期刊
ADVANCED MATERIALS INTERFACES
卷 8, 期 15, 页码 -出版社
WILEY
DOI: 10.1002/admi.202100283
关键词
acetone gas sensor; coordinatively unsaturated metal site; copper oxide nanoparticle; crystal facet; metal-organic frameworks
资金
- New Energy and Industrial Technology Development Organization (NEDO) [JPNP19005]
The authors synthesized diamond- and square-type Cu-metal-organic frameworks (MOFs) and converted them to CuO nanostructures, with CuO-D showing higher gas sensitivity compared to CuO-S due to the presence of coordinatively unsaturated metal sites on the exposed (111) facet.
Herein, the authors successfully synthesize diamond- and square-type Cu-metal-organic frameworks (MOFs) and then convert them to highly porous CuO nanostructures with maintaining their morphology. Both the CuO-diamond (CuO-D) and CuO-square (CuO-S) gas sensors can detect a tiny concentration of acetone gas up to 50 ppb. However, the gas sensitivity depends on the morphology and the CuO-D exhibits a higher gas response (R-g/R-a: 3.3) for 1 ppm of acetone as compared with CuO-S sensors (R-g/R-a: 2.5). The mainly exposed crystal facet on the surface significantly affects the sensor performance. Especially, coordinatively unsaturated metal sites in an exposed facet can allow enhancing the sensitivity. The (111) facet is the main exposed facet of CuO-D and it includes Cu3-fold which is a coordinatively unsaturated metal site. These relatively unstable Cu3-fold sites are favorable to react with other molecules to stabilize themselves as compared with coordinatively saturated Cu4-fold. Thus, CuO-D demonstrates higher sensitivity as compared to CuO-S, which is the main reaction surface as (020) facet composed only of Cu4-fold.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据