▎ 摘　　要

Graphene (GR)-wrapped rose-like Bi2O2CO3 (WBGR) core-shell structures are synthesized to maximize their contact area and quantum efficiency. The Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) results indicate that C-Bi bonds are formed, leading to a close chemical interfacial connection between Bi2O2CO3 and GR, as well as a concurrent red shift at the absorption edge (lambda = 430 nm). More importantly, an ultrafast electron transfer process (