Facile synthesis of SnO2-ZnO core-shell nanowires for enhanced ethanol-sensing performance

被引：53

作者：

Dang Thi Thanh Le ^{[1
]}

Do Dang Trung ^{[1
]}

Nguyen Duc Chinh ^{[1
]}

Bui Thi Thanh Binh ^{[1
,2
]}

Hoang Si Hong ^{[3
]}

Nguyen Van Duy ^{[1
]}

Nguyen Duc Hoa ^{[1
]}

Nguyen Van Hieu ^{[1
]}

机构：

[1] Hanoi Univ Sci & Technol, Int Training Inst Mat Sci, Hanoi, Vietnam

[2] Hanoi Univ Sci & Technol, Sch Chem Engn, Hanoi, Vietnam

[3] Hanoi Univ Sci & Technol, Sch Elect Engn, Hanoi, Vietnam

来源：

CURRENT APPLIED PHYSICS | 2013年 / 13卷 / 08期

关键词：

SnO2-ZnO; Grainy core-shell; Nanowire; Ethanol sensor; LOW-TEMPERATURE PHOTOLUMINESCENCE; SELECTIVE DETECTION;

D O I：

10.1016/j.cap.2013.06.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The design of core-shell heteronanostructures is powerful tool to control both the gas selectivity and the sensitivity due to their hybrid properties. In this work, the SnO2-ZnO core-shell nanowires (NWs) were fabricated via two-step process comprising the thermal evaporation of the single crystalline SnO2 NWs core and the spray-coating of the grainy polycrystalline ZnO shell for enhanced ethanol sensing performance. The as-obtained products were investigated by X-ray diffraction, scanning electron microscopy, and photoluminescence. The ethanol gas-sensing properties of pristine SnO2 and ZnO-SnO2 core-shell NW sensors were studied and compared. The gas response to 500 ppm ethanol of the core-shell NW sensor increased to 33.84, which was 12.5-fold higher than that of the pristine SnO2 NW sensor. The selectivity of the core-shell NW sensor also improved. The response to 100 ppm ethanol was about 14.1, whereas the response to 100 ppm liquefied petroleum gas, NH3, H-2, and CO was smaller, and ranged from 2.5 to 5.3. This indicates that the core-shell heterostructures have great potential for use as gas sensing materials. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：1637 / 1642

页数：6

共 40 条

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