β-Cyclodextrin Modified Hybrid Magnetic Nanoparticles as an Adsorbent for Phenol Removal

Abstract

β-cyclodextrin modified hybrid magnetic nanoparticles (Fe3O4@SiO2-h-PAMAM-CD) with a core-shell structure were prepared via the classic hyperbranched polyamidoamine synthesis method, the combination of Michael addition and aminolysis reaction, on the surfaces of silica coated iron oxide nanoparticles. The novel structure was confirmed by fourier transform infrared spectra (FT-IR), Transmission electron microscopy (TEM), and thermogravimetric analysis (TGA), and the superior magnetic property was maintained and helped the material to separation and recycling. Further more, Fe3O4@SiO2-h-PAMAM-CD demonstrated excellent recycling and adsorption capacity for small molecule phenol in the aqueous solution.

Catalytic Chiral Photochemistry Sensitized by Chiral Hosts-Grafted Upconverted Nanoparticles

“…The amount of CD loading on UCNP was quantitatively evaluated through thermogravimetric analysis (TG). An apparent weight loss was observed when the temperature was raised above 200 °C (Figure f), and the significant weight reduction between 293 and 330 °C could be ascribed to the decomposition of γ-CD, − from which the mass fraction of CD 1 – CD 5 carried on the UCNP surface was estimated to be in the range of 2.6–4.3 wt %. The contents of CD 5 on UCNP were tuned simply by changing the ratio of CD 5 and the bare UCNP, and five batches of UCNP-CD 5 -1 – UCNP-CD 5 -5 carrying about 1.8–8.2 wt % CD 5 (Figure S4) were consequentially prepared.…”

Preparation of β-Cyclodextrin Polymer by Inverse-Phase Suspension Polymerization and its Capability for Phenol Removal

“…It is known that β-CD and substrates can form host-guest complex. This complexation depends on the size, shape and hydrophobicity of the guest molecule [12][13][14][15]. The adsorption capacity of EPI-CD polymer to phenol was further investigated.…”