Highly efficient polypyrrole sensitized TiO2 nanotube films for photocathodic protection of Q235 carbon steel. (October 2016)

• Record Type: Journal Article
• Authors: Ren, Junfeng; Qian, Bei; Li, Jianzhong; Song, Zuwei; Hao, Long; Shi, Jinsheng
• Is Part Of: Corrosion science. Volume 111(2016)
• Page Start: 596
• Page End: 601
• Publication Date: 2016-10
• Subjects: A. Titanium -- A. Carbon steel -- A. Polymer -- B. Potentiostatic -- C. Electrodeposited films -- C. Cathodic protection; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2016.06.001
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: PPy/TNAs hybrid film is prepared by electrochemical method. The effect of electropolymerisation time on the performance of film is compared. PPy/TNAs show excellent photocathodic protection ability for Q235 carbon steel. PPy plays a role in photosensitization, electron pool and hetero-junction formation. Abstract: Polypyrrole (PPy) sensitized TiO2 nanotube arrays (PPy/TNAs) are fabricated via anodic oxidation and electropolymerisation method. The crystallinity, morphology, optical property and photocathodic protection performance of PPy/TNAs composites can be readily controlled by varying the electropolymerisation time. PPy acts as a photosensitizer and a "pool" to gather photoexcited electrons, and an appropriate quantity of PPy contributes to the photosensitization, heterojunction formation and electron pool effect. The PPy/TNAs film acquired at 15 min exhibits excellent visible-light response and favourable photocathodic protection for the coupled Q235 carbon steel under white-light irradiation.