Sonochemical synthesis of cyclophosphazene bridged mesoporous organosilicas and their application in methyl orange, congo red and Cr(vi) removal

Abstract

Cyclophosphazene-bridged mesoporous organosilicas have been synthesized by a fast sonochemical method which efficiently removed organic dyes and Cr(vi) ions.

Eco-Friendly Phosphorus and Nitrogen-Rich Inorganic–Organic Hybrid Hypercross-linked Porous Polymers via a Low-Cost Strategy

“…The peak at 1600 cm –1 is the typical vibration of the aromatic ring. The preservation of cyclophosphazene units in the hypercross-linked polymers is confirmed by the signal appearing at 1205–1190 cm –1 due to the PN bending vibration. − The observation of a band at 988 cm –1 is assigned to the P–O vibrations. Likewise, the FT-IR spectrum of HCP-PN-2 has almost the same pattern as explained for HCP-PN-1, suggesting the structural similarity.…”

Cyclophosphazene-Based Hybrid Nanoporous Materials as Superior Metal-Free Adsorbents for Gas Sorption Applications

“…Further, the observation of a broad resonance signal at 10 ppm in the 31 P CP-MAS NMR spectrum of CHNM-1 (Figure 1b) confirms the inclusion of the cyclophosphazene moieties in the framework. 47,48 Detailed NMR signal assignments are summarized in Table S1a,b.…”

“…A combination of few or all of the characteristics could potentially provide an ideal adsorbent. In this regard, our research group has been using cyclophosphazene as an interesting and important metal-free inorganic moiety to synthesize high-surface-area inorganic–organic hybrid materials. ,− As documented in some of our recent research, the three-dimensional paddle wheel structure of cyclophosphazene has exerted a synergic effect in improving the specific surface area. ,− This synergic effect was proved with various precursors and different synthetic approaches such as click chemistry, Schiff base condensation, hydrolysis, and polycondensation. Additionally, the N and P present in the framework further facilitate the applications. , In the present research, high-surface-area nanoporous multifunctional hybrid adsorbents have been made by condensing pyrrole with the cyclophosphazene derivative.…”

A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

“…[52,53] Mohanti et al have used cyclotriphosphazene and trialkoxysilyl groups for the preparation of porous silica for adsorptiono fC r 2 O 7 2À ions, despite the relativelyl ow surface area. [54][55][56] In this study,w ep resent the synthesis of an ew hybrid material from the reaction of octavinylsilsesquioxane (OVS) with hexa(4-bromophenoxy)-cyclotriphosphazene using Pd(OAc) 2 /(o-CH 3 Ph) 3 Pa st he catalyst. Adsorption property of the materialf or heavy metal ions is demonstrated and studied.…”