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化衍生纳米材料影响粒子稳定性,催化和抗菌性能

Gaddi B Eshun¹, Francis J Osonga¹, Omowunmi A Sadik¹

¹Department of Chemistry and Environmental Science BioSMART Center, New Jersey Institute of Technology, University Heights, 151 Warren Street, Newark, New Jersey 07102, United States.

|September 23, 2024

概括

修改后的素被用来制造具有独特形状的纳米粒子 (PtNPs). 这些形状依赖的PtNP显示出对细菌的增强抗微生物活性和废水处理的催化特性.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
生物化学生物化学

背景情况:

奎尔素具有有益的生物特性,但具有较差的溶解性和生物可用性.
为了改善其应用,需要对奎尔丁进行结构性修改.
纳米粒子 (PtNPs) 由于其催化和抗菌潜力而引起人们的兴趣.

研究的目的:

通过使用修饰的素 (4'-QP) 合成形状依赖的纳米粒子 (PtNPs).
调查立方形 (C-PtNPs) 和花生形 (P-PtNPs) PtNPs对Citrobacter freundii的抗菌活性.
评估形状依赖的PtNP在减少4-尼托醇中的催化效率.

主要方法:

使用4'-QP作为降解剂和稳定剂合成PtNP的水性合成.
传输电子显微镜 (TEM) 用于PtNP大小和形状的表征.
阿格尔井扩散试验和抗菌活性最小抑制度 (MIC) 确定.
扫描电子显微镜 (SEM) 用于分析细菌细胞损伤.
使用 PtNPs 和酸的催化降解4-尼托芬醇.

主要成果:

单分散的C-PtNP (39.1 ± 0.20 nm) 和P-PtNP (45.1 ± 0.24 nm) 已成功合成.
与P-PtNP相比,C-PtNP对C. freundii具有显著更高的抗菌活性 (16.28±0.10毫米抑制区,25μg/mLMIC) 和P-PtNP (4.50±0.15毫米抑制区,45μg/mLMIC).
SEM分析显示了膜损伤,并建议C-PtNP的接触杀死机制.
与P-PtNP相比,C-PtNP表现出更高的催化活性 (k = 0.0108 s−1) 减少4-尼托醇,而P-PtNP则表现出更高的催化活性 (k = 0.00607 s−1).

结论:

使用改性奎尔丁合成的形状依赖PtNP显示出有前途的抗微生物和催化性能.
立方体PtNP对C. freundii具有增强的抗菌功效,可能是通过膜破坏.
在降解污染物中的PtNP的催化效率取决于形状,纳米立方体更有效.

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