Institute of Chemical Sciences, University of Peshawar, Peshawar 25120, Pakistan.
Institute of Chemical Sciences, University of Peshawar, Peshawar 25120, Pakistan.
Int J Biol Macromol. 2018 May;111:832-838. doi: 10.1016/j.ijbiomac.2018.01.092. Epub 2018 Jan 31.
A new route to fabricate cotton cloth (CC) as easily removable substrate for the synthesis of copper nanoparticles on its surface and its utilization in a toxic dye reduction is reported herein. A 1 wt% chitosan (Chi) aqueous solution was prepared and coated onto CC surface to prepare the ions affinity Chi-CC material. The Chi-CC was then kept in copper sulphate solution with three different concentrations (0.05 M, 0.1 M and 0.2 M) to interact with Cu ions through -NH and -OH functional groups of the Chi chain. After sufficient time of the Cu uptake, the Chi-CC was treated with 0.1 M NaBH solution which turned its color indicating well organization of the adsorbed ions into Cu-nanoparticles. The bare CC, Chi-CC and Cu/Chi-CC were spectroscopically examined via scanning electron microscopy, X-ray diffractometry, energy dispersive X-ray spectroscopy and thermo-gravimetric analysis. Afterward, Cu/Chi-CC was used in the Congo red (CR) dye reduction by NaBH as catalyst. The performance of the amount of the catalyst and its usage in a series of similar dye reduction was evaluated.
本文报道了一种在棉织物（CC）表面合成铜纳米粒子的新方法，即将其用作易于去除的基底，并将其用于还原有毒染料。首先，制备了 1wt%壳聚糖（Chi）水溶液，并将其涂覆到 CC 表面，制备出对离子具有亲和性的 Chi-CC 材料。然后，将 Chi-CC 置于三种不同浓度（0.05M、0.1M 和 0.2M）的硫酸铜溶液中，通过 Chi 链上的-NH 和-OH 官能团与 Cu 离子相互作用。在充分吸收 Cu 离子后，用 0.1M 的 NaBH 溶液处理 Chi-CC，使其颜色发生变化，表明吸附离子已很好地组织成 Cu-纳米粒子。通过扫描电子显微镜、X 射线衍射、能谱和热重分析对裸 CC、Chi-CC 和 Cu/Chi-CC 进行了光谱分析。随后，Cu/Chi-CC 被用作 NaBH 还原刚果红（CR）染料的催化剂。评估了催化剂用量和在一系列类似染料还原中的使用性能。
