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Investigation of photoelectrochemical properties of TiO 2 nanotube arrays prepared by anodization method
Author(s) -
Van Anh Nguyen Thi,
Xuan Mai Thi,
Binh Phan Thi,
Thuy Mai Thi Thanh
Publication year - 2020
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.201900147
Subject(s) - anodizing , materials science , photocurrent , calcination , nanotube , chemical engineering , electrolyte , ethylene glycol , foil method , nanotechnology , optoelectronics , composite material , electrode , chemistry , organic chemistry , catalysis , carbon nanotube , aluminium , engineering
Abstract TiO 2 nanotube arrays were prepared successfully by anodization of Ti foil in electrolyte containing 0.25 % NH 4 F, 5 % H 2 O and 94.75 % ethylene glycol and subsequently calcination at various temperatures from 300 to 600 o C in air. The crystalline structure and surface morphology of samples were determined by X‐ray diffraction and SEM images, respectively. The effect of calcination temperature, anodization time and voltage on the photoelectrochemical property of TiO 2 nanotube arrays had been investigated. Based on the obtained results, the highest photocurrent density of 5.29 mA/cm 2 was found for TiO 2 nanotube arrays synthesized under conditions such as anodization time of 2 hours, anodization voltage of 40 V and calcinated at 500 o C.