化学还原石墨烯/MXene泡沫膜的制备及其在压力传感器中的应用

Reduced Graphene Oxide/MXene Foams and Their Application as Pressure Sensor

本文以氧化石墨烯溶液与MXene溶液为主要原料,通过混合、抽滤、冷冻干燥,还原等步骤制得了不同质量比的化学还原石墨烯(rGO)/MXene泡沫膜;利用X射线衍射仪、场发射扫描电镜、X射线光电子能谱仪和电化学工作站对其微观结构以及压力传感性能进行了表征。结果表明,MXene的加入使得石墨烯内部堆叠的纳米片相互连接更为紧密,在氧化石墨烯与MXene质量比在5:1时,所制备的rGO/MXene泡沫膜展现出了优异的传感性能,具有极高的灵敏度和较快的响应时间(289 ms),可以捕获低于200 Pa压力产生的信号,具有较宽的压力测量范围。对其进行1000次施压和释放的循环,证实其具有良好的循环稳定性。

In this work,reduced graphene oxide(rGO)/MXene foams are synthesized by mixing the graphene oxide(GO)solution and MXene solution together at different weight ratios,followed with the procedures of suction filtration,freeze-drying,and reduction.The microstructure and pressure sensing performance of the as-prepared foams were characterized by scanning electron microscopy,X-ray photoelectron spectroscopy and electrochemical workstation,etc.The results show that the nanosheets of reduced graphene oxide stack more tightly with the addition of MXene nanosheets.When the mixing weight ratio of graphene oxide to MXene is 5:1,the rGO/MXene foam exhibits the optimal sensing performance as well as high sensitivity.It can capture generated signals from a wide pressure range even below 200 Pa pressure with a fast response speed(289 ms).Moreover,more than 1000 times pressure apply and release cycles are employed on the rGO/MXene foams,indicating excellent cycle stability.