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Comparative study on the structural and catalytic properties of mesoporous hexagonal silica anchored with H3PW12O40 : green synthesis of benzoic acid from benzaldehyde

机译:H3PW12O40固定的介孔六方二氧化硅结构和催化性能的比较研究:苯甲醛绿色合成苯甲酸。

摘要

Mesoporous silica anchored with 25 wt.% 12-tungstophosphoric acid (H3PW12O40, HPW) were comparatively characterized on their structures and catalytic activities for benzaldehyde oxidation with H2O2. The results revealed that the mesoporous materials retained the typical hexagonal mesopores for the supports of HPW. It was found that HPW exhibited higher dispersion within MCM-41 than those within SBA-15 and other mesoporous molecular sieves. Moreover, the as-prepared materials were found to be the efficient catalysts for the green synthesis of benzoic acid. In particular, HPW/MCM-41 exhibited the best catalytic properties due to its suitable textural and structural characteristics.
机译:比较表征了以25%(重量)的12-钨磷酸(H3PW12O40,HPW)为锚固的介孔二氧化硅的结构和催化H2O2氧化苯甲醛的活性。结果表明,介孔材料保留了HPW载体的典型六边形介孔。发现HPW在MCM-41中的分散度高于在SBA-15和其他中孔分子筛中的分散度。此外,发现制备的材料是绿色合成苯甲酸的有效催化剂。特别是,HPW / MCM-41由于具有合适的质地和结构特性,因此表现出最佳的催化性能。

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