Microwave assisted sol gel synthesis of Fe2O3@TiO2 core–shell nanocomposite for the enhanced photocatalytic activity under visible light and the investigation of their optical properties

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2024-11-09 DOI:10.1016/j.apt.2024.104714

Md. Obaidullah , Newaz Mohammed Bahadur , Md. Abdullah Al Nahid , Iqbal Ahmed Siddiquey , Takeshi Furusawa , Masahide Sato , Noboru Suzuki

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Abstract

Core-shell nanocomposites (NCs) of Fe₂O₃@TiO₂ were synthesized using a microwave assisted sol–gel method in a relatively short time. These NCs were characterized using several techniques, including Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The TEM images showed the formation of a ∼ 4.2 nm TiO₂ layer around the spherical Fe₂O₃ core particles. The presence of Ti 2p peaks in both the wide and narrow scan XPS spectra, along with the distinct diffraction peak in the XRD patterns, confirmed the successful synthesis of Fe₂O₃@TiO₂ NCs. Vibration sample magnetometer (VSM) analysis showed that the NCs exhibited sufficient magnetization for catalyst separation after photocatalytic tests. The photocatalytic performance of the Fe₂O₃@TiO₂ NCs was compared with that of uncoated Fe₂O₃ nanoparticles for methylene blue degradation under visible light.

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微波辅助溶胶凝胶合成用于增强可见光下光催化活性的 Fe2O3@TiO2 核壳纳米复合材料及其光学性质的研究

采用微波辅助溶胶-凝胶法在较短时间内合成了Fe2O3@TiO2的核壳纳米复合材料（NCs）。研究人员使用多种技术对这些 NCs 进行了表征，包括傅立叶变换红外光谱（FT-IR）、场发射扫描电子显微镜（FE-SEM）、漫反射光谱（DRS）、透射电子显微镜（TEM）、X 射线衍射（XRD）和 X 射线光电子能谱（XPS）。TEM 图像显示，在球形 Fe2O3 核心颗粒周围形成了一层 ∼ 4.2 nm 的 TiO2 层。宽扫描和窄扫描 XPS 光谱中都出现了 Ti 2p 峰，XRD 图谱中也出现了明显的衍射峰，这证实了 Fe2O3@TiO2 NCs 的成功合成。振动样品磁力计（VSM）分析表明，在光催化测试后，NCs 表现出足够的磁化率，可用于催化剂分离。比较了 Fe2O3@TiO2 NCs 与未涂层 Fe2O3 纳米粒子在可见光下降解亚甲基蓝的光催化性能。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)