铜渣负载纳米ZnFe2O4光催化降解水中乙苯:优化、动力学和热力学研究

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY
Hossein Malekhossini, K. Mahanpoor
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引用次数: 0

摘要

采用共沉淀法和热法制备了ZnFe2O4/铜渣(CS)催化剂。采用XRD、SEM、EDX和BET等方法对合成的催化剂进行了表征。x射线衍射图证实,在CS沸石上稳定后,ZnFe2O4的晶体结构没有变化。扫描电镜图像显示,尽管颗粒大小不同,但它们都具有相同的形状。在逆流填料床光反应器中,用UV + H2O2法测试了该催化剂对水中乙苯的光催化活性。采用全因子法对工艺进行了优化和建模。EB初始浓度为30 ppm, pH = 9, H2O2初始浓度为15 ppm为最佳条件。在理想工艺条件下,EB的去除率大于99.5%。用EB光催化降解实验结果验证了Langmuir-Hinshelwood动力学模型的有效性。根据过渡态理论计算了ZnFe2O4/CS催化剂在UV+H2O2过程中光催化降解EB的值〖∆H〗^⫲和〖∆S〗^⫲,分别得到了1.67 kJ mol-1和-263.057 J K-1 mol-1。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Photocatalytic Degradation of Ethylbenzene in Aqueous Solutions by ZnFe2O4 Nanoparticles Supported on the Copper Slag: Optimization, Kinetics and Thermodynamics Studies
ZnFe2O4/Copper slag (CS) which is an environmentally friendly and cost-effective catalyst was produced by co-precipitation methods and a thermal process. The synthesized catalyst was characterized by XRD, SEM, EDX and BET surface area analysis. The X-rays diffraction pattern confirmed that the crystal structure of ZnFe2O4 after stabilization on CS zeolite has not changed. The SEM images showed that, despite their varying sizes, the particles all have the same shape. Photocatalytic activity of the catalyst was tested for the degradation of ethylbenzene (EB) in water by UV + H2O2 method in the reverse-flow packed bed photo reactor. The process optimization and modeling were performed using the full factorial method. The initial concentration of EB = 30 ppm, pH = 9 and initial H2O2 concentration = 15 ppm were the best conditions. Under ideal process conditions, the removal efficiency of EB was greater than 99.5%. The validity of the Langmuir-Hinshelwood kinetics model was confirmed using EB photocatalytic degradation experimental results. The values of 〖∆H〗^⫲and 〖∆S〗^⫲ for the photocatalytic degradation of EB by ZnFe2O4/CS catalyst in the UV+H2O2 process were calculated based on the transition state theory and gave 1.67 kJ mol-1 and -263.057 J K-1 mol-1 respectively.
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来源期刊
Physical Chemistry Research
Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
2.70
自引率
8.30%
发文量
18
期刊介绍: The motivation for this new journal is the tremendous increasing of useful articles in the field of Physical Chemistry and the related subjects in recent years, and the need of communication between Physical Chemists, Physicists and Biophysicists. We attempt to establish this fruitful communication and quick publication. High quality original papers in English dealing with experimental, theoretical and applied research related to physics and chemistry are welcomed. This journal accepts your report for publication as a regular article, review, and Letter. Review articles discussing specific areas of physical chemistry of current chemical or physical importance are also published. Subjects of Interest: Thermodynamics, Statistical Mechanics, Statistical Thermodynamics, Molecular Spectroscopy, Quantum Chemistry, Computational Chemistry, Physical Chemistry of Life Sciences, Surface Chemistry, Catalysis, Physical Chemistry of Electrochemistry, Kinetics, Nanochemistry and Nanophysics, Liquid Crystals, Ionic Liquid, Photochemistry, Experimental article of Physical chemistry. Mathematical Chemistry.
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