Magnetic ZnFe2O4/TiO2 nanoparticles-decorated HKUST-1 Heterostructure: Synthesis and visible light-activated Photocatalyst for degradation of cationic and anionic dyes

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-09-11 DOI:10.1016/j.jphotochem.2025.116745

Maedeh Jafari , Mehrnaz Gharagozlou , Mahdi Behzad , Narges Elmi Fard , Mohammad Tavakkoli Yaraki

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Abstract

A visible light-responsive heterostructured magnetic metal-organic framework (MOF), ZnFe₂O₄/TiO₂/HKUST-1, its preparation, and performance in the degradation of methylene blue (MB) and methyl orange (MO) dyes were compared with the performance of ZnFe₂O₄/TiO₂ and ZnFe₂O₄ nanoparticles. Removal experiments were conducted under various conditions, including pH, photocatalyst mass (g), temperature (°C), and dye concentration (mg/L), and the effect of each of these factors on photocatalyst performance was evaluated. Under optimal conditions, the ZnFe₂O₄/TiO₂/HKUST-1 photocatalyst exhibited degradation efficiencies of 97.88 % and 98.93 % for MB and MO dyes, respectively. The results indicate that after 5 cycles, the photocatalyst recovery efficiency is 93.68 % and 95.01 % for MB and MO dyes, respectively. Based on the findings derived from the experiments concerning the degradation of MB and MO dyes, the peak correlation coefficients recorded was 0.9956 and 0.9799, respectively, which pertain to the intraparticle diffusion (IPD) kinetics. Furthermore, evaluation of thermodynamic parameters showed that the Gibbs free energy changes (ΔG°) were negative at all temperatures investigated in the MB and MO photocatalytic processes, indicating that these processes occur spontaneously. In addition, the negative enthalpy changes (ΔH°) during the removal process using ZnFe₂O₄/TiO₂/HKUST-1 indicate the exothermic nature of this process.

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磁性ZnFe2O4/TiO2纳米粒子修饰HKUST-1异质结构：合成及降解阳离子和阴离子染料的可见光活化光催化剂

研究了可见光响应异质结构磁性金属有机骨架（MOF） ZnFe2O4/TiO2/HKUST-1的制备及其降解亚甲基蓝（MB）和甲基橙（MO）染料的性能，并与ZnFe2O4/TiO2和ZnFe2O4纳米颗粒的性能进行了比较。在pH、光催化剂质量(g)、温度（℃）、染料浓度（mg/L）等条件下进行去除实验，并评价各因素对光催化剂性能的影响。在最佳条件下，ZnFe2O4/TiO2/HKUST-1光催化剂对MB和MO染料的降解效率分别为97.88%和98.93%。结果表明，经过5次循环后，光催化剂对MB和MO染料的回收率分别为93.68%和95.01%。基于对MB和MO染料的降解实验，记录到的峰值相关系数分别为0.9956和0.9799，属于颗粒内扩散（IPD）动力学。此外，热力学参数的评估表明，在所研究的MB和MO光催化过程中，吉布斯自由能变化（ΔG°）在所有温度下都为负，表明这些过程是自发发生的。此外，ZnFe2O4/TiO2/HKUST-1在去除过程中的负焓变（ΔH°）表明了该过程的放热性质。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.