Optimization of Ag loaded TiO2 nanotube arrays for plasmonic photoelectrochemical water splitting

سال انتشار: 1398
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 315

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شناسه ملی سند علمی:

JR_IJHFC-6-2_003

تاریخ نمایه سازی: 5 شهریور 1399

چکیده مقاله:

In this paper we report on a notable improvement of the photoelectrochemical (PEC) properties of highly ordered Ag loaded TiO2 nanotube arrays (Ag/TNT). Electrochemical anodization and sequential chemical bath deposition with an optimum ratio of precursors were employed for the production of an Ag/TNT nanocomposite. X-ray diffraction analysis (XRD) and scanning electron microscopy SEM images indicate that the Ag nanoparticles were deposited completely on the surface of the pore wall of TiO2 nanotube arrays. The photoelectrochemical measurements, including LSV, chronoamperometry and EIS, indicate that the Ag/TNT sample with a ratio of 1 precursors exhibited the maximum photoelectrochemical efficiency with a photocurrent density of about 300 µA, which is at least 3 times greater than a pure TNT sample. PEC and EIS measurements show that because of the localized surface plasmon resonance (LSPR) effects of Ag nanoparticles, an effective separation of photogenerated electron-hole pairs occurs that led to a reduction of charge transfer resistance at the interface and enhanced the PEC properties of the Ag/TNT sample.

نویسندگان

soolmaz jamali

Nuclear Science and Technology Research Institute, Tehran, Iran

ahmad moshaii

Department of Physics, Tarbiat Modares University, Tehran, P.O. Box ۱۴۱۱۵-۱۷۵, Iran

kyana mohammadi

Department of Physics, Tarbiat Modares University, Tehran

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