Effects of fluoride ion on the formation of earthworm‐like mesoporous silica |
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| Authors: | Yuxiang Yang Huan Yang Lu Liu Tong Li Hongmin Yuan Chaoying Ni |
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| Affiliation: | 1. School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, China;2. Department of Materials Science and Engineering, University of Delaware, Delaware;3. Center for Composite Materials, University of Delaware, Delaware;4. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, China |
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| Abstract: | In a strong acidic environment, ordered earthworm‐like mesoporous silica has been synthesized with CTAB templating and fluoride ion (F?) as a counterion. The synthesized products were characterized by small‐angle X‐ray diffraction (SXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption‐desorption isotherms, and Fourier‐transform infrared spectroscopy (FTIR). The effects of F/Si mole ratio on the morphology, surface area, and the pore size of the sample were discussed. It was found that a F/Si mole ratio at 0.083 induced the formation of 3D hexagonal mesophase, whereas higher F/Si mole ratios led to the formation of 2D hexagonal mesoporous silica, the optimum molar ratio of F/Si for the formation of delicate earthworm‐like mesoporous silica was observed at 0.250. The effects of the F/Si mole ratio, surfactant chain length, acid concentration, and shear flow on morphology were also studied. |
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| Keywords: | 3D hexagonal mesophase earthworm‐like mesoporous silica fluoride ion |
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