无机氨分子在纳米孔中的逸出行为研究
Study of the evolved behavior of inorganic ammonia molecules inside nanopores
牛延慧 1于文彬 2杨曙光 2万泉2
作者信息
- 1. 贵州师范学院化学与材料学院,贵州贵阳 550018
- 2. 中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州贵阳 550081
- 折叠
摘要
利用长链烷基溴化季铵盐CnTAB(n=12,16)模板剂,水热法制备了高纯度纳米孔二氧化硅.采用红外光谱仪、元素分析仪及气体吸附仪对纳米孔二氧化硅的孔结构进行了分析;通过热红联用同步热分析技术(TG(STA)-FTIR)探讨了在2种不同孔尺寸(3.2和4.1 nm)、组成单一且孔径均一的纳米孔中无机氨分子的受热逸出行为.数据结果表明,纳米孔内氨气的最终逸出温度随着孔尺寸的降低而增大,逸出温度可高达250 ℃.研究空间限制效应对纳米孔内氨水逸出行为的影响,不仅为无机小分子在纳米孔中的热稳定性及热运动提供了数据支撑,同时为纳米孔材料氢能载体存储机制提供了参考价值.
Abstract
This study investigated the effects of the length of long-chain alkyl bromides CnTAB(n=12,16)on the structure and properties of the materials.The analysis showed that the size of the nanopores had a significant effect on the escape behavior of ammonia molecules,and the final escape temperature of ammonia molecules within the nanopores increased with decreasing nanopore diameter.For a nanopore of 3.2 nm,the escape temperature can reach 250 ℃.These findings provide data support for the thermal sta-bility of small inorganic molecules in nanopores and inform the energy storage mechanisms of nanoporous materials.These insights are crucial for understanding the thermal stability of inorganic small molecules in nanopores and the energy storage mechanism of nanoporous materials.
关键词
氨气/逸出行为/纳米孔Key words
ammonia/evolved behavior/nanopores引用本文复制引用
基金项目
Doctoral Program Foundation of Guizhou Education University(2022BS010)
Science Technology Department Foundation of Guizhou Province(QianKe-HePingTaiRenCai[2018]5778-10)
Natural Science Foundation of Department of Education of Guizhou Province(QianJiaoHe KY2021021)
出版年
2024
NETL
NSTL
万方数据