Synthesis of nanoscale zero-valent iron doped carbonized zeolitic imidazolate framework-8 for methylene blue removal in water

Nanoscale zero-valent iron-doped carbonized zeolitic imidazolate framework-8 (nZVI/CZIF-8) was prepared by carbonation of ferric nitrate and ZIF-8 at 800 °C and used as an adsorbent to remove methylene blue (MB) from water. The synthesized nZVI/CZIF-8 has a specific surface area of 806.9 m2/g, a pore volume of 0.86 cm3/g and an nZVI content of 1.35%, respectively. Both the nZVI/CZIF-8 and CZIF-8 have identical functional groups of O-H, C-H and C=C. With the increase of CZIF-8 size, MB removal rate increased. The doping of nZVI increased the MB removal percentage from 74.5% for ZIF-8 to 96.2% within 80 min for nZVI/CZIF-8. The MB removal percentage increased with the dosage of nZVI/CZIF-8. The MB adsorption with the adsorbents conforms to the Freundlich adsorption isothermal model and the removal rate fitted well to a pseudo-first-order model. The results demonstrate the feasibility of synthesizing high active and stable nZVI/CZIF-8 particles.

Polyethylenimine (PEI)-impregnated resin adsorbent with high efficiency and capacity for CO2 capture from flue gas

The adsorbent showed a high capacity for CO₂ with 3.60 mmol g⁻¹ under flue gas conditions over 90 consecutive adsorption cycles.

Highly Nitrogen-Doped Porous Carbon Derived from Zeolitic Imidazolate Framework-8 for CO2 Capture

Setting the trap: A nitrogen-doped porous carbon, with a nitrogen content of up to 25.52 % and specific surface area of 948 m2  g-1 , exhibits a superior CO2 uptake of 3.7 mmol g-1 at 25 °C and 1 bar. Experimental and theoretical results indicate that the nitrogen-containing functional groups enhance CO2 uptake through electrostatic, Lewis acid-base, and hydrogen-bonding interactions.

N 1-(3-Trimethoxysilylpropyl)diethylenetriamine grafted KIT-6 for CO2/N2 selective separation

In the present study N¹-(3-trimethoxysilylpropyl)diethylenetriamine was grafted on various ordered and commonly used mesoporous silica namely MCM-41 (2.2 nm), SBA-15 (6.6 nm) and KIT-6 (6.6 nm) in both anhydrous and aqueous conditions for CO₂/N₂ adsorption.

Novel N-doped porous carbon microspheres containing oxygen and phosphorus for CO2 absorbent and metal-free electrocatalysts

Novel carbon microspheres were synthesized from polyphosphazene and exhibit a considerable CO₂ capture performance and good electrocatalytic activity for ORR.

Nitrogen-doped porous carbon prepared from a liquid carbon precursor for CO2 adsorption

We report a new carbonaceous material derived from a liquid precursor, polyethylenimine (PEI) by chemical activation using KOH.

Polybenzoxazine-based nitrogen-containing porous carbons for high-performance supercapacitor electrodes and carbon dioxide capture

Nitrogen-containing porous carbons were synthesized from a novel polybenzoxazine for high-performance supercapacitor electrode and carbon dioxide capture.

A comprehensive study of polyaniline-derived porous carbons via KOH activation

High surface area porous carbons (up to 3768 m² g⁻¹) were prepared from as-synthesized polyaniline (PANI) by KOH activation. It is found that proper preheating before activation plays an important role in obtaining carbons with high BET surface area.

Theory and simulation of diffusion–adsorption into a molecularly imprinted mesoporous film and its nanostructured counterparts. Experimental application for trace explosive detection

To understand the diffusion–adsorption of small gas molecules in molecularly imprinted porous (MIP) systems, two general and suitable physicomathematical models have been developed for the molecularly imprinted mesoporous film and its nanostructured counterparts.