Hollow ZnO@SnO2-Pt Core-Shell Nanofibers for Ethanol Sensing

被引：8
|
作者：
Song, Xiaoyan [1 ]
Zhao, Fangzheng [1 ]
Wang, Zhipeng [2 ]
Ge, Runbin [1 ]
Xing, Jinfeng [3 ]
机构：
[1] Tiangong Univ, Sch Mat Sci & Engn, Tianjin 300387, Peoples R China
[2] Tianjin Inst Metrol Supervis Testing, Tianjin 300192, Peoples R China
[3] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300350, Peoples R China
来源：
ACS APPLIED NANO MATERIALS | 2022年 / 5卷 / 05期
基金：
中国国家自然科学基金;
关键词：
tin oxide (SnO2); Pt; coaxial electrospinning; gas sensor; ethanol; METAL-OXIDE NANOSTRUCTURES; DIFFERENT WORK FUNCTION; GAS SENSOR; LOW-TEMPERATURE; HETEROSTRUCTURE NANOFIBERS; IN2O3; NANOFIBERS; PERFORMANCE; FABRICATION; NANOWIRES; NANOCRYSTALS;
D O I：
10.1021/acsanm.2c00686
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, ZnO@SnO2-Pt core-shell nanofibers with a hollow structure have been prepared by coaxial electrospinning and heat treatment. The core-shell and hollow structures of nanofibers were confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The Brunauer-Emmett-Teller (BET) specific surface area test shows that the specific surface area of ZnO@ SnO2-Pt core-shell nanofibers is larger than those of ZnO@SnO2 coreshell nanofibers and SnO2 nanofibers. The gas-sensing test result shows that the response to 100 ppm ethanol gas is 132.04 and the response time is 5 s at 200 degrees C for ZnO@SnO2-Pt core-shell nanofibers with 0.3 wt % Pt. Compared with those of ZnO@SnO2 core-shell nanofibers without Pt and pure SnO2 nanofibers, the optimum working temperature of ZnO@ SnO2-Pt core-shell nanofibers is reduced by 125 degrees C and the maximum response is increased by 70.9 and 367.7%. Furthermore, the gas-sensing mechanism is discussed in detail.
引用
收藏
页码：6637 / 6649
页数：13
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