Citation: Zhiwen HU, Huiying ZHANG, Jiayan ZHOU, Yulong YANG, Ping LI, Zelong CHEN, Weixia DONG, Qifu BAO. Time evolution of in-situ synthesized Bi₁₂TiO₂₀/BaTiO₃ heterojunctions and catalytic mechanisms[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(1): 65-77. doi: 10.11862/CJIC.20250172 shu

Time evolution of in-situ synthesized Bi₁₂TiO₂₀/BaTiO₃ heterojunctions and catalytic mechanisms

Zhiwen HU ^{1, 2} ,
Huiying ZHANG ² ,
Jiayan ZHOU 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: 25 May 2025
Revised Date: 7 November 2025

Figures(10)

To address the issues of high carrier recombination rate and poor photoresponse capability in photocatalysts, a visible-light-responsive Bi₁₂TiO₂₀/BaTiO₃ composite piezo-photocatalyst was synthesized in situ by the "shearing effect" of alkaline KOH. The built-in electric field of BaTiO₃ was utilized to modulate the photogenerated carrier transport behavior in Bi₁₂TiO₂₀, thereby enhancing charge separation efficiency. The synthesized powders were systematically characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-Vis) absorption spectroscopy, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM), with particular focus on phase composition and morphological evolution. The time-dependent formation process of Bi₁₂TiO₂₀/BaTiO₃ was successfully elucidated. The piezo-photocatalytic degradation reaction rate constant of Bi₁₂TiO₂₀/BaTiO₃ for dyes reached 9.76×10^-2 min^-1, outperforming that of piezocatalysis (2.39×10^-2 min^-1) and photocatalysis (8.17×10^-2 min^-1). Furthermore, the enhanced piezo-photocatalytic mechanism was elucidated by combining free radical trapping experiments, electron spin resonance (ESR) spectroscopy, and the band structure of the Bi₁₂TiO₂₀/BaTiO₃ heterojunction.
- piezo-photocatalysis,
- evolution process,
- heterojunction,
- enhancement mechanism
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通讯作者: 陈斌, bchen63@163.com

Time evolution of in-situ synthesized Bi₁₂TiO₂₀/BaTiO₃ heterojunctions and catalytic mechanisms