Method for solid-phase synthesis of high-quality fluorescent carbon dots in air by taking mesoporous molecular sieve as template

The invention provides a method for solid-phase synthesis of high-quality fluorescent carbon dots in air by taking a mesoporous molecular sieve as a template, which comprises the following steps: by taking small organic molecules as a single carbon source and the mesoporous molecular sieve as the template, filling the carbon source into pore channels of the molecular sieve by an impregnation method, directly heating and reacting in the air for a plurality of hours cooling, extracting and eluting with water, ethanol or other solvents, and collecting the product carbon dots. The synthesis method is simple, convenient and rapid, does not need solvent and high-pressure reaction conditions, is high in safety, and is suitable for preparing carbon dots with highly consistent size, morphology, composition structure, property and function on a large scale. Lewis acid catalysis sites are arranged in the molecular sieve, so that high yield can be realized in a very short time; and meanwhile, the molecular sieve has good