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壳聚糖包覆介孔二氧化硅纳米微球的制备及其对铜离子的吸附
Preparation of Mesoporous Silica Coated with Chitosan and their Adsorption Behaviour for Cu2+
【摘要】 通过溶胶-凝胶法制备了介孔二氧化硅纳米微球(MSN),再将天然高分子壳聚糖(CS)接枝到MSN表面,得到介孔二氧化硅@壳聚糖(MSN@CS)微球,进一步利用海藻酸钠与壳聚糖的静电吸引作用制得介孔二氧化硅@壳聚糖-海藻酸(MSN@CS-Alg)微球.利用SEM、Zeta电位分析仪以及TGA等手段对其结构和化学性质进行表征,并检测了MSN、MSN@CS和MSN@CS-Alg对铜离子(Cu2+)的吸附效果.实验结果表明,MSN@CS对Cu2+吸附效果最好,最大吸附量为14.59 mg·g-1.
【Abstract】 Mesoporous silica nanosphere(MSN) was prepared by sol-gel method.Then the natural polymer chitosan(CS) was grafted onto the surface of MSN to obtain mesoporous silica nanosphere @ chitosan(MSN@CS).Further,the mesoporous silica nanosphere @ chitosan-alginate(MSN@CS-Alg) was further prepared by electrostatic attraction of sodium alginate and chitosan.Its structure and chemical properties were characterized by means of SEM,Zeta potential analyzer and TGA.And the adsorption effects of MSN,MSN@CS and MSN@CS-Alg on copper ions(Cu2+) were compared and analyzed.The experimental results showed that MSN@CS had the best adsorption ability on Cu2+ and the maximum adsorption capacity was 14.59 mg·g-1.
【Key words】 mesoporous silica; chitosan; sodium alginate; Cu2+; adsorption;
- 【文献出处】 福建师范大学学报(自然科学版) ,Journal of Fujian Normal University(Natural Science Edition) , 编辑部邮箱 ,2019年06期
- 【分类号】TB383.1;O647.3;X703
- 【被引频次】5
- 【下载频次】1000