Effect of Outer Voltage for Anodizing TiO2 Nanotube Array on Their Photo-Induced Cathodic Protection Properties for MetalReportar como inadecuado




Effect of Outer Voltage for Anodizing TiO2 Nanotube Array on Their Photo-Induced Cathodic Protection Properties for Metal - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

TiO2 nanotube array thin films were prepared by put Ti substrate into 0.5M NH4HF2+1M NH4H2PO4 aqueous solution via anodic oxidation method for 2h. The outer voltage used in this work is respectively 5V, 10V, 20V, 30V and 40V. The as anodized TiO2 nanotube thin film is annealed in furnace at 500℃ for 2h. The anatase TiO2 nanotube with different structure could be finally obtained. The variations of open circuit potential with time at light irradiation or darkness condition were investigated in this paper. The results show that the open circuit potential would decrease under light irradiation, and the decrease value was greatly affected by outer voltage for anodizing and could be reached to 0.355V with the outer voltage of 20V, its open circuit potential shifted from 0.065 V to -0.285V, which means they have good capability for cathodic protection for metals.

KEYWORDS

TiO2 nanotube; anodic oxidation; photo-induced protection for metal

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Autor: Hong-yi Li, Jin-shu Wang, Ke-lin Huang, Guo-song Sun

Fuente: http://www.scirp.org/



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