Here, we report for the first time the synthesis of new composite Ag-NPs-loaded core/shell mixed oxides NPs, CdO/Co₃O₄. First, nano-precursors (1) and (2) consist of mixed (cadmium oxalate/cobalt oxalate) and (silver oxalate/cadmium oxalate/cobalt oxalate), respectively, have been synthesized and characterized. Then, thermal treatment of 1 and 2 at 400 °C resulted in the formation of composites CdO/Co₃O₄ (3) and Ag-NPs@CdO/Co₃O₄ (4), respectively. The materials have been characterized by IR, SEM, TEM, TGA and XRD. The morphologies of the materials were described from SEM images. TEM images revealing the formation of core–shell structure with average particles size 5–20 nm. The crystal sizes were calculated from XRD patterns and resulted in 14.21, 14.65, 15.06 and 15.79 nm for 1, 2, 3 and 4, respectively. All the materials undergo tests as antibacterial agents against Gram-positive bacteria (Bacillus subtilis and Enterococcus spp.) and Gram-negative bacteria (E. coli and Pseudomonas aeruginosa). Precursor 2 and composite 4 impart higher inhibition against all the bacterial strains compared to precursor 1 and composite 3.

在这里，我们首次报告了新的复合Ag-NPs负载的核/壳混合氧化物NPs，CdO / Co ₃ O ₄的合成。首先，已分别合成和表征了由混合的（草酸镉/草酸钴）和（草酸银/草酸镉/草酸钴）组成的纳米前体（1）和（2）。然后，在400°C下热处理1和2导致形成复合材料CdO / Co ₃ O ₄（3）和Ag-NPs @ CdO / Co ₃ O ₄（4）分别。通过IR，SEM，TEM，TGA和XRD对材料进行了表征。从SEM图像描述了材料的形态。TEM图像揭示了核-壳结构的形成，平均粒径为5-20 nm。由XRD图计算晶体尺寸，分别得到1、2、3和4的14.21、14.65、15.06和15.79nm。所有材料均经过了针对革兰氏阳性菌（枯草芽孢杆菌和肠球菌属）和革兰氏阴性菌（大肠杆菌和铜绿假单胞菌）的抗菌剂测试。与前体1和复合物3相比，前体2和复合物4对所有细菌菌株具有更高的抑制作用。