CO2-Assisted Synthesis of 2D Amorphous MoO3-x Nanosheets: From Top-Down to Bottom-Up

Supercritical CO2 has shown great potential in the top-down fabrication of two-dimensional (2D) amorphous nanomaterials. However, a few works focus on the SC CO2-assisted synthesis of 2D amorphous nanomaterials by a bottom-up approach. Here we report the facile bottom-up synthesis of 2D amorphous MoO3-x nanosheets, using SC CO2 as a surface confining agent. Moreover, the morphology of the MoO3-x can be tailored by simply adjusting the pressure of the SC CO2 The as-prepared 2D amorphous MoO3-x nanosheets exhibit enhanced surface plasma resonance in the visible and near-infrared regions, showing outstanding photothermal conversion performance. This work constructs a new approach for the preparation of 2D amorphous nanosheets, throwing light on the amorphization mechanism of 2D materials.

Automated summary

This study reports the facile bottom-up synthesis of 2D amorphous MoO3-x nanosheets using supercritical CO2 as a surface confining agent, with morphology tailored by adjusting pressure and enhanced surface plasma resonance exhibited. The prepared nanosheets show outstanding photothermal conversion performance, providing insights into the amorphization mechanism of 2D materials.