CDs/SiO2复合荧光粉的制备与优化
Design of CDs/SiO2 Composite Phosphors
DOI: 10.12677/ms.2026.162037, PDF,    科研立项经费支持
作者: 刘 杨, 王 睿, 张 蕾, 孙明烨*：牡丹江师范学院物理与电子工程学院，黑龙江 牡丹江
关键词: 碳点；固态发光；二氧化硅；溶胶凝胶法；聚乙烯吡咯烷酮；CDs； Solid-State Luminescence； SiO2； Sol-Gel Method； PVP
摘要: 本文研究思路如下，采用溶剂热法制成多色碳点(CDs)，采用溶胶–凝胶法制备出碳点–二氧化硅(CDs/SiO2)复合荧光粉。另外，为了优化CDs/SiO2复合荧光粉的发光强度，引入了聚乙烯吡咯烷酮(PVP)作为表面活性剂，通过正硅酸乙酯(TEOS)的水解缩合反应，将CDs嵌入SiO2基质中。PVP的引入有效调控了复合荧光粉的微观结构和界面特性，其分子链上的C=O、C-N等官能团不仅能通过空间位阻效应防止碳点团聚，更能与硅羟基前驱体形成强氢键，引导SiO2在CDs表面进行异相成核与生长，显著抑制了TEOS的均相成核现象。
Abstract: The research methodology is as follows: Multicolor carbon dots (CDs) were synthesized via a solvothermal method. CDs/SiO2 composite phosphors were subsequently prepared using a sol-gel process. Furthermore, to enhance the luminescence intensity of the CDs/SiO2 composite phosphors, polyvinylpyrrolidone (PVP) was introduced as a surfactant. Through the hydrolysis and condensation of tetraethyl orthosilicate (TEOS), the CDs were embedded within the SiO2 matrix. The incorporation of PVP effectively regulates the microstructure and interfacial properties of the composite. The functional groups such as C=O and C-N on the PVP molecular chains not only prevent the aggregation of CDs via steric hindrance but also form strong hydrogen bonds with the silanol precursors. This interaction guides the heterogeneous nucleation and growth of SiO2 on the CD surfaces, significantly suppressing the homogeneous nucleation of TEOS.
文章引用：刘杨, 王睿, 张蕾, 孙明烨. CDs/SiO2复合荧光粉的制备与优化[J]. 材料科学, 2026, 16(2): 183-192. https://doi.org/10.12677/ms.2026.162037

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