小中大【求助】制备mpg-C3N4的问题
我采用如下方法，制备g-C3N4，经过焙烧后，得到的是白色固体，可文献上说得到的是黄色固体，怎么回事？
5 g of cyanamide and 12.5 g of Ludox-HSO4 silica dispersion are mixed together
until complete dissolution of cyanamide. The mixture is heated in an oil bath at 100 oC upon stirring for
ca .3h until removal of water and formation of a white solid. The powder is then grounded in a mortar,
transferred into a crucible and heated under air at 2.3 oC min-1 (4h) up to 550 oC and then treated at 550
oC for 4h. The as-obtained yellow powder is grounded in a mortar and then treated under stirring during 2
days in a NH4HF2 4 mol L-1 solution.
