离子交换和热处理对贵金属掺杂硅酸盐玻璃光致发光的影响  

Influences of Ion Exchange and Thermal Treatment on Photoluminescence of Noble Metal Doped Silicate Glasses

作　　者：杨修春[1] YANG Xiu-Chun(Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineer- ing, Tongji University, Shanghai 201804, China)

机构地区：[1]同济大学材料科学与工程学院,先进土木工程材料教育部重点实验室,上海201804

出　　处：《无机材料学报》2016年第10期1039-1045,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金(50672069);上海纳米专项资金(11nm0500700)~~

摘　　要：贵金属纳米颗粒–玻璃复合材料是一种重要的非线性材料。利用光致发光谱及配位场理论,深入研究了离子交换及氢气热处理对硅酸盐玻璃中贵金属离子的引入、还原、成核及生长过程的影响,发现延长离子交换时间有利于提高玻璃中金属离子的浓度。对于掺Ag^+硅酸盐玻璃,不仅存在孤立Ag^+离子,同时也存在Ag^(2+)团簇。H_2中热处理后,样品中孤立Ag^+离子浓度迅速降低,同时出现Ag_3^(2+)团簇。对于掺Cu^+硅酸盐玻璃,仅存在孤立Cu^+和Cu^(2+),没有发现Cu^+团簇的发光峰,Cu^(2+)的存在造成Cu^+的发光强度显著降低。掺Ag^+硅酸盐玻璃经H_2热处理后,再经过第二次离子交换往玻璃中掺Cu^+是十分困难的。Noble metallic nanoparticles-glass composites have attracted much interest because of their technical potential as nonlinear media. In present work, the influences of ion-exchange and thermal treatment on the photo- luminescence of noble metal doped silicate glasses were discussed based on photoluminescence （PL） spectroscopy and ligand field theory. The results indicate that metallic ion concentration in silicate glass increases with extending ion-exchanged period. There exist isolated Ag＋ ions and Ag2＋ clusters in Ag-doped silicate glass. Concentration of the isolated Ag~ ions decreases quickly and Ag3^2＋ clusters appear after annealing the Ag-doped silicate glass in H2. While there exist only isolated Cu^＋ and Cu^2＋ ions in the Cu-doped silicate glass, no photoluminescence of Cu^＋ clus- ters are found in the glass. The existence of Cu^2＋ ions makes the luminescence of Cu quenching. It is very difficult to introduce Cu＋ ions into the annealed Ag-doped glass in HE via Cu^＋ for Na＋ ion-exchange.

关 键 词：离子交换 热处理 贵金属离子及团簇 光致发光 配位场理论 

分 类 号：TQ174[化学工程—陶瓷工业]