Abstract
ABSTRACTA 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.
Highlights
Much attention in the past decade has been given to nanomaterials, as well as their applications in many fields including medicine, physiology, textile, electronics, aerospace and so on [1,2]
We report the synthesis of four series of polyamine-bridged polysilsesquioxane (BPS) and examine the factors that control the pore structure of the BPS materials
The adsorbent materials synthesized with the templates were denoted as C-EDA/T-x and C-DETA/Tx or P-EDA/T-x and P-DETA/T-x, where C and P refer to CTAB and P123, respectively, T refers to Tetraethyl orthosilicate (TEOS) and x refers to the molar ratio of TEOS to B-EDA-m or B-DETA-m in the initial silane mixture
Summary
Much attention in the past decade has been given to nanomaterials, as well as their applications in many fields including medicine, physiology, textile, electronics, aerospace and so on [1,2]. Researchers think that the techniques of synthesis of advanced adsorbents should be simple and repeatable and the methods underlying the synthesis of such adsorbents should give an opportunity for affecting physicochemical and structure-adsorption properties of the final product. From this point of view, the bridged polysilsesquioxanes (BPSs) are attractive compounds. Porous BPS materials have been prepared from monomers bearing rigid and short organic bridging groups, including ethane, ethylene, as well as small organic aromatics such as thiophene, xylene and benzene [10]. The adsorption capabilities of these materials for Au(III) were investigated
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