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Synthesis and enhanced photocatalytic property of Ni doped ZnS nanoparticles

机译：Ni掺杂ZnS纳米粒子的合成及增强的光催化性能

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摘要

Pure and Ni (0.5-2.0%) doped ZnS nanoparticles were prepared by an inexpensive solid state reaction method. The structural, functional, optical, morphological and chemical compositions of the products were characterized by XRD, FT-IR, UV-Vis, PL, SEM with EDX and TEM analyses. The X-ray diffraction results confirmed that the polycrystalline nature with cubic crystal structure of the nanoparticles. Also, using these data, crystallite size, dislocation density, micro-strain, stacking fault and lattice constant were calculated. The functional group associated with the vibration of a molecule was investigated by FTIR spectroscopy. The optical band gap was increased from 3.58 to 3.97 eV with increasing Ni dopant concentrations. The SEM and TEM images depict the nanosized particles with spherical shape morphology. The elemental composition of Ni-ZnS nanoparticles was examined by EDX analysis. The PL emission spectra show an intensity quenching upon Ni doping and exhibit green emission in the visible region. The photocatalytic activity results indicated that the Ni doping enhanced the photocatalytic activity of ZnS. Thus, Ni-ZnS could be effectively used as photocatalyst for degradation of environmental pollutant Methylene Blue dye.
机译：通过廉价的固态反应方法制备了纯的和Ni（0.5-2.0％）掺杂的ZnS纳米颗粒。通过XRD，FT-IR，UV-Vis，PL，SEM，EDX和TEM分析对产物的结构，功能，光学，形态和化学组成进行了表征。 X射线衍射结果证实了纳米颗粒具有立方晶体结构的多晶性质。另外，使用这些数据，计算出微晶尺寸，位错密度，微应变，堆垛层错和晶格常数。通过FTIR光谱研究了与分子振动相关的官能团。随着Ni掺杂剂浓度的增加，光学带隙从3.58eV增加到3.97eV。 SEM和TEM图像描绘了具有球形形态的纳米级颗粒。通过EDX分析检查了Ni-ZnS纳米颗粒的元素组成。 PL发射光谱显示出在掺杂Ni时的强度猝灭并且在可见光区域中显示绿色发射。光催化活性结果表明，Ni掺杂增强了ZnS的光催化活性。因此，Ni-ZnS可以有效地用作降解环境污染物亚甲基蓝染料的光催化剂。

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