Photocatalytic performance assessment of Fe-N co-doped TiO2/β-cyclodextrin hybrid systems prepared by supercritical antisolvent micronization for organic dyes removal

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL Journal of Supercritical Fluids Pub Date : 2023-10-01 DOI:10.1016/j.supflu.2023.106005

Stefania Mottola , Antonietta Mancuso , Olga Sacco , Iolanda De Marco , Vincenzo Vaiano

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引用次数: 1

Abstract

This work aims to demonstrate that micronized β-cyclodextrin (β-CD) improves the photocatalytic activity of Fe-N-TiO₂. Fe-N-TiO₂/β-CD hybrid systems were employed in the photocatalytic removal of Acid Orange7 (AO7) and Methylene Blue (MB). The supercritical antisolvent process (SAS) was used to micronize β-CD at different pressures. The chemical-physical properties of the hybrid photocatalysts were detected through various characterization methods. Wide angle X-ray diffraction patterns evidenced the anatase as the typical TiO₂ crystalline phase. FT-IR spectra showed interactions between β-CD and Fe-N-TiO₂. The activity of photocatalysts in the degradation of AO7 and MB dyes was analyzed under UV and visible light irradiation. Fe-N-TiO₂/β-CD120 photocatalyst led to the total UV light-driven discoloration of the AO7 aqueous solution. Instead, the Fe-N-TiO₂/β-CD120 system allowed for achieving an MB discoloration kinetic constant under visible light higher than the AO7 discoloration kinetic constant. Reuse cycle tests proved that the Fe-N-TiO₂/β-CD120 sample is a stable photocatalytic material.

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超临界抗溶剂微粉制备Fe-N共掺杂TiO2/β-环糊精杂化体系光催化脱除有机染料性能评价

本工作旨在证明微粉化的β-环糊精（β-CD）提高了Fe-N-TiO2的光催化活性。采用Fe-N-TiO2/β-CD混合体系对酸性橙7（AO7）和亚甲基蓝（MB）进行了光催化去除。采用超临界反溶剂法（SAS）在不同压力下对β-CD进行微粉化。通过各种表征方法检测了杂化光催化剂的化学物理性质。广角X射线衍射图证明锐钛矿是典型的TiO2结晶相。红外光谱显示了β-CD与Fe-N-TiO2的相互作用。在紫外和可见光照射下，分析了光催化剂对AO7和MB染料的降解活性。Fe-N-TiO2/β-CD120光催化剂导致AO7水溶液的全紫外光驱动变色。相反，Fe-N-TiO2/β-CD120体系允许在可见光下实现高于AO7变色动力学常数的MB变色动力学常数。重复使用循环试验证明，Fe-N-TiO2/β-CD120样品是一种稳定的光催化材料。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.