MCM-41 materials were prepared hydrothermally by using template mixtures of hexadecyltrimethylammonium/dodecyltrimethylammonium (C16TMABr/C12TMABr) with various molar ratios. The MCM-41 materials thus prepared were highly ordered and their pore sizes can be finely controlled by changing the C16TMABr/C12TMABr molar ratio.
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Namba et al. (1998) studied this question.
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