▎ 摘　　要

Herein we report a high temperature and high pressure driven crystallization of two-dimensional graphene oxide (GO) nanosheets to three-dimensional diamond. The successful phase transformation was confirmed using X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The phase transition platform will available to utilize for a wide variety of diamond doping employing, for example, nitrogen or other light elements, in which the correspondingly doped GO is used as the starting material.