Synthesis, characterization, and comparative gas sensing properties of tin dioxide nanoflowers and porous nanospheres

被引：18

作者：

Le Thi Hoa ^{[1
]}

Nguyen Due Cuong ^{[1
,2
]}

Tran Thai Hoa ^{[1
]}

Dinh Quang Khieu ^{[1
]}

Bang Thai Long ^{[1
]}

Duong Tuan Quang ^{[3
]}

Nguyen Duc Hoa ^{[4
]}

Nguyen Van Hieu ^{[4
]}

机构：

[1] Hue Univ, Coll Sci, Hue City, Vietnam

[2] Hue Univ, Fac Hospitality & Tourism, Hue City, Vietnam

[3] Hue Univ, Coll Educ, Hue City, Vietnam

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

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 10期

关键词：

Semiconductor; Hierarchical SnO2 nanostructures; Chemical synthesis; Gas sensor; HIERARCHICAL SNO2 NANOSTRUCTURES; HYDROTHERMAL SYNTHESIS; SENSORS; MICROSPHERES; NANOWIRES;

D O I：

10.1016/j.ceramint.2015.08.003

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Self-assembly of lower nanostructures into 3D superstructures is extensively investigated because of their excellent physicochemical properties. In this study, the hierarchical SnO2 nanostructures were prepared via two simple hydrothermal methods. The SnO2 nanostructures were characterized by X-ray diffraction (XRD), surface area analyzer (using BET method), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The SEM, TEM results revealed that the hierarchical SnO2 flowers were assembled by numerous one-dimensional tetragonal prism nanorods and the sphere architectures were formed by numerous smaller particles. The gas sensing results demonstrated that the different SnO2 nanostructures have great effect on the gas sensing behavior. The nanoflowers exhibited higher sensitivities to ethanol than the nanospheres, whereas the typical responses of these sensors to H-2 and LPG indicated that the porous spheres demonstrated better sensing performance than the hierarchical flowers. This interesting phenomenon contributes to clearly understand about morphology-dependent gas sensing properties. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：14819 / 14825

页数：7

共 32 条

[1] A Facile and Green Approach for the Controlled Synthesis of Porous SnO2 Nanospheres: Application as an Efficient Photocatalyst and an Excellent Gas Sensing Material [J].