Method for preparing carbon quantum dots by using bagasse as carbon source with chemical oxidation process

The invention belongs to the technical field of material synthesis, and discloses a method for preparing carbon quantum dots by using bagasse as a carbon source with a chemical oxidation process. Themethod comprises the following steps: high temperature carbonization is carried out for the bagasse at 300-700 DEG C for 2-7 hours, in order to obtain carbonized black solids, and the solids are grinded into black powder; the black powder is dispersed in acetic acid and 30wt% hydrogen peroxide, ultrasonic treatment is carried out, heating reflux is carried out at 100-140 DEG C for 6-24 hours, andcooling is carried out; the solution is filtered in order to remove impurities of large particles and solid substances which are not completely reacted; centrifugation is carried out at the rotation number of 4000-12000r/min for 10-60 minutes, dialysis of supernatant is carried out for 12-48 hours, and an aqueous solution of carbon quantum dots is obtained. The preparation process is simple, professional apparatus and equi