摘要
采用工艺简单的水相合成法制备ZnS∶Mn量子点,并在量子点表面进行硅烷化处理,包覆一层分子印迹聚合物。将量子点与壳聚糖混合,在石英玻片上沉积,制备杂化膜,并用于4-硝基苯酚的快速测定,线性范围为1.0～8.0!mol/L;检出限为41nmol/L。此膜表现出较好的灵敏度和良好的选择性。此杂化膜具有良好的稳定性、重复使用性和可逆再生性,在无水乙醇中浸泡即可实现再生。本方法用于环境样品中4-对硝基苯酚的测定,回收率为95.5%～103.0%。
Mn-doped ZnS quantum dots （QDs） capped by a molecularly imprinted polymer （MIP） were synthesized, then QDs and chitosan were mixed, and the hybrid membrane was fabricated onto the quartz surface. A fast, sensitive and selective method was established to detect trace 4-nitrophenol （4-NP） based on the fluorescence quenching of hybrid membrane by 4-NP. In addition, a good linear relationship between fluorescence response and concentration of 4-NP could be obtained in the range from 1.0 to 8. be regenerated the recoveries 0 μmol/L, the detec by immersing into e can fall in the range tion limit was 41 nmol/L. The hybrid membrane is stable and can thanol. The method was also used in the real water samples, and of 95.5%-103.0%.
出处
《分析化学》
SCIE
CAS
CSCD
北大核心
2012年第9期1391-1396,共6页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金(Nos.20955001
21175049)
福建省自然科学基金(No.2011J01049)
教育部留学回国人员科研启动基金资助项目
关键词
量子点
表面分子印迹
4-硝基苯酚
壳聚糖
荧光识别
Quantum dots
Surface molecular imprinting
4-Nitrophenol
Chitosan
Fluorescencerecognition
