羟基自由基辅助沸石分子筛合成的研究进展

Advances in Hydroxyl Free Radical Assisted Synthesis of Zeolite

作为化学工业中最重要的固体催化剂之一,沸石分子筛在不同的领域发挥着广泛的应用.随着消耗量的逐年增加,如何绿色高效地制备沸石分子筛材料已经成为了研究热点.羟基自由基是具有高活性的物种,能够促进分子筛初始凝胶中硅铝酸盐的解聚和再聚合,进而加速了分子筛的晶化过程.众多研究表明,除了能够加速沸石的结晶,羟基自由基在其合成过程中还有其他的作用.本综述从不同的产生方式入手,系统地介绍了羟基自由基在沸石合成中的作用,提出了该策略存在的问题,并对其发展前景进行了展望.

As one of the most important solid catalysts in chemical industry,zeolites are widely used in different fields.How to prepare zeolites greenly and efficiently has become a research hot issue with the increase of consumption year by year.Hydroxyl free radical is a highly active species,which can promote the depolymerization and repolymerization of aluminosilicates in the zeolite initial gel,and then accelerating the zeolite crystallization process.Besides accelerating the crystallization of zeolite,many studies have shown hydroxyl free radicals have other functions in zeolite synthesis.In this review,the role of hydroxyl free radicals in the synthesis of zeolites is systematically introduced via different generation methods.The challenges of the hydroxyl free radical assisted strategy are put forward,and its development directions are prospected.