摘要
以葡萄糖和硝酸铝为原料,采用水热和硬模板辅助技术成功制备了氧化铝空心球。分别通过葡萄糖催化聚合-原位离子吸附一步进行(一步法)或葡萄糖聚合成球-离子吸附分步进行(二步法)制备铝碳复合球壳结构,然后经分步煅烧氧化制得氧化铝空心球。进一步对产物表征结果表明:二步法得到的空心球壳结构稳定紧凑,大小均一,粒径在亚微米级;而一步法步骤简单,操作快捷,但产物结构疏松,粒径在微米级,空心球比二步法有序度要高。此外,对氧化铝空心球结构的形成过程和可能的机理以及二步法中碳球表面基团进行了分析和探讨。
Hollow alumina spheres have been successfully prepared using a combination of hydrothermal and hard template-assisted techniques with aluminum nitrate and glucose as raw materials In this process,aluminum/carbon shell-core composite spheres were first formed by situ catalytic polymerization-absorption （a one-step process） or non-catalytic polymerization-adsorption （a two-step process）,and then multi-step thermally treated to obtain the final hollow alumina spheres. The hollow alumina spheres which were prepared by the two-step process had a stable,dense and uniform hollow core-shell structure. However,the hollow core-shell structure obtained by the simple and convenient one-step process was loosely bound together. The groups on the surface of the carbon spheres were identified and the mechanism of formation of the hollow alumina spheres is discussed.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第4期83-87,共5页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金(20676010)
关键词
氧化铝
空心球
模板法
水热法
alumina
hollow sphere
template
hydrothermal
