Sulfur dioxide sensing properties of MOF-derived ZnFe2O4 functionalized with reduced graphene oxide at room temperature

• 作者: Lan-Juan Zhou Xi-Xi Zhang Wen-Yuan Zhang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: ADVANCED NANOMATERIALS FOR GAS AND HUMIDITY SENSORS
• 页码范围: 1604-1613
• 页数: 10页
• 语种: 英文

摘要

In this paper,ZnFe2O4 nanorods were prepared using Zn/Fe metal organic framework (MOF) as precur-sors,and ZnFe2O4/reduced graphene oxide (rGO) was prepared by hydrothermal method.The morphology and composition of the ZnFe2O4/rGO nanocomposite were characterized,and the results showed that the MOF-derived ZnFe2O4 nanorods are uniformly modified on the surface of rGO.The ZnFe2O4/rGO nanocomposite exhibits better SO2 gas sensing performance than the single ZnFe2O4 nanorods at room temperature.The sensing characteristics of single ZnFe2O4 film sensor,single rGO film sensor and ZnFe2O4/rGO composite film sensor at SO2 gas concen-tration (1 × 10-6-100 × 10-6) were tested.The response of ZnFe2O4/rGO composite sensor can reach 18.32％ at room temperature.Compared with single ZnFe2O4 and rGO film sensors,the ZnFe2O4/rGO composite sensor has better transient response,good sensitivity and selectivity.In this work,the improvement of the sensor performance is not only due to the p-n heterostructure between ZnFe2O4 nanorods and rGO nanosheets,but also to the excellent electrical properties of rGO.It provides a new idea for the detection of SO2 at room temperature.