Scientific article
Open access

Visible light to switch-on desorption from goethite

Published inNanoscale, vol. 11, no. 9, p. 3794-3798
Publication date2019

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.

Citation (ISO format)
ŠUTKA, Anna et al. Visible light to switch-on desorption from goethite. In: Nanoscale, 2019, vol. 11, n° 9, p. 3794–3798. doi: 10.1039/C8NR09547G
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Article (Published version)
ISSN of the journal2040-3372

Technical informations

Creation03/08/2019 1:38:00 PM
First validation03/08/2019 1:38:00 PM
Update time03/15/2023 3:50:18 PM
Status update03/15/2023 3:50:18 PM
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