Citation: Bicheng Ji, Xicheng Li, Shuai Gao, Pengyuan Liu, Jiajie Bao, Lv Qian, Changzheng Wang, Qiang Wang, Chong-Chen Wang. In-situ Z-scheme hetero-phase homojunction significantly enhances the carrier separation efficiency of TiO₂ nanotube arrays: Key role of crystal phase engineering[J]. Chinese Chemical Letters, ;2026, 37(2): 111424. doi: 10.1016/j.cclet.2025.111424 shu

In-situ Z-scheme hetero-phase homojunction significantly enhances the carrier separation efficiency of TiO₂ nanotube arrays: Key role of crystal phase engineering

Bicheng Ji ^a ,
Xicheng Li ^a ,
Shuai Gao ^b ,
Pengyuan Liu ^a ,
Jiajie Bao ^a ,
Lv Qian ^a ,
Changzheng Wang ^{a, *,} ,
Qiang Wang ^{b, *,} ,
Chong-Chen Wang ^{a, *,}

a.
Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
b.
Laboratory for Micro-sized Functional Materials & College of Elementary Education and Department of Chemistry, Capital Normal University, Beijing 100048, China

wangchongchen@bucea.edu.cn

qwchem@gmail.com

changzhwang@163.com

Received Date: 27 December 2024
Revised Date: 29 March 2025
Accepted Date: 6 June 2025
Available Online: 16 June 2025

Figures(5)

Light-energy-driven semiconductor catalysis offers attractive ways to address environmental and energy crises. TiO₂ is the most promising catalyst for photocatalysis, but the lack of charge-carrier separation efficiency severely limits its catalytic performance. In this study, we carried out crystal phase engineering to prepare in situ Z-scheme hetero-phase homojunction of anatase-rutile and clarified the structure-performance relationship. The efficiency of sulfamerazine removal by hetero-phase homojunction TiO₂ nanotube arrays in a single-compartment photocatalytic fuel cell system was improved by 1.93 times compared to conventional anatase TiO₂ nanotube arrays and the degradation pathways were revealed by the Fukui function combined with HP-LCMS. The successful construction of Z-scheme hetero-phase homojunction was confirmed by Raman, X-ray diffraction (XRD), and electron spin resonance (ESR), which combined with density functional theory (DFT) calculations revealed the key role of crystal phase engineering in the construction of hetero-phase homojunction. This work provides a novel strategy for the scientific design of titanium dioxide photocatalysts.
- Crystal phase engineering,
- Z-scheme hetero-phase homojunction,
- TiO₂ nanotube arrays,
- Photocatalytic fuel cells,
- Emerging pollutants
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

In-situ Z-scheme hetero-phase homojunction significantly enhances the carrier separation efficiency of TiO2 nanotube arrays: Key role of crystal phase engineering

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通讯作者: 陈斌, bchen63@163.com

In-situ Z-scheme hetero-phase homojunction significantly enhances the carrier separation efficiency of TiO₂ nanotube arrays: Key role of crystal phase engineering