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Effect of Crystal Defect on Gas Sensing Properties of Co3O4 Nanoparticles.
ACS Sensors ( IF 8.2 ) Pub Date : 2020-05-21 , DOI: 10.1021/acssensors.0c00290 Pil Gyu Choi 1 , Teruaki Fuchigami 2 , Ken-Ichi Kakimoto 2, 3 , Yoshitake Masuda 1
ACS Sensors ( IF 8.2 ) Pub Date : 2020-05-21 , DOI: 10.1021/acssensors.0c00290 Pil Gyu Choi 1 , Teruaki Fuchigami 2 , Ken-Ichi Kakimoto 2, 3 , Yoshitake Masuda 1
Affiliation
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Crystal growth-controlled Co3O4 nanoparticles were prepared to examine gas sensing properties. A cube-like, an irregular shaped, and three kinds of raspberry-type structures were observed by morphology analysis. The raspberry-type structures have an expanded lattice volume with a large oxygen deficiency area, and the cube-like structure has a contracted lattice volume as compared to the irregular shaped structure. The raspberry-type structures exhibited a higher sensor signal response than the others. A relationship between sensor properties and crystal defect was investigated, and it was revealed that the gas selectivity to a high dipole moment value of a reducing gas molecule increased with increasing oxygen deficiency area of the Co3O4 nanoparticle. It was considered that the oxygen deficiency area acted as an important reaction site, which can be attributed to the selective reaction of the Co3O4 nanoparticle with gas molecules.
中文翻译：
晶体缺陷对Co3O4纳米颗粒气敏特性的影响。
制备晶体生长受控的Co 3 O 4纳米颗粒，以检查气体传感性能。通过形态分析观察到了立方体状，不规则形状和三种覆盆子型结构。覆盆子型结构具有增大的晶格体积和较大的缺氧面积，并且与不规则形状的结构相比，立方体状结构具有收缩的晶格体积。覆盆子型结构比其他结构表现出更高的传感器信号响应。研究了传感器性能与晶体缺陷之间的关系，结果表明，随着Co 3 O 4氧缺乏面积的增加，对还原性气体分子的高偶极矩值的气体选择性增加。纳米粒子。认为缺氧区域是重要的反应部位，这可以归因于Co 3 O 4纳米粒子与气体分子的选择性反应。
更新日期：2020-06-26
中文翻译：
晶体缺陷对Co3O4纳米颗粒气敏特性的影响。
制备晶体生长受控的Co 3 O 4纳米颗粒，以检查气体传感性能。通过形态分析观察到了立方体状，不规则形状和三种覆盆子型结构。覆盆子型结构具有增大的晶格体积和较大的缺氧面积，并且与不规则形状的结构相比，立方体状结构具有收缩的晶格体积。覆盆子型结构比其他结构表现出更高的传感器信号响应。研究了传感器性能与晶体缺陷之间的关系，结果表明，随着Co 3 O 4氧缺乏面积的增加，对还原性气体分子的高偶极矩值的气体选择性增加。纳米粒子。认为缺氧区域是重要的反应部位，这可以归因于Co 3 O 4纳米粒子与气体分子的选择性反应。
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