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- W2363406081 abstract "The derivatives of natural polymer chitin and chitosan: sodium salt of carboxymethyl-chitin and chitosan acetate, were examined as the protective polymers for the formation of the precious metal colloids. In the presence of carboxymethylchitin or chitosan acetate, stable metallic colloids of palladium, rhodium, ruthenium, platinum silver and gold were formed in a methanol-water solvent system. Particularly, TEM measurements illustrate that the narrowly dispersed metallic colloids with fine particle size can be formed in the case of palladium- rhodium or ruthenium carboxymethylchitin or chitosan acetate systems. That is in carboxymethylchi'in protective system, palladium sol is mostly distributed in the range of 4.0-5.0 nm with an average diameter of 4.6 nm and rhodium sol or ruthenium sol is in 3.5-4.5 nm with an average diameter of 4.0 nm or in 3.0-3.5 nm with an average diameter of 3.2 nm, respectively; in chitosan acetate protective system, rhodium sol is in 4.0-5.0 nm with an average diameter of 4.6 nm. Palladium, rhodium and platinum sols were tested as catalysts for the partial hydro-genation of 1,3-cyclooctadiene and showed quite a good activity as well as selectivity." @default.
- W2363406081 created "2016-06-24" @default.
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- W2363406081 date "1993-01-01" @default.
- W2363406081 modified "2023-09-23" @default.
- W2363406081 title "CHITIN AND CHITOSAN DERIVATIVES PROTECTED PRECIOUS METAL COLLOIDS" @default.
- W2363406081 hasPublicationYear "1993" @default.
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