β-环糊精固载于TiO_2纳米粒多孔膜的压电石英晶体传感器  

Development of piezoelectric quartz sensor with β-cyclodextrin and nanoporous TiO_2 films

作　　者：司士辉[1] 周光红[1] 陈昕[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《分析试验室》2003年第4期14-17,共4页Chinese Journal of Analysis Laboratory

基　　金：国家"863"计划项目(2001AA218041)

摘　　要：以TiO2纳米微粒膜作为固载β 环糊精的基体,实现了β 环糊精在压电石英晶体表面的高容量固载(4μg/cm2)。β 环糊精/TiO2纳米微粒膜修饰的压电传感器对邻、间、对硝基酚三种异构体具有选择性响应。在pH11,浓度范围0.6～20μmol/L内,其斜率分别是对硝基酚k=71.9HzL/μmol(γ=0.9974)、邻硝基酚49.1HzL/μmol(γ=0.9981)、间硝基酚2.8HzL/μmol(γ=0.9999)。通过多元线性回归法实现了3种异构体的同时测定。Immobilization of βcyclodextrin onto nanoporous TiO2 films was characterized by using piezoelectric crystal sensor and FTIR technique. The amount of immobilized βcyclodextrin on the surface of quartz crystal was estimated to be about 4 μg/cm2. βcyclodextrin modified piezoelectric crystal sensor had selective response to o,m,pnitrophenol, and the response slopes of frequency shift vs. concentration were found to be 719, 49.1, and 2.8 Hz L/μmoL for pnitrophenol, onitrophenol and mnitrophenol, respectively.

关 键 词：Β-环糊精 TiO2 纳米颗粒 多孔膜 压电传感器 石英晶体 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]