Surface Characteristics and Photocatalytic Propertiy of B Doped TiO2 Layer Synthesized by Plasma Electrolytic Oxidation Process

Jong-Ho Lee; Young-Ki Lee; Young-Jig Kim; Han-Jun Oh

doi:10.3740/MRSK.2021.31.10.552

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2021 Vol.31, Issue 10 Preview Page Next Page

Surface Characteristics and Photocatalytic Propertiy of B Doped TiO₂ Layer Synthesized by Plasma Electrolytic Oxidation Process Plasma Electrolytic Oxidation 방식으로 제조된 B Doped TiO₂의 표면특성과 광촉매 특성

October 2021. pp. 552-561

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Abstract

For the purpose of manufacturing a high efficiency TiO₂ photocatalyst, B-doped TiO₂ photocatalysts are synthesized using a plasma electrolytic oxidation method in 0.5 M H2SO4 electrolyte with different concentrations of H₃BO₃ as additive. For the B doped TiO₂ layer fabricated from sulfuric electrolyte having a higher concentration of H₃BO₃ additive, the main XRD peaks of (101) and (200) anatase phase shift gradually toward the lower angle direction, indicating volume expansion of the TiO₂ anatase lattice by incorporation of boron, when compared with TiO₂ layers formed in sulfuric acid with lower concentration of additive. Moreover, XPS results indicate that the center of the binding energy peak of B1s increases from 191.45 eV to 191.98 eV, which suggests that most of boron atoms are doped interstitially in the TiO₂ layer rather than substitutionally. The B doped TiO₂ catalyst fabricated in sulfuric electrolyte with 1.0 M H₃BO₃ exhibits enhanced photocurrent response, and high efficiency and rate constant for dye degradation, which is ascribed to the synergistic effect of the new impurity energy band induced by introducing boron to the interstitial site and the improvement of charge transfer reaction.

Keywords

photocatalyst

boric acid

TiO₂

plasma electrolytic oxidation

dye degradation

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 31
No :10
Pages :552-561
Received Date : 2021-09-12
Revised Date : 2021-09-16
Accepted Date : 2021-09-16
DOI :https://doi.org/10.3740/MRSK.2021.31.10.552

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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