Controlling the Wall Thickness and Pore Size of SBA-15 by Using PPG and PEG as Additives
Ordered mesoporous silica SBA-15 with controlled pore size and wall thickness was synthesized using polypropylene glycol (PPG) and polyethylene glycol (PEG) as different additives. The final samples were characterized by low-angle X-ray diffraction, N2 adsorption-desorption and transmission electron microscopy. The SBA-15 used PPG or PEG as additive all could maintain the two-dimensional hexagonal structure. The addition of PPG could expand the pore size and decrease the wall thickness and the addition of PEG could reduce the pore size and increase the wall thickness of SBA-15.
Zhengyi Jiang, Jingtao Han and Xianghua Liu
J. X. Su et al., "Controlling the Wall Thickness and Pore Size of SBA-15 by Using PPG and PEG as Additives", Advanced Materials Research, Vols. 152-153, pp. 1514-1518, 2011