화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.36, No.11, 1753-1766, November, 2019
DOI10.1007/s11814-019-0365-0  Export Citation
A short review on electrochemically self-doped TiO2 nanotube arrays: Synthesis and applications
Sung Pil Hong1, Seonghwan Kim1, Nayeong Kim1, Jeyong Yoon1, 2, †, and Choonsoo Kim3, †
  • 1School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 08826, Korea
  • 2Korea Environment Institute, 370 Sicheong-daero, Sejong-si 30147, Korea
  • 3Department of Environmental Engineering, Kongju National University, 1223-23, Cheonan-daero, Cheonan-si 31080, Korea
E-mail:,
Electrochemically self-doped TiO2 nanotube arrays (known as reduced TiO2 nanotube arrays, r-TiO2 NTAs) are currently drawing great attention as emerging and promising materials for energy and environmental applications as they exhibit highly enhanced electrochemical properties, such as good capacitive properties and electro- and photocatalytic activity when compared to pristine TiO2 NTAs. Such enhanced properties are attributed to the introduction of trivalent titanium (Ti(III)) as a self-dopant in the lattice of pristine TiO2 NTAs through simple electrochemical reduction. However, in spite of the great interest in, and potential of this material, there is no comprehensive review on the synthesis and applications of r-TiO2 NTAs. Therefore, in this review, we critically and briefly review r-TiO2 NTAs in terms of the electrochemical self-doping mechanism, their functional features, and various applications including photolysis, dyesensitized solar cells (DSSCs), biomedical coatings and drug delivery. In addition, to better understanding r-TiO2 NTAs, pristine TiO2 NTAs are briefly introduced. Furthermore, this review proposes future research directions with major challenges to be overcome for the successful development of r-TiO2 NTAs, such as to standardize matrices for performance evaluation, to confirm the organic degradation performance as anode, and to improve mechanical stability.
Keywords:TiO2 Nanotube Arrays (NTAs);Electrochemical Self-doping;Capacitive Property;Electrocatalytic Activity;Photocatalytic Activity
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