Abstract
Abstract A series of MSU-x wormlike mesoporous silica samples were synthesized using a new type of gemini surfactants [C n H2 n +1N+(CH3)2–CO2–(CH2)4–CO2–N+(CH3)2C n H2 n +1] ·2 Br (n = 12, 14, 16) at circumneutral pH and characterized using Fourier transform infrared spectroscopy, thermo gravimetric analysis, X-ray diffraction, N2 adsorption-desorption and scanning electron microscopy. The MSU-x samples have high surface area and thick pore walls. The pore structure remained after treatment in boiling water for 72 h, which has hardly been reported among mesoporous materials synthesized under mild conditions. The effects of synthesis temperature, aging time and concentration of surfactant on the mesoporous structure were investigated. Based on these, a formation mechanism of mesoporous silica using the new gemini surfactant was proposed.
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