Abstract

Cobalt oxide nanoparticles are of great interest in recent years due to their potential applications. As very less work on synthesizing nanoparticles by microwave-assisted method, an attempt is made to synthesize cobalt oxide nanoparticles with zirconium doped at various weight % by the microwave-assisted method. The effect of doping on the Physico-chemical properties is reported. The result of P-XRD confirms the crystalline nature and the calculated average crystallite sizes were 12.29 nm, 11.95 nm, 11.06 nm, and 7.65 nm for 5, 10, 15, and 20 wt% of Zr doped Co₃O₄ nanoparticles respectively. The decrease in crystallite size is due to the occupation of the zirconium atoms at the vacant sites. The functional groups were identified by the FTIR spectrum. The UV-DRS spectra show the good optical transmission property of the samples and also indicate the decrease in bandgap with an increase in the concentrations of zirconium. The SEM pictures depict the morphological changes due to the agglomeration of zirconium particles. The SAED pattern in TEM images confirms the occupation of zirconium in cobalt oxide. The result of antibacterial activities indicates that the 20 wt% zirconium doped cobalt oxide nanoparticles display better activity.

摘要

近年来，氧化钴纳米颗粒因其潜在的应用而备受关注。由于微波辅助法合成纳米粒子的工作很少，因此尝试通过微波辅助法合成掺杂不同重量百分比的锆的氧化钴纳米粒子。报道了掺杂对物理化学性质的影响。P-XRD 的结果证实了晶体性质，对于 5、10、15 和 20 wt% 的 Zr 掺杂的 Co ₃ O _{4 ，计算的平均微晶尺寸为 12.29 nm、11.95 nm、11.06 nm 和 7.65 nm}分别为纳米粒子。微晶尺寸的减小是由于锆原子占据了空位。官能团由 FTIR 光谱鉴定。UV-DRS光谱表明样品具有良好的光学透射特性，并且还表明带隙随着锆浓度的增加而减小。SEM 照片描绘了由于锆颗粒的团聚引起的形态变化。TEM 图像中的 SAED 图案证实了锆在氧化钴中的占据。抗菌活性的结果表明，20 wt%锆掺杂的氧化钴纳米粒子表现出更好的活性。