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| 论文编号: |
122214O120130068 |
| 第一作者所在部门: |
704组 |
| 中文论文题目: |
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| 英文论文题目: |
Hexagonal α-Fe2O3 nanorods bound by high-index facets as high-performance electrochemical sensor
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| 论文题目英文: |
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| 作者: |
刘忠
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| 论文出处: |
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| 刊物名称: |
Journal of Material Chemistry A
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| 年: |
2013
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| 卷: |
1 |
| 期: |
9 |
| 页: |
3040-3046 |
| 联系作者: |
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| 收录类别: |
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| 影响因子: |
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| 摘要: |
Hexagonal a-Fe2O3 nanorods with high-index facets exposed were synthesized using a double ligandassisted hydrothermal method (involving PO43- and
formamide). The growth process of the synthesized particles obviously proceeded by two stages: (i) formation of capsule-shaped a-Fe2O3 nanoparticles
along [001] directions and (ii) preferential grow along [112] and/or its equivalent directions to form hexagonal nanorods. The occurrence of this process can be attributed to the stepwise effect of PO43 and formamide. First, the shape of the capsule-shaped a-Fe2O3 is mainly regulated by the adsorption of PO43- on those facets parallel to the c-axis of a-Fe2O3 during the nanocrystal growth because of the special double coordinated surface hydroxyl on (001) facets, and then the hexagonal structure should
result from the preferential growth along [112] and/or its equivalent directions due to the weak adsorption of formamide in the Ostwald ripening process. The as-prepared a-Fe2O3 exhibits an excellent electrochemical sensing capability towards H2O2 due to the exposed high-index facets and more active
sites of low-coordinated atoms that are located on the edges. |
| 英文摘要: |
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