Selective and Reversible Sensing of Low Concentration of Carbon Monoxide Gas Using Nb-Doped OMS-2 Nanofibers at Room Temperature

被引：7

作者：

Kumar, Robin ^{[1
]}

Jaiswal, Monica ^{[1
]}

Singh, Osheen ^{[1
]}

Gupta, Abhishek ^{[1
]}

Ansari, Mohammed Suhail ^{[1
]}

Mittal, Jagjiwan ^{[1
]}

机构：

[1] Amity Univ, Amity Inst Nanotechnol, Noida 201313, India

来源：

IEEE SENSORS JOURNAL | 2019年 / 19卷 / 17期

关键词：

Nb-OMS-2; thin film; carbon monoxide; sensor; room temperature; MOLECULAR-SIEVES OMS-2; SENSOR; OXIDATION;

D O I：

10.1109/JSEN.2019.2916485

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A reversible and selective resistive gas sensor using Nb-doped cryptomelane octahedral molecular sieves (Nb-OMS-2) nanofibers for room-temperature CO gas detection was developed. The electrical resistance of the Nb-OMS-2 nanofibers decreases on exposure to CO gas. The sensor displayed response of 22% for 2 ppm and 91% for 400 ppm of CO gas in air. The average detection and recovery time were similar to 15 s for 200 ppm of CO at room temperature. The substitution of Mn with Nb in the OMS-2 framework, the formation of Nb-O-Mn bridge, and the reaction of CO with bridge oxygen are proposed to be responsible for high sensitivity and selectivity for CO gas in air.

引用

页码：7201 / 7206

页数：6