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Co3O4 Nanoparticles Modified TiO2 Nanotube Arrays with Improved Photoelectrochemical Performance

  • Physicochemical Studies of Systems and Processes
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Abstract

Co3O4 modified TiO2 nanotube arrays (TiO2-NTs) were successfully fabricated by electrodeposition and thermal oxidation process. The prepared samples were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopic (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-visible diffuse reflectance spectroscopy. The photoelectrocatalytic properties of as-prepared samples were investigated under visible light and UV-vis light irradiation. Meanwhile, taking methyl orange aqueous solution as target substrate for photoelectrocatalytic degradation experiments, the degradation rate under UV-vis light irradiation and dark condition were evaluated. The prepared Co3O4/TiO2-NTs exhibited much higher photoelectrochemical activity than TiO2-NTs under visible light irradiation and UV-vis light irradiation. The degradation rate of methyl orange on Co3O4/TiO2-NTs electrode reaches 90.7% under applied potential of 1.3 V and UV-vis light irradiation for 10 h, which is only 53.4% on TiO2-NTs electrode. The improved performance could be attributed to the higher photo-generated carrier concentration and carrier mobility.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China

    Huazhen Cao, Yueheng Lu, Wei Ning, Huibin Zhang & Guoqu Zheng

Authors
  1. Huazhen Cao
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  2. Yueheng Lu
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  3. Wei Ning
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  4. Huibin Zhang
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  5. Guoqu Zheng
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Correspondence to Guoqu Zheng.

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The text was submitted by the authors in English.

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Cao, H., Lu, Y., Ning, W. et al. Co3O4 Nanoparticles Modified TiO2 Nanotube Arrays with Improved Photoelectrochemical Performance. Russ J Appl Chem 92, 64–70 (2019). https://doi.org/10.1134/S1070427219010099

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  • DOI: https://doi.org/10.1134/S1070427219010099

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