▎ 摘　　要

NOVELTY - An inorganic photoluminescent material is a grey or white powder comprising 25-45 wt.%, preferably 28-42 wt.% boron, 1-20 wt.%, preferably 2-19 wt.% carbon present as single-layer graphene, 8-22 wt.%, preferably 10-20 wt.% nitrogen, and 30-50 wt.%, preferably 33-45 wt.% oxygen. USE - Inorganic photoluminescent material (claimed). ADVANTAGE - The inorganic photoluminescent material can be prepared by a simple method without radioactivity, is environmentally-friendly, and has high luminous intensity and brightness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of inorganic photoluminescent material, which involves weighing boric acid, urea, and graphene oxide such that the mass ratio of boric acid and urea is 1:8-16 and mass ratio of boric acid with respect to total content of urea and graphene oxide is 1-60:1, mixing the weighed materials, ultrasonically treating for 20-60 minutes at 40-60 W and 30-60 KHz, drying and dehydrating, steaming in an oven at 60-90 degrees C for 24-72 hours to obtain solid mixture, grinding into powder, roasting in a muffle furnace in air by heating at 10-15 degrees C/minute to 500-1000 degrees C, heat-preserving for 5-30 minutes, cooling to room temperature, and grinding into powder.