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Rhodium-platinum (RhPt) colloidal bimetallic nanoclusters with different metal compositions are synthesized through chemical reduction method. Modification effect of poly(vinylpyrrolidone) (PVP) is investigated. Due to its different interaction with metal precursors, PVP can affect the formation of metal nanoclusters and has the ability of tuning surface structures of the bimetallic nanoclusters....
A novel process combining emulsification with sol–gel method is described to synthesize γ-Fe 2 O 3 /alginate/silica microspheres. The synthesis procedure consists of two steps: (1) synthesis of magnetic alginate microspheres via an emulsification technique; (2) in situ synthesis of magnetic silica microspheres by the hydrolysis of TEOS in the presence of ammonia solution. The as-synthesized...
Titanium zeolite beta (Ti-Al-β) and chromium aluminophosphate-5 (CrAPO-5) have been synthesized and characterized. Ti-Al-β catalyzes the epoxidation of 1-octene with H 2 O 2 or tert-butyl hydroperoxide (TBHP) as oxidant. A significant improvement in selectivity to epoxide was achieved when the Br nsted acid sites were exchanged with alkali metal ions. CrAPO-5 is an effective catalyst...
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