Heterocyclic tri-urea isocyanurate bridged groups modified periodic mesoporous organosilica synthesized for Fe(III) adsorption

To achieve a high level of heavy metal adsorption, 1,1′,1″-(1,3,5-triazine-2,4,6-triyl)tris(3-(3-(triethoxysilyl)propyl)urea) (TTPU) was synthesized as a novel melamine precursor and incorporated on the silica surface of periodic mesoporous organosilica (PMO). The melamine modified PMOs (MPMOs) were synthesized under acidic conditions using TTPU, tetraethylorthosilicate (TEOS) and Pluronic P123 as a template and the modified PMOs were characterized using the relevant instrumental techniques. The characteristic materials were used as adsorbents for the adsorption of Fe(III) ions. Fe(III) adsorption studies revealed MPMO-7.5 to be a good absorbent with higher adsorption efficiency than other MPMOs.

Graphical AbstractA new organosilica precursor, TTPU, has been successfully synthesized and characterized to incorporate on the silica surface of periodic mesoporous organosilica (PMO). The melamine modified PMOs (MPMOs), in particular, the MPMO-7.5 was found to exhibit good adsorption efficiency for Fe(III).Figure optionsDownload as PowerPoint slideHighlights
► Synthesis of new melamine modified periodic mesoporous organosilicas (MPMOs).
► A new organosilica precursor, TTPU, has been successfully synthesized for the MPMOs.
► The MPMOs were characterized by the relevant instrumental techniques.
► MPMO-7.5 exhibits higher adsorption efficiency for Fe(III) ions than other MPMOs.