基于CdSe/ZnS量子点和黑磷的组胺分子印迹聚合物的合成及性能评价

Study on synthesis and adsorption properties of histamine molecular imprinted polymers based on CdSe/ZnS quantum dots and black phosphorus

在室温下通过一步聚合法,在反相微乳液体系中合成了一种新型的基于黑磷和量子点结合分子印迹技术的荧光传感材料(BPS-QDs@MIP),其中黒磷是一种新型的优于石墨烯的二维半导体材料。该聚合物以组胺为模板,以3-氨丙基三乙氧基硅烷(APTES)为功能单体,以四乙氧基硅烷(TEOS)为交联剂而合成的。通过扫描电镜和红外光谱表征表明,本实验成功地合成了新型的荧光分子印迹聚合物,结构均一,球形分布。与荧光非印迹聚合物相比,显示出了较高的模板选择性和特异性吸附性。在最佳浓度条件下,荧光分子印迹传感材料随着组胺浓度的增加,荧光强度呈现线性增强,组胺的线性范围为0.10~20 mg/L,相关系数为0.99,方法的检出限为0.019 mg/L。当组胺浓度为10 mg/L时,重复3次,方法的RSD为2.0%。

At room temperature, a novel molecular imprinted fluorescent sensing material based on black phosphorus and quantum dots was synthesized by one-step polymerization method in reverse microemulsion system, in which histamine was used as template, 3-aminopropyl triethoxysilane （APTES） as functional monomer and tetraethoxysilane （TEOS） as crosslinker. The shape and structure of the synthesized fluorescent sensing material were characterized by SEM and FTIR. The fluorescent molecularly imprinted polymers were successfully synthesized with uniform structure and spherical distribution, and characterized by scanning electron microscopy and infrared spectroscopy. The absorption performance was systematically studied. The results showed that compared with the fluorescent non-imprinted polymer, the new fluorescent molecularly imprinted polymer had higher selectivity to the target molecule. Under the optimum concentration, fluorescence intensity of the fluorescent molecularly imprinted sensing material increased with the concentration of molecules. The fluorescence intensity was linearly enhanced with a range of 0. 10 -20 mg/L, with the detection limit of 0. 019 mg/L, and the correlation coefficient was 0.99. When the concentration of histamine was 10 mg/L, the RSD of this method was 2.0% for three repeated experiments.