التفاصيل البيبلوغرافية
| العنوان: |
Carbon quantum dots/Ag sensitized TiO2 nanotube film for applications in photocathodic protection. |
| المؤلفون: |
Guan, Zi-Chao1 (AUTHOR), Jin, Piao1 (AUTHOR), Liu, Qing1 (AUTHOR), Wang, Xia1 (AUTHOR), Chen, Li-Fang1 (AUTHOR), Xu, Hui1 (AUTHOR), Song, Guang-Ling1,2 (AUTHOR) glsong@xmu.edu.cn, Du, Rong-Gui1 (AUTHOR) rgdu@xmu.edu.cn |
| المصدر: |
Journal of Alloys & Compounds. Aug2019, Vol. 797, p912-921. 10p. |
| مصطلحات موضوعية: |
*NANOTUBES, *QUANTUM dots, *CORROSION potential, *VISIBLE spectra |
| مستخلص: |
In order to obtain a TiO 2 composite film with improved photoelectrochemical properties, a TiO 2 nanotube array (NTA) film was constructed on a Ti substrate via anodization, then Ag nanoparticles (NPs) and carbon quantum dots (CQDs) were successively deposited on the TiO 2 NTA film by pulse current deposition and hydrothermal treatment, respectively. After the sensitization by CQDs and Ag NPs, the light absorption of the TiO 2 composite film was extended to the visible region. Under white light irradiation, the photocurrent density of the composite film in a 0.5 M Na 2 SO 4 solution reached 110 μA cm−2, much higher than that (60 μA cm−2) of the single TiO 2 film. The CQDs/Ag/TiO 2 composite film as a photoanode showed an improved photocathodic protection effect, which made the potential of the coupled 403 stainless steel (403SS) in the 0.5 M NaCl solution drop by 400 mV relative to its corrosion potential. Image 1 • A carbon quantum dot and Ag nanoparticle modified TiO 2 nanotube film was fabricated. • Photoresponse of the CQDs/Ag/TiO 2 film was extended into the visible light region. • The CQDs/Ag/TiO 2 composite film showed an enhanced photoelectrochemical performance. • The CQDs/Ag/TiO 2 film provided effective photocathodic protection for 403SS. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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