采用取代反应获得了具有Keggin结构的聚合羟基铁铝离子,并通过单分子层技术将聚合羟基离子嵌入到二硫化钼的层间,制得了层间距1.394至1.513nm的柱撑二硫化钼复合材料.研究表明,随着Fe/Al比的增加,层间距逐渐下降,颗粒度逐渐增大,比表面积逐渐降低.催化实验表明,柱撑材料将S2-催化氧化为S2O32-,其催化活性是2H-MoS2的4～5倍, 且光催化活性大于催化活性.这与材料比表面积增加所导致催化活性部位的增多,以及光致电子-空穴对的产生有关.
Hydroxy-Fe-Al oligocations with a Keggin structure were prepared by a substitution reaction. Through the
single-molecular-layer technology, the hydroxy oligocations are intercalated into the interlayers of molybdenum disulfide, which results
in the pillared composites having the basal interlayer spacings from 1.394 to 1.513nm. With the increasing of Fe/Al molar ratio,
the interlayer spacings and the surface areas of the pillared composites decrease, while their particle sizes increase. Catalyzed by the pillared
composites, sulfide ions are oxidized into thiosulfate ions. It exhibits that their catalytic activities are 4 to 5 times higher than that of the
pristine 2H-MoS$_2$, and that their catalytic activities are enhanced upon irradiation with visible light. Such catalytic behavior results from their
more catalytically active sites, owing to their larger surface areas, and the generation of the photoinduced electron-hole pairs during the
catalytically oxidization reaction process.
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