Organic-inorganic composite long afterglow material as well as preparation method and application thereof

The invention belongs to the technical field of long-afterglow materials, and particularly relates to an organic-inorganic composite long-afterglow material as well as a preparation method and application thereof. The organic-inorganic composite long afterglow material is prepared by taking a polycarboxylic acid aromatic hydrocarbon compound as an organic guest and an indissolvable inorganic salt as a matrix through co-doping of the guest and the matrix, the polycarboxylic acid aromatic hydrocarbon compound at least contains two carboxylic acid functional groups, such as hexasulfonic acid, nutmeg tetracarboxylic acid, benzene hexacarboxylic acid, naphthalene dicarboxylic acid and the like; the inorganic matrix is an indissolvable inorganic salt prepared by double decomposition reaction, such as calcium carbonate, barium sulfate and the like; and the mass dosage of the inorganic matrix is 102-105 times of the mass of the organic object. The composite long-afterglow material has excellent long-afterglow lumines