We describe a facile method for preparing porous gold nanoparticle (Au-NP)/2H-form MoS2 nanocomposites. The Au-NPs were formed by redox reactions between 2-dimensional MoS2 nanoflakes with a 2H-form crystal structure and tetrachloroauric acid (HAuCl4) in a water/ethanol mixture without adding any additional reducing agents. The structures of the Au-NP/MoS2 nanocomposites were influenced by the molar ratio of the Au ion precursor and MoS2, as well as the volume ratio of water and ethanol in the reaction mixture. Ethanol allowed the 2H-MoS2 nanoflakes to maintain their original morphologies after the reaction to serve as the support framework, meanwhile the Au-NPs worked as a junction to construct a 3-dimensional (3D) nanoporous structure. The obtained porous nanocomposites worked as a material for surface enhanced Raman spectroscopy (SERS) due to the formation of many nanoholes with so-called "hot-spots" based on the assembled Au-NPs.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)