Facile hydrothermal synthesis of novel Cu2O core-shell nanospheres via a template-free route
Novel cuprous oxide Cu2O core-shell nanospheres with diameter around 445 nm have been successfully fabricated by a facile, one-pot and template-free route. The synthesis of these nanospheres is accomplished through a hydrothermal reaction of cupric acetate with o-anisidine as the reducing agent. Bas...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/96506 http://hdl.handle.net/10220/17275 |
| _version_ | 1826124366596800512 |
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| author | Zhang, Huijuan Wong, C. Cheong Cui, Yuchi |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Zhang, Huijuan Wong, C. Cheong Cui, Yuchi |
| author_sort | Zhang, Huijuan |
| collection | NTU |
| description | Novel cuprous oxide Cu2O core-shell nanospheres with diameter around 445 nm have been successfully fabricated by a facile, one-pot and template-free route. The synthesis of these nanospheres is accomplished through a hydrothermal reaction of cupric acetate with o-anisidine as the reducing agent. Based on the structural and compositional evolution, the process mechanism was proposed to initiate with the formation of intermediate non-crystalline nanospheres. Subsequent reductive conversion of these intermediates to CuO/Cu2O nanocrystallite aggregates is followed by a spontaneous hollowing process in which core-shell nanospheres form by inside-out Ostwald ripening. The phase purity of the Cu2O can be improved by prolonging the aging time or increasing the starting concentration of o-anisidine. These Cu2O nanospheres have an absorption band within the visible range with a peak at 470 nm and may be potentially applicable for solar energy conversion. |
| first_indexed | 2024-10-01T06:19:28Z |
| format | Journal Article |
| id | ntu-10356/96506 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:19:28Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/965062020-06-01T10:13:34Z Facile hydrothermal synthesis of novel Cu2O core-shell nanospheres via a template-free route Zhang, Huijuan Wong, C. Cheong Cui, Yuchi School of Materials Science & Engineering Novel cuprous oxide Cu2O core-shell nanospheres with diameter around 445 nm have been successfully fabricated by a facile, one-pot and template-free route. The synthesis of these nanospheres is accomplished through a hydrothermal reaction of cupric acetate with o-anisidine as the reducing agent. Based on the structural and compositional evolution, the process mechanism was proposed to initiate with the formation of intermediate non-crystalline nanospheres. Subsequent reductive conversion of these intermediates to CuO/Cu2O nanocrystallite aggregates is followed by a spontaneous hollowing process in which core-shell nanospheres form by inside-out Ostwald ripening. The phase purity of the Cu2O can be improved by prolonging the aging time or increasing the starting concentration of o-anisidine. These Cu2O nanospheres have an absorption band within the visible range with a peak at 470 nm and may be potentially applicable for solar energy conversion. 2013-11-05T05:55:45Z 2019-12-06T19:31:33Z 2013-11-05T05:55:45Z 2019-12-06T19:31:33Z 2012 2012 Journal Article Cui, Y., Zhang, H., & Wong, C. C. (2012). Facile hydrothermal synthesis of novel Cu2O core-shell nanospheres via a template-free route. Materials Letters, 86, 104-107. 0167-577X https://hdl.handle.net/10356/96506 http://hdl.handle.net/10220/17275 10.1016/j.matlet.2012.06.021 en Materials letters |
| spellingShingle | Zhang, Huijuan Wong, C. Cheong Cui, Yuchi Facile hydrothermal synthesis of novel Cu2O core-shell nanospheres via a template-free route |
| title | Facile hydrothermal synthesis of novel Cu2O core-shell nanospheres via a template-free route |
| title_full | Facile hydrothermal synthesis of novel Cu2O core-shell nanospheres via a template-free route |
| title_fullStr | Facile hydrothermal synthesis of novel Cu2O core-shell nanospheres via a template-free route |
| title_full_unstemmed | Facile hydrothermal synthesis of novel Cu2O core-shell nanospheres via a template-free route |
| title_short | Facile hydrothermal synthesis of novel Cu2O core-shell nanospheres via a template-free route |
| title_sort | facile hydrothermal synthesis of novel cu2o core shell nanospheres via a template free route |
| url | https://hdl.handle.net/10356/96506 http://hdl.handle.net/10220/17275 |
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