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10.3390/ma12233856
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Article

Preparation and Photocathodic Protection Properties of ZnO/TiO2 Heterojunction Film Under Simulated Solar Light

by
Xiong Zhang
1,
Guanghui Chen
2,
Weihua Li
3 and
Dianwu Wu
1,*
1
School of Materials Science and Engineering, Tongji University, No. 4800 Caoan Road, Shanghai 201804, China
2
College of chemical engineering, Qingdao University of science & technology, No.53 Zhengzhou Road, Qingdao 266042, China
3
School of Chemical engineering and technology, Sun Yat-Sen University Zhuhai Campus, tangjiawan, Zhuhai 519082, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(23), 3856; https://doi.org/10.3390/ma12233856
Submission received: 12 October 2019 / Revised: 15 November 2019 / Accepted: 20 November 2019 / Published: 22 November 2019
(This article belongs to the Special Issue Self-Assembled Films for Improved Corrosion Resistance)
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Abstract

In this work, a novel double layer made of ZnO nanorod arrays and TiO2 nanorod arrays with anticorrosion function were successfully prepared on fluorine-doped tin oxide (FTO) substrate by a simple low-temperature solvothermal method. As compared with the pure TiO2 and pure ZnO film, the combination of the two films presented higher photocathodic protection performance for 316 stainless steel (316 SS) and Q235 carbon steel in 3.5 wt% NaCl solution. The composite film with ZnO nanoparticles layer between ZnO nanorod arrays and TiO2 nanorod arrays exhibited the best photocathodic performance, which lowered the open circuit potential (OCP) of 316 SS and Q235 to −991 mV, −1066 mV, respectively. The results demonstrated that the formation of the uniform heterojunction film and the small difference in band alignment played important roles in the promotion of photocathodic protection performance.
Keywords: ZnO; TiO2; heterojunction; photocathodic protection; corrosion protection ZnO; TiO2; heterojunction; photocathodic protection; corrosion protection
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MDPI and ACS Style

Zhang, X.; Chen, G.; Li, W.; Wu, D. Preparation and Photocathodic Protection Properties of ZnO/TiO2 Heterojunction Film Under Simulated Solar Light. Materials 2019, 12, 3856. https://doi.org/10.3390/ma12233856

AMA Style

Zhang X, Chen G, Li W, Wu D. Preparation and Photocathodic Protection Properties of ZnO/TiO2 Heterojunction Film Under Simulated Solar Light. Materials. 2019; 12(23):3856. https://doi.org/10.3390/ma12233856

Chicago/Turabian Style

Zhang, Xiong, Guanghui Chen, Weihua Li, and Dianwu Wu. 2019. "Preparation and Photocathodic Protection Properties of ZnO/TiO2 Heterojunction Film Under Simulated Solar Light" Materials 12, no. 23: 3856. https://doi.org/10.3390/ma12233856

APA Style

Zhang, X., Chen, G., Li, W., & Wu, D. (2019). Preparation and Photocathodic Protection Properties of ZnO/TiO2 Heterojunction Film Under Simulated Solar Light. Materials, 12(23), 3856. https://doi.org/10.3390/ma12233856

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