Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
Int J Biol Macromol. 2016 Oct;91:744-51. doi: 10.1016/j.ijbiomac.2016.06.018. Epub 2016 Jun 7.
Chitosan/cobalt-silica (Co-MCM) nanocomposites were synthesized for the purification of effluent by adding 5, 15 and 25mL of Co-MCM solution to the aqueous chitosan solution for the formation of chitosan/Co-MCM-5, chitosan/Co-MCM-15 and chitosan/Co-MCM-25, respectively. These different nanocomposites were characterized by FESEM, EDS, X-ray crystallography and IR spectrophotometer and employed for the adsorption of various dyes (methyl orange, acridine orange, indigo carmine and congo red). The respective nanocomposites showed good adsorption toward methyl orange, indigo carmine and congo red while all nanocomposites were inactive for acridine orange dye. Among the nanocomposites, chitosan/Co-MCM-15 showed the highest adsorption performance which might be due to ideal dispersion of Co-MCM inside the chitosan polymer host. Chitosan/Co-MCM-15 exhibited high adsorption for methyl orange as compared to indigo carmine. We have further checked the biological potential of chitosan/Co-MCM nanocomposites against gram positive and negative bacteria as well as multi drug resistant bacteria. The results favor the strongest bioactivities of chitosan/Co-MCM-15 against various gram positive and gram negative bacteria as well as multi drug resistant bacteria, which further suggest the ideal dispersion of Co-MCM in chitosan polymer host and is responsible for the improvement of both adsorption as well as biological performance.
壳聚糖/钴-硅（Co-MCM）纳米复合材料通过向壳聚糖溶液中加入 5、15 和 25mL 的 Co-MCM 溶液，分别形成壳聚糖/Co-MCM-5、壳聚糖/Co-MCM-15 和壳聚糖/Co-MCM-25，用于废水的净化。这些不同的纳米复合材料通过 FESEM、EDS、X 射线晶体学和红外分光光度计进行了表征，并用于吸附各种染料（甲基橙、吖啶橙、靛蓝胭脂红和刚果红）。各个纳米复合材料对甲基橙、靛蓝胭脂红和刚果红表现出良好的吸附性，而所有纳米复合材料对吖啶橙染料均无活性。在纳米复合材料中，壳聚糖/Co-MCM-15 表现出最高的吸附性能，这可能是由于 Co-MCM 在壳聚糖聚合物主体中的理想分散。与靛蓝胭脂红相比，壳聚糖/Co-MCM-15 对甲基橙的吸附性能更高。我们进一步检查了壳聚糖/Co-MCM 纳米复合材料对革兰氏阳性和阴性细菌以及多药耐药菌的生物潜力。结果表明，壳聚糖/Co-MCM-15 对各种革兰氏阳性和革兰氏阴性细菌以及多药耐药菌具有最强的生物活性，这进一步表明 Co-MCM 在壳聚糖聚合物主体中的理想分散，并负责提高吸附和生物性能。
