Microstructure, optical and photocatalytic properties of MgO nanoparticles
Microstructure, optical and photocatalytic properties of MgO nanoparticles
复制标题
DOI：
10.1016/j.rinp.2020.103013
复制
发表时间：
2020-03-01
影响因子：
5.3
通讯作者：
Raslan, Emad H.
中科院分区：
文献类型：
--
作者：
Balakrishnan, G.;Velavan, R.;Raslan, Emad H.
本文主要研究了燃烧法合成纳米氧化镁。硝酸镁用作前体，尿素用作燃料。将前体材料与燃料沿着溶解在50 ml DI水中，并将溶液在80 ℃下加热2 h。然后，将溶液转移到坩埚中并将其保持在500摄氏度的温度下。采用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、场发射扫描电子显微镜（FESEM）、光致发光（PL）和光催化研究等手段对合成的纳米MgO粉体进行了分析。XRD结果表明MgO纳米粒子为立方结构，晶粒尺寸约为27 nm。FESEM研究表明，形成的球形MgO微晶。此外，MgO纳米颗粒是多孔的和团聚的。MgO材料的PL谱显示出发射峰，这表明发生了带隙为2.9 eV的带-带跃迁。以亚甲基蓝染料为目标染料，考察了MgO纳米粒子在紫外光下的光催化降解性能。光催化研究表明，75%的催化剂的降解效率后，120分钟的照射。因此，MgO纳米颗粒（NPs）可用于染料工业废水的处理。
The present work is focused on the synthesize of MgO nanoparticles using combustion method. The magnesium nitrate is used as a precursor with urea as a fuel. The precursor material is dissolved in 50 ml DI water along with the fuel and the solution is heated at 80 degrees C for 2 h. Then, the solution is transferred to crucible and kept it in the temperature of 500 degrees C. The as-synthesized MgO nanopowders are analyzed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), photoluminescence (PL) and photocatalytic studies. The XRD results of MgO nanoparticles indicated the cubic structure with the crystallite size of 27 nm. The FESEM studies indicated the formation of MgO crystallites in spherical shape. In addition, MgO nanoparticles are porous and agglomerated. PL spectrum of MgO materials exhibit emission peaks, which indicates the occurrence of band to band transition with the bandgap of 2.9 eV. The photocatalytic degradation of methylene blue dye is evaluated using the as-prepared MgO nanoparticles under UV light. The photocatalytic studies indicate the 75% degradation efficiency of the catalyst after 120 min irradiation. Hence, the MgO Nanoparticles (NPs) can be used for the treatment of effluents from the dye industries.