Cu-MOF-808 as a Sensing Material for Gaseous Hydrogen Sulfide

authored by

Nele Marquardt, Melina Dahlke, Andreas Schaate

Abstract

The selective detection of hydrogen sulfide (H2 S) is an important task because of its potentially hazardous effects not only on the environment but also on human health. Here, we present the zirconium-based MOF-808, which was modified with copper salts, as a colorimetric sensor material for the visible, reversible and sensitive H2 S detection at room temperature. The copper cations, which are incorporated in the oxidation state +II, are installed at the inorganic building units (IBUs) of the framework so that they are accessible for interactions with H2 S. The activated copper doped MOF-808 powder shows significant and fast color change in the presence of H2 S, which can be detected by UV-vis spectroscopy. Moreover, the detection process is reversible by heating the material to 120 °C under ambient conditions leading to its decolorization. The detection performance of the material was studied by in situ UV-vis measurements in a reaction chamber. The material was able to respond to 100 ppm H2 S in several cycles of exposure and heating to 120 °C under moist air conditions in a defined wavelength range. This reversibility is very uncommon for copper-based H2 S sensing reactions and highlights the potential of MOFs as selective sensing materials.

Organisation(s)

Institute of Inorganic Chemistry
Hannover School for Nanotechnology
Inorganic Molecular and Materials Chemistry group
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines

Type

Article

Journal

CHEMPLUSCHEM

Volume

88

No. of pages

8

ISSN

2192-6506

Publication date

03.04.2023

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Chemistry(all)

Sustainable Development Goals

SDG 3 - Good Health and Well-being

Electronic version(s)

https://doi.org/10.1002/cplu.202300109 (Access: Open)