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在相同的反应体系中当ｐｈ值从约９．５调变至１１时分别合成出双中孔ＳｉＯ２和六方中孔ＳｉＯ２材料，并用ＸＲＤ、Ｎ２吸附、ＴＥＭ、ＴＧ／ＤＴＡ和ＦＴＩＲ等测试手段对合成产物进行了表征。实验结果表明，双中孔ＳｉＯ和六 方中孔ＳｉＯ２是合成中必然出现的两种不同的中孔物相。与六方中孔ＳｉＯ２相比，双中孔ＳｉＯ２也具有典型中孔 材料的特征ＸＲＤ谱图，虽然仅呈现一个易让人产生不完全晶化误解的相对较宽的单ＸＲＤ衍射峰（ｄ＝５．２ｎｍ），但它却给出一种独特的Ｎ２吸附等温线和窄的双峰中孔孔径分布曲线。由于孔壁的无定形及表面活性剂分子与ＳｉＯ２骨架间相似的相互作用，两类材料给出类似的ＦＴＩＲ谱图和ＴＧ／ＤＴＡ曲线。然而，在双中孔ＳｉＯ２的ＦＴＩＲ谱图中９６０ｃｍ处峰强度的微小变化可能意味着在锻烧脱除模板剂后双中孔ＳｉＯ２较六方中孔ＳｉＯ２具有更高的骨架聚合度。
In the same reaction system, the mesoporous SiO2 and hexagonal mesoporous SiO2 materials were synthesized when the ph value was changed from 9.5 to 11, respectively. The XRD, N2 adsorption, TEM, TG / DTA and FTIR measurements The synthesized product was characterized. Experimental results show that double mesopores SiO and hexagonal mesopores SiO2 are two different mesoporous phases that inevitably occur in the synthesis. Dual mesoporous SiO2 also has characteristic XRD patterns of typical mesoporous materials compared to hexagonal mesoporous SiO2, although only a relatively wide single XRD diffraction peak (d = 5 .2 nm), but it gives a unique N2 adsorption isotherm and narrow bimodal mesopore pore size distribution curve. Two types of materials give similar FTIR spectra and TG / DTA curves because of the amorphous wall and the similar interaction between the surfactant molecules and the SiO2 framework. However, a slight change in the peak intensity at 960 cm in the FTIR spectra of the mesoporous SiO2 may mean that the mesoporous SiO2 has a higher degree of backbone polymerization than the mesoporous SiO2 at the calcination de-template.