基于Au@Ag NPs/TiO_(2)的比率型光电化学传感器用于H_(2)S检测  

Ratiometric Photoelectrochemical Sensor Based on Au@Ag NPs/TiO_(2) for H_(2)S Detection

作　　者：卢涛 LU Tao(College of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学化学化工学院,湖北武汉430062

出　　处：《安徽化工》2025年第1期35-38,43,共5页Anhui Chemical Industry

基　　金：波谱与原子分子物理国家重点实验室课题。

摘　　要：光电化学传感具有灵敏度高、操作简单、成本低以及生物相容性好等优点,在生物分析领域具有良好的应用前景。基于Au@Ag NPs/TiO_(2)构建了比率型光电化学(PEC)传感器,实现了对硫化氢(H_(2)S)的高灵敏和高选择性检测。在该传感器中,通过400 nm和660 nm激光分别激发TiO_(2)和Au@Ag产生光电流信号。当存在H_(2)S时,形成Au@Ag2S/TiO_(2)异质结,电子转移方向和光电流信号比值I660/I400发生变化,从而实现对H_(2)S的检测。比率型传感策略的开发,有效保证了PEC检测的可靠性,为PEC传感器在研究H_(2)S产生机制的病理过程中提供了新思路。Photoelectrochemical sensing has the advantages of high sensitivity,simple operation,low cost,and good bio⁃compatibility,and has good application prospects in the field of biological analysis.In this work,a ratiometric photoelectro⁃chemical(PEC)sensor was constructed based on Au@Ag NPs/TiO_(2) to achieve highly sensitive and selective detection of hy⁃drogen sulfide(H_(2)S).In the proposed sensor,TiO_(2) and Au@Ag are excited by 400 nm and 660 nm lasers,respectively,to generate photocurrent signals.In the presence of H_(2)S,an Au@Ag2S/TiO_(2) heterojunction is formed,and the electron transfer direction and the photocurrent signal ratio I660/I400 change,thus realizing the detection of H_(2)S.The development of ratiometric sensing strategy effectively ensures the reliability of PEC detection,and provides a new idea for PEC sensors to study the pathological process of H_(2)S generation mechanism.

关 键 词：光电化学传感 比率型 硫化氢 

分 类 号：O657[理学—分析化学]