Coprecipitation synthesis of a green Co-doped wurtzite structure high near-infrared reflective pigments using ammonia as precipitant
| Autor: | Shanqi Xu, Yin Zhang, Sha Li, Jiapan Luan, Nianying Zhou, Shuai Sha |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Coprecipitation chemistry.chemical_element 02 engineering and technology Crystal structure 010402 general chemistry 01 natural sciences law.invention Ammonia chemistry.chemical_compound law Materials Chemistry Calcination Thermal stability Wurtzite crystal structure Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Mechanics of Materials Chemical stability sense organs 0210 nano-technology Cobalt Nuclear chemistry |
| Zdroj: | Journal of Alloys and Compounds. 820:153183 |
| ISSN: | 0925-8388 |
| Popis: | A low content cobalt of green pigments have been synthesized by coprecipitation method. The pigments were characterized by XRD, SEM, TG-DSC, UV–vis and CIE L*a*b*C*h* colorimetric. The results show that the calcination temperature for the prepared pigments are only 1000 °C and all pigments maintain the basic ZnO crystal structure. The coprecipitation method and the ammonia as a precipitant can obtain fine and uniform particles, good colorimetric performance (a* = −17.25) and high near infrared reflectance value. Finally, the synthesized pigments were applied to the roof surface of a self-made experimental device for application testing, the results showed that the room temperature at which the roof was coated with the sample was nearly 10 °C lower than which the ordinary pigments were applied. So, the synthesized pigments have good thermal stability, chemical stability, high near infrared reflectance, and low cobalt nitrate content (1.92 wt%). Also, they are the excellent candidates for cool pigments. |
| Databáze: | OpenAIRE |
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