▎ 摘　　要

Hollow nanostructures have been diversely applied in many fields and efforts have been made to develop their various synthesis methodologies. Herein, homogeneous hollow Cu2-xSeyS1-y/reduced graphene oxide (rGO) nanocomposites were prepared for the first time via a facile and green aqueous chemical approach using H2S gas bubble templates as soft templates at room temperature. It is found that 2D hexagonal Cu2-xSeyS1-y nanosheets assemble around the gas-liquid interface of H2S bubbles to form hollow nanospheres on the rGO sheets, wherein rGO sheets as molecular templates play a critical role in maintaining the structural integrity of single-crystal hollow Cu2-xSeyS1-y nanospheres. Increasing the S content in the precursors, i.e., increasing the amount of H2S bubbles, both the diameter and chalcogen composition (S/Se molar ratio) of hollow Cu2-xSeyS1-y/rGO nanocomposites gradually increase. The near-infrared (NIR) localized surface plasmon resonance (LSPR) in Cu2-xSeyS1-y/rGO nanocomposites, arising from the free carriers (holes) in Cu2-xSeyS1-y, gets red shifts with increasing the S content, due to the higher carrier mass and assembly degree of Cu2-xSeyS1-y.