Synthesis of spherical mesostructured zirconium phosphate with acidic properties
Synthesis of spherical mesostructured zirconium phosphate with acidic properties
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DOI：
10.1016/j.micromeso.2006.05.008
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发表时间：
2006-10
影响因子：
5.2
通讯作者：
A. Tarafdar;A. Panda;N. Pradhan;P. Pramanik
中科院分区：
文献类型：
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作者：
A. Tarafdar;A. Panda;N. Pradhan;P. Pramanik
以碳酸锆配合物、磷酸氢二铵和十四烷基三甲基溴化铵（TTBr）为原料，在碱性介质中通过沉淀法制备了具有优良酸性的球形介孔磷酸锆。煅烧产物的EDAX分析显示P/Zr比为1.93。通过煅烧除去表面活性剂后，获得了299 m2/g的高比表面积和窄的孔径分布。煅烧后的粉末的TEM显微照片显示为介孔球形颗粒，粒径为0.81μm。从吡啶脱附FTIR中，在煅烧的材料中发现了合理量的布朗斯台德酸中心的存在。NH3-TPD实验表明合成的磷酸锆具有良好的酸性。合成的材料已成功地用作乙酸乙酯液相水解反应的酸催化剂。
Spherical particles of mesoporous zirconium phosphate with excellent acidic properties have been prepared using a zirconium carbonate complex, diammonium hydrogen phosphate and tetradecyltrimethylammonium bromide (TTBr) in basic medium through precipitation. EDAX analysis of the calcined product has shown the P/Zr ratio 1.93. High specific surface area of 299m2/g with narrow pore size distribution has been achieved after the removal of the surfactant through calcination. TEM micrograph of the calcined powder indicates mesoporous spherical particles with particle size 0.81μm. From pyridine desorbed FTIR, the presences of a reasonable amount of Brönsted acid sites have been found in the calcined material. NH3-TPD experiment suggests excellent acidic nature of the synthesized zirconium phosphate. The synthesized material has been used successfully as an acid catalyst in ethyl acetate hydrolysis reaction in liquid phase.