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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：磁性可分离的板状钛酸镉-铜铁氧体纳米复合材料，具有增强的可见光对有机污染物的光催化降解性能

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A novel magnetic cadmium titanate–copper ferrite (CdTiO _(3) /CuFe _(2) O _(4) ) nanocomposite, in which spherical CuFe _(2) O _(4) nanoparticles were loaded onto the surface of CdTiO _(3) nanoplates, was successfully synthesized via a sol–gel hydrothermal route at 180 °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 CdTiO _(3) -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 H _(2) O _(2) under visible light irradiation. The results showed that the photocatalyst completely degraded three dyes within 90–100 min. Compared with pure CdTiO _(3) and CuFe _(2) O _(4) , the heterogeneous CdTiO _(3) /CuFe _(2) O _(4) 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 CdTiO _(3) /CuFe _(2) O _(4) photocatalytic oxidation system. The PL measurements of the CdTiO _(3) /CuFe _(2) O _(4) 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, CdTiO _(3) /CuFe _(2) O _(4) nanocomposite could be a promising visible-light-driven magnetic photocatalyst for converting solar energy to chemical energy for environmental remediation.
机译：一种新型的磁性钛酸镉铜铁氧体（CdTiO _（3）/ CuFe _（2）O _（4））纳米复合材料，其中球形CuFe _（2）O _（4）纳米颗粒被装载到CdTiO _的表面上（3）纳米板是通过溶胶-凝胶水热途径在180°C下成功合成的。制备的纳米复合材料的结构，形貌，磁学和光学性质分别通过傅里叶变换红外光谱，X射线衍射，场发射扫描电子显微镜，能量色散X-射线表征。射线（EDX）光谱，透射电子显微镜（TEM），布鲁诺尔-埃米特-泰勒（BET）表面积分析，紫外-可见漫反射光谱（DRS），振动样品磁力分析（VSM）和光致发光（PL）光谱。研究了这种新颖的基于CdTiO _（3）的磁性纳米复合材料的光催化活性，以在H _存在下降解有机染料污染物，如亚甲基蓝（MB），若丹明B（RhB）和甲基橙（MO）。 （2）O _（2）在可见光照射下。结果表明，光催化剂在90-100分钟内完全降解了三种染料。与纯CdTiO _（3）和CuFe _（2）O _（4）相比，非均相CdTiO _（3）/ CuFe _（2）O _（4）纳米复合材料表现出显着提高的光催化效率。根据OH捕获和光致发光（PL）实验的结果，增强的光催化性能主要是由于有效分离了光诱导的电子-空穴对和高活性羟基（OH）物种的形成。 CdTiO _（3）/ CuFe _（2）O _（4）光催化氧化系统。 CdTiO _（3）/ CuFe _（2）O _（4）纳米复合材料的PL测量结果也表明，光致电子-空穴对的分离增强。而且，由于其良好的磁分离性能和优异的化学稳定性，使用磁体可以容易地将纳米复合材料从污染物溶液中分离和再循环而不降低其光催化活性。基于这些发现，CdTiO _（3）/ CuFe _（2）O _（4）纳米复合材料可能是一种有前途的可见光驱动的磁性光催化剂，用于将太阳能转化为化学能进行环境修复。

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