Silicate luminescent material and preparation method therefor

A method for preparing a silicate luminescent material, comprising:

• preparing collosol containing M, said M is selected from at least one of Ag, Au, Pt, Pd, and Cu metal nanoparticles;
• mixing said collosol containing M and silicon dioxide aerogel to obtain mixture solution, stirring said mixture solution and then sonicating and drying, grinding solid material obtained from drying, calcining said solid material at 600° C. to 1200° C. for 0.5 to 4 hours to obtain silicon dioxide aerogel containing M;
• selecting source compound of Li, source compound of Ca, source compound of Tb and said silicon dioxide aerogel containing M according to stoichiometric ratios of corresponding elements in general molecular formula of Li2Ca1-xSiO4:Tbx,My, mixing and grinding uniformly to form a mixture material, calcining said mixture material at 500° C. to 1000° C. for 2 to 15 hours, and reducing said mixture material at 800° C. to 1200° C. for 0.5 to 6 hours, cooling and grinding to obtain silicate luminescent material has a general molecular formula of Li2Ca1-xSiO4:Tbx,My, x is in a range of 0<x≦0.2, M is doped in said Li2Ca1-xSiO4:Tbx, and y is a molar ratio of M to Si and y is in a range of 0<y≦1×10−2.