Synthesis of Ultrathin Co3O4 Nanoflakes Film Material for Electrochemical Sensing

本文以电沉积的金属钴薄膜作为原材料，通过简单的氧化技术获得了薄膜前驱体材料，并进一步在350 oC热处理条件下获得了超薄Co3O4纳米片薄膜材料. 通过扫描电镜（SEM），X-射线衍射（XRD），透射电镜（TEM）等手段对材料的物理结构进行了深入分析，并通过循环伏安法（CV）表征了该薄膜材料的电化学活性. 作为电化学传感器件的活性材料，该薄膜材料对H2O2的检测表现出较宽的线性浓度检测范围（0 ~ 4 mmol•L-1）和较高的电流响应(~ 1.15 mA•cm-2)，在该领域具有较高的应用价值.Ultrathin cobalt oxide (Co3O4 ) nanoflakes film material was synthesized by using an electro-deposited cobalt layer as a raw material through a simple oxidation method and followed by a heat treatment at 350 oC. The physical characterizations of the Co3O4  nanoflakes film were performed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM) technologies, and the electrochemical activity was measured by cyclic voltammetry (CV). As a promising material for electrochemical sensing, the as-synthesized ultrathin Co3O4  nanoflakes film material exhibited excellent electrochemical activity for H2O2 with a wide linear detection range （0 ~ 4 mmol•L-1） and high sensitive current response (~ 1.15 mA•cm-2).河北省自然科学基金项目（B2015203350）和秦皇岛市科技支撑计划项目（201602A004）资助作者联系地址：1. 电气工程学院 燕山大学，秦皇岛 066004；2. 河北省应用化学重点实验室 燕山大学，秦皇岛 066004Author's Address: 1.College of Electrical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China; 2. Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, Hebei, China.通讯作者E-mail：hjwang120@126.co