Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Enhanced gas sensor based on SiO2@mesoporous MCM-41 core-shell nanocomposites for SO2 visual detection

Abstract

A colorimetric sulfur dioxide (SO2) gas sensor based on a core-shell composite was developed. The composites was fabricated by a silicon dioxide core with a mesoporous MCM-41 shell (SiO2@MCM-41), and further loaded with the mixture of zinc chloride (ZnCl2), sodium nitroprusside (SNP) and hexamine as an SO2 indicator. The sensing properties of SiO2@MCM-41 toward SO2 were measured in solid powder, discs and gas detection tube (GDT), respectively. Each of these sensing configurations showed distinct color change from pale yellow to red, which indicates a good potential for SO2 naked-eye detection. The limit of detection (LOD) is 2 ppm for SiO2@MCM-41 discs, which exihibited high sensitivity to SO2. And the performance of GDT suggested a linear relationship between SO2 concentration and the response length of the red portions in the range of 100-1000 ppm. This work shows promising potential of SiO2@MCM-41 as an easy, effective and rapid response sensing material for SO2 in-situ detection.

Back to tab navigation

Supplementary files

Article information


Submitted
30 Mar 2020
Accepted
14 May 2020
First published
20 May 2020

Analyst, 2020, Accepted Manuscript
Article type
Paper

Enhanced gas sensor based on SiO2@mesoporous MCM-41 core-shell nanocomposites for SO2 visual detection

J. Yang, F. Cheng, Z. Zhu, J. Feng, M. Xue, Z. Meng and L. Qiu, Analyst, 2020, Accepted Manuscript , DOI: 10.1039/D0AN00621A

Social activity

Search articles by author

Spotlight

Advertisements