Naaz Farha, Farooq Umar, Khan M A Majeed, Ahmad Tokeer
Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia.
ACS Omega. 2020 Sep 30;5(40):26063-26076. doi: 10.1021/acsomega.0c03584. eCollection 2020 Oct 13.
Highly crystalline and monophasic silver nanospheres with a high specific surface area of 57 m/g have been synthesized by an environmentally benign rapid chemical reduction using l-alanine for catalytic transformation, photocatalytic degradation, and bacterial disinfection, which can provide an ample strategy for water remediation. Electron microscopic analysis confirms the spherical morphology of as-prepared silver nanoparticles with an average grain size of 20 nm. Silver nanospheres showed excellent catalytic activity for the catalytic hydrogenation and conversion (95.6%) of 4-nitrophenol to 4-aminophenol. Significant photocatalytic degradation proficiency was also shown for methylene blue (94.5%) and rhodamine B (96.3%) dyes under solar irradiation. The antibacterial behavior of Ala-Ag nanospheres was demonstrated through the disk diffusion antibacterial assay against Gram-positive () and Gram-negative () bacteria. Multifunctional efficiency of as-prepared Ala-Ag nanospheres for water remediation has also been established.
通过使用L-丙氨酸进行环境友好的快速化学还原反应，合成了具有57 m²/g高比表面积的高度结晶且单相的银纳米球，用于催化转化、光催化降解和细菌消毒，这可为水修复提供丰富的策略。电子显微镜分析证实了所制备的银纳米颗粒的球形形态，平均粒径为20 nm。银纳米球对4-硝基苯酚催化加氢转化为4-氨基苯酚表现出优异的催化活性（95.6%）。在太阳辐射下，对亚甲基蓝（94.5%）和罗丹明B（96.3%）染料也表现出显著的光催化降解能力。通过对革兰氏阳性菌（）和革兰氏阴性菌（）的纸片扩散抗菌试验，证明了丙氨酸-银纳米球的抗菌性能。所制备的丙氨酸-银纳米球用于水修复的多功能效率也已得到证实。
