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

被引:2
作者
Lee, Jong-Ho [1 ]
Lee, Young-Ki [2 ]
Kim, Young-Jig [2 ]
Oh, Han-Jun [3 ]
机构
[1] Hanseo Univ, Dept Chem, Seosan 31962, South Korea
[2] Sungkyunkwan Univ, Sch Adv Mat Engn, Suwon 16419, South Korea
[3] Hanseo Univ, Dept Mat Sci, Seosan 31962, South Korea
来源
KOREAN JOURNAL OF MATERIALS RESEARCH | 2021年 / 31卷 / 10期
关键词
photocatalyst; boric acid; TiO2; plasma electrolytic oxidation; dye degradation; INTERSTITIAL BORON; TEMPERATURE; DEGRADATION; FILMS;
D O I
10.3740/MRSK.2021.31.10.552
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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.
引用
收藏
页码:552 / 561
页数:10
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