Cu_(2)O纳米微晶玻璃的显微结构及性能研究

Microstructure and Properties of Glass-Ceramics Containing Cu_(2)O Nanocrystallines

新型Cu_(2)O纳米微晶玻璃具有高Cu载量、低成本和易大规模制备等特点,有望成为载银抗菌玻璃较有潜力的替代者。通过采用XRD、Raman光谱、XPS、FESEM和TEM等表征方法重点研究了不同ZnO/K_(2)O比对SiO_(2)-Al_(2)O_(3)-K_(2)O-ZnO-P_(2)O_(5)-B_(2)O_(3)-CuO微晶玻璃显微结构的影响,并分析讨论了其结构-性能关系。结果表明,微晶玻璃中Zn与P元素会富集在Cu元素所在区域的附近,适量的ZnO能使微晶玻璃中析出的Cu_(2)O晶粒尺寸稳定在纳米级别,并能调节微晶玻璃中Cu元素的浸出速率。Cu_(2)O纳米微晶玻璃对大肠杆菌和金黄色葡萄球菌均具有显著的抗菌效果,并能实现对维多利亚蓝B溶液的可见光催化降解,是一种极具发展潜力的新型功能微晶玻璃材料。

Novel glass-ceramics containing Cu_(2)O nanocrystallines with features of high Cu loading amount,low cost and easy large scale production is a potential substitute for silver loaded antibacterial glass.In this study,SiO_(2)-Al_(2)O_(3)-K_(2)O-ZnO-P_(2)O_(5)-B_(2)O_(3)-CuO glass-ceramics with different ZnO/K_(2)O were investigated.Their microstructures were characterized by XRD,Raman spectroscopy,XPS,FESEM and TEM.The structure-performance relationship was also discussed.The results indicate that there is an enrichment of Zn and P elements around the region where Cu element locates in the glassceramics.An appropriate amount of ZnO makes sure the particles size of Cu_(2)O crystallines precipitated in glass-ceramics be in nano-scale and regulate the leaching rate of Cu element.Glass-ceramics containing Cu_(2)O nanocrystallines exhibit significant antibacterial effects on Escherichia coli and Staphylococcus aureus.They also show photocatalysis activity for degradation of Victoria blue B solution under visible light.It should be a novel functional glass-ceramics material with great potential.