Gas-sensing property of a nitrogen-doped zinc oxide fabricated by combustion synthesis
Gas-sensing property of a nitrogen-doped zinc oxide fabricated by combustion synthesis
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DOI：
10.1016/j.snb.2013.04.052
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发表时间：
2013-07
影响因子：
8.4
通讯作者：
W. Wen;Jin-Ming Wu;Yude Wang
中科院分区：
文献类型：
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作者：
W. Wen;Jin-Ming Wu;Yude Wang
在影响ZnO气敏性能的各种因素中，晶体缺陷引起的关注较少。在这封信中，氮掺杂的ZnO粉末的气敏性能进行了详细的研究相比，无氮的二维多孔ZnO薄片，已被报道具有独特的形态有利于气敏性能。采用溶液燃烧法在瞬间制备了几百纳米的氮掺杂ZnO粉体。通过元素分析确定N/Zn原子比为0.04。当与无氮的多孔ZnO薄片相比时，氮掺杂的ZnO颗粒在ZnO基质中具有更多的缺氧物种，并且反过来表现出显着改善的气敏性能，用于检测乙醇和丙酮。因此，从氮掺杂所产生的晶体缺陷被认为是更有效地提高气敏性能的ZnO相比，其他努力，以控制颗粒尺寸，表面积和颗粒形态。
Among the various factors affecting the gas-sensing performance of ZnO, crystal defects have attracted less attention. In this letter, the gas-sensing property of a nitrogen doped ZnO powder was studied in detail in comparison with a nitrogen-free two-dimensional porous ZnO flake, which has been reported to possess a unique morphology favoring the gas-sensing performance. The nitrogen doped ZnO powders, which are several hundred nanometers in size, were fabricated in a flash by a solution combustion approach. The N/Zn atomic ratio was determined to be 0.04 by an elemental analysis. When compared with the nitrogen-free porous ZnO flakes, the nitrogen doped ZnO particles possessed more oxygen deficient species within the matrix of ZnO, and in turn exhibited a significantly improved gas-sensing property for detecting ethanol and acetone. The crystal defects arising from the nitrogen doping are thus argued to be more effective to improve the gas-sensing property of ZnO when compared with other efforts to control the particle size, surface area and the particulate morphology.