Ag@ZnO yolk-shell nanospheres for high-performance ethanol sensor

被引：7
|
作者：
Yao, Yao [1 ]
Liao, Gangli [1 ]
Dong, Wenbin [1 ]
Cui, Huina [1 ]
Zhao, Zhen [1 ]
Han, Xinning [1 ]
机构：
[1] Ningxia Normal Univ, Coll Chem & Chem Engn, Guyuan 756000, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2022年 / 791卷
关键词：
Ag@ZnO; Yolk-shell; Gas sensor; Ethanol; HOLLOW NANOSPHERE; RAMAN-SCATTERING; NANOPARTICLES; HETEROSTRUCTURES; MICROSPHERES; DEGRADATION; SPHERES; DESIGN;
D O I：
10.1016/j.cplett.2022.139391
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ag@ZnO yolk-shell nanospheres (Ag@ZnO YSNSs) are fabricated via a simple sonochemical method for chemical sensor application. It is found that the Ag@ZnO YSNSs exhibits remarkable sensitivity and ultra-high response towards ethanol vapor. Compared with the pristine ZnO hollow nanosphere (ZnO HNSs), Ag@ZnO YSNSs based gas sensor reduced the optimum working temperature from 420 to 320 ?, shorten the response/recovery time from 55/18 to 23/15 s, optimized the detection limit from 5.20 to 0.88 ppm, and enhanced the sensor response from 66 to 250. The unique yolk-void-shell nanostructure, the catalytic effect of noble metal Ag and abundant oxygen vacancies in Ag@ZnO YSNSs are responsible for that improvement.
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页数：7
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