In:
Chemistry – A European Journal, Wiley, Vol. 27, No. 35 ( 2021-06-21), p. 9011-9021
Abstract:
The functionalization of photocatalytic metal oxide nanoparticles of TiO 2 , ZnO, WO 3 and CuO with amine‐terminated (oleylamine) and thiol‐terminated (dodecane‐1‐thiol) alkyl‐chain ligands was studied under ambient conditions. A high selectivity was observed in the binding specificity of a ligand towards nanoparticles of these different oxides. It was observed that oleylamine binds stably to only TiO 2 and WO 3 , whereas dodecane‐1‐thiol binds stably only to ZnO and CuO. Similarly, polar‐to‐nonpolar solvent phase transfer of TiO 2 and WO 3 nanoparticles could be achieved by using oleylamine, but not dodecane‐1‐thiol, whereas the opposite holds for ZnO and CuO. The surface chemistry of ligand‐functionalized nanoparticles was probed by attenuated total reflectance (ATR)‐FTIR spectroscopy, which enabled the occupation of the ligands at the active sites to be elucidated. The photostability of the ligands on the nanoparticle surface was determined by the photocatalytic self‐cleaning properties of the material. Although TiO 2 and WO 3 degrade the ligands within 24 h under both UV and visible light, ligands on ZnO and CuO remain unaffected. The gathered insights are also highly relevant from an application point of view. As an example, because the ligand‐functionalized nanoparticles are hydrophobic in nature, they can be self‐assembled at the air‐water interface to give nanoparticle films with demonstrated photocatalytic as well as anti‐fogging properties.
Type of Medium:
Online Resource
ISSN:
0947-6539
,
1521-3765
DOI:
10.1002/chem.202100029
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
1478547-X
Permalink