Spherical CuO superstructures originating from hierarchical malachite microspheres by different post-treatment routes: a comparison study of the morphology and the catalytic property
| Autor: | Yonghong Ni, Shiyong Ye, Yuxing Zhang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Morphology (linguistics)
Materials science General Chemical Engineering Thermal decomposition Nanotechnology Malachite 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis Microsphere law.invention Chemical engineering law visual_art visual_art.visual_art_medium Calcination 0210 nano-technology High-resolution transmission electron microscopy Porosity |
| Zdroj: | RSC Advances. 6:7086-7092 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c5ra24701b |
| Popis: | In this paper, spherical CuO superstructures were obtained by employing freshly-produced hierarchical malachite (Cu2(OH)2CO3) microspheres as the precursor in two different post-treatment approaches. Experiments showed that spherical CuO superstructures constructed by porous nanocuboids with a mean size of ∼50 nm were prepared after the hierarchical malachite microspheres had been calcined in air at 300 °C for 2 h, while spherical CuO ones built up of abundant nanosheets with a mean thickness of ∼10 nm were formed by post-treatment of the hierarchical malachite microspheres in NaOH solution at 60 °C for 15 min. The products were characterized by XRD, SEM, HRTEM/TEM, IR and TG-DTA. It was found that CuO superstructures with different shapes presented different catalytic activities for the reduction of 4-nitrophenol to 4-aminophenol in excess NaBH4 solution and for the thermal decomposition of NH4ClO4. |
| Databáze: | OpenAIRE |
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