The long-ranged structure mesoporous materisl is obtained by using solution silicate and surface silicate as Si and Al sources and CTAB as the template at a low temperature for a short time. The effect of the crystall...The long-ranged structure mesoporous materisl is obtained by using solution silicate and surface silicate as Si and Al sources and CTAB as the template at a low temperature for a short time. The effect of the crystallization time, crystallization temperature and the acting time of NaOH was discussed through XRD, nitrogen adsorption and TEM. The samples synthesized have a high thermal stability. The specific surface areas remain more than 800 m 2/g after being heated for 2 h at 800 ℃ and 200 m 2/g after being heated for 2 h at 1 200 ℃. Mesoporous material can be formed in 2 h at a temperature lower than 80 ℃.展开更多
The zeta-potential of montmorillonite-water colloid systems of different districts and distinct types are different. In this study the zeta-potentials were determined for montmorillonitewater colloid system of differe...The zeta-potential of montmorillonite-water colloid systems of different districts and distinct types are different. In this study the zeta-potentials were determined for montmorillonitewater colloid system of different districts and types. The relationship of octahedral(Fe3+Mg2+)and the cell parameter b0 dimension of montmorillonites with the zeta-potential of montmo rillonite-water colloid systems were discussed.展开更多
文摘The long-ranged structure mesoporous materisl is obtained by using solution silicate and surface silicate as Si and Al sources and CTAB as the template at a low temperature for a short time. The effect of the crystallization time, crystallization temperature and the acting time of NaOH was discussed through XRD, nitrogen adsorption and TEM. The samples synthesized have a high thermal stability. The specific surface areas remain more than 800 m 2/g after being heated for 2 h at 800 ℃ and 200 m 2/g after being heated for 2 h at 1 200 ℃. Mesoporous material can be formed in 2 h at a temperature lower than 80 ℃.
文摘The zeta-potential of montmorillonite-water colloid systems of different districts and distinct types are different. In this study the zeta-potentials were determined for montmorillonitewater colloid system of different districts and types. The relationship of octahedral(Fe3+Mg2+)and the cell parameter b0 dimension of montmorillonites with the zeta-potential of montmo rillonite-water colloid systems were discussed.
