Facile, Sustainable, and Chemical-Additive-Free Synthesis of Monodisperse Carbon Spheres Assisted by External Pressure

Strict control of the size uniformity of carbon spheres is a prerequisite for many applications. However, there has been a long-standing challenge to design and synthesis of high-quality glucose-derived carbon spheres with outstanding size uniformity. In this Letter, we report a facile, sustainable, and chemical-additive-free method for the external pressure-assisted synthesis of monodisperse hydrothermal carbon spheres (MHCSs). The MHCSs obtained with the introduction of moderate pressure (2.0 MPa) exhibited good uniformity for carbon nanospheres (<100 nm) which can also be obtained by simply adjusting the external pressure.