X射线光电子能谱
纳米颗粒
材料科学
抗菌活性
核化学
复合数
兴奋剂
化学工程
琼脂
纳米技术
化学
复合材料
光电子学
生物
细菌
工程类
遗传学
作者
Sai Kumar Tammina,Ruchir Priyadarshi,Jong‐Whan Rhim
出处
期刊:ACS applied bio materials
[American Chemical Society]
日期:2023-11-10
卷期号:6 (11): 4728-4739
被引量:4
标识
DOI:10.1021/acsabm.3c00514
摘要
SnO2 and Zn-SnO2 nanoparticles were prepared by chemical precipitation, and the rutile phase of SnO2 was confirmed through X-ray diffraction studies. X-ray photoelectron spectroscopy (XPS) confirmed the doping of SnO2 with Zn and elucidated the surface chemistry before and after doping. The average sizes of SnO2 and Zn-SnO2 nanoparticles determined using TEM were 3.96 ± 0.85 and 3.72 ± 0.9 nm, respectively. UV–visible and photoluminescence spectrophotometry were used to evaluate the optical properties of SnO2 and Zn-SnO2 nanoparticles, and their energy gaps (Eg) were 3.8 and 3.9 eV, respectively. The antibacterial activity of these nanoparticles against Salmonella enterica and Staphylococcus aureus was evaluated under dark and light conditions. Antibacterial activity was higher in light, showing the highest activity (99.5%) against S. enterica. Carboxymethylcellulose (CMC)/agar-based functional composite films were prepared by adding different amounts of SnO2 and Zn-SnO2 nanoparticles (1 and 3 wt % of polymers). The composite film showed significantly increased UV barrier properties while maintaining the mechanical properties, water vapor barrier, and transparency compared to the neat CMC/agar film. These composite films showed significant antibacterial activity; however, the Zn-SnO2-added film showed stronger antibacterial activity (99.2%) than the SnO2-added film (15%).
科研通智能强力驱动
Strongly Powered by AbleSci AI