Spindle-like porous N-doped TiO2 encapsulated (Ca,Y)F2:Yb3+,Tm3+ as the efficient photocatalyst near-infrared range
| Autor: | Ning Liu, Chaoqun Xia, Hongshui Wang, Lu Wang, Tai Yang, Chunyong Liang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Band gap Nanoporous Mechanical Engineering Doping Composite number Analytical chemistry Bioengineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Photon upconversion Hydrothermal circulation 0104 chemical sciences Mechanics of Materials Photocatalysis General Materials Science Nanorod Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Nanotechnology. 31:025601 |
| ISSN: | 1361-6528 0957-4484 |
| Popis: | In this study, a novel photocatalyst composed of N-doped TiO2 (N-TiO2) and (Ca, Y)F2:Yb3+, Tm3+ was prepared by simple dealloying followed by a hydrothermal method. The composite exhibits a homogeneous nanoporous structure consisting of large quantities of the spindle-like N-doped TiO2 nanorods, on which the (Ca, Y)F2:Yb3+, Tm3+ particles with a diameter of around 5 nm are uniformly dispersed. In addition, morphology and property of the N-TiO2 can be controlled by adjusting the dealloying period. Results show that a short immersion time leads to a small size, large surface area and low band gap. As a result, the N-TiO2/(Ca, Y)F2:Yb3+, Tm3+ composite after dealloying for 48 h (TiO2-48-C) exhibits higher degradation rates (65.6% for 10 h irradiation by 980 nm NIR) than others after dealloying for 60 h (TiO2-60-C) and 72 h (TiO2-72-C), indicating its excellent potential for practical applications. |
| Databáze: | OpenAIRE |
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