Pore structure control factors of polyamine-bridged polysilsesquioxanes by sol–gel method and their structure-adsorption properties for Au(III)

Abstract

A series of bridged polysilsesquioxane (BPS) materials was synthesized by the sol–gel method from 3-chloropropyl trimethoxysilane, diethylenetriamine (DETA) or ethylenediamine. Tetraethyl orthosilicate (TEOS) and/or one of the two templates, hexadecyl trimethyl ammonium bromide (CTAB) or P123, were used in the co-condensation process to construct some of the porous adsorbents. The adsorption of Au(III) was the highest for samples without TEOS, especially for the DETA series with CTAB template. This study elucidates the synthesis and applications of BPS materials.

Layered Nanoporous α-Gd2O3 Prepared by a Gd–Organic Framework Template for U(VI) Adsorption

“…There are many methods to deal with heavy metal ions in wastewater, such as chemical precipitation, evaporation concentration, membrane separation, ion exchange, and adsorption. Considering the practical application, the adsorption method is more efficacious for the treatment of radioactive wastewater, which is conducive to recycling. , …”

“…Considering the practical application, the adsorption method is more efficacious for the treatment of radioactive wastewater, which is conducive to recycling. 6,7 Recent years have seen frequent reports on adsorption research studies of uranyl by inorganic metal oxides and metal− organic framework materials (MOFs). 8,9 Inorganic nanomaterials have the disadvantages of the small specific surface area and poor adsorption effect at low concentration.…”