铝柱撑二硫化钼的制备及其催化氧化性质  

Preparation and Catalytic Oxidation Activities of Molybdenum Disulfide Composites Pillared by Hydroxy-Al Oligocations

作　　者：裴小科[1] 林碧洲[1] 张进飞[1] 李真[1] 韩国华[1] 许百环[1] 

机构地区：[1]华侨大学材料物理化学研究所,泉州362021

出　　处：《无机化学学报》2005年第3期357-362,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.50172016)

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1.519 nm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.The molybdenum disulfide composite materials pillared by hydroxy-Al oligocations 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 composites with a larger interlayer space. Compared with the pristine 2H-MoS2, the pillared 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 oxygen, the pillared composites exhibited good catalytic activities in the oxidization 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 irradiation with visible light. The results are related to their more catalytically active sites owing to their lamer surface areas and the generation of the photoinduced electron-hole pairs.

关 键 词：柱撑 催化氧化 物质的量 单分子层 嵌入 催化活性 层间距 MOS2 比表面积 二硫化钼 

分 类 号：O643[理学—物理化学] O611[理学—化学]