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首页> 外文期刊>RSC Advances >A magnetically separable plate-like cadmium titanate-copper ferrite nanocomposite with enhanced visible-light photocatalytic degradation performance for organic contaminants
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A magnetically separable plate-like cadmium titanate-copper ferrite nanocomposite with enhanced visible-light photocatalytic degradation performance for organic contaminants

机译：一种磁性可分离的板状镉钛铜铁氧体纳米复合材料，具有增强的有机污染物的可见光光催化降解性能

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摘要

A novel magnetic cadmium titanate-copper ferrite (CdTiO3/CuFe2O4) nanocomposite, in which spherical CuFe2O4 nanoparticles were loaded onto the surface of CdTiO3 nanoplates, was successfully synthesized via a sol-gel hydrothermal route at 180 degrees C. The structure, morphology, magnetic and optical properties of the as-prepared nanocomposite were respectively characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) surface area analysis, UV-visible diffuse reflectance spectroscopy (DRS), vibrating sample magnetometry (VSM) and photoluminescence (PL) spectroscopy. The photocatalytic activity of this novel CdTiO3-based magnetic nanocomposite was investigated for the degradation of organic dye pollutants such as methylene blue (MB), rhodamine B (RhB), and methyl orange (MO) in the presence of H2O2 under visible light irradiation. The results showed that the photocatalyst completely degraded three dyes within 90-100 min. Compared with pure CdTiO3 and CuFe2O4, the heterogeneous CdTiO3/CuFe2O4 nanocomposite exhibited significantly enhanced photocatalytic efficiency. On the basis of the results of the OH trapping and photoluminescence (PL) experiments, the enhanced photocatalytic performance was mainly ascribed to the efficient separation of photo-induced electron-hole pairs and the formation of highly active hydroxyl radicals (OH) species in the CdTiO3/CuFe2O4 photocatalytic oxidation system. The PL measurements of the CdTiO3/CuFe2O4 nanocomposite also indicated an enhanced separation of photo-induced electron-hole pairs. Moreover, the nanocomposite could be easily separated and recycled from contaminant solution using a magnet without a decrease in their photocatalytic activity due to their good magnetic separation performance and excellent chemical stability. Based on these findings, CdTiO3/CuFe2O4 nanocomposite could be a promising visible-light-driven magnetic photocatalyst for converting solar energy to chemical energy for environmental remediation.
机译：一种新型镁钛钛 - 铜铁素体（CDTIO3 / CUFE2O4）纳米复合材料，其中将球形CUFE2O4纳米颗粒装载到CDTIO3纳米层的表面上，通过180℃的溶胶 - 凝胶水热路线成功地合成。结构，形态，磁性用傅里叶变换红外（FT-IR）光谱，X射线衍射（XRD），场发射扫描电子显微镜（FESEM），能量分散X射线（EDX）光谱，分别表征了如制备的纳米复合材料的光学性质。透射电子显微镜（TEM），Brunauer-Emmett-Teller（Bet）表面积分析，UV可见漫射反射光谱（DRS），振动样品磁体（VSM）和光致发光（PL）光谱。研究了该新型CDTIO3的磁性纳米复合物的光催化活性，用于在可见光照射下在H 2 O 2存在下脱甲基蓝（MB），罗丹明B（RHB）和甲基橙（MO）的有机染料污染物的降解。结果表明，光催化剂在90-100分钟内完全降解了三染料。与纯CdtiO3和CuFe2O4相比，非均相CdtiO3 / CuFe2O4纳米复合材料显着提高了光催化效率。在OH诱捕和光致发光（PL）实验的结果的基础上，增强的光催化性能主要归因于光诱导的电子 - 空穴对的有效分离，并在中间形成高活性羟基自由基（OH）物种CDTIO3 / CUFE2O4光催化氧化系统。 CDTIO3 / CUFE2O4纳米复合材料的PL测量还表明光诱导的电子孔对的增强分离。此外，由于其良好的磁性分离性能和优异的化学稳定性，可以使用磁体容易地分离和从污染物溶液中从污染物溶液中再循环，而不会降低它们的光催化活性。基于这些发现，CDTIO3 / CUFE2O4纳米复合材料可以是具有用于将太阳能转换为环境修复的化学能的有希望的可见光驱动的磁性光催化剂。

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  • 来源
    《RSC Advances》 |2019年第27期|共14页
  • 作者

    Jahanara Kosar; Farhadi Saeed;

  • 作者单位

    Lorestan Univ Dept Chem Khorramabad 6815144316 Iran;

    Lorestan Univ Dept Chem Khorramabad 6815144316 Iran;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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