Highly Efficient CuInSe[sub.2] Sensitized TiO[sub.2] Nanotube Films for Photocathodic Protection of 316 Stainless Steel

CuInSe[sub.2] nanoparticles were successfully deposited on the surface of TiO[sub.2] nanotube arrays (NTAs) by a solvothermal method for the photocathodic protection (PCP) of metals. Compared with TiO[sub.2] NTAs, the CuInSe[sub.2]/TiO[sub.2] composites exhibited stronger visible light absorption an...

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Bibliographic Details
Published inCoatings (Basel) Vol. 12; no. 10
Main Authors Yang, Zhanyuan, Li, Hong, Cui, Xingqiang, Zhu, Jinke, Li, Yanhui, Zhang, Pengfei, Li, Junru
Format Journal Article
LanguageEnglish
Published MDPI AG 01.09.2022
Subjects
Corrosion
Nanotubes
Steel
Steel, Stainless
Massachusetts
China
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Summary:CuInSe[sub.2] nanoparticles were successfully deposited on the surface of TiO[sub.2] nanotube arrays (NTAs) by a solvothermal method for the photocathodic protection (PCP) of metals. Compared with TiO[sub.2] NTAs, the CuInSe[sub.2]/TiO[sub.2] composites exhibited stronger visible light absorption and higher photoelectric conversion efficiency. After 316 Stainless Steel (SS) was coupled with CuInSe[sub.2]/TiO[sub.2], the potential of 316 SS could drop to −0.90 V. The photocurrent density of CuInSe[sub.2]/TiO[sub.2] connected to 316 SS reached 140 μA cm[sup.−2], which was four times that of TiO[sub.2] NTAs. The composites exhibited a protective effect in the dark state for more than 8 h after 4 h of visible light illumination. The above could be attributed to increased visible light absorption, the extended lifetime of photogenerated electrons, and generation of oxygen vacancies.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings12101448