Novel Fe2O3/Bi2O3/CeO2 heterojunction photocatalyst for wastewater treatment: Characterization, photocatalytic performance and mechanism study

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Liquids Pub Date : 2024-07-23 DOI:10.1016/j.molliq.2024.125580

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Abstract

A novel ternary Fe₂O₃/Bi₂O₃/CeO₂ (FeB/CeO₂) heterojunction nanocomposite with different Fe₂O₃/Bi₂O₃ amounts on CeO₂ (5, 10, 20, 30 and 40 wt%) was synthesized through a simple wet impregnation process. The properties of the synthesized nanocomposite were validated thorough XPS, XRD, FE-SEM, TEM, and EDS-Mapping analyses. This photocatalyst exhibited exceptional efficiency in the of Tetracycline’s (TC) photodegradation in comparison to individual Fe₂O₃, Bi₂O₃, and CeO₂. The effect of Fe₂O₃/Bi₂O₃ loading on CeO₂ and the influence of operational factors on TC decomposition including photocatalyst dosage (0.05–0.2 g/L), TC concentration (10–40 mg/L), and pH (1–11) were examined with the optimal conditions yielding an experimental degradation efficiency of 99.35 %. Moreover, scavenger tests showed that O₂⁻ and OH radicals served as the main oxidative radical species. The study further delved into proposing potential degradation pathways of TC in accordance with liquid chromatography tandem-mass spectrometry analysis. Notably, the stability of the synthesized photocatalyst was assessed through five degradation cycles, affirming its sustained effectiveness.

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用于废水处理的新型 Fe2O3/Bi2O3/CeO2 异质结光催化剂：表征、光催化性能和机理研究

通过简单的湿法浸渍工艺，合成了一种新型三元氧化铁/氧化铋/氧化钴（FeB/CeO）异质结纳米复合材料，其中氧化铁/氧化铋在氧化钴上的含量各不相同（5、10、20、30 和 40 wt%）。通过 XPS、XRD、FE-SEM、TEM 和 EDS-Mapping 分析验证了合成纳米复合材料的性能。与单独的 FeO、BiO 和 CeO 相比，这种光催化剂在四环素（TC）的光降解方面表现出卓越的效率。研究了 CeO 上 FeO/BiO 负载量的影响以及光催化剂用量（0.05-0.2 g/L）、TC 浓度（10-40 mg/L）和 pH 值（1-11）等操作因素对 TC 分解的影响，在最佳条件下，实验降解效率达到 99.35%。此外，清除剂测试表明，O 和 OH 自由基是主要的氧化自由基种类。研究还根据液相色谱串联质谱分析，进一步探讨了三氯甲烷的潜在降解途径。值得注意的是，通过五个降解周期对合成光催化剂的稳定性进行了评估，肯定了其持续有效性。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.