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首页> 外文期刊>Catalysis science & technology >One-pot synthesis of ordered mesoporous zirconium oxophosphate with high thermostability and acidic properties
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One-pot synthesis of ordered mesoporous zirconium oxophosphate with high thermostability and acidic properties

机译：具有高温稳定性和酸性特性的有序中孔紫磷酸锆的一锅合成

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摘要

A series of mesoporous zirconium oxophosphate (M-ZrPO) with different P/Zr molar ratios (0-1.25) has been prepared via a facile one-pot evaporation-induced self-assembly (EISA) strategy. After removing the structure-directing agents, the M-ZrPO with large specific surface area (160 m~2 g~(-1)), big pore volume (0.26 cm~3 g~(-1)) and narrow pore size distribution (5.64 nm) has been obtained. Small-angle X-ray diffraction (SXRD) and transmission electron microscopy (TEM) results showed that these materials had ordered mesoporous structure. With the increase of P/Zr, the textural properties of M-ZrPO could be improved. Moreover, the ordered mesostructure could be maintained even when treated at 800 °C, indicating the M-ZrPO had attractive thermal stability. NH3-TPD and pyridine-IR analyses showed the presence of abundant Bronsted and Lewis acid sites in the material. The M-ZrPO has been used successfully as solid acid catalyst and showed excellent performance in the ketalization reaction.
机译：一系列具有不同P/ZR摩尔比（0-1.25）的介孔锆（M-ZRPO）是通过轻松的单锅蒸发诱导的自组装（EISA）策略制备的。去除结构导向剂后，具有较大特异性表面积（160 m〜2 g〜（-1））的M-ZRPO，大孔体积（0.26 cm〜3 g〜（-1））和狭窄的孔径分布（5.64 nm）已获得。小角度X射线衍射（SXRD）和透射电子显微镜（TEM）的结果表明，这些材料已经有序中孔结构。随着P/ZR的增加，可以改善M-ZRPO的纹理特性。此外，即使在800°C下进行处理，也可以保持有序的介质结构，这表明M-ZRPO具有吸引人的热稳定性。 NH3-TPD和吡啶-IR分析显示材料中存在丰富的Bronsted和Lewis酸位点。 M-ZRPO已成功用作固体酸催化剂，并在酮化反应中表现出卓越的性能。

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