| 초록 |
MXenes, two-dimensional metal carbides/nitrides, are attracting great attention due to their high conductivity and various surface functional groups compared to other 2D materials, especially in gas sensing applications. Despite their excellent properties, methods to enhance adsorption and interaction of gas molecules on the surface of MXene require further development as existing methods are rather complicated and difficult. Here, we report a simple and cost-efficient method to tune the gas sensing properties of MXenes, and studied the influence of acidic, neutral, and basic additives. Ti3C2 MXene aqueous solutions were treated with either bases, neutral salts, or acids with similar cations and anions, which were then coated on a gas sensing electrode. We show that while pristine MXene without any intercalants show very little reactivity to the gas sensor, MXene treated with bases shows high sensitivity. In particular, the gas response was greatest in MXene treated with KOH. |
