PMID- 27169417
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20171128
LR  - 20171128
IS  - 1463-9084 (Electronic)
IS  - 1463-9076 (Linking)
VI  - 18
IP  - 21
DP  - 2016 Jun 7
TI  - Effect of doping level of colored TiO2 nanotube arrays fabricated by 
      electrochemical self-doping on electrochemical properties.
PG  - 14370-5
LID - 10.1039/c6cp01799a [doi]
AB  - Recently, two types of TiO2 nanotube arrays (NTAs) (blue- and black-colored TiO2 
      NTAs), which are easily fabricated by electrochemical self-doping, have gained 
      much attention due particularly to their enhanced capacitive and 
      oxidant-generating properties. These enhanced electrochemical properties mean 
      that they have potential as basic materials for energy and environmental 
      applications, such as in supercapacitors and anodes for water treatment. However, 
      the understanding of the effect of the doping level of these TiO2 NTAs on their 
      electrochemical properties is limited because there is no direct comparison or 
      relevant discussion of their respective electrochemical properties under the same 
      conditions, despite the similar surface characteristics of the TiO2 NTAs obtained 
      by comparable electrochemical doping. Therefore, the objective of this study was 
      to investigate the effect of the doping level of blue and black TiO2 NTAs on 
      their electrochemical properties, including the capacitive and oxidant-generating 
      properties. Although no significant difference in their surface properties was 
      found using SEM, XRD and XPS, the black TiO2 NTA revealed a slightly higher 
      doping level than the blue TiO2 NTA, which is caused by the order of the 
      electrochemical self-doping and annealing conditions. With the different doping 
      levels of the two TiO2 NTAs, the black TiO2 NTA showed a higher areal 
      capacitance, indicating good capacitive properties, and better service life in 
      oxidant-generation than that of the blue TiO2 NTA. The blue TiO2 NTA exhibited a 
      larger oxygen evolution overpotential and higher chlorine evolution efficiency 
      than that of the black TiO2 NTA. We report that the new knowledge on blue and 
      black TiO2 NTAs from this study can contribute to the further development of 
      supercapacitors and oxidant-generating anodes for water treatment.
FAU - Kim, Choonsoo
AU  - Kim C
AD  - School of Chemical and Biological Engineering, College of Engineering, Institute 
      of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, 
      Seoul 151-742, Republic of Korea. jeyong@snu.ac.kr.
FAU - Kim, Seonghwan
AU  - Kim S
FAU - Hong, Sung Pil
AU  - Hong SP
FAU - Lee, Jaehan
AU  - Lee J
FAU - Yoon, Jeyong
AU  - Yoon J
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20160512
PL  - England
TA  - Phys Chem Chem Phys
JT  - Physical chemistry chemical physics : PCCP
JID - 100888160
EDAT- 2016/05/14 06:00
MHDA- 2016/05/14 06:01
CRDT- 2016/05/13 06:00
PHST- 2016/05/13 06:00 [entrez]
PHST- 2016/05/14 06:00 [pubmed]
PHST- 2016/05/14 06:01 [medline]
AID - 10.1039/c6cp01799a [doi]
PST - ppublish
SO  - Phys Chem Chem Phys. 2016 Jun 7;18(21):14370-5. doi: 10.1039/c6cp01799a. Epub 
      2016 May 12.