Composition of pore surface investigated by positron annihilation lifetime spectroscopy
作者： Marek Gorgol , Maciej Tydda , Agnieszka Kierys , Radosław Zaleski
DOI: 10.1016/J.MICROMESO.2012.07.029
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摘要: Abstract Temperature dependence of ortho-positronium lifetime in the mesopores solids provides information about electron density pore walls. This feature was used to determine difference between porous polymer XAD7HP and two kinds polymer-silica composites prepared by swelling a silica source condensing it both basic acidic solutions. A higher amount on surface found for material conditions as compared one synthesized solution. Taking into account results SEM, nitrogen sorption 29Si MAS NMR, can say that penetrates micropores condensates mostly chains, while penetration inside pores is more shallow.
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