Heteroepitaxial Growth of Well‐Dispersed Co 3 O 4 Nanocatalysts on Porous ZnO Nanoplates via Successive Hydrothermal Deposition
| Autor: | Xiaohong Xu, Yadong Yin, Zhenyu Feng, Jinhua Zhan, Xicheng Ma, Wenya Bao |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Nanocomposite 010405 organic chemistry Renewable Energy Sustainability and the Environment Thermal decomposition Energy Engineering and Power Technology Nanoparticle Nanotechnology 010402 general chemistry 01 natural sciences Hydrothermal circulation Nanomaterial-based catalyst 0104 chemical sciences Nanomaterials Biomaterials Chemical engineering Nanocrystal Materials Chemistry Hydrozincite |
| Zdroj: | ChemNanoMat. 2:946-951 |
| ISSN: | 2199-692X |
| DOI: | 10.1002/cnma.201600204 |
| Popis: | We report a unique successive hydrothermal deposition method for the heteroepitaxial growth of well-dispersed crystalline Co3O4 nanoparticles on single-crystalline porous ZnO nanoplates toward a Co3O4/ZnO nanocomposite catalyst. The specific heteroepitaxial crystal faces between Co3O4 and ZnO limit the size of Co3O4 particles to be approximately 5 nm and allow the exposure of more active sites. The intermediate of hydrozincite [Zn5(CO3)2(OH)6] plays a role as template in creating porous ZnO nanoplates and oriented Co3O4 grains via thermal decomposition process. The active exposure of the catalyst is probed by CO oxidation. The nanocomposite exhibits significantly enhanced catalytic efficiency towards CO oxidation at temperatures ranging from 30 to 115 °C, in comparison with a homogeneous Co3O4 sample and one-step Co/ZnO products. |
| Databáze: | OpenAIRE |
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