Textile Materials and Processes Research Unit, Tunisia National Engineering School of Monastir, University of Monastir, Tunisia.
Department of Chemistry, College of Science Al-zulfi, Majmaah University, Al-Majmaah, 11952, Saudi Arabia; Textile Materials and Processes Research Unit, Tunisia National Engineering School of Monastir, University of Monastir, Tunisia.
Carbohydr Polym. 2021 Jun 1;261:117908. doi: 10.1016/j.carbpol.2021.117908. Epub 2021 Mar 5.
In this study, copper oxide nanoparticles, prepared using pistacia vera hull extract, were immobilized onto chitosan. FT-IR spectrum of copper oxide-chitosan exhibited chemical shifting of the main peaks of the biopolymer indicating that hydroxyl and amino groups were reacted with copper oxide nanoparticles. SEM features showed spherical surface and physical stability of the composite. The shifting of the burning temperature in DTA from 278.5 °C to 212.6 °C in the composite proved the interaction between chitosan and copper oxide nanoparticles. The composite was applied for the oxidative degradation of naphthol blue black in the presence of HO. The change of copper oxide nanoparticles loading, time, dye concentration, temperature, and oxidant dose were studied. The degradation yield reached 86 % (C = 30 mg/L, T=20 °C, HO = 8 mL/L). The activation energy (E), entropy (ΔS*) and enthalpy (ΔH*) were equal to 45.558 KJ. mol, -116.203 J mol K and 42.986 kJ mol, respectively.
在这项研究中，使用开心果壳提取物制备的氧化铜纳米粒子被固定在壳聚糖上。氧化铜-壳聚糖的 FT-IR 光谱显示了生物聚合物主要峰的化学位移，表明羟基和氨基与氧化铜纳米粒子发生了反应。SEM 特征显示了复合材料的球形表面和物理稳定性。在 DTA 中燃烧温度从 278.5°C 到 212.6°C 的偏移证明了壳聚糖和氧化铜纳米粒子之间的相互作用。在 HO 的存在下，该复合材料被用于萘酚蓝黑的氧化降解。研究了氧化铜纳米粒子负载量、时间、染料浓度、温度和氧化剂剂量的变化。降解率达到 86%（C = 30mg/L，T = 20°C，HO = 8mL/L）。活化能（E）、熵（ΔS*）和焓（ΔH*）分别为 45.558KJ·mol、-116.203J·mol K 和 42.986KJ·mol。
