Ti3C2TX/Au@Pt纳米花复合膜的制备及其无酶H2O2传感器的应用

基于二维过渡金属碳化物(MXene)-Ti3C2Tx材料的导电性与Au@Pt纳米花的催化活性,组装了一种用于超灵敏和快速检测H2O2含量的Ti3C2Tx/Au@Pt纳米花无酶传感器。通过发射扫描电镜和X-射线衍射对制备的Ti3C2Tx进行表征。结果表明Ti3C2Tx材料表现出特有的手风琴结构,Ti3C2Tx/Au@Pt为以Au粒子为中心,Pt粒子环绕周围组成蒲公英状纳米球。研究了H2O2在Ti3C2Tx/Au@Pt纳米花修饰玻碳电极上的循环伏安曲线和时间电流曲线,结果显示该修饰电极检测H2O2具有线性范围良好(0.03~1100μmol/L)、灵敏度高(检出限可达0.02μmol/L)、抗干扰性和再现性好等优点。与传统滴定法相比,该新型无酶传感器能在复杂环境下快速准确检出H2O2含量。

Preparation of an Enzyme-free Ti3C2Tx/Au@Pt Nanoflowers Composite Sensor and Its Application in H2O2 Detection

Based on the conductivity of two-dimensional transition metal carbide(MXene)-Ti3C2Tx and catalytic activity of Au@Pt nanoflowers,a Ti3C2Tx/Au@Pt nanoflowers enzyme-free sensor was assembled for the ultrasensitive and rapid detection of H2O2 content.The prepared Ti3C2Tx was characterized by emission scanning electron microscopy and X-ray diffraction spectrometry.Results showed that the Ti3C2Tx material exhibited a unique accordion structure,while the Ti3C2Tx/Au@Pt are centered on Au particles and surrounded by Pt particles to form the surrouding dandelion structure.The cyclic voltammogram and time current curve of H2O2 on the Ti3C2Tx/Au@Pt modified electroded were studied.Results showed that the modified electrode presented good linear relationship for H2O2(0.03-1 100μmol/L),high sensitivity(detection limit:0.02μmol/L),good anti-interference and reproducibility.Compared with the traditional titration method,the new enzyme-free sensor could be more rapidly and accurately used in the detection of H2O2 in a complex environment.