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首页> 外文会议>ACS Symposium Series 890; Symposium on Nanotechnology and the Environment: Applications and Implications; ; >Synthesis of Surfactant Templated Aerogels with Tunable Nanoporosity
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Synthesis of Surfactant Templated Aerogels with Tunable Nanoporosity

机译：具有可调纳米孔隙率的表面活性剂模板化气凝胶的合成

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摘要

Several varieties of regular and surfactant-templated alumina aerogels and xerogels were synthesized. The problems associated with retention of textural properties were greatly reduced through surfactant-templated sol-gel synthesis pathways for alumina and subsequent removal of the solvents and templates from the gel network by a technique that involves a supercritical drying method. For the first time, Surfactant-Templated Alumina Aerogel (STAA) was made and showed remarkable thermal stability and gave specific surface area of as high as 1000 m~2/g for as-synthesized STAA and up to 600 m~2/g for calcined STAA. Extent of removal of surfactant was determined using FTIR. Furthermore, NiO/Al_2O_3 catalysts were prepared by co-precipitating the active metal and support. Nitrogen adsorption desorption isotherms (NAD) were used to follow the evolution of the extraction of the pore solvents and templates and to follow the textural properties and XRD was used to follow the morphological properties and the structural phase change for the synthesized gels. SEM-EDS is utilized to study dispersion of nickel on alumina.
机译：合成了几种常规和表面活性剂模板的氧化铝气凝胶和干凝胶。通过用于氧化铝的表面活性剂模板化的溶胶-凝胶合成途径以及随后通过涉及超临界干燥方法的技术从凝胶网络中去除溶剂和模板，大大降低了与保持结构特性相关的问题。首次制备了表面活性剂模板氧化铝气凝胶（STAA），并显示出显着的热稳定性，合成后的STAA的比表面积高达1000 m〜2 / g，而合成的STAA的比表面积高达600 m〜2 / g。煅烧的STAA。使用FTIR确定去除表面活性剂的程度。此外，通过使活性金属和载体共沉淀来制备NiO / Al_2O_3催化剂。氮气吸附解吸等温线（NAD）用于跟踪孔溶剂和模板的提取过程，并跟踪结构性质，XRD用于跟踪合成凝胶的形态学性质和结构相变。 SEM-EDS用于研究镍在氧化铝上的分散性。

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