Hydrothermal synthesis of ternary α-Fe2O3–ZnO–Au nano composites with high gas-sensing performance
This study reports facile hydrothermal strategies for the synthesis of novel ternary α-Fe2O3–ZnO–Au nanocomposites under mild conditions, through further surface coating of ZnO and Au nanoparticles (NPs) on α-Fe2O3 nanorods. The ternary α-Fe2O3–ZnO–Au nanocomposites are found to show (1) higher sens...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/28299 |
| _version_ | 1848752498594021376 |
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| author | Yusuf Valentino Kaneti Julien Moriceau Minsu Liu Yuan Yuan Quadir, Md Zakaria Xuchuan Jiang Aibing Yu |
| author_facet | Yusuf Valentino Kaneti Julien Moriceau Minsu Liu Yuan Yuan Quadir, Md Zakaria Xuchuan Jiang Aibing Yu |
| author_sort | Yusuf Valentino Kaneti |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study reports facile hydrothermal strategies for the synthesis of novel ternary α-Fe2O3–ZnO–Au nanocomposites under mild conditions, through further surface coating of ZnO and Au nanoparticles (NPs) on α-Fe2O3 nanorods. The ternary α-Fe2O3–ZnO–Au nanocomposites are found to show (1) higher sensitivity/responses (S) of 113 and 57 toward 100-ppm n-butanol and acetone, respectively compared to single α-Fe2O3 (S = 11.7, 9.1 for n-butanol, acetone) and binary α-Fe2O3-ZnO (S = 54.4, 28 for n-butanol, acetone) sensing materials, and (2) lower optimum operating temperature, i.e., 225 °C. The enhanced sensitivity could be attributed to the chemical sensitization effect induced by the Au NPs, and the existence of conjugated depletion layers in the nanocomposites which promote a greater drop in resistance upon exposure to the gas. These results will be useful for future design of iron oxide-based ternary nanocomposites as gas-sensing materials with high sensitivity, selectivity and stability. |
| first_indexed | 2025-11-14T08:09:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-28299 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:09:35Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-282992017-01-30T13:04:15Z Hydrothermal synthesis of ternary α-Fe2O3–ZnO–Au nano composites with high gas-sensing performance Yusuf Valentino Kaneti Julien Moriceau Minsu Liu Yuan Yuan Quadir, Md Zakaria Xuchuan Jiang Aibing Yu This study reports facile hydrothermal strategies for the synthesis of novel ternary α-Fe2O3–ZnO–Au nanocomposites under mild conditions, through further surface coating of ZnO and Au nanoparticles (NPs) on α-Fe2O3 nanorods. The ternary α-Fe2O3–ZnO–Au nanocomposites are found to show (1) higher sensitivity/responses (S) of 113 and 57 toward 100-ppm n-butanol and acetone, respectively compared to single α-Fe2O3 (S = 11.7, 9.1 for n-butanol, acetone) and binary α-Fe2O3-ZnO (S = 54.4, 28 for n-butanol, acetone) sensing materials, and (2) lower optimum operating temperature, i.e., 225 °C. The enhanced sensitivity could be attributed to the chemical sensitization effect induced by the Au NPs, and the existence of conjugated depletion layers in the nanocomposites which promote a greater drop in resistance upon exposure to the gas. These results will be useful for future design of iron oxide-based ternary nanocomposites as gas-sensing materials with high sensitivity, selectivity and stability. 2014 Journal Article http://hdl.handle.net/20.500.11937/28299 Elsevier restricted |
| spellingShingle | Yusuf Valentino Kaneti Julien Moriceau Minsu Liu Yuan Yuan Quadir, Md Zakaria Xuchuan Jiang Aibing Yu Hydrothermal synthesis of ternary α-Fe2O3–ZnO–Au nano composites with high gas-sensing performance |
| title | Hydrothermal synthesis of ternary α-Fe2O3–ZnO–Au nano composites with high gas-sensing performance |
| title_full | Hydrothermal synthesis of ternary α-Fe2O3–ZnO–Au nano composites with high gas-sensing performance |
| title_fullStr | Hydrothermal synthesis of ternary α-Fe2O3–ZnO–Au nano composites with high gas-sensing performance |
| title_full_unstemmed | Hydrothermal synthesis of ternary α-Fe2O3–ZnO–Au nano composites with high gas-sensing performance |
| title_short | Hydrothermal synthesis of ternary α-Fe2O3–ZnO–Au nano composites with high gas-sensing performance |
| title_sort | hydrothermal synthesis of ternary α-fe2o3–zno–au nano composites with high gas-sensing performance |
| url | http://hdl.handle.net/20.500.11937/28299 |