Polytriazine with high nitrogen content (c.a. 50.5 wt %) has been synthesized by an ultrafast microwave-assisted method using melamine and cyanuric chloride. The nitrogen-enriched nanoporous polytriazine (NENP-1) has exhibited high specific surface area (maximum SABET of 838 m2 g–1) and narrow pore size distribution. The NENP-1 has been employed as electrode material for supercapacitor application. A maximum specific capacitance (Csp) of 1256 F g–1 @1 mV s–1 and 656 F g–1 @1 A g–1 are estimated from the cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) measurements, respectively, in a three-electrodes configuration. This Csp value is considered as very high for a nonmetallic system (organic polymer). Superior capacitance retention of 87.4% of its initial Csp was observed after 5000 cycles at a current density of 5 A g–1 and demonstrates its potential as an efficient electrode material for practical applications. To test this claim, an asymmetric supercapacitor device (ASCD) was fabricated. The Csp values of the device in the two-electrode configuration are 567 F g–1 @5 mV s–1 and 287 F g–1 @4 A g–1 in the CV and GCD measurements, respectively. The ASCD has shown superior energy density and power density of 102 Wh kg−1 and 1.6 kW kg–1, respectively, at the current density of 4 A g–1. The energy density is much higher than the best reported supercapacitors and also close to the commercial batteries. This indicates the material could bridge the gap between the commercial batteries and supercapacitors.

Cyclophosphazene based nitrogen-rich aminal-linked inorganic–organic hybrid nanoporous materials were synthesized by a Schiff-base condensation reaction, which captures 18.9 wt% of CO2.

An iron(II)phthalocyanine (Fepc) modified mesoporous titania (Fepc-TiO2) nanocatalyst with a specific surface area of 215 m(2) g(-1) has been synthesized by a hydrothermal method. Fepc-TiO2 degrades one of the highly toxic chemical warfare agents, sulfur mustard (SM), photocatalytically under sunlight with an exposure time of as low as 70 min. Furthermore, the mesoporous Fepc-TiO2 also captured 2.1 mmol g(-1) of CO2 at 273 K and 1 atm.

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

porous materials, the diffusion measurements can be used to obtain detailed microgeometric information about porous materials. [7] Therefore, fine control of homogeneously distributed pore size and morphology in porous media is required to understand the fundamental physical adsorption and diffusion processes.Among the various nanoporous materials available, metal-organic frameworks (MOFs) are a promising candidate for investigating the adsorption and diffusion characteristics of gas separation/purification application because of their crystallinity and tunability of the pore structure. To date, however, only a few MOFs have been utilized to investigate the application of diffusivity to gas separation either experimentally (e.g., pulsed-field-gradient (PFG) NMR and quasi-elastic neutron scattering (QENS)) or through molecular dynamic simulations. [8][9][10][11] Stallmach et al. used PFG NMR to study the diffusion of hydrocarbons, such as methane, ethane, n-hexane, and benzene, in MOF-5 and revealed for the first time the diffusivity correlation between the surface area and the pore size. [8] Similarly, Pusch et al. explored CO 2 and CH 4 self-diffusion in ZIF-8 at elevated pressure and found that the former diffuses slightly faster than the latter. They also used QENS to observe the microscopic molecular dynamics in porous frameworks. [9] Using QENS measurements, Rives et al. investigated the dynamics of xylene isomers (m-, o-, and p-xylene) in MIL-47(V) and found that the diffusion increases with the increase in temperature. [10] Russina et al. also reported the Kinetic-quantum-sieving-assisted H 2 :D 2 separation in flexible porous materials is more effective than the currently used energy-intensive cryogenic distillation and girdle-sulfide processes for isotope separation. It is believed that material flexibility results in a pore-breathing phenomenon under the influence of external stimuli, which helps in adjusting the pore size and gives rise to the optimum quantum-sieving phenomenon at each stage of gas separation. However, only a few studies have investigated kinetic-quantumsieving-assisted isotope separation using flexible porous materials. In addition, no reports are available on the microscopic observation of isotopic molecular transportation during the separation process under dynamic transition. Here, the experimental observation of a significantly faster diffusion of deuterium than hydrogen in a flexible pore structure, even at high temperatures, through quasi-elastic neutron scattering, is reported. Unlike rigid structures, the extracted diffusion dynamics of hydrogen isotopes within flexible frameworks show that the diffusion difference between the isotopes increases with an increase in temperature. Owing to this unique inverse trend, a new strategy is suggested for achieving higher operating temperatures for efficient isotope separation utilizing a flexible metal-organic framework system.Molecular diffusion in nanoporous materials for processes such as adsorption, separation, and catalysis is one ...