纳米纤维
丙酮
静电纺丝
材料科学
多孔性
化学工程
纳米颗粒
吸附
纳米技术
选择性
制作
聚合物
复合材料
有机化学
化学
催化作用
替代医学
工程类
医学
病理
作者
Zhicheng Cai,Sunghoon Park
标识
DOI:10.1016/j.jallcom.2022.165875
摘要
We report synthesis and characterization of Co3O4-decorated porous TiO2 nanofibers obtained through a facile electrospinning followed by a hydrothermal process. A morphological characterization confirmed that the diameter of the nanofiber was 250–300 nm. It was composed of subgrains, while its surface was decorated with Co3O4 nanoparticles with a diameter of 30–50 nm. The nanofiber had a porous body structure, which was conducive to the adsorption of acetone gas. The synthesized Co3O4-decorated porous TiO2 nanofibers were used as sensing materials to fabricate acetone gas sensors. Their response and recovery times were systematically analyzed with respect to the operation temperature and acetone gas concentration. The observed gas response, response time, and recovery time of the nanofiber-based gas sensor were 71.88, 122 s, and 351 s, respectively, for 100-ppm acetone gas at an optimized temperature of 250 °C. Therefore, the Co3O4-decorated porous TiO2 nanofibers could be a promising candidate for the fabrication of high-selectivity acetone gas sensors.
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