Positronium study of porous structure of sol–gel prepared SiO2: influence of pH
Source abstract
Abstract
Abstract Positron annihilation lifetime and Doppler broadening of annihilation line techniques have been used to obtain information about the small-pore structure of SiO 2 prepared by the alkoxide method in different experimental conditions. Samples prepared in strong acidic environment (pH = 2) contain only small pores with mean radius R ∼5 A, while those prepared at pH = 6 and pH = 9 contain pores of two sizes, R ∼5 and R ∼17–26 A. The influence of pH, water/alkoxide molar ratio and temperature of heat-treatment of the samples on their pore structure has been studied.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Muon and positron interactions and applications · Chemical Synthesis and Characterization · Ammonia Synthesis and Nitrogen Reduction
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (28)
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