共 53 条
In2O3-SnO2 hybrid porous nanostructures delivering enhanced formaldehyde sensing performance
被引:57
作者:
Ge, Wenwen
[1
]
Chang, Yuhong
[1
]
Natarajan, Vinothkumar
[1
]
Feng, Zhenyu
[1
]
Zhan, Jinhua
[1
]
Ma, Xicheng
[1
]
机构:
[1] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Gas sensor;
SnO2;
In2O3;
Formaldehyde;
Hybrid nanostructures;
HOLLOW SNO2 NANOFIBERS;
GAS SENSORS;
HETERO-NANOFIBERS;
OXIDE;
METAL;
SENSITIVITY;
HETEROJUNCTIONS;
NANOPARTICLES;
FABRICATION;
DESIGN;
D O I:
10.1016/j.jallcom.2018.02.171
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:
Novel In2O3-SnO2 hybrid sensing nanostructures with porous nature were successfully prepared and characterized by various techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM). Gas sensing properties of the fabricated sensor based on the as-prepared In2O3-SnO2 hybrid nanostructures were systematically investigated and compared with those of pure SnO2. The hybrid nanostructures containing 3% In2O3 exhibit the highest response value of 30.7-100 ppm formaldehyde at 100 degrees C, which was 14 times higher than that of pure SnO2. Moreover, gas sensors based on the as-prepared In2O3-SnO2 hybrid nanostructures also exhibit high stability and good selectivity for formaldehyde. The enhanced sensing performances of formaldehyde were mainly attributed to the formation of n-n heterojunctions and the synergistic interaction between In2O3 and SnO2. (c) 2018 Elsevier B.V. All rights reserved.
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页码:36 / 44
页数:9
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