The Photocatalytic Properties and Mechanistic Study of ZnO, Ag Multiphase Co-Composited TiO2 Nanotube Arrays Film Prepared by One-Step Anodization Method. Issue 7 (1st January 2018)

• Record Type: Journal Article
• Authors: Shang, Fanmin; Chen, Suiyuan; Liang, Jing; Liu, Changsheng
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 7(2018)
• Page Start: D258
• Page End: D265
• Publication Date: 2018-01-01
• Subjects: double phase composition -- one-step method -- ZnO-Ag-TNTs; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0251807jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : ZnO/Ag multi-phase composited TiO2 nanotube arrays (TiO2 TNAs) films were prepared on pure Ti substrate through one-step anodizing method using double pulse plating power supply. The deposition amount of Ag and ZnO were adjusted by changing the concentration of Zn(NO3 )2 ·6H2 O and AgNO3 and reverse voltage. The results showed that ZnO deposited in the wall of TiO2 NTAs dispersedly; sedimentary phase and dispersed phase are the two forms of deposited Ag in TiO2 NTAs. The bandgap narrowed 0.33 eV, and the recombination rate of photo-generated electron-hole pairs also decreased obviously due to the doping energy level synergistic effect of ZnO and the Surface Plasmon Resonance (SPR) effect of Ag. Furthermore, the sample with 1 mM ZnO+0.4 mM Ag and 5 V reverse voltage has the best photocatalytic properties, the degradation rate of Methylene blue (MB) reached 86% which improved 15% compared with undoped TiO2 NTAs.