A fast response and recovery H2S gas sensor based on free-standing TiO2 nanotube array films prepared by one-step anodization method

被引：68

作者：

Tong, Xin ^{[1
]}

Shen, Wenhao ^{[1
]}

Chen, Xiaoquan ^{[1
]}

Corriou, Jean-Pierre ^{[2
]}

机构：

[1] South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China

[2] Lorraine Univ, ENSIC, Lab React & Genie Procedes, UMR CNRS 7274, 1,Rue Grandville BP 20451, F-54001 Nancy, France

来源：

CERAMICS INTERNATIONAL | 2017年 / 43卷 / 16期

基金：

美国国家科学基金会;

关键词：

TiO2 nanotube array film; Free-standing; One-step anodization; H2S gas sensor; ROOM-TEMPERATURE; SENSING PROPERTIES; DOPED TIO2; NANOPARTICLES; MEMBRANE; SNO2; SENSITIVITY; PERFORMANCE; MECHANISM; METAL;

D O I：

10.1016/j.ceramint.2017.07.165

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：

The free-standing TiO2 nanotube (TiNT) array film was firstly synthesized by a one-step anodization method. The characterization results with SEM, TEM, XRD and EDX indicated that the main compound on the TiNT array film was titania with anatase phase, and the average inner diameter of the nanotube was around 110 nm with a wall thickness of 16 nm and a layer thickness of 3.8 mu m. Subsequently, the TiNT-based gas sensor was fabricated and its sensing properties toward H2S were investigated. The results showed that, operating under the optimum temperature of 300 degrees C, the TiNT-based gas sensor not only had excellent reversibility, selectivity and stability, but also attained the response values 4.5-26.2 to the detected H2S gas at 1-50 ppm, and good linearity between the sensor response and H2S concentration could be observed. Meanwhile, the response and recovery time of the sensor to 50 ppm H2S gas were as low as 22 s and 6 s, respectively. In addition, the growth mechanism of the free-standing TiNT array film and the gas sensing mechanism of the TiNT-based gas sensor towards H2S were also given in the article. Lastly, the outstanding gas sensing properties and easy fabrication of the TiNT-based gas sensor presented the potential industrial applications in the future.

引用

页码：14200 / 14209

页数：10

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