Synthesis, Characterization, and Enhanced Photocatalytic Degradation of Rose Bengal (RB) Dye Using an α-Fe2O3/MgO Nanocomposite

IF 2.5 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electronic Materials Pub Date : 2024-06-05 DOI:10.1007/s11664-024-11176-9

Sonia, Manoj Kumar Srivastava, V. Agarwal, Harita Kumari, Sourabh Sharma, Monica, Rakesh Kumar, Surjeet Chahal

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Abstract

The current investigation delves into the structural, morphological, optical, and magnetic properties of α-Fe₂O₃, MgO, and an α-Fe₂O₃/MgO nanocomposite, synthesized via an innovative hydrothermal methodology, offering novel insights into their potential application in the purification of dye-contaminated water. Through meticulous analysis, x-ray diffraction (XRD) patterns authenticate the successful formation of the nanocomposite, while high-resolution transmission electron microscopy (HRTEM) reveals nanocrystalline particles with dimensions ranging from 19 nm to 30 nm. A noteworthy observation is the demonstration of a tunable optical bandgap, spanning from 2.20 eV to 3.08 eV, via UV–visible (UV–Vis) spectroscopy, indicative of the integration of wide-bandgap semiconductors, a key feature essential for efficient photocatalytic activity. Evaluation of the magnetic properties using vibrating sample magnetometry (VSM) shows a discernible reduction in magnetization in the nanocomposite, attributed to the incorporation of nonmagnetic MgO into the magnetic α-Fe₂O₃ matrix, thereby revealing unprecedented magnetic modulation. Particularly striking is the exceptional photocatalytic performance of the α-Fe₂O₃/MgO nanocomposite, achieving 84% degradation of rose Bengal (RB) dye under UV light exposure within a remarkably brief 75-min period. This pronounced enhancement in photocatalytic activity is ascribed to the reduced recombination probability of photo-induced carriers, suggesting effective charge transfer within the nanocomposite, thus elucidating its suitability for efficient wastewater treatment, particularly in the domain of dye removal.

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使用 α-Fe2O3/MgO 纳米复合材料合成玫瑰红 (RB) 染料、确定其特性并增强其光催化降解能力

目前的研究深入研究了α-Fe2O3、MgO和α-Fe2O3/MgO纳米复合材料的结构、形态、光学和磁性，通过创新的水热方法合成，为它们在净化染料污染水方面的潜在应用提供了新的见解。通过细致的分析，x射线衍射（XRD）图谱证实了纳米复合材料的成功形成，而高分辨率透射电子显微镜（HRTEM）显示了尺寸在19 nm至30 nm之间的纳米晶体颗粒。一个值得注意的观察结果是，通过紫外-可见（UV-Vis）光谱显示了一个可调谐的光学带隙，范围从2.20 eV到3.08 eV，表明了宽带隙半导体的集成，这是高效光催化活性的关键特征。利用振动样品磁强计（VSM）对纳米复合材料的磁性进行了评估，结果表明，由于将非磁性MgO掺入磁性α-Fe2O3基体中，纳米复合材料的磁化强度明显降低，从而显示出前所未有的磁调制。特别引人注目的是α-Fe2O3/MgO纳米复合材料的特殊光催化性能，在紫外线照射下，在非常短的75分钟内实现了84%的玫瑰红（RB）染料降解。光催化活性的显著增强归因于光诱导载体的重组概率降低，表明纳米复合材料内部有效的电荷转移，从而阐明了其对高效废水处理的适用性，特别是在染料去除领域。

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.