The solid-phase reaction method usu

The solid-phase reaction method usually selects a compound with a triazine ring structure such as melamine and melamine chloride as a precursor, and then adds a nitrogen-containing compound as a nitrogen source, and causes the two to react under higher temperature and pressure. Carbon nitride powder was obtained. In 2000, Khabashesku et al. Used cyanuric chloride as a precursor and lithium nitride as a nitrogen source. Under the protection of a nitrogen atmosphere, they reacted at 300-380 ° C for 0.5-4 hours to obtain an amorphous C3N4 product. In addition, they added melamine fluoride to the raw materials and changed the solid-phase reaction conditions to obtain a hollow spherical structure of amorphous C3N4 with a C / N ratio of 0.8. Zhang et al. Used melamine instead of lithium nitride to perform solid-phase reaction with melamine chloride under the conditions of 1-1.5GPa and 500-600 ℃, and successfully obtained g-C3N4 with better crystallinity.