摘要
采用改进的hummer法制备出氧化石墨烯,再与适量的环糊精溶液以及水合肼和氨水进行还原反应得到环糊精-氧化石墨烯复合材料,测定了复合材料在不同pH、时间、温度等条件下对水体中的Cu^(2+)的吸附量。结果表明,环糊精-石墨烯复合材料对水溶液中的Cu^(2+)具有优异的吸附性能,在中性条件下,经24 h后吸附量达212.44 mg/g,吸附率为83.46%;这主要是因为氧化石墨烯的巨大表面积和表面含氧基团对Cu^(2+)的静电吸引力,以及环糊精的空腔结构所致。
The graphene oxide(GO) was prepared by a modified hummer ’s method and then reacted with a proper amount of cyclodextrin solution, hydrazine hydrate and ammonia water to obtain a cyclodextrin/GO composite. The amounts of adsorption of the composite for Cu^2+ were measured at different pH values, time and temperatures. The results indicated that the cyclodextrin/GO composite exhibited an excellent adsorption capability to Cu^2+ in aqueous solutions, and its adsorption capacity reached 212.44 mg/g after 24 h under the neutral condition, presenting the adsorption efficiency of 83.46 %. Such a result was mainly due to the large surface area of the graphene oxide and the electrostatic attraction of the surface oxygen-containing groups to Cu2+ as well as the cavity structure of cyclodextrin.
作者
邹静
王芳辉
杨艳丽
马少华
ZOU Jing;WANG Fanghui;YANG Yanli;MA Shaohua(Shaanxi Institute of Technology, Xi'an 710300, China;College of Science,Beijing University of Chemical Technology,Beijing 100029, China)
出处
《中国塑料》
CAS
CSCD
北大核心
2019年第4期17-21,共5页
China Plastics
基金
陕西省教育厅专项科研计划项目(17JK0066)
关键词
环糊精
氧化石墨烯
吸附性能
复合材料
cyclodextrin
graphene oxide
adsorption property
composite