摘要
以自组装在金电极上的L-半胱胺酸(L-cys)为基底沉积普鲁士蓝(PB),滴加氨基硅烷(APTES)后固定纳米金(Nano-Au),结合血红蛋白(HB),利用PB和HB对过氧化氢(H_2O_2)的催化作用,制备了H_2O_2传感器。该修饰电极在H_2O_2浓度为4.0×10^(-8)~1.0×10^(-5)mol/L范围内与电流有线性响应,线性相关系数R=0.998 0。实验证明,HB/Nano-Au/APTES/L-cys@PB修饰电极显著提高了传感器的灵敏度,增强了稳定性,拓宽了线性响应范围并降低了检测下限。
An amperometric biosensor for the detection of H_2O_2 was developed.The system was based on(3-mercaptorpropyl) trime-thoxysilane coat the prussian blue deposited @ L-cystine-modified electrode to merge hemoglobin with nano-Au.The biosensor showed a specific response to H_2O_2 in the range 4.0×10-8 to 1.0×10-5mol/L by CV.Both prussian blue and hemoglobin exhibited excellent electrocatalytical properties toward the reduction of H_2O_2 to amplify the amperometric signal,which enhanced the sensitivity of the biosensor and stability.
出处
《西北大学学报(自然科学版)》
CAS
CSCD
北大核心
2016年第2期213-217,共5页
Journal of Northwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(51102200)
陕西省教育厅基金资助项目(2013JK0748)