Visible light to switch-on desorption from goethite
Source abstract
Abstract
Switching adsorption-desorption by visible light could provide the possibility for a wide range of applications that require controlled release-on-demand. Here, we demonstrate a visible-light controlled desorption behavior in aqueous suspensions for the first time. We observed cationic dye adsorption on amphoteric goethite α-FeOOH in the dark and release during visible light exposure at a pH value slightly over the isoelectric point of goethite. During this process, the dye does not degrade. Desorption is triggered by local heating due to light absorption in narrow band gap goethite, α-FeOOH.
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Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Solar-Powered Water Purification Methods · Iron oxide chemistry and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Biomaterials Research Laboratory
Institute of Inorganic Chemistry
Riga Technical University
Riga
Latvia
Institute of Physics
University of Tartu
50411 Tartu
Estonia
Department of Inorganic and Analytical Chemistry
University of Geneva
1205 Geneva
Switzerland
Research Laboratory of Functional Materials Technologies
Funding
European Regional Development Fund · Eesti Teadusagentuur · Université de Genève · Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung · Helmholtz-Zentrum Berlin für Materialien und Energie
References (17)
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