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| 论文编号: |
122214O120110088 |
| 第一作者所在部门: |
913组 |
| 中文论文题目: |
Shuttle-like ZnO nano/microrods: facile synthesis, optical characterization and high formaldehyde sensing properties
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| 英文论文题目: |
Shuttle-like ZnO nano/microrods: facile synthesis, optical characterization and high formaldehyde sensing properties
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| 论文题目英文: |
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| 作者: |
赵江红，朱珍平
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| 论文出处: |
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| 刊物名称: |
Applied Surface Science
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| 年: |
2011
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| 卷: |
258 |
| 期: |
2 |
| 页: |
711 |
| 联系作者: |
赵江红，朱珍平 |
| 收录类别: |
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| 影响因子: |
1.795
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| 摘要: |
Shuttle-like ZnO nano/microrods were successfully synthesized via a low temperature (80 °C), “green” (without any organic solvent or surfactant) and simple hydrothermal process in the solution of zinc chloride and ammonia water. X-ray diffraction and Raman spectroscopy indicated that the ZnO nano/microrods are a well-crystallized hexagonal wurtzite structure. Yet photoluminescence analysis showed that abundant intrinsic defects (52.97% electron donor defects and 45.49% electron acceptor defects) exist on the surface of ZnO crystals. Gas sensors based on the shuttle-like ZnO nano/microrods exhibited high sensitivity, rapid response-recovery and good selectivity to formaldehyde in the range of 10-1000 ppm at an optimum operating temperature of 400 oC. Through applying linear fitting to the plot of sensitivity versus formaldehyde concentration in logarithmic forms, the chemisorbed oxygen species on the ZnO surface were found to be O2- (highly active among O2, O2- and O- species). Notably, formaldehyde can be easily distinguished from acetaldehyde with a selectivity of about 3. The high formaldehyde sensitivity is mainly attributed to the synergistic effect of abundant electron donor defects (52.97%) and highly-active oxidants (surface adsorbed O2？ species) co-existed on the surfaces of ZnO. |
| 英文摘要: |
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