Electrodeposition of an ultrathin TiO2 coating using a deep eutectic solvent based on choline chloride

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Nuno M. Pereira (Author) FEUP; Carlos M. Pereira (Author) FCUP; João P. Araújo (Author) FCUP; António Fernando Silva (Author) FCUP

Journal

Title: Thin Solid Films

Vol. 645

Pages: 391-398

ISSN: 0040-6090

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 7 Citations

Other information

Authenticus ID: P-00N-8R4

DOI: 10.1016/j.tsf.2017.11.005

Abstract (EN): An alternative route is proposed for direct electrodeposition of TiO2 films. The electrochemical behaviour of Ti (IV) species in the deep eutectic solvent formed between choline chloride (ChCl) and ethylene glycol (EG) was studied by chronoamperometry and cyclic voltammetry. It was discussed that during the cathodic scan soluble subvalent TiCl chi species were formed using the eutectic system 1ChCl:2EG. Using ethylenediamine or LiF as additives it was possible to obtain a titanium dioxide thin film in the orthorhombic variant named brookite. Chronoamperometric investigations revealed a nucleation mechanism involving the simultaneous presence of 2D instantaneous nucleation process including lattice incorporation and a 3D diffusion-limited nucleation and growth process.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8