丙酮
纳米棒
纳米片
材料科学
选择性
异质结
化学工程
纳米技术
化学气相沉积
退火(玻璃)
分析化学(期刊)
化学
催化作用
有机化学
光电子学
冶金
工程类
作者
Huimin Gong,Changhui Zhao,Gaoqiang Niu,Wei Zhang,Fei Wang
出处
期刊:Research
[AAAS00]
日期:2020-01-01
卷期号:2020
被引量:21
标识
DOI:10.34133/2020/2196063
摘要
Exhaled acetone is one of the representative biomarkers for the noninvasive diagnosis of type-1 diabetes. In this work, we have applied a facile two-step chemical bath deposition method for acetone sensors based on α -Fe 2 O 3 /SnO 2 hybrid nanoarrays (HNAs), where one-dimensional (1D) FeOOH nanorods are in situ grown on the prefabricated 2D SnO 2 nanosheets for on-chip construction of 1D/2D HNAs. After annealing in air, ultrafine α -Fe 2 O 3 nanorods are homogenously distributed on the surface of SnO 2 nanosheet arrays (NSAs). Gas sensing results show that the α -Fe 2 O 3 /SnO 2 HNAs exhibit a greatly enhanced response to acetone (3.25 at 0.4 ppm) at a sub-ppm level compared with those based on pure SnO 2 NSAs (1.16 at 0.4 ppm) and pure α -Fe 2 O 3 nanorods (1.03 at 0.4 ppm), at an operating temperature of 340°C. The enhanced acetone sensing performance may be attributed to the formation of α -Fe 2 O 3 –SnO 2 n-n heterostructure with 1D/2D hybrid architectures. Moreover, the α -Fe 2 O 3 /SnO 2 HNAs also possess good reproducibility and selectivity toward acetone vapor, suggesting its potential application in breath acetone analysis.
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