缺陷石墨烯的可控制备及其室温湿敏性能

利用活泼的金属钠还原廉价的糖类，成功实现了一种缺陷石墨烯的可控制备，该石墨烯材料在室温下表现出极佳的湿敏性能. 表征结果显示:蔗糖前驱体使石墨烯片层厚度增加到0.4 nm，并改变缺陷石墨烯表面的修饰基团及缺陷含量(摩尔分数). 蔗糖前驱体制备的缺陷石墨烯，其表面含氧基团的摩尔分数可达24.2%. 不同缺陷含量的石墨烯样品室温湿敏性能表现不同. 相比不加糖类的石墨烯样品，蔗糖前驱体制备的缺陷石墨烯室温湿敏性能最高可提升4.5倍. 研究结果可为石墨烯基材料在室温气敏探测方面的应用提供技术参考.

The Controllable Synthesis of Defect Graphene and Its Humidity-sensing Property at Room Temperature

Controllable preparation of defect graphene was successfully realized by reducing cheap sugars with active metal sodium. The graphene material showed excellent humidity sensitivity at room temperature. The characte-rization results showed that the addition of sugars increased the thickness of graphene to 0.4 nm and changed the surface modification groups of the defective graphene and their content(mole ratio). The mole ratio of oxygen-containing groups on the surface of defect graphene prepared with the sucrose precursor is up to 24.2%. The humidity sensitivity of graphene samples with different defect contents at room temperature varies. Compared with the samples without sugar, the room-temperature humidity sensitivity of the defective graphene prepared with the sucrose precursor can be improved by 4.5 times. This study can provide technical reference for the application of graphene-based materials to room-temperature gas sensing.