Physical Chemistry Unit, Department of Chemistry, University of the Free State, Bloemfontein, South Africa.
Industrial/Physical Chemistry Unit, Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Nigeria.
Sci Rep. 2023 Jan 17;13(1):859. doi: 10.1038/s41598-023-28122-0.
Copper oxide nanoparticles (CuONPs) have received tremendous attention as efficient adsorbents owing to their low cost, desirable surface area, abundant active sites, potent textural characteristics and high adsorption capacities. However, CuONPs have not been employed to decontaminate water laden with increasing environmental contaminants such as thiazolyl blue and paracetamol. Herein, the adsorption of thiazolyl blue and paracetamol onto green synthesized CuONPs prepared from the aqueous leaf extract of Platanus occidentalis was studied. The BET, SEM, FTIR, XRD, EDX and pH point of zero charge showed the successful synthesis of CuONPs having desirable surface properties with a surface area of 58.76 m/g and an average size of 82.13 nm. The maximum monolayer adsorption capacities of 72.46 mg/g and 64.52 mg/g were obtained for thiazolyl blue and paracetamol, respectively. The Freundlich, pseudo-second-order and intraparticle diffusion models were well fitted to the adsorption of both pollutants. The pH studies suggested the predominance of electrostatic and weaker intermolecular interactions in the adsorption of the thiazolyl blue and paracetamol, respectively. Spontaneous, physical, endothermic and random adsorption of the pollutants on CuONPs was obtained from the thermodynamic consideration. The biosynthesized CuONPs were found to be highly reusable and efficient for the adsorption of thiazolyl blue and paracetamol from water.
氧化铜纳米粒子 (CuONPs) 因其成本低、比表面积大、丰富的活性位、强大的织构特性和高吸附能力而备受关注，是一种高效的吸附剂。然而，CuONPs 尚未用于去除水中不断增加的环境污染物，如噻唑蓝和扑热息痛。在此，研究了从悬铃木叶水提物中制备的绿色合成的 CuONPs 对噻唑蓝和扑热息痛的吸附作用。BET、SEM、FTIR、XRD、EDX 和 pH 零电荷点表明成功合成了具有理想表面特性的 CuONPs，比表面积为 58.76 m/g，平均粒径为 82.13 nm。噻唑蓝和扑热息痛的最大单层吸附容量分别为 72.46 mg/g 和 64.52 mg/g。Freundlich、准二级和内扩散模型很好地拟合了两种污染物的吸附。pH 研究表明，在吸附噻唑蓝和扑热息痛时，分别主要存在静电和较弱的分子间相互作用。从热力学考虑，污染物在 CuONPs 上的吸附是自发的、物理的、吸热的和随机的。从水中吸附噻唑蓝和扑热息痛时，发现生物合成的 CuONPs 具有很高的可重复使用性和效率。
