Shanthi S I, Poovaragan S, Arularasu M V, Nithya S, Sundaram R, Magdalane C Maria, Kaviyarasu K, Maaza M
Department of Chemistry, Vels University, Chennai 600117, Tamil Nadu, India.
PG and Research Department of Chemistry, Presidency College (Autonomous), Chennai 600005, Tamil Nadu, India.
J Nanosci Nanotechnol. 2018 Aug 1;18(8):5441-5447. doi: 10.1166/jnn.2018.15442.
Nanoparticles of Li, Mg and Sr doped and undoped zinc oxide was prepared by simple precipitation method. The structural, optical, and magnetic properties of the samples were investigated by the Powder X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), Fourier Transform Infrared (FTIR) spectroscopy, Ultra-violet Visible spectroscopy (UV-vis) spectra, Photoluminescence (PL) and Vibrational Sample Magnetometer (VSM). The Powder X-ray diffraction data confirm the formation of hexagonal wurtzite structure of all doped and undoped ZnO. The SEM photograph reveals that the pores availability and particles size in the range of 10 nm-50 nm. FTIR and UV-Visible spectra results confirm the incorporation of the dopant into the ZnO lattice nanostructure. The UV-Visible spectra indicate that the shift of blue region (lower wavelength) due to bandgap widening. Photoluminescence intensity varies with doping due to the increase of oxygen vacancies in prepared ZnO. The pure ZnO exist paramagnetic while doped (Li, Mg and Sr) ZnO exist ferromagnetic property. The photocatalytic activity of the prepared sample also carried out in detail.
采用简单沉淀法制备了锂、镁和锶掺杂及未掺杂的氧化锌纳米颗粒。通过粉末X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、傅里叶变换红外（FTIR）光谱、紫外可见光谱（UV-vis）、光致发光（PL）和振动样品磁强计（VSM）对样品的结构、光学和磁性进行了研究。粉末X射线衍射数据证实了所有掺杂和未掺杂的ZnO均形成六方纤锌矿结构。扫描电子显微镜照片显示，孔隙率和颗粒尺寸在10nm至50nm范围内。傅里叶变换红外光谱和紫外可见光谱结果证实了掺杂剂掺入到ZnO晶格纳米结构中。紫外可见光谱表明，由于带隙变宽，蓝色区域（较低波长）发生了位移。由于制备的ZnO中氧空位的增加，光致发光强度随掺杂而变化。纯ZnO具有顺磁性，而掺杂（锂、镁和锶）的ZnO具有铁磁性。还详细研究了制备样品的光催化活性。
