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Four types of polyamine‐bridged polysilsesquioxane adsorbents were prepared via a facile sol‐gel method using pre‐synthesized ethanediamine (EDA)‐ and diethylenetriamine (DETA)‐bridged monomers containing soft organic bridge. Infrared spectra (IR), scanning electron microscope (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TG), elemental analysis, and nitrogen gas adsorption–desorption...
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