【摘要】 以氧化石墨烯、异佛尔酮二异氰酸酯和β-环糊精为原料,制备了一种新型石墨烯/二异氰酸酯/环糊精复合材料。采用傅里叶红外光谱及扫描电子显微镜对材料进行了表征。该复合材料与铜离子作用后,可呈现特征的荧光信号。在试验条件下,Cu(Ⅱ)浓度在1.00~6.00mmol·L-1范围内与荧光强度呈线性关系,检出限(3S/N)为0.007 5mmol·L-1。方法用于测定水样中铜离子含量,加标回收率在96.3%~100%之间,测定值的相对标准偏差(n=6)小于4%。更多还原

【Abstract】 A novel graphene/diisocyanate/β-cyclodextrin composite was prepared with graphene oxide,isophorone diisocyanate andβ-cyclodextrin as raw materials.The composite was characterized by FT-IR and SEM.It was found that characteristic fluorescence signals were obtained upon its reaction with Cu(Ⅱ).Under optimum conditions,a linear relationship was found between values of fluorescence intensity and concentration of Cu(Ⅱ)in the range of 1.00-6.00mmol·L-1,with detection limit(3S/N)of 0.007 5mmol·L-1.The proposed method was applied to the determination of Cu(Ⅱ)in water,giving values of recovery in the range of 96.3%-100% and RSD′s(n=6)less than 4%.更多还原