期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 785, 期 -, 页码 382-390出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.01.207
关键词
Hierarchical microspheres; Porous micro/nanostructure; Zn2SnO4/SnO2; Sensitivity
资金
- National Natural Science Foundation of China [U1704255, U1404613]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [18HASTIT010, 17HASTIT029]
- Young Core Instructor Project of Colleges and Universities in Henan Province [2015GGJS-063, 2016GGJS-040]
- Foundation of Henan Scientific and Technology key project [182102310892]
- Education Department Natural Science Foundation of fund Henan province [16A150051]
This paper reports a facile hydrothermal route to synthesis porous Zn2SnO4/SnO2 (ZTO/SnO2) hierarchical microspheres by using chemical etching process with post heat-treatment. Hierarchical ZnSn(OH)(6) microspheres (ZHS-Ms, diameter of 0.4-0.6 mu m) assembled with solid nanoparticles (diameters of 30-80 nm) were firstly prepared via a solvothermal route and then obtained their hollow structure by etching with alkaline solution. The obtained ZHS-Ms that assembled by solid and hollow particles were employed as sacrificial templates for ZTO/SnO2-1 and ZTO/SnO2-2 after a proper annealing process, respectively. It was found that the specific surface area of ZTO/SnO2-2 (26.566 m(2)g (-1)) is higher than ZTO/ SnO2-1 (19.789 m(2)g(-1)) through the etching process. The as-prepared ZTO/SnO2-1 and ZTO/SnO2-2 composites acted as sensing materials for detecting TEA gas. Results demonstrate that the ZTO/SnO2-2 sensor exhibits remarkably higher sensitivity, and better selectivity to TEA vapor at 280 degrees C than the ZTO/SnO2-1 sensor. In addition, the wider range of response linearity and higher response-recovery speed are further realized on the ZTO/SnO2-2 sensor. The enhanced sensing behavior may be attributed to the higher specific surface area and heterojunction of SnO2 and Zn2SnO4. (C) 2019 Elsevier B.V. All rights reserved.
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