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Photoelectrochemical characterization of a robust TiO2/BDD heterojunction electrode for sensing application in aqueous solutions.
Langmuir. 2010 Apr 20; 26(8):6033-40.L

Abstract

Titanium dioxide (TiO(2)) and boron-doped diamond (BDD) are two of the most popular functional materials in recent years. In this work, TiO(2) nanoparticles were immobilized onto the BDD electrodes by a dip-coating technique. Continuous and uniform mixed-phase (anatase and rutile) and pure-anatase TiO(2)/BDD electrodes were obtained after calcination processes at 700 and 450 degrees C, respectively. The particle sizes of both types of TiO(2) film range from 20 to 30 nm. In comparison with a TiO(2)/indium tin oxide (ITO) electrode, the TiO(2)/BDD electrode demonstrates a higher photoelectrocatalytic activity toward the oxidation of organic compounds, such as glucose and potassium hydrogen phthalate. Among all the tested TiO(2) electrodes, the mixed-phase TiO(2)/BDD electrode demonstrated the highest photoelectrocatalytic activity, which can be attributed to the formation of the p-n heterojunction between TiO(2) and BDD. The electrode was subsequently used to detect a wide spectrum of organic compounds in aqueous solution using a steady-state current method. An excellent linear relationship between the steady-state photocurrents and equivalent organic concentrations was attained. The steady-state oxidation photocurrents of the mixed-phase TiO(2)/BDD electrode were insensitive to pH in the range of pH 2-10. Furthermore, the electrodes exhibited excellent robustness under strong acidic conditions that the TiO(2)/ITO electrodes cannot stand. These characteristics bestow the mixed-phase TiO(2)/BDD electrode to be a versatile material for the sensing of organic compounds.

Authors+Show Affiliations

Griffith School of Environment Gold Coast Campus, Griffith University QLD 4222, Australia.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20030335

Citation

Han, Yanhe, et al. "Photoelectrochemical Characterization of a Robust TiO2/BDD Heterojunction Electrode for Sensing Application in Aqueous Solutions." Langmuir : the ACS Journal of Surfaces and Colloids, vol. 26, no. 8, 2010, pp. 6033-40.
Han Y, Zhang S, Zhao H, et al. Photoelectrochemical characterization of a robust TiO2/BDD heterojunction electrode for sensing application in aqueous solutions. Langmuir. 2010;26(8):6033-40.
Han, Y., Zhang, S., Zhao, H., Wen, W., Zhang, H., Wang, H., & Peng, F. (2010). Photoelectrochemical characterization of a robust TiO2/BDD heterojunction electrode for sensing application in aqueous solutions. Langmuir : the ACS Journal of Surfaces and Colloids, 26(8), 6033-40. https://doi.org/10.1021/la903706e
Han Y, et al. Photoelectrochemical Characterization of a Robust TiO2/BDD Heterojunction Electrode for Sensing Application in Aqueous Solutions. Langmuir. 2010 Apr 20;26(8):6033-40. PubMed PMID: 20030335.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photoelectrochemical characterization of a robust TiO2/BDD heterojunction electrode for sensing application in aqueous solutions. AU - Han,Yanhe, AU - Zhang,Shanqing, AU - Zhao,Huijun, AU - Wen,William, AU - Zhang,Haimin, AU - Wang,Hongjuan, AU - Peng,Feng, PY - 2009/12/25/entrez PY - 2009/12/25/pubmed PY - 2010/7/2/medline SP - 6033 EP - 40 JF - Langmuir : the ACS journal of surfaces and colloids JO - Langmuir VL - 26 IS - 8 N2 - Titanium dioxide (TiO(2)) and boron-doped diamond (BDD) are two of the most popular functional materials in recent years. In this work, TiO(2) nanoparticles were immobilized onto the BDD electrodes by a dip-coating technique. Continuous and uniform mixed-phase (anatase and rutile) and pure-anatase TiO(2)/BDD electrodes were obtained after calcination processes at 700 and 450 degrees C, respectively. The particle sizes of both types of TiO(2) film range from 20 to 30 nm. In comparison with a TiO(2)/indium tin oxide (ITO) electrode, the TiO(2)/BDD electrode demonstrates a higher photoelectrocatalytic activity toward the oxidation of organic compounds, such as glucose and potassium hydrogen phthalate. Among all the tested TiO(2) electrodes, the mixed-phase TiO(2)/BDD electrode demonstrated the highest photoelectrocatalytic activity, which can be attributed to the formation of the p-n heterojunction between TiO(2) and BDD. The electrode was subsequently used to detect a wide spectrum of organic compounds in aqueous solution using a steady-state current method. An excellent linear relationship between the steady-state photocurrents and equivalent organic concentrations was attained. The steady-state oxidation photocurrents of the mixed-phase TiO(2)/BDD electrode were insensitive to pH in the range of pH 2-10. Furthermore, the electrodes exhibited excellent robustness under strong acidic conditions that the TiO(2)/ITO electrodes cannot stand. These characteristics bestow the mixed-phase TiO(2)/BDD electrode to be a versatile material for the sensing of organic compounds. SN - 1520-5827 UR - https://www.unboundmedicine.com/medline/citation/20030335/Photoelectrochemical_characterization_of_a_robust_TiO2/BDD_heterojunction_electrode_for_sensing_application_in_aqueous_solutions_ L2 - https://doi.org/10.1021/la903706e DB - PRIME DP - Unbound Medicine ER -