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Traditional filters are faced with the problems of high price and complex preparation process. It is necessary to find a new method or material to make up for these shortcomings. In this Letter, C s P b B r 3 nanocrystals with controllable size were prepared in a tellurite glass matrix by a simple and effective heat treatment process. The absorption wavelength of C s P b B r 3 quantum dots gradually shifted to red due to the quantum confinement effect. In addition, the intrinsic photoluminescence intensity of C s P b B r 3 quantum dots was reduced by C e 4 + -doped quantum dot C s P b B r 3 glass, which could shield a short wavelength of 200–530 nm. The uniformly distributed quantum dots ensure high transmittance ( > 80 % ) of a long wavelength (560–800 nm), demonstrating that the quantum dot glass material has a broad application prospect as a shortwave shielding material.

So far, the application of inorganic glass materials in the field of photocatalysis has not been explored. First, phase separation induced CsPbBr3 quantum dot glasses, as an unprecedented method, is proposed in this work. The results show that the fluorescence intensity of quantum dots (QDs) glass is increased by 1.5 times compared with the initial intensity after the thermal cycle, showing excellent thermal stabilities. Furthermore, the quantum dots glass material is used for the first time in antibiotic residues degradation. The concentration of TC-HCl in 20 mg/L is degraded by 73% in 1 h, and the photocatalytic efficiency reaches 85% of the initial value after three cycles, revealing favorable water stabilities. In this paper, quantum dot glass material breaks the inherent thinking of the preparation methods, and it explores the feasibility application in fields of photocatalyst and brings unexpected changes to the application of glass material in the future.