Effect of Triblock Copolymer on Carbon-Based Boron Nitride Whiskers for Efficient CO2 Adsorption

Abstract

Herein, we investigated novel carbon-containing P123 copolymer-activated boron nitride whiskers (P123-CBNW) fabricated via a structure directing approach followed by a single-step heat treatment under N2. The resulting materials were found to be highly micro- and mesoporous. The influence of the activating agent (P123 copolymer) on the CO2 adsorption efficiency was determined. The prepared samples possessed high specific surface areas (594–1732 m2/g) and micropore volumes (0.258–0.672 cm3/g). The maximum CO2 uptakes of the prepared adsorbents were in the range 136–308 mg/g (3.09–7.01 mmol/g) at 273 K and 1 bar and 97–114 mg/g (2.22–4.62 mmol/g) in the following order: CBNW < P123-CBNW3 < P123-CBNW2 < P123-CBNW1 < P123-CBNW0.5. The isosteric heat of adsorption values (∆Qst) were found to be 33.7–43.7 kJ/mol, demonstrating the physisorption nature of the CO2 adsorption. Extensive analysis revealed that the presence of carbon, the high specific surface area, the high microporosity, and the chemical structural defects within the adsorbents are responsible for raising the CO2 adsorption ability and the selectivity over N2 gas. The fabricated adsorbents show excellent regeneration ability after several repeated adsorption cycles, making the prepared adsorbents promising candidates for gas storage applications.

Deciphering the Weak CO2···Framework Interactions in Microporous MOFs Functionalized with Strong Adsorption Sites—A Ubiquitous Observation

“…The separation of carbon dioxide from industrial gas mixtures (flue gas, landfill gas, syn gas, etc.) is an imperative target to keep the atmospheric CO 2 concentration in check. , Of the many techniques, adsorption-based separation of CO 2 using porous solid sorbents is highly promising. − This is owing to their high energy efficiency, recyclability, and facile synthesis. In developing such solid sorbents, several key aspects such as high surface area, suitable chemical functionalities, favorable pore structures capable of providing molecular confinement, and optimal host–guest as well as guest–guest interactions play a key role.…”

Poly(lactic acid) based Pearl Layer Moistureproof Membrane for Flexible Laminated Packaging

“…and the dispersion of the filler in the polymer matrix. [ 25 ] The high aspect ratio and layered structure of BN [ 26 ] can improve the length and tortuosity of gas molecular diffusion path in the composites, thus greatly improving the gas barrier properties of the materials. In addition, BN also has high thermal stability, [ 27 ] good flexibility, and excellent mechanical properties.…”

A Novel Surfactant Sensitized Fluorescent Sensor for Co(II) Based on Nitrogen Doped Carbon Quantum Dots

“…Since Xu et al [9] accidentally discovered CDs in the process of separating and purifying single-walled carbon nanotubes (SWCNT) in 2004, and CDs have become a research hotspot and applied in multiple fields [10] due to their excellent properties, including good fluorescence characteristics, water solubility, biocompatibility, and low toxicity [11][12][13][14][15]. Like other carbon-based materials, the materials can be modified by element doping [16,17]. At present, many studies show that introducing N element to nitrogen-doped carbon dots (N-CDs) preparation can enhance the fluorescence intensity of CDs due to the synergistic charge transfer between electron-rich nitrogen atoms and electron-deficient carbon atoms [18,19].…”