湿度
煅烧
材料科学
退火(玻璃)
氧气
纳米技术
空位缺陷
化学工程
复合材料
催化作用
化学
结晶学
热力学
物理
工程类
生物化学
有机化学
作者
Yu Hou,Chuanyu Guo,Xianfa Zhang,Xiaoli Cheng,Yingming Xu,Shan Gao,Li-Hua Huo
标识
DOI:10.1002/sstr.202100166
摘要
Improving sensitivity under low humidity is highly desirable for the applications of humidity sensors in robotics, intelligent prosthetics, and human–machine interfaces, etc. Herein, by using K 3 [Co(CN) 6 ] as a single‐source precursor, the Co 3 [Co(CN) 6 ] 2 microcubes were synthesized, which can keep the morphology in temperature range of 380–880 °C as annealed in air. Benefited from the ultrahigh structural stability of the Co 3 [Co(CN) 6 ] 2 , the oxygen vacancy in the derived Co 3 O 4 products can be controllably fabricated through altering calcination temperature. The oxygen vacancy‐abundant Co 3 O 4 products displayed significantly enhanced response under low humidity (0–6%RH), and thus were applied in scanning a series of water areas to map the humidity distribution. This work presents a promising strategy on rationally designing humidity sensing materials via oxygen defect engineering and provides more possibilities for the application of low‐cost humidity sensors in some emerging fields.
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