Covalent Organic Framework Decorated TiO2 Nanotube Arrays for Photoelectrochemical Cathodic Protection of Steel
By Wang, Chunli; Gao, Wei; Liu, Nazhen; Xin, Yu; Liu, Xinyu; Wang, Xiutong; Tian, Yong; Chen, Xuwei; Hou, Baorong
Published in Corrosion Science
Corrosion Science
2020
Abstract
For the first time, a covalent organic framework TpBD was grown in situ on TiO2 nanotube arrays (NTAs), and the performance of the composite was investigated for the application of photoelectrochemical (PEC) cathodic protection. The synthesized TpBD/TiO2 NTA composite exhibited enhanced PEC cathodic protection performance under visible light. Coupled with the TpBD/TiO2 NTA photoanode, the photoinduced potential drop values for 304 stainless steel and Q235 carbon steel in 3.5 wt% NaCl solution were 910 and 370 mV, respectively. It was proposed that the enhanced PEC performance was due to the formation of a Z-scheme heterojunction between TpBD and TiO2.