硅铝酸盐类纳米管的制备及其脱硫性能考察

发布时间：2018-05-19 07:30

  本文选题：硅铝酸盐纳米管 + 高岭土纳米管　； 参考：《天津大学》2015年硕士论文

【摘要】：埃洛石纳米管和伊毛缟石纳米管属于天然硅铝类纳米管,它们在自然界中有一定的储量。与碳纳米管相比,硅铝酸盐纳米管具有价廉易得、无毒无害以及良好的生物相容性等优点,已受到广泛研究者们的青睐,在催化材料、有机/无机杂化材料、生态环境材料、生物医药材料和仿生材料等各领域都已有应用。受其应用领域的扩展与发展,其天然储量已不能满足发展的需求。因此,探索开发人工合成硅铝类纳米管,尤其是源于天然矿为原料的合成工艺具有重要的实际价值。本课题针对已有的人工合成路线进行了系统分析,寻找出影响人工合成硅铝类纳米管效率的关键因素,提出了相应的改进方案;并因此制备了系列的硅铝类纳米管,研究了制备条件及改性处理对人工合成硅铝类纳米管结构及脱硫性能的影响规律。研究发现新制备方案成功合成了硅铝类纳米管并有效的缩短了制备周期,该方案合成的硅铝纳米管与天然纳米管并无明显差异,具有良好的均一性和较大的长径比;改性实验发现改性后高岭土纳米管的脱硫性能有明显的提高。其最好效果达到了脱硫率75.82%,比原高岭土纳米管提高30.27%的实验效果。成功合成了伊毛缟石纳米管,对其结构性能做了初步探索,其管径约为1nm左右,管长约为几微米。考察了其热稳定性,发现合成伊毛缟石纳米管热稳定性较差,250℃左右管状结构基本被破坏。并对其做了脱硫性能测试,脱硫结果表明合成伊毛缟石纳米管的脱硫性能要好于高岭土纳米管。
[Abstract]:Eroxite nanotubes and Imaurite nanotubes belong to natural silica-aluminum nanotubes, and they have certain reserves in nature. Compared with carbon nanotubes, aluminosilicate nanotubes have many advantages, such as low cost, innocuity and good biocompatibility. They have been favored by many researchers, such as catalytic materials, organic / inorganic hybrid materials, ecological materials, etc. Biomedical materials and biomimetic materials have been used in various fields. Due to the expansion and development of its application field, its natural reserves can no longer meet the needs of development. Therefore, it is of great practical value to explore and develop synthetic silicon and aluminum nanotubes, especially those derived from natural ore. In this paper, the existing synthetic routes are systematically analyzed, the key factors affecting the efficiency of synthetic Si-Al nanotubes are found out, and the corresponding improvement schemes are put forward, and a series of Si-Al nanotubes are prepared. The effects of preparation conditions and modification treatment on the structure and desulfurization properties of synthetic Si-Al nanotubes were studied. It is found that the new preparation scheme successfully synthesized Si-Al nanotubes and effectively shortened the preparation period. The Si-Al nanotubes synthesized by the new scheme have no obvious difference from natural nanotubes and have good homogeneity and larger aspect ratio. It was found that the desulfurization performance of modified kaolin nanotubes was improved obviously. The best effect is 75.82%, which is 30.27% higher than that of kaolin nanotubes. The structure and properties of Imaurite nanotubes were successfully synthesized. The diameter of the nanotubes was about 1nm and the length of the nanotubes was about several microns. The thermal stability of synthetic chimerite nanotubes was investigated, and it was found that the tubular structure was basically destroyed at about 250 鈩，

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