong, C. L.;Fu, Y. P. |
| 關鍵詞: | Photocatalysts;XAS;EPR;Thermodynamic;Kinetics;Water splitting |
| 日期: | 2019-06-14 |
| 上傳時間: | 2020-06-01 12:13:37 (UTC+8) |
| 摘要: | In this work we propose a study to determine the structure of Fe and Co doped TiO2 by using the Fe K-edge, Co K-edge and Ti K- edge X-ray absorption near edge spectroscopy. The detailed analysis of Fe and Co-doped TiO2 before and after Methylene blue (MB) treatment was examined under the irradiation of 35 W xenon arc lamp for 3 h. The materials treated with MB were studied by X-ray absorption spectroscopy, EPR and FT-IR which revealed that the oxidation state of Co2+ was photo-oxidized to Co3+ and Fe3+ was photo-reduced to Fe2+ or less. Thermodynamic, kinetic properties were studied at different reaction temperature and the activation energy (Ea), enthalpy (ΔH), entropy (ΔS) and free energy (ΔG) of activation were calculated for the reaction. The activation energy has been found for TiO2, FeTiO2 and CoTiO2 as 24.771, 11.413 and 15.801 kJ mol−1 respectively. The structure, morphology and optical properties were studied by XRD, UV-diffuse reflectance spectra, FESEM, TEM and PL. Moreover, electrochemical studies were carried out to demonstrate the oxygen evolution reaction (OER) activity on TiO2, FeTiO2 and CoTiO2 in 1 M of H2SO4 electrolyte, with a scan rate of 50 mV s−1 and the as-prepared photocatalysts could act as the promising electrode materials for water splitting. |
| 關聯: | International Journal of Hydrogen Energy 44(30), p.15892-15906 |
| DOI: | 10.1016/j.ijhydene.2018.07.150 |
| 顯示於類別: | [物理學系暨研究所] 期刊論文
|
文件中的檔案:
| 檔案 |
描述 |
大小 | 格式 | 瀏覽次數 |
|---|
| index.html | | 0Kb | HTML | 131 | 檢視/開啟 |
|
在機構典藏中所有的資料項目都受到原著作權保護.
|
