Co_(3)O_(4)/GO复合材料的制备及其对Pb2+和Cd2+的电化学检测  

Preparation of Co_(3)O_(4)/GO composite material and the electrochemical detection of Pb^(2+) and Cd^(2+)

作　　者：郝亚超 张崇 王文涛 王晶 陈书航 徐宏妍[1] HAO Yachao;ZHANG Chong;WANG Wentao;WANG Jing;CHEN Shuhang;XU Hongyan(School of Materials Science and Engineering, The North University of China, Taiyuan 030051, China)

机构地区：[1]中北大学材料科学与工程学院,太原030051

出　　处：《功能材料》2022年第1期1190-1195,共6页Journal of Functional Materials

基　　金：国家自然科学基金项目(62071432);山西省自然科学基金项目(201901D111175)。

摘　　要：通过简单的水热-热分解法制备了Co_(3)O_(4)/GO复合材料,利用场发射扫描电子显微镜(FESEM)、X射线衍射(XRD)、傅里叶红外光谱(FT-IR)、拉曼光谱(Raman)对样品进行结构形貌表征。将制备的Co_(3)O_(4)/GO复合材料作为电极修饰材料构建电化学传感器对溶液中的Pb^(2+)和Cd^(2+)进行检测,测试采用差分脉冲阳极溶出伏安法(DPASV)的电化学检测方法。结果表明,Co_(3)O_(4)/GO复合材料中的Co_(3)O_(4)颗粒沿着GO平面生长并延伸成表面多孔的复合纳米片,这种多孔的复合纳米片结构可以提供更多的反应活性位点,对Pb^(2+)和Cd^(2+)的检测限分别为38和48 nmol/L。同时基于Co_(3)O_(4)/GO复合材料的电化学传感电极具有良好的稳定性、重复性和抗干扰性,在重金属电化学检测方面具有广阔的应用前景。The Co_(3)O_(4)/GO composite material is prepared by a simple hydrothermal-thermal decomposition method,and the morphological characterization and structure of sample are characterized by field emission scanning electron microscopy(FESEM),X-ray diffraction(XRD),Fourier Transform infrared spectroscopy(FTIR),and Raman spectroscopy(Raman).The prepared Co_(3)O_(4)/GO composite material is used as the electrode modification material to construct an electrochemical sensor to detect Pb^(2+)and Cd^(2+)in the solution.The test adopts the electrochemical detection method of differential pulse anodic stripping voltammetry(DPASV).The results show that the Co_(3)O_(4) particles in the Co_(3)O_(4)/GO composite grow along the GO plane and extend into composite nano-sheets with porous surfaces.This porous composite nano-sheet structure can provide more reactive sites.The detection limits of Pb^(2+)and Cd^(2+)are 38 and 48 nmol/L,respectively.At the same time,the electrochemical sensing electrode based on the Co_(3)O_(4)/GO composite material has good stability,repeatability and anti-interference,and has broad application prospects in the electrochemical detection of heavy metals.

关 键 词：重金属离子 电化学检测 Co_(3)O_(4)/GO 

分 类 号：X830.2[环境科学与工程—环境工程]