Fe_2O_3-CNT/rGO复合材料制备及其对亚硝酸盐的电化学性能

Synthesis of Fe_2O_3-CNTs/rGO Composite Materials and Their Electrochemical Properties for Nitrite

采用油浴水解反应法和退火还原法合成氧化铁-碳纳米管/还原氧化石墨烯(Fe_2O_3-CNT/rGO)复合材料。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线衍射(XRD)对Fe_2O_3-CNT/rGO复合材料的微观形貌、组成和晶体结构进行了分析和表征。同时,利用循环伏安法和计时安培滴定法对制备的Fe_2O_3-CNT/rGO电化学传感器对亚硝酸盐的电化学性能进行测试。实验结果表明:制备的Fe_2O_3-CNT/rGO电化学传感器对亚硝酸盐具有较高的灵敏度(0.679μA·μM^(-1)·cm^(-2))、较快的响应时间(3 s)、较低的检测限(0.08μM)、较宽的线性检测范围(0.2～13 000μM)和较强的抗干扰能力。

The ferric oxide-carbon nanotubes/reduced graphene oxide(Fe2O3-CNTs/rGO)composite materials were synthesized by oil bath hydrolysis reaction method and annealing reduction method.The morphology,composition and crystal structure of the Fe2O3-CNTs/rGO composite materials were analyzed and characterized by scanning electron microscope(SEM),transmission electron microscope(TEM)and X-ray diffraction(XRD).Meanwhile,the electrochemical properties of a prepared Fe2O3-CNTs/rGO electrochemical sensor for nitrite were tested by cyclic voltammetry and timing amperometry titration.The experimental results show that the as-prepared Fe2O3-CNTs/rGO electrochemical sensor exhibits high sensitivity(0.679μA·μM-1·cm-2),short response time(3 s),low detection limit(0.08μM),large linear detection range(0.2~13 000μM)and good anti-interference ability.