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磁性SrTiO/NiFeO异质结纳米复合材料的制备及其光催化性能

Fabrication and photocatalytic property of magnetic SrTiO/NiFeO heterojunction nanocomposites.

作者信息

Xia Yongmei, He Zuming, Lu Yalin, Tang Bin, Sun Shunping, Su Jiangbin, Li Xiaoping

机构信息

Jiangsu Key Laboratory of Advanced Material Design and Additive Manufacturing, School of Materials and Engineering, Jiangsu University of Technology Changzhou 213001 China.

Huaide School, Changzhou University Jingjiang 214500 China

出版信息

RSC Adv. 2018 Jan 31;8(10):5441-5450. doi: 10.1039/c7ra12393k. eCollection 2018 Jan 29.

DOI:10.1039/c7ra12393k
PMID:35542406
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9078118/
Abstract

Novel multifunctional SrTiO/NiFeO nanocomposites were successfully fabricated a two-step route. The as-prepared samples were characterized by using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), field-emission transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy and vibrating sample magnetometry (VSM). The results indicate that the SrTiO/NiFeO heterostructures are composed of SrTiO spheroidal nanoparticles adhered to NiFeO polyhedra. The heterojunction established in the composite material accelerates the process of electron-hole pair separation and boosts the photo-Fenton reaction. Among the samples, 15 wt% SrTiO/NiFeO nanocomposites exhibit a powerful light response and excellent room temperature ferromagnetism. Subsequently, the photocatalytic degradation of RhB over the as-prepared samples was investigated and optimized, revealing that the 15 wt% SrTiO/NiFeO nanocomposites exhibit the best photocatalytic activity and stability under simulated solar light irradiation. Furthermore, according to experimental results, the possible mechanism of improved photocatalytic activity was also proposed.

摘要

通过两步法成功制备了新型多功能SrTiO/NiFeO纳米复合材料。采用X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、能量色散光谱（EDS）、场发射透射电子显微镜（TEM）、紫外可见漫反射光谱（DRS）、X射线光电子能谱（XPS）、光致发光（PL）光谱和振动样品磁强计（VSM）对所制备的样品进行了表征。结果表明，SrTiO/NiFeO异质结构由附着在NiFeO多面体上的SrTiO球形纳米颗粒组成。复合材料中形成的异质结加速了电子-空穴对的分离过程，并促进了光芬顿反应。在这些样品中，15 wt%的SrTiO/NiFeO纳米复合材料表现出强烈的光响应和优异的室温铁磁性。随后，对所制备样品上罗丹明B的光催化降解进行了研究和优化，结果表明，15 wt%的SrTiO/NiFeO纳米复合材料在模拟太阳光照射下表现出最佳的光催化活性和稳定性。此外，根据实验结果，还提出了光催化活性提高的可能机理。

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