Method for preparing narrow-band red fluorescent carbon quantum dots by using titanyl phthalocyanine

The invention discloses a method for preparing narrow-band red fluorescent carbon quantum dots by using titanyl phthalocyanine, particularly relates to red light carbon quantum dots with narrow full width at half maximum of a fluorescence emission peak, and belongs to the technical field of nano material preparation. The method comprises the following steps: (1) mixing titanyl phthalocyanine witha solvent, putting an obtained mixture into a reaction kettle, putting the reaction kettle into an oven, and keeping the temperature at 175-225 DEG C for 4 hours or longer to obtain a reaction product; and (2) naturally cooling the reaction product in the step (1) to room temperature to obtain the red light carbon quantum dot. The preparation process disclosed by the invention is simple and controllable, and the synthesized red light carbon quantum dots are narrow in fluorescence peak full width at half maximum and high in fluorescence quantum yield, and can be widely applied to the fields ofdisplay devices, cell labe