| 학회 |
한국화학공학회 |
| 학술대회 |
2021년 가을 (10/27 ~ 10/29, 광주 김대중컨벤션센터) |
| 권호 |
27권 2호, p.2152 |
| 발표분야 |
재료 |
| 제목 |
Development of cost-effective light absorber based on black-titania/glass fiber for efficient solar desalination and solvent recovery |
| 초록 |
The development of cheap and sustainable photothermal absorbers has attracted tremendous attention due to their wide applications for solar desalination and solvent recovery. Titanium is the ninth most abundant element on our planet and its most common configuration is TiO2, which is also known as titania. In this study, using vacuum annealing we introduce oxygen vacancies into TiO2 lattice, which changes natural white color into deep black. Oxygen vacancies present a confined (defect) state in the bandgap, which acts as longer (as compared to bulk TiO2) wavelength light absorption centers. Developed black titania (B-TiO2) nanopowders exhibit broadband light absorption in the solar spectrum. The UV-Vis-NIR spectrophotometry showed that over 95% of incident light is being absorbed by B-TiO2. Changes in electronic and crystal structure of the TiO2 upon annealing were studied by the XPS and XRD respectively. For the solar-to-steam application, we manufacture light absorber via two-step process: first the samples was dipped into white TiO2 solution, then samples were transferred to tubular vacuum furnance for annealing it. |
| 저자 |
Hussain Sayed Sajid, Oleksii Omelianovych, 박은희, Nguyen Van-Tuan, 최호석
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| 소속 |
충남대 |
| 키워드 |
화공소재 |
| E-Mail |
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| 원문파일 |
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