Citation: Zhiwen HU, Jiayan ZHOU, Huiying ZHANG, Yulong YANG, Ping LI, Zelong CHEN, Weixia DONG, Qifu BAO. Influence mechanism of stoichiometric ratio on the catalytic performance of Bi₁₂TiO₂₀/BaTiO₃ heterojunction[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(4): 773-788. doi: 10.11862/CJIC.20250251 shu

Influence mechanism of stoichiometric ratio on the catalytic performance of Bi₁₂TiO₂₀/BaTiO₃ heterojunction

Zhiwen HU ^{1, 2} ,
Jiayan ZHOU ² ,
Huiying ZHANG ² ,
Yulong YANG ² ,
Ping LI ¹ ,
Zelong CHEN ² ,
Weixia DONG ^{1, 2,,} ,
Qifu BAO ²

1.
National Engineering Research Center for Domestic & Building Ceramics, Jingdezhen, Jiangxi 333403, China
2.
School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen, Jiangxi 333403, China

Corresponding author: Weixia DONG, weixia_dong@sina.com
Received Date: 2 August 2025
Revised Date: 8 January 2026

Figures(11)

This study systematically investigates the influence of Ba/Bi stoichiometric ratios on the crystal structure, morphological evolution, and catalytic properties of Bi₁₂TiO₂₀/BaTiO₃ composites. A series of characterization techniques, including powder X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet-visible absorption spectroscopy, and scanning electron microscopy, was employed to track the phase transformation and structural development of the materials. The synthesis process, particularly under “shearing effect” in alkaline conditions, promoted a multi-stage evolution pathway: chemical bond reorganization, crystal nucleation, oriented growth, and Ostwald ripening. The catalytic performance was evaluated through dye degradation experiments under different energy excitation conditions. The results revealed reaction rate constants (k) of 2.05×10^-2 min^-1 (ultrasonic vibration), 1.06×10^-1 min^-1 (light irradiation), and 1.47×10^-1 min^-1 (coupled ultrasonic-light irradiation), indicating a significant synergistic piezo-photocatalytic effect. This enhanced activity is mainly ascribed to two factors: the established Bi₁₂TiO₂₀/BaTiO₃ heterojunction facilitates efficient transport of photogenerated charge carriers, while the intrinsic built-in electric field of BaTiO₃ promotes effective carrier separation.
- Bi₁₂TiO₂₀/BaTiO₃,
- stoichiometric ratio,
- regulation,
- piezo-photocatalysis
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Influence mechanism of stoichiometric ratio on the catalytic performance of Bi12TiO20/BaTiO3 heterojunction

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Influence mechanism of stoichiometric ratio on the catalytic performance of Bi₁₂TiO₂₀/BaTiO₃ heterojunction