Karimi Ziba, Shamsipur Mojtaba, Tabrizi Mahmoud Amouzadeh, Rostamnia Sadegh
Department of Chemistry, Payame Noor University, 19395-3697 Tehran, Iran.
Department of Analytical Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran.
Anal Biochem. 2018 May 1;548:32-37. doi: 10.1016/j.ab.2018.01.033. Epub 2018 Feb 21.
In this study, a novel electrochemical sensor for the determination of methanol based on palladium nanoparticles supported on Santa barbara amorphous-15- PrNHEtNH (PdNPs@SBA-15-PrEn) as nanocatalysis platform is presented. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and electrochemical methods are employed to characterize the PdNPs@SBA-15-PrEn nanocomposite. The Nafion-Pd@SBA-15-PrEn modified glassy carbon electrode (Nafion-PdNPs@SBA-15-PrEn/GCE) displayed the high electrochemical activity and excellent catalytic characteristic for electro-oxidation of methanol in an alkaline solution. The electro-oxidation performance of the proposed sensor was investigated using cyclic voltammetry (CV) and amperometry. The sensor exhibits a good sensitivity of 0.0905 Amol Lcm, linear range of 20-1000 μM and the corresponding detection limit of 12 μM (3σ). The results demonstrate that the Nafion-PdNPs@SBA-15-PrEn/GCE has potential as an efficient and integrated sensor for methanol detection.
在本研究中，提出了一种基于负载在圣巴巴拉无定形-15-丙基乙二胺（PdNPs@SBA-15-PrEn）上的钯纳米颗粒作为纳米催化平台来测定甲醇的新型电化学传感器。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）和电化学方法对PdNPs@SBA-15-PrEn纳米复合材料进行表征。Nafion-Pd@SBA-15-PrEn修饰玻碳电极（Nafion-PdNPs@SBA-15-PrEn/GCE）在碱性溶液中对甲醇的电氧化表现出高电化学活性和优异的催化特性。使用循环伏安法（CV）和安培法研究了所提出传感器的电氧化性能。该传感器具有0.0905 Amol Lcm的良好灵敏度、20 - 1000 μM的线性范围以及12 μM（3σ）的相应检测限。结果表明，Nafion-PdNPs@SBA-15-PrEn/GCE作为一种用于甲醇检测的高效集成传感器具有潜力。
