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
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
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页数:8
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