期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 274, 期 -, 页码 575-586出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.08.001
关键词
PPy/Zn2SnO4 nanocomposite; Hydrothermal; Chemical oxidative polymerization; Ammonia sensor
资金
- National Natural Science Foundation of China [51777215]
- Fundamental Research Funds for the Central Universities of China [18CX07010A]
- Science and Technology Development Plan Project of Qingdao [16-6-2-53-nsh]
- Open Fund of National Engineering Laboratory for Mobile Source Emission Control Technology [NELMS2017B03]
This paper demonstrates an ultra-highly sensitive ammonia gas sensor based on polypyrrole/zinc stannate (PPy/Zn2SnO4) nanocomposite. The PPy/Zn2SnO4 nanocomposite was synthesized by layer-by-layer alternative deposition of PPy nanospheres and Zn2SnO4 hollow spheres. The as-prepared sample was characterized by X-ray diffraction (XRD), FT-IR spectrums, scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray photoelectron spectroscopy (XPS) and transmission electron microscope (TEM). The gas-sensing properties of the PPy/Zn2SnO4 nanofilm were investigated upon exposure to ammonia gas. The result showed that the PPy/Zn2SnO4 nanofilm sensor exhibited lower detection limit, higher response, faster response/recovery time, outstanding repeatability toward NH3 gas, which was greatly superior to the pure PPy and Zn2SnO4 counterparts. Such dramatically enhancement of gas-sensing properties for PPy/Zn2SnO4 nanofilm is attributed to the deprotonation/protonation process of ammonia adsorption/desorption on PPy surface, special interactions at p-n heterojunction, and high surface area of PPy/Zn2SnO4 nanocomposite.
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