摘要
运用SAXS、XRD、TEM、BET、TGA、FT-IR和NH3-TPD表征手段深入研究了中国产的埃洛石纳米硅铝管（HNTs）的结构和物理性能。分别考察了焙烧温度和酸碱水热处理对HNTs纳米管结构的影响,研究了HNTs纳米管材料的质量损失和酸性位性质。结果表明,采用小角度散射表征（SAXS）计算的HNTs纳米管的孔径与TEM表征基本一致,孔径约为20~30nm;HNTs具有良好的热稳定性和较好的耐酸碱性;在400~550℃温度范围内,HNTs失去羟基缩合产生的化学水;HNTs既具有中强酸性位又具有强酸性位。
SAXS, XRD, TEM, BET, TGA, FT-IR and NH3-TPD were adopted to deeply study the structure and physical properties of halloysite nanotubes （HNTs）. The effects of calcination temperature and acid-alkali hydrothermal treatment on the structure of HNTs were investigated, respectively. The mass loss at heating and acid site of HNTs were studied. The results showed that the pore diameter of HNTs calculated by SAXS was consistent to TEM characterization, being in the range of 20- 30 nm. The perfect structure integrity of HNTs exhibited a better thermal stability and better acid-alkali resistant performance. The chemical water lose due to hydroxyl condensation of the tube wall during the range of calcination temperature 400--550℃. Both the moderate strong acid site and the strong acid site located on HNTs.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2016年第1期150-155,共6页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
江苏省科技支撑计划示范工程项目(BE2014613)资助
关键词
HNTs
纳米管
表征
热稳定性
HNTs
nanotube
characterization
thermal stability
