Vinosha P Annie, Xavier Belina, Krishnan S, Das S Jerome
Department of Physics, Loyola College, Chennai 600034, India.
Department of Physics, Stella Maris College, Chennai 600086, India.
J Nanosci Nanotechnol. 2018 Aug 1;18(8):5354-5366. doi: 10.1166/jnn.2018.15427.
We report the influence of Co1-xZnxFe2O4 nanoferrites for the photodegradation of organic pollutant present in the aqueous solution. A series of Co1-xZnxFe2O4 (x = 0.01, 0.03, 0.05 and 0.10) nanoferrites have been synthesized via a facile and economically viable coprecipitation technique and investigated the effect of zinc dopant in their structural, optical, electrical and magnetic properties. X-ray diffraction and Fourier Transform Infrared spectral studies reveal the spinel phase formation of the as-synthesized nanoferrites. Photoluminescence and UV-visible spectral studies show the bandgap of nanoferrites increase from 2.47-2.67 eV and exhibited a blue shift in the band edge emission with respect to increase in Zn content. Phase transition of the samples from weak ferromagnetic to superparamagnetic nature has been observed by Vibrating Sample Magnetometer at room temperature. Furthermore, the Co1-xZnxFe2O4 was assessed for the degradation of Methylene Blue (MB) dye and the sample with Co1-0.10Zn0.10Fe2O4 showed better photocatalytic degradability of organic MB due to its enhanced adsorption in the visible region and the existence of lower concentration charge-carriers.
我们报道了Co1-xZnxFe2O4纳米铁氧体对水溶液中有机污染物光降解的影响。通过一种简便且经济可行的共沉淀技术合成了一系列Co1-xZnxFe2O4（x = 0.01、0.03、0.05和0.10）纳米铁氧体，并研究了锌掺杂对其结构、光学、电学和磁学性质的影响。X射线衍射和傅里叶变换红外光谱研究揭示了合成的纳米铁氧体的尖晶石相形成。光致发光和紫外-可见光谱研究表明，纳米铁氧体的带隙从2.47 - 2.67 eV增加，并且随着锌含量的增加，带边发射出现蓝移。在室温下用振动样品磁强计观察到样品从弱铁磁性到超顺磁性的相变。此外，评估了Co1-xZnxFe2O4对亚甲基蓝（MB）染料的降解情况，具有Co1-0.10Zn0.10Fe2O4的样品由于其在可见光区域增强的吸附以及较低浓度电荷载流子的存在，对有机MB表现出更好的光催化降解性。
