Visible Light to Switch-on Desorption from Goethite
Nanoscale
2019
Anna Šutka,
Martin Järvekülg,
Kārlis-Agris Gross,
Mati Kook,
Tanel Käämbre,
Meeri Visnapuu,
Gregor Trefalt,
Andris Šutka
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.
Atslēgas vārdi
goethite nanowires, adsorption, desorption, visible light
DOI
10.1039/C8NR09547G
Hipersaite
https://pubs.rsc.org/en/content/articlelanding/2019/nr/c8nr09547g#!divAbstract
Šutka, A., Järvekülg, M., Gross, K., Kook, M., Käämbre, T., Visnapuu, M., Trefalt, G., Šutka, A. Visible Light to Switch-on Desorption from Goethite. Nanoscale, 2019, Vol. 11, No. 9, 3794.-3798.lpp. ISSN 2040-3372. Pieejams: doi:10.1039/C8NR09547G
Publikācijas valoda
English (en)