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首页> 外文期刊>Materials science & engineering >Structural, optical and antibacterial investigation of La, Cu dual doped ZnO nanoparticles prepared by co-precipitation method
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Structural, optical and antibacterial investigation of La, Cu dual doped ZnO nanoparticles prepared by co-precipitation method

机译：共沉淀法制备的La，Cu双掺杂ZnO纳米粒子的结构，光学和抗菌研究

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摘要

La, Cu dual doped ZnO with Cu = 0%-4% were prepared by co-precipitation route. The XRD pattern optimized the Cu content as 2% which restrict the secondary phase formation. The new phase at 38.7 degrees corresponding to CuO (111) and the another phase at 42.3 degrees related to Zn (101) came from un-reacted Zn2+ ions appeared in Cu = 4% doped sample. Zeta potential measurements confirms the stability of the particles. The blue shift of absorption edge and the energy gap from 3.66 eV to 3.99 eV by Cu doping was discussed by the shape of the particles, the distortion of the host lattice and generation of defect concentrations. The characteristic IR peaks around 470-489 cm(-1) was related to the octahedral sites of Zn-O for Cu = O and 2% which is shifted to 616 cm(-1) corresponding to the tetrahedral site at Cu = 4%. The shift in frequency was originated from the dissimilarity in the volume and bond lengths by the substitution of La and Cu in Zn-O. Based on the antibacterial report, it can be concluded that the Cu-doped Zn-La-O solid solution compose an effectual antimicrobial agent against pathogenic microorganisms. Cu = 4% doped sample possessed highest bacterial killing capacity because of the enhanced crystallite size and high density of oxygen vacancies which led the higher ROS values. Tuning of crystallite size and energy gap and the enhanced bactericial killing capacity by Cu addition is useful for optoelectronic device and medical applications.
机译：采用共沉淀法制备了Cu = 0％-4％的La，Cu双掺杂ZnO。 XRD图谱将Cu含量优化为2％，从而限制了第二相的形成。与CuO（111）对应的38.7度新相和与Zn（101）对应的42.3度新相来自未反应的Zn2 +离子出现在Cu = 4％掺杂样品中。 Zeta电势测量证实了颗粒的稳定性。通过粒子的形状，主体晶格的畸变和缺陷浓度的产生，讨论了Cu掺杂引起的吸收边的蓝移和能隙从3.66 eV到3.99 eV。 470-489 cm（-1）附近的特征IR峰与Cu = O和2％的Zn-O的八面体位有关，移至616 cm（-1）对应于Cu = 4％的四面体位。频率的变化是由于在Zn-O中置换La和Cu引起的，其体积和键长不同。根据抗菌报告，可以得出结论，Cu掺杂的Zn-La-O固溶体组成了一种有效的抗病原微生物的抗菌剂。 Cu = 4％掺杂的样品具有最高的细菌杀灭能力，这是由于增加了微晶尺寸和高密度的氧空位，导致较高的ROS值。通过添加铜来调节微晶尺寸和能隙以及增强的杀细菌能力对于光电器件和医疗应用是有用的。

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