About this Engineering article
Boosting piezo-photocatalytic activity of BiVO4/BiFeO3 heterojunctions through built-in polarization field tailoring carrier transfer performances by Qinfang Jing; Zhiyong Liu; Xian Cheng; Cichun Li; Pengrong Ren; Kun Guo; Haojie Yue; Bing Xie; Ting Li; Zhiguo Wang; Longlong Shu is a Engineering article available to read on EtoBox.
The greatest challenge that limits the application of piezo-photocatalytic materials is the low separation efficiency of the generated electron-hole pairs, resulting in poor catalytic activity. Here, the semiconductor n-p heterojunctions BiVO4/BiFeO3 (BVO/BFO) were designed to enhance its piezo-photocatalytic processes. Under the excitation of piezo-vibration and the irradiation of visible light, the BVO/BFO heterojunctions exhibited ultra-high and stable piezo-photocatalytic performance with the degradation rate of Rhodamine B (RhB) solution up to 98 %, and its k value was 6.12 times than that of photocatalysis and 4.36 times than that of piezoelectric catalysis. Thanks to the n-type BVO nanoparticles with good crystallinity were uniformly distributed on the surface of the p-type piezoelectric material BFO, the built-in polarization field was formed and be advantageous to improve the carrier transport performances. A large electron diffusion coefficient (27.44 × 103 cm2·s−1), effective diffusion length (14.49 cm), and long electron lifetime (7.66 × 10-3 s) were achieved in the BVO/BFO heterojunctions, which played important roles to boost the piezo-photocatalytic activity. The pre
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- Author
- Qinfang Jing; Zhiyong Liu; Xian Cheng; Cichun Li; Pengrong Ren; Kun Guo; Haojie Yue; Bing Xie; Ting Li; Zhiguo Wang; Longlong Shu
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)