Influence of Co<sub>3</sub>O<sub>4</sub> Nanostructure Morphology on the Catalytic Degradation of p-Nitrophenol
The design and fabrication of nanomaterials with controllable morphology and size is of critical importance to achieve excellent catalytic performance in heterogeneous catalysis. In this work, cobalt oxide (Co<sub>3</sub>O<sub>4</sub>) nanostructures with different morphologi...
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MDPI AG
2023-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/21/7396 |
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| author | Huihui Chen Mei Yang Yuan Liu Jun Yue Guangwen Chen |
| author_facet | Huihui Chen Mei Yang Yuan Liu Jun Yue Guangwen Chen |
| author_sort | Huihui Chen |
| collection | DOAJ |
| description | The design and fabrication of nanomaterials with controllable morphology and size is of critical importance to achieve excellent catalytic performance in heterogeneous catalysis. In this work, cobalt oxide (Co<sub>3</sub>O<sub>4</sub>) nanostructures with different morphologies (nanoplates, microflowers, nanorods and nanocubes) were successfully constructed in order to establish the morphology–property–performance relationship of the catalysts. The morphology and structure of the nanostructured Co<sub>3</sub>O<sub>4</sub> were characterized by various techniques, and the catalytic performance of the as-prepared nanostructures was studied by monitoring the reduction of p-nitrophenol to p-aminophenol in the presence of excess NaBH<sub>4</sub>. The catalytic performance was found to be strongly dependent on their morphologies. The experimental results show that the pseudo-first-order reaction rate constants for Co<sub>3</sub>O<sub>4</sub> nanostructures with various shapes are, respectively, 1.49 min<sup>−1</sup> (nanoplates), 1.40 min<sup>−1</sup> (microflowers), 0.78 min<sup>−1</sup> (nanorods) and 0.23 min<sup>−1</sup> (nanocubes). The Co<sub>3</sub>O<sub>4</sub> nanoplates exhibited the highest catalytic activity among the four nanostructures, due to their largest specific surface area, relatively high total pore volume, best redox properties and abundance of defect sites. The established correlation between morphology, property and catalytic performance in this work will offer valuable insight into the design and application of nanostructured Co<sub>3</sub>O<sub>4</sub> as a potential non-noble metal catalyst for p-nitrophenol reduction. |
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| spelling | doaj.art-d9d76b8735e34b7f98c349321c913e702023-11-10T15:08:52ZengMDPI AGMolecules1420-30492023-11-012821739610.3390/molecules28217396Influence of Co<sub>3</sub>O<sub>4</sub> Nanostructure Morphology on the Catalytic Degradation of p-NitrophenolHuihui Chen0Mei Yang1Yuan Liu2Jun Yue3Guangwen Chen4School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, ChinaDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, ChinaSchool of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, ChinaDepartment of Chemical Engineering, Engineering and Technology Institute Groningen, University of Groningen, 9747 AG Groningen, The NetherlandsDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, ChinaThe design and fabrication of nanomaterials with controllable morphology and size is of critical importance to achieve excellent catalytic performance in heterogeneous catalysis. In this work, cobalt oxide (Co<sub>3</sub>O<sub>4</sub>) nanostructures with different morphologies (nanoplates, microflowers, nanorods and nanocubes) were successfully constructed in order to establish the morphology–property–performance relationship of the catalysts. The morphology and structure of the nanostructured Co<sub>3</sub>O<sub>4</sub> were characterized by various techniques, and the catalytic performance of the as-prepared nanostructures was studied by monitoring the reduction of p-nitrophenol to p-aminophenol in the presence of excess NaBH<sub>4</sub>. The catalytic performance was found to be strongly dependent on their morphologies. The experimental results show that the pseudo-first-order reaction rate constants for Co<sub>3</sub>O<sub>4</sub> nanostructures with various shapes are, respectively, 1.49 min<sup>−1</sup> (nanoplates), 1.40 min<sup>−1</sup> (microflowers), 0.78 min<sup>−1</sup> (nanorods) and 0.23 min<sup>−1</sup> (nanocubes). The Co<sub>3</sub>O<sub>4</sub> nanoplates exhibited the highest catalytic activity among the four nanostructures, due to their largest specific surface area, relatively high total pore volume, best redox properties and abundance of defect sites. The established correlation between morphology, property and catalytic performance in this work will offer valuable insight into the design and application of nanostructured Co<sub>3</sub>O<sub>4</sub> as a potential non-noble metal catalyst for p-nitrophenol reduction.https://www.mdpi.com/1420-3049/28/21/7396cobalt oxidemorphology controlp-nitrophenolnanostructurecatalysis |
| spellingShingle | Huihui Chen Mei Yang Yuan Liu Jun Yue Guangwen Chen Influence of Co<sub>3</sub>O<sub>4</sub> Nanostructure Morphology on the Catalytic Degradation of p-Nitrophenol Molecules cobalt oxide morphology control p-nitrophenol nanostructure catalysis |
| title | Influence of Co<sub>3</sub>O<sub>4</sub> Nanostructure Morphology on the Catalytic Degradation of p-Nitrophenol |
| title_full | Influence of Co<sub>3</sub>O<sub>4</sub> Nanostructure Morphology on the Catalytic Degradation of p-Nitrophenol |
| title_fullStr | Influence of Co<sub>3</sub>O<sub>4</sub> Nanostructure Morphology on the Catalytic Degradation of p-Nitrophenol |
| title_full_unstemmed | Influence of Co<sub>3</sub>O<sub>4</sub> Nanostructure Morphology on the Catalytic Degradation of p-Nitrophenol |
| title_short | Influence of Co<sub>3</sub>O<sub>4</sub> Nanostructure Morphology on the Catalytic Degradation of p-Nitrophenol |
| title_sort | influence of co sub 3 sub o sub 4 sub nanostructure morphology on the catalytic degradation of p nitrophenol |
| topic | cobalt oxide morphology control p-nitrophenol nanostructure catalysis |
| url | https://www.mdpi.com/1420-3049/28/21/7396 |
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