Mesoporous structure of Al2O3 prepared from poly(N-vinylpyrrolidone)-modified sols of hydrous metal oxides
Source abstract
Abstract
Mesoporous alumina with a narrow effective pore diameter distribution has been prepared using poly( N -vinylpyrrolidone)-modified sols of hydrous Al 2 O 3 and Al 2 O 3 -ZrO 2 . We compare the microstructures of nanoporous aluminas prepared from electrochemically produced unmodified and modified sols of hydrous oxides and describe the formation of highly ordered mesoporous structures from a mixture of modified sols of hydrous metal oxides differing in chemical nature. Microstructural studies of uni-and biporous permeable nanosystems during heat treatment demonstrate that the pore diameter distribution in the mesoporous oxides prepared from the modified sols remains unchanged at calcination temperatures of 700°C and lower. The microstructure and phase composition of the oxides depend on the initial properties of the sols.
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Research context
OpenAlex topics: Mesoporous Materials and Catalysis · Aerogels and thermal insulation · Advanced ceramic materials synthesis
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