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首页> 外文期刊>Journal of nano research >The effect of incorporation of hydrocarbon groups on visible photoluminescence of thermally treated fumed silica
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The effect of incorporation of hydrocarbon groups on visible photoluminescence of thermally treated fumed silica

机译：烃基的掺入对热处理气相法二氧化硅可见光致发光的影响

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摘要

Methyl, methoxy and alcoxy groups with different number of carbon atoms were chemically grafted onto the surface of fumed silica nanoparticles. After chemical modification the nanopowders were annealed in vacuum at 700 degrees C. The effect of the amount of carbon atoms in grafted hydrocarbon groups and type of bonding to silica surface (Si-C v.s. Si-O-C) were studied. It was demonstrated that carbon incorporation results in the development of broad band photoluminescence that covers the whole visible spectral range. Increasing of carbon incorporation resulted in the increase of photoluminescence intensity and in the red shift of the photoluminescence band maximum.
机译：将具有不同碳原子数的甲基，甲氧基和烷氧基化学接枝到气相二氧化硅纳米颗粒的表面。化学修饰后，纳米粉体在700摄氏度的真空中退火。研究了接枝烃基中碳原子数量的影响以及与二氧化硅表面键合类型的影响（Si-C与Si-O-C）。结果表明，碳的引入导致了覆盖整个可见光谱范围的宽带光致发​​光的发展。碳掺入的增加导致光致发光强度的增加和光致发光带最大值的红移。

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