Abstract

Copper and copper oxide nanoparticles (Co/CoO NPs) were synthesized by a green approach using Syzygium cumini leaf extract. The formation of synthesized Co/CoO NPs was monitored by using UV–Visible spectroscopy which shows surface plasmon resonance (SPR) at 380 nm. The parameters affecting the particle size or yield of Co/CoO NPs including pH, temperature, reaction time, and concentration of salt also has been studied. The performance or efficiency of catalysts has been investigated by the degradation of 4-nitrophenol (4-NP) and methylene blue (MB) in the presence of sodium borohydride. The kinetic studies displayed that Co/CoO NPs obeyed pseudo-first-order for catalysis of selected contaminants.

摘要

使用Syzygium cumini叶提取物通过绿色方法合成了铜和氧化铜纳米颗粒（Co / CoO NPs）。合成的Co / CoO NP的形成通过使用紫外可见光谱法进行监测，该光谱显示了380 nm的表面等离振子共振（SPR）。还研究了影响Co / CoO NP粒径或收率的参数，包括pH，温度，反应时间和盐浓度。已经通过在硼氢化钠存在下降解4-硝基苯酚（4-NP）和亚甲基蓝（MB）来研究催化剂的性能或效率。动力学研究表明，Co / CoO NPs在选择的污染物催化过程中服从拟一阶反应。