Nanosheet coated dual-shell TiO2 sphere with high solar reflectance for thermal-shield materials
| Autor: | Dae-Sung Kim, Kyoung-Seok Moon, Hyewon Mun, Dong Kyu Roh, Hyunmo Jae, Hee Jung Kim |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Shell (structure) 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Light scattering 0104 chemical sciences Core (optical fiber) Reflection (mathematics) Coating Mechanics of Materials Rutile Materials Chemistry Ceramics and Composites engineering Composite material 0210 nano-technology Layer (electronics) Nanosheet |
| Zdroj: | Composites Communications. 22:100432 |
| ISSN: | 2452-2139 |
| DOI: | 10.1016/j.coco.2020.100432 |
| Popis: | A dual-shell TiO2 sphere, composed of a TiO2 sphere (TS) core and SiO2 layer (SL)/TiO2 nanosheet (TNS) double shell, was prepared as a novel thermal-shield material. The high reflective rutile TiO2 core was easily synthesized via a solvothermal reaction, and then SL/TNS double shell was sequentially coated on the TiO2 core via two-step coating. This multilayer structure enhanced the solar reflectance via constructive interference between the high- and low-refractive index layers, suggesting a positive impact on potential applications as a thermal-shielding material. Moreover, the multi-faceted reflection derived from vertical growth TNS outer layer can lead to improvement in the solar reflectance caused by maximization of light scattering. As a result, it showed outstanding near infrared- and visible-reflectance value of approximately 87% and 91%, respectively, which are higher than those of neat TS and commercial TiO2. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect