Department of Chemistry, Semnan University, Semnan, Iran.
Department of Chemistry, Faculty of Science, Golestan University, Gorgan, P.O. Box: 155, Iran.
Int J Biol Macromol. 2021 Apr 30;177:83-91. doi: 10.1016/j.ijbiomac.2021.02.068. Epub 2021 Feb 10.
New chitosan Schiff base (3EtO-4OH/Chit) and its 3EtO-4OH/Chit/FeO nanocomposite were synthesized and characterized by FTIR, H NMR, XRD, TGA, DSC and SEM. The result confirmed the preparation of 3EtO-4OH/Chit and its 3EtO-4OH/Chit/FeO nanocomposite. The efficiency of the prepared catalysts was studied for the methyl orange (MO) removal from aqueous solution. The effect of adsorbent dose and contact time on the removal of dye has been studied. Their antibacterial activities were considered against two Gram positive (S. aureus and B. cereus) and two Gram negative (E. coli and P. aeruginosa) bacteria and the results showed that the activity of the 3EtO-4OH/Chit/FeO is excellent and is more than chitosan and 3EtO-4OH/Chit. Thermogravimetry studies shows that the weight loss stages and the residual value at 600 °C are different for the two compounds. DSC curve of the title compounds 3EtO-4OH/Chit and 3EtO-4OH/Chit/FeO is different from each other. The reason for this difference could be due to the presence of iron oxide nanoparticles in 3EtO-4OH/Chit/FeO.
新壳聚糖席夫碱（3EtO-4OH/Chit）及其 3EtO-4OH/Chit/FeO 纳米复合材料通过 FTIR、H NMR、XRD、TGA、DSC 和 SEM 进行了合成和表征。结果证实了 3EtO-4OH/Chit 和其 3EtO-4OH/Chit/FeO 纳米复合材料的制备。研究了制备催化剂对水溶液中甲基橙（MO）去除的效率。研究了吸附剂剂量和接触时间对染料去除的影响。还考虑了它们对两种革兰氏阳性菌（金黄色葡萄球菌和蜡状芽孢杆菌）和两种革兰氏阴性菌（大肠杆菌和铜绿假单胞菌）的抗菌活性，结果表明 3EtO-4OH/Chit/FeO 的活性非常出色，超过了壳聚糖和 3EtO-4OH/Chit。热重研究表明，两种化合物的失重阶段和在 600°C 时的残余值不同。标题化合物 3EtO-4OH/Chit 和 3EtO-4OH/Chit/FeO 的 DSC 曲线彼此不同。这种差异的原因可能是由于 3EtO-4OH/Chit/FeO 中存在氧化铁纳米粒子。
