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Electrochemical degradation of dye on TiO2 nanotube array constructed anode.
Chemosphere. 2019 Nov; 235:1189-1196.C

Abstract

A high oxygen evolution potential (2.6V) and conductivity of Ti/TiO2 NTs/Ta2O5-PbO2 anode was fabricated by mixed metal oxide. A well-aligned TiO2 nanotubes was successfully prepared by using 1-butyl-3-methylimidazolium tetrafluoroborate as the electrolyte. The surface structure of anodes were characterized by scanning electron microscope, X-ray diffraction and energy dispersive X-ray spectroscopy. During the electrochemical degradation experiments, the effects of different anodes, current density, initial pH value and concentration were discussed. The results showed that co-doped Ta2O5 coating is an effective method to improve the surface morphology and the electrochemical characterization of Ti/TiO2 NTs/PbO2. At the initial pH value of 3 and current density of 12 mA cm-2, the removal rates of Acid Orange 7 and total organic carbon with Ti/TiO2 NTs/Ta2O5-PbO2 anode were almost 100% and 98.3%. Comparing with Ti/PbO2 anode at the same charge consumption (3 A h L-1), the instantaneous current efficiency of the Ti/TiO2 NTs/Ta2O5-PbO2 anode and Ti/TiO2 NTs/PbO2 anode increased by 40.0% and 27.1%, respectively. The highest rate of k.OH on Ti/TiO2 NTs/Ta2O5-PbO2 anode was 12.4 μmol (L min)-1. The organic dyes are oxidized into CO2 and H2O by .OH radical. The reaction process and mechanism during the electrochemical degradation were discussed.

Authors+Show Affiliations

College of Chemistry & Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.Xinjiang Energy Co., LTD, Wulumuqi, 830000, People's Republic of China.Xinjiang Energy Co., LTD, Wulumuqi, 830000, People's Republic of China.College of Chemistry & Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China. Electronic address: prc@whu.edu.cn.College of Chemistry & Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China. Electronic address: yuping@whu.edu.cn.College of Chemistry & Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31561310

Citation

Gui, Lin, et al. "Electrochemical Degradation of Dye On TiO2 Nanotube Array Constructed Anode." Chemosphere, vol. 235, 2019, pp. 1189-1196.
Gui L, Peng J, Li P, et al. Electrochemical degradation of dye on TiO2 nanotube array constructed anode. Chemosphere. 2019;235:1189-1196.
Gui, L., Peng, J., Li, P., Peng, R., Yu, P., & Luo, Y. (2019). Electrochemical degradation of dye on TiO2 nanotube array constructed anode. Chemosphere, 235, 1189-1196. https://doi.org/10.1016/j.chemosphere.2019.06.170
Gui L, et al. Electrochemical Degradation of Dye On TiO2 Nanotube Array Constructed Anode. Chemosphere. 2019;235:1189-1196. PubMed PMID: 31561310.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical degradation of dye on TiO2 nanotube array constructed anode. AU - Gui,Lin, AU - Peng,Jianghua, AU - Li,Peng, AU - Peng,Ruichao, AU - Yu,Ping, AU - Luo,Yunbai, Y1 - 2019/06/23/ PY - 2019/03/21/received PY - 2019/06/21/revised PY - 2019/06/22/accepted PY - 2019/9/29/entrez PY - 2019/9/29/pubmed PY - 2019/10/29/medline KW - Dye degradation KW - Electron paramagnetic resonance KW - Hydroxyl radical KW - TiO(2) nanotubes SP - 1189 EP - 1196 JF - Chemosphere JO - Chemosphere VL - 235 N2 - A high oxygen evolution potential (2.6V) and conductivity of Ti/TiO2 NTs/Ta2O5-PbO2 anode was fabricated by mixed metal oxide. A well-aligned TiO2 nanotubes was successfully prepared by using 1-butyl-3-methylimidazolium tetrafluoroborate as the electrolyte. The surface structure of anodes were characterized by scanning electron microscope, X-ray diffraction and energy dispersive X-ray spectroscopy. During the electrochemical degradation experiments, the effects of different anodes, current density, initial pH value and concentration were discussed. The results showed that co-doped Ta2O5 coating is an effective method to improve the surface morphology and the electrochemical characterization of Ti/TiO2 NTs/PbO2. At the initial pH value of 3 and current density of 12 mA cm-2, the removal rates of Acid Orange 7 and total organic carbon with Ti/TiO2 NTs/Ta2O5-PbO2 anode were almost 100% and 98.3%. Comparing with Ti/PbO2 anode at the same charge consumption (3 A h L-1), the instantaneous current efficiency of the Ti/TiO2 NTs/Ta2O5-PbO2 anode and Ti/TiO2 NTs/PbO2 anode increased by 40.0% and 27.1%, respectively. The highest rate of k.OH on Ti/TiO2 NTs/Ta2O5-PbO2 anode was 12.4 μmol (L min)-1. The organic dyes are oxidized into CO2 and H2O by .OH radical. The reaction process and mechanism during the electrochemical degradation were discussed. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31561310/Electrochemical_degradation_of_dye_on_TiO2_nanotube_array_constructed_anode_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)31411-0 DB - PRIME DP - Unbound Medicine ER -