Ureasil-Poly(ethylene oxide) Hybrid Matrix for Selective Adsorption and Separation of Dyes from Water

摘要: Herein, we present a cross-linked ureasil-polyether-siloxane hybrid (labeled PEO500) that can function as stimuli-sensitive material; it swells or shrinks in response to changes the environmental conditions and also, effectively selectively, remove dyes from water solution. We also developed methodology separate mixture of cationic anionic water. Addition PEO500 an aqueous solution orange II (OII) ponceau S (PS) dye rendered colorless, but methylene blue (MB) remained unchanged after 2 h contact with insoluble matrix. In situ small-angle X-ray scattering (SAXS) showed distance siloxane nanodomains are strongly affected by swelling shriking. By UV-vis adsorption experiments, found kinetics OII PS removal followed pseudo-first-order rate equation. accomplished B3LYP calculations, establish which sites on matrix interacted investigate nature matrix-dye chemical bonds. On basis experimental theoretical investigations, proposed some mechanisms explain how adsorbs efficiently. This "smart" is potentially applicable efficient, fast, selective, convenient device treatment materials.