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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Surface properties of mesoporous silicate and alumino-silicate modified by reaction with benzoyl chloride
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Surface properties of mesoporous silicate and alumino-silicate modified by reaction with benzoyl chloride

机译：与苯甲酰氯反应改性的介孔硅酸盐和硅铝酸盐的表面性质

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摘要

The preparation of mesoporous silicate and alumino-silicate by different synthesis methods are reported together with their surface modi cation. Specific surface area of starting samples ranges between 400 and 1100 m(2)/g. Benzoyl chloride was used to graft the benzoyl group to the surface. FT-IR spectra of modified samples show a peak centred at 1705 cm(-1) assigned to the stretching vibration of carbonyl group of benzoic ester. The C-13 NMR spectra also clearly show the benzoyl groups attached at the surface. Modified samples show lower specific surface areas and pore volume with respect to the corresponding values for starting materials. The weight ratio between benzoyl and silica was also calculated by thermogravimetrical analysis. Mesoporous materials and their reactivity open new perspectives in the possibility of designing catalysts. [References: 19]
机译：据报道通过不同的合成方法制备介孔硅酸盐和铝硅酸盐及其表面改性。起始样品的比表面积在400到1100 m（2）/ g之间。苯甲酰氯用于将苯甲酰基接枝到表面上。改性样品的FT-IR光谱显示一个中心位于1705 cm（-1）的峰，该峰与苯甲酸酯的羰基的拉伸振动有关。 C-13 NMR光谱也清楚地显示了连接在表面的苯甲酰基。相对于起始材料的相应值，改性样品显示出较低的比表面积和孔体积。苯甲酰基和二氧化硅之间的重量比也通过热重分析来计算。介孔材料及其反应性为设计催化剂的可能性开辟了新的前景。 [参考：19]

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