高效催化剂在推进生态友好型水处理战略方面发挥着关键作用,特别是在去除水-石油来源中发现的各种有机污染物。这项研究解决了污染物带来的多方面挑战,包括一系列重金属,如砷,Cd,Cr,Mn,Mo,Ni,Pb,Sb,Se,和锌以及油水(OIW)等污染物,总悬浮固体(TSS),化学需氧量(COD),染料,和药物,对水生和陆地生态系统都构成威胁。在这里,我们介绍了生物衍生的Mn@NiO纳米复合材料(NC)光催化剂的合成,采用迷迭香水性提取物的可持续方法,产生颗粒的大小为36.7nm。该催化剂在去除重金属方面表现出非凡的功效,在30分钟内实现超过99-100%的速率,除了显著的OIW去除效率(98%)之外,TSS(87%),COD(98%)。此外,我们的光降解实验显示出显著的效率,在120分钟内,玫瑰红(RB)的降解率为94%,亚甲基蓝(MB)的降解率为96%。降解动力学坚持伪一级行为,RB的速率常数为0.0227min-1,MB的速率常数为0.0370min-1。此外,对于头孢氨苄(CEX)和阿莫西林(AMOX),NC表现出明显的抗生素降解率为97%。增强的光催化性能归因于Mn和NiO纳米结构之间的协同相互作用,增强对阳光的响应,同时减轻电子-空穴对复合。值得注意的是,催化剂在多个循环中表现出出色的稳定性和可重用性,保持其稳定的纳米结构不妥协。
Efficient catalysts play a pivotal role in advancing eco-friendly water treatment strategies, particularly in the removal of diverse organic contaminants found in water-petroleum sources. This study addresses the multifaceted challenges posed by contaminants, encompassing a spectrum of heavy metals such as As, Cd, Cr, Mn, Mo, Ni, Pb, Sb, Se, and Zn alongside pollutants like oily water (OIW), total suspended solids (TSS), chemical oxygen demand (COD), dyes, and pharmaceuticals, posing threats to both aquatic and terrestrial ecosystems. Herein, we present the synthesis of biogenically derived Mn@NiO nanocomposite (NC) photocatalysts, a sustainable methodology employing an aqueous Rosmarinus officinalis L. extract, yielding particles with a size of 36.7 nm. The catalyst demonstrates exceptional efficacy in removing heavy metals, achieving rates exceeding 99-100% within 30 min, alongside notable removal efficiencies for OIW (98%), TSS (87%), and COD (98%). Furthermore, our photodegradation experiments showed remarkable efficiencies, with 94% degradation for Rose Bengal (RB) and 96% for methylene blue (MB) within 120 min. The degradation kinetics adhere to pseudo-first-order behavior, with rate constants of 0.0227 min-1 for RB and 0.0370 min-1 for MB. Additionally, the NC exhibits significant antibiotic degradation rates of 97% for cephalexin (CEX) and 96% for amoxicillin (AMOX). The enhanced photocatalytic performance is attributed to the synergistic interplay between the Mn and NiO nanostructures, augmenting responsiveness to sunlight while mitigating electron-hole pair recombination. Notably, the catalyst demonstrates outstanding stability and reusability across multiple cycles, maintaining its stable nanostructure without compromise.