Affordable Access

deepdyve-link
Publisher Website

An enhanced gas sensor based on [email protected] MCM-41 core-shell nanocomposites for SO2 visual detection.

Authors
  • Yang, Ji1
  • Cheng, Fuqiang
  • Zhu, Zuogang
  • Feng, Jinsheng
  • Xue, Min
  • Meng, Zihui
  • Qiu, Lili
  • 1 School of Chemistry & Chemical Engineering, Beijing Institute of Technology, Beijing 100081, PR China. [email protected] , (China)
Type
Published Article
Journal
The Analyst
Publisher
The Royal Society of Chemistry
Publication Date
Jun 21, 2020
Volume
145
Issue
12
Pages
4352–4357
Identifiers
DOI: 10.1039/d0an00621a
PMID: 32501460
Source
Medline
Language
English
License
Unknown

Abstract

A colorimetric sulfur dioxide (SO2) gas sensor based on a core-shell composite was developed. The composite was fabricated with a silicon dioxide core and a mesoporous MCM-41 shell ([email protected]), and further loaded with a mixture of zinc chloride (ZnCl2), sodium nitroprusside (SNP) and hexamine as an SO2 indicator. The sensing properties of [email protected] toward SO2 were measured in solid powder, discs and a gas detection tube (GDT), respectively. Each of these sensing configurations showed a distinct color change from pale yellow to red, which indicates good potential for naked-eye detection of SO2. The limit of detection (LOD) is 2 ppm for [email protected] discs, which indicates high sensitivity to SO2. The performance of GDT suggested a linear relationship between the SO2 concentration and the response length of the red portions in a range of 100-1000 ppm. This work shows promising potential of [email protected] as an easy, effective and rapid response sensing material for the in situ detection of SO2.

Report this publication

Statistics

Seen <100 times