One-step synthesis of low-dimensional copper-based nanomaterials with intrinsic antioxidant properties

Abstract

Copper nanomaterials have remarkable application potential in electronic devices, catalysis, biological materials, and other fields, but their easy oxidation characteristics have become a problem in their practical application. Many antioxidant technologies have been developed. However, these technologies are usually accompanied by changes in physicochemical properties, complicated operations, and high costs. Here, we describe a method for simultaneously achieving controllable morphology synthesis and antioxidative preparation of copper nanomaterials through a single solvothermal reaction in a polar organic solvent environment with formate groups. The stability of one-step copper nanomaterials in different environments is monitored and compared with traditional copper nanomaterials. Notably, the two-dimensional copper nanomaterial Cu NSs-FA prepared by one-step method has a low initial resistance of 48 × 10−3 Ω/sq, and the resistance only rises to 221 × 10−3 Ω/sq after treatment in a harsh alkaline environment for 12 h, which is comparable to that of ordinary Cu NSs (379 ×10−3 Ω/sq). The ratio reflects good environmental stability. This antioxidation strategy, which is suitable for a variety of copper nanomaterials, is simple to operate and has low cost, showing broad prospects in the practical application of copper nanomaterials.