Facile Synthesis of Hierarchical CuO Microspheres and their Gas Sensing Properties for NOx at Room Temperature

被引：9
|
作者：
Song, Wanzhen [1 ]
Wu, Hongyuan [1 ]
Wang, Jingchao [1 ]
Lin, Yufei [1 ]
Song, Jiabao [1 ]
Xie, Yu [2 ]
Li, Li [1 ,3 ]
Shi, Keying [1 ]
机构：
[1] Heilongjiang Univ, Key Lab Funct Inorgan Mat Chem, Minist Educ, Sch Chem & Mat Sci, Harbin 150080, Peoples R China
[2] Nanchang Hangkong Univ, Dept Chem Mat, Nanchang 330063, Peoples R China
[3] Heilongjiang Univ, Key Lab Chem Engn Proc & Technol High Efficiency, Sch Chem & Mat Sci, Harbin 150080, Peoples R China
来源：
AUSTRALIAN JOURNAL OF CHEMISTRY | 2015年 / 68卷 / 10期
基金：
中国国家自然科学基金;
关键词：
THIN-FILMS; ZNO NANOSTRUCTURES; OXIDE MICROSPHERES; GRAPHENE SHEETS; NANOWIRE ARRAYS; SENSOR; FLOWER; NANOPARTICLES; PERFORMANCE; MORPHOLOGY;
D O I：
10.1071/CH15126
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this research, hierarchical CuO microspheres have been successfully synthesised by a facile reflux method. Scanning electron microscopy results clearly revealed that the hierarchical CuO microspheres were composed of two-dimensional nanosheets. The morphology of the prepared products could be tailored by changing the precursor concentration. The CuO-2 sample shows a higher NOx gas sensing performance with a low detection limit of 0.97 ppm, high gas response of 64.93 %, and short response time of 5.33 s to 97.0 ppm NOx at room temperature. The CuO-2 sensor also presents good selectivity and stability. The significantly improved gas response was concluded to be related to the well aligned microstructures and the improved conductivity of the CuO-2 sample. The unique hierarchical structure allows effective and rapid gas diffusion towards the sensing surfaces. In addition, the sensing mechanism based on the hierarchical CuO microspheres is discussed.
引用
收藏
页码：1569 / 1576
页数：8
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