Jeung Do-Gak, Lee Minseop, Paek Seung-Min, Oh Jae-Min
Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 04620, Korea.
Department of Chemistry, Kyungpook National University, Daegu 41566, Korea.
Nanomaterials (Basel). 2021 Feb 11;11(2):455. doi: 10.3390/nano11020455.
Silver oxide nanoparticles with controlled particle size were successfully obtained utilizing citrate-intercalated layered double hydroxide (LDH) as a substrate and Ag as a precursor. The lattice of LDH was partially dissolved during the reaction by Ag. The released hydroxyl and citrate acted as a reactant in crystal growth and a size controlling capping agent, respectively. X-ray diffraction, X-ray photoelectron spectroscopy, and microscopic measurements clearly showed the development of nano-sized silver oxide particles on the LDH surface. The particle size, homogeneity and purity of silver oxide were influenced by the stoichiometric ratio of Ag/Al. At the lowest silver ratio, the particle size was the smallest, while the chemical purity was the highest. X-ray photoelectron spectroscopy and UV-vis spectroscopy results suggested that the high Ag/Al ratio tended to produce silver oxide with a complex silver environment. The small particle size and homogeneous distribution of silver oxide showed advantages in antibacterial efficacy compared with bulk silver oxide. LDH with an appropriate ratio could be utilized as a substrate to grow silver oxide nanoparticles with controlled size with effective antibacterial performance.
利用柠檬酸盐插层的层状双氢氧化物（LDH）作为基底、Ag作为前驱体，成功获得了粒径可控的氧化银纳米颗粒。在反应过程中，LDH的晶格被Ag部分溶解。释放出的羟基和柠檬酸盐分别在晶体生长中作为反应物和尺寸控制封端剂。X射线衍射、X射线光电子能谱和显微镜测量清楚地表明了在LDH表面形成了纳米级氧化银颗粒。氧化银的粒径、均匀性和纯度受Ag/Al化学计量比的影响。在最低银比例下，粒径最小，而化学纯度最高。X射线光电子能谱和紫外-可见光谱结果表明，高Ag/Al比倾向于产生具有复杂银环境的氧化银。与块状氧化银相比，氧化银的小粒径和均匀分布在抗菌效果方面显示出优势。具有适当比例的LDH可作为基底，用于生长具有可控尺寸且具有有效抗菌性能的氧化银纳米颗粒。
