【摘要】 本文采用单分子层技术将聚合羟基铝簇离子嵌入到二硫化钼板层间,得到层间距为1.481至1.519nm的柱撑二硫化钼复合材料。XRD、DSC等研究表明,柱化液的滴加浓度越稀、柱撑反应体系中Al∶MoS2物质的量之比越小越有利于获得层间距较大的柱撑材料。与原料2H-MoS2相比,柱撑材料的层间距增大,颗粒度变小,比表面积增加。在氧气条件下,对Na2S的催化氧化实验表明,柱撑材料较原料2H-MoS2的催化氧化活性提高3~4倍,且光催化活性大于催化活性。这与柱撑材料的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。更多还原

【Abstract】 The molybdenum disulfide composite materials pillared by hydroxy-Al ol igocations with the basal interlayer space from 1.481 to 1.519 nm were prepared by intercalating the hydroxy-Al oligocations into the interlayers of molybdenum disulfide through the single-molecular-layer technology. The pillared composites were characterized by x-ray diffraction, differential scanning calorimetry and other methods. Results show that a lower concentration of pillared agents and a lower ratio of Al∶MoS2 in reaction system would result in the pillared composit es with a larger interlayer space. Compared with the pristine 2H-MoS2, the pilla red composites exhibited larger interlayer space expansions from 0.866 to 0.904 nm, smaller grain sizes and larger surface areas. In the presence of molecular o xygen, the pillared composites exhibited good catalytic activities in the oxidiz ation of sulfide ions into thiosulfate ions, being 3 to 4 times higher than that of the pristine 2H-MoS2. The catalytic activities were enhanced upon irradiatio n with visible light. The results are related to their more catalytically active sites owing to their larger surface areas and the generation of the photoinduce d electron-hole pairs.更多还原