Click-based porous inorganic–organic hybrid material (PHM) containing cyclophosphazene unit and their application in carbon dioxide capture

Abstract

A high surface area porous hybrid material was synthesized by one-step click chemistry, which captures 1.83 mmol g−1 CO2 at 273 K.

Synthesis of cyclophosphazene bridged mesoporous organosilicas for CO 2 capture and Cr (VI) removal

“…[54] The third step mass loss above 400 °C is due to carbonization of the organic groups and the condensation of the P-N frameworks. [16,17] In the as-synthesized CPMO-4 as shown in Figure This was further confirmed from the N 2 sorption analysis. Figure 5a shows the N 2 sorption isotherms of CPMOs measured at 77 K. The N 2 sorption isotherms of the CPMO-0, CPMO-2 and CPMO-3 are almost similar and can be assigned as type-I due to the rapid uptake at low pressure (p/p 0 < 0.1) and no hysteresis was observed at higher pressure range.…”

“…Introduction of the peddle wheel structure of the cyclophosphazene units into the CPMO helps to form the mesoporous structure and resulted in the increasing surface area. [17] The pore volume of CPMOs increases from 0.05 cm 3 g -1 in CPMO-0 to 0.99 cm 3 g -1 in CPMO-8 with an increase in the TEOS:APTES ratios. More detailed about the physicochemical properties are given in Table 1 and Table S3.…”

“…As shown in Figure 2, strong bands around 1406-1418, 1100-1192 and 1200 M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 9 cm -1 which were attributed to ν as (P=N-P), ν s (P-N ring) and stretching vibration of P=N, respectively, further confirms the incorporation of P-N units. [16,17,50,51] Some of the bands are overlapped with the Si-O-Si bands. There is no possibility of having P-N…Si stretching vibration as Si is not directly bonded to P in the PN ring.…”

“…Figure This is common in nanoporous materials and reported by several groups. [16,17,57] The second step mass loss of ~18 % on heating up to 400 °C can be attributed to decomposition of amine and organic species anchored to the pore walls. [54] The third step mass loss above 400 °C is due to carbonization of the organic groups and the condensation of the P-N frameworks.…”

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

“…Recently, our group have demonstrated the substantial improvement of the textural properties by introducing the cyclophosphazene units into the frameworks. 23 More over, the presence of six P-Cl sites in PNC provide broad range of functionalized dendrimers and macrocyclic compounds by nucleophilic substitution reactions of the chloro group. The phosphazene and cyclophosphazene-based materials have number of applications in various fields due to their excellent thermal properties, biocompatibility, and biodegradability.…”