Z-Scheme CeO2@PDA/BiOBr heterojunction with PDA electronic transfer medium for photocatalytic elimination of methylene blue and tetracycline

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2025-03-03 DOI:10.1016/j.molstruc.2025.141925

Mengmeng Zhang, Rongxiang Zhu, Biao Deng, Yi Huang, Honghe Ren

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引用次数: 0

Abstract

Herein, a Z-Scheme CeO₂@PDA/BiOBr heterojunction was prepared through in situ self-polymerization and hydrothermal method, where PDA layer not only facilitated the attachment between CeO₂ and BiOBr, but also acted as an electron transfer bridge in the composite. A close interfacial contact between CeO₂@PDA nano-particles and flower-like BiOBr was observed via scanning electron microscope images. Compared with CeO₂, CeO₂@PDA and BiOBr, the CeO₂@PDA/BiOBr exhibits smaller band gap energy, higher transient photocurrent and lower transfer resistance. The CeO₂@PDA/BiOBr was effective in decomposition of tetracycline (TC) and methylene blue (MB) with visible light illumination, demonstrating 100 % elimination efficiency of TC and MB. Furthermore, after five recycles, 84.66 % and 89.41 % of the original photocatalytic capability for TC and MB degradation, respectively, were preserved, revealing the cycling stability and reusability of CeO₂@PDA/BiOBr. Moreover, the CeO₂@PDA/BiOBr also maintains relatively stable removal efficiency of contaminants over the pH range of 2–9. The enhanced properties of CeO₂@PDA/BiOBr is mainly owning to the Z-scheme heterojunction between CeO₂ nanoparticles and flower-like BiOBr and PDA interfacial interaction layer, which boosted the separation and motability of photo-excited e/h⁺ pairs. The present work offers a reference for the design and construction of composite photocatalysts with efficient interfacial electron transfer medium.

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.