Conductometric acetone vapor sensor based on the use of gold-doped three-dimensional hierarchical porous zinc oxide microspheres

被引：10

作者：

Xu, Shengrui ^{[1
,2
]}

Zhang, Haibing ^{[1
]}

Qi, Lan ^{[1
]}

Xiao, Li ^{[2
]}

机构：

[1] Henan Normal Univ, Sch Chem & Chem Engn, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Peoples R China

[2] Henan Normal Univ, Sch Environm, Key Lab Yellow River & Huai River Water Environm, Henan Key Lab Environm Pollut Control,Minist Educ, Xinxiang 453007, Peoples R China

来源：

MICROCHIMICA ACTA | 2019年 / 186卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Gold-doped zinc oxide; Hydrothermal method; Volatile organic compounds; Acetone vapor; Nanoprobe; Rapid response; Selectivity; Sub-ppm detection; Type-I diabetes; Diagnosis; GAS-SENSING PROPERTIES; AU NANOPARTICLES; NANOSTRUCTURES; PERFORMANCE;

D O I：

10.1007/s00604-019-3457-y

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A versatile nanoprobe for acetone vapor was designed and fabricated. It is based on the use of gold-doped three-dimensional (3D) hierarchical porous zinc oxide microspheres (Au/ZnO HPMSs). The nanoprobe was synthesized by annealing zinc hydroxide carbonate precursor (obtained by a hydrothermal method) doped with gold nanoparticles. The resulting products possess a 3D open framework structure built of 2D porous nanosheets with a nanoporous wormhole-like shape. The microspheres doped with 0.5mol% gold display a good selectivity towards acetone. The conductometric nanoprobe, typically operated at a voltage of 5V, can detect sub-ppm levels of acetone, and the detection limit is as low as 0.2ppm. The response (at a level of up to 100ppm of acetone at 325 degrees C) was high (741.9), and the response and recovery time are 6 and 3s, respectively. This superior performance is ascribed (a) to the hierarchical porous ZnO architecture that warrants a large surface area; and (b) to the presence of gold nanoparticles that facilitate the chemisorption and dissociation of gas molecules.

引用

页数：8

共 31 条

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