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.


Issue 26, 2020
Previous Article Next Article

Unraveling the enhancement mechanisms of H2S sensing on a SnO2 surface: an ab initio perspective

Author affiliations

Abstract

Accurate and effective sensing of H2S is one of the most complex and challenging tasks. Recent studies have demonstrated that the development of an Sb-doped SnO2 nanoribbon sensor can enhance the detection limit of H2S. To clarify the enhancement mechanism, various factors that regulate the sensing processes, such as the Sb-doped sites, surface oxygen defects and possible pre-adsorbed oxygen species, are considered in this study. Theoretical calculations reveal a thorough and extensive understanding of the gas-sensing mechanisms. Once the H2S gas interacted with the Sb-doped SnO2(110) surface, the molecule released electrons back to the surface, together with a decreased resistance level and strengthened detection signal. In addition, the dissociative adsorption of the O2 molecule also plays a significant role in the sensing processes. It is expected that the present work can provide effective guidance for improving the sensitivity of metal oxide surfaces and shed new light on the development of next generation gas-sensing materials.

Graphical abstract: Unraveling the enhancement mechanisms of H2S sensing on a SnO2 surface: an ab initio perspective

Back to tab navigation

Supplementary files

Article information


Submitted
06 Apr 2020
Accepted
18 Jun 2020
First published
19 Jun 2020

Phys. Chem. Chem. Phys., 2020,22, 15006-15012
Article type
Paper

Unraveling the enhancement mechanisms of H2S sensing on a SnO2 surface: an ab initio perspective

Y. Liu, C. Xu and F. L. Gu, Phys. Chem. Chem. Phys., 2020, 22, 15006
DOI: 10.1039/D0CP01853H

Social activity

Search articles by author

Spotlight

Advertisements