CAJ | 학술논문

以叶酸为碳源,采用水热法制备碳纳米盘,采用自还原法制备负载在碳纳米盘上的小尺寸银纳米颗粒。通过透射电子显微镜、X射线衍射实验、X射线光电子能谱对其形貌和晶面分布情况进行了表征。同时,将碳载小尺寸银纳米颗粒修饰到玻碳电极表面,构建了过氧化氢( H2 O2)无酶电化学传感器。电化学循环伏安法(CV)和计时电流法(i-t)的研究结果表明,本传感器对H2O2的还原具有电催化活性,响应时间为1.8 s,对H2O2的检出限为2.2μmol/L,线性范围为0.02~14 mmol/L (R=0.997)。此传感器可以避免抗坏血酸、多巴胺、尿酸、葡萄糖对检测的干扰,长时间使用较为稳定,实际尿样检测结果令人满意。
이협산위탄원,채용수열법제비탄납미반,채용자환원법제비부재재탄납미반상적소척촌은납미과립。통과투사전자현미경、X사선연사실험、X사선광전자능보대기형모화정면분포정황진행료표정。동시,장탄재소척촌은납미과립수식도파탄전겁표면,구건료과양화경( H2 O2)무매전화학전감기。전화학순배복안법(CV)화계시전류법(i-t)적연구결과표명,본전감기대H2O2적환원구유전최화활성,향응시간위1.8 s,대H2O2적검출한위2.2μmol/L,선성범위위0.02~14 mmol/L (R=0.997)。차전감기가이피면항배혈산、다파알、뇨산、포도당대검측적간우,장시간사용교위은정,실제뇨양검측결과령인만의。
Carbon nanoflakes were prepared by hydrothermal treatment using folic acid as carbon source, and then ultrafine silver nanoparticles were grown on the surface of carbon nanoflakes by self-reduction method. The materials were characterized by transmission electron microscopy ( TEM) , X-ray diffraction ( XRD) , and X-ray photoelectron spectroscopy ( XPS) . The carbon flakes supported Ag nanoparticles were used to construct electrochemical biosensor for the detection of hydrogen peroxide ( H2 O2 ) . The figures of cyclic voltammetry (CV) and chronoamperometry (i-t) revealed that the sensor had prominent electrocatalytic activity for the detection of hydrogen peroxide ( H2 O2 ) with a wide linear range from 0. 02 mmol/L to 14 mmol/L ( R=0. 997) and a rapid response time (1. 8 s) upon the addition of H2 O2 . The detection limit was estimated to be 2. 2 μmol/L. The sensor could avoid interference from ascorbic acid, dopamine, uric acid, glucose, and also showed good stability even during long use. The prepared sensor was successfully used in real samples analysis with satisfying results.