The Phase Evolution and Photocatalytic Properties of a Ti-TiO2 Bilayer Thin Film Prepared Using Thermal Oxidation
| Autor: | Yaw-Teng Tseng, Endrika Widyastuti, Fu-Yang Xu, Tzu-Che Lin, Y. C. Lee, Chen-Tien Chiu, Ping-Yuan Lee |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Anatase
Materials science 02 engineering and technology Substrate (electronics) bilayer thin films 01 natural sciences 0103 physical sciences Materials Chemistry Thin film 010302 applied physics Thermal oxidation thermal oxidation Bilayer technology industry and agriculture Surfaces and Interfaces Sputter deposition 021001 nanoscience & nanotechnology Engineering (General). Civil engineering (General) photocatalytic Surfaces Coatings and Films Amorphous solid Chemical engineering TA1-2040 0210 nano-technology Layer (electronics) TiO2 |
| Zdroj: | Coatings Volume 11 Issue 7 Coatings, Vol 11, Iss 808, p 808 (2021) |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11070808 |
| Popis: | Ti-TiO2 bilayer thin films were successfully prepared onto a glass substrate using magnetron sputtering with different TiO2 bottom layer conditions. These represent a lack of (as-deposited) and full oxygen content (annealed). Single-layer Ti was additionally used as a control. The influence of oxygen diffusion phenomena of the bottom layer of TiO2 to the upper layer of Ti thin films at different oxidation temperatures on structural, optical, and photocatalytic performance was investigated. X-ray diffraction (XRD) results confirmed that the crystalline phases coexisting on thin-film samples oxidized at 450 °C were TiO, TiO1.4, (bilayer, as-deposited TiO2), anatase (bilayer, annealed TiO2), and rutile (single and bilayer). This finding showed that the film’s phase structure evolution is significantly affected by oxygen diffusion from the bottom layer. Further increasing the thermal oxidation temperature caused a notable decline in the amorphous zone in bilayer thin films based on TEM analysis. Bilayer thin films lead to higher degradation of methylene blue under UV light radiation (63%) than single-layer films (45%) oxidized at 450 °C. High photocatalytic activity performance was found in the bilayer annealed TiO2-Ti thin-film sample. This study demonstrates that the bilayer modification strategy promotes the oxygen-induced bottom layer of TiO2 bilayer thin films. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|