采用水热法合成氧化铁-石墨烯/二硫化钼(Fe_2O_3-rGO/MoS_2)复合材料。使用X射线衍射(XRD)和扫描电子显微镜(SEM)分别对复合材料的晶体结构和微观形貌进行分析和表征。测试结果表明Fe_2O_3均匀掺杂在rGO/MoS_2复合材料中。同时,利用循环伏安法和安培滴定法对制备的Fe_2O_3-rGO/MoS_2电化学传感器的电化学性能进行测试。实验结果表明:制备的Fe_2O_3-rGO/MoS_2电化学传感器,在对亚硝酸盐检测时,其灵敏度可达0.378μA·μM~-1·cm~(-2)(1 M=1 mol/L),检出限为0.2μmol/L(信噪比为3)且具有较宽的检测范围(1.0~9 830μmol/L)和较强的抗干扰性。 Ferric oxide - graphene / molybdenum disulfide (Fe_2O_3-rGO / MoS_2) composites were synthesized by hydrothermal method. The crystal structure and microstructure of the composites were analyzed and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The test results show that Fe 2 O 3 is uniformly doped in rGO / MoS 2 composites. At the same time, the electrochemical performance of the Fe_2O_3-rGO / MoS_2 electrochemical sensor was tested by cyclic voltammetry and amperometric titration. The experimental results show that the sensitivities of Fe 2 O 3 -rGO / MoS 2 electrochemical sensors can reach 0.378 μA · μM -1 · cm -2 (1 M = 1 mol / L) when detecting nitrite, , The detection limit was 0.2μmol / L (signal to noise ratio of 3) and has a wide detection range (1.0 ~ 9 830μmol / L) and strong anti-interference.