Constructing porous ZnO/SnO2 nanocomposites for the detection of methane at low operating temperature

被引：10
作者：
Han, Liuyang [1 ]
Zhang, Saisai [1 ]
Zhang, Bowen [1 ]
Zhang, Bo [1 ]
Hari, Bala [1 ]
Zhang, Zhanying [1 ]
机构：
[1] Henan Polytech Univ, Sch Mat Sci & Engn, Jiaozuo 454000, Henan, Peoples R China
来源：
JOURNAL OF POROUS MATERIALS | 2022年 / 29卷 / 01期
基金：
中国国家自然科学基金;
关键词：
ZnO; SnO2; Nanocomposites; Heterojunction; Methane; Sensors; GAS-SENSING PERFORMANCE; FACILE SYNTHESIS; SENSOR; OXIDE; NO2; HETEROJUNCTIONS; ALPHA-FE2O3; FABRICATION; NANOFIBERS; FILMS;
D O I：
10.1007/s10934-021-01162-5
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Aimed at detecting methane (CH4) gas at low operating temperature, porous ZnO/SnO2 nanocomposites were constructed through a simple two-step method. Pure SnO2 with a diameter of approximately 120 nm was first synthesized via a hydrothermal method, and then a smaller and looser ZnO/SnO2 composite structure was obtained by introducing the second component ZnO. The CH4 sensing test results showed that the ZnO/SnO2 composites exhibited lower optimum operating temperature (OOT) than that of pure SnO2. Besides, compared with pure SnO2, the ZnO/SnO2 composite based sensor present higher response to CH4, as well as good repeatability, stability and linearity in a certain range of gas concentration. The improved sensitivity can be mainly attributed to the synergistic effect of porous structure and heterojunction formed between ZnO and SnO2.
引用
收藏
页码：269 / 278
页数：10
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