Tailoring Porosity and CO<sub>2</sub> Capture Performance of Covalent Organic Frameworks Through Hybridization with Two-Dimensional Nanomaterials
This study reported covalent organic frameworks (COFs) and their hybrid composites with two-dimensional materials, graphene oxide (GO), graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>), and boron nitride (BN), to examine their structural, textural, and gas adsorption p...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-07-01
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| Series: | Inorganics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6740/13/7/237 |
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| Summary: | This study reported covalent organic frameworks (COFs) and their hybrid composites with two-dimensional materials, graphene oxide (GO), graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>), and boron nitride (BN), to examine their structural, textural, and gas adsorption properties. Material characterization confirmed the crystallinity of COF-1 and the preservation of framework integrity after integrating the 2D nanomaterials. FT-IR spectra exhibited pronounced vibrational fingerprints of imine linkages and validated the functional groups from the COF and the integrated nanomaterials. TEM images revealed the integration of the two components, porous, layered structures with indications of interfacial interactions between COF and 2D nanosheets. Nitrogen adsorption–desorption isotherms revealed the microporous characteristics of the COFs, with hysteresis loops evident, indicating the development of supplementary mesopores at the interface between COF-1 and the 2D materials. The BET surface area of pristine COF-1 was maximal at 437 m<sup>2</sup>/g, accompanied by significant micropore and Langmuir surface areas of 348 and 1290 m<sup>2</sup>/g, respectively, offering enhanced average pore widths and hierarchical porous strcuture. CO<sub>2</sub> adsorption tests were investigated showing maximum adsorption capacitiy of 1.47 mmol/g, for COF-1, closely followed by COF@BN at 1.40 mmol/g, underscoring the preserved sorption capabilities of these materials. These findings demonstrate the promise of designed COF-based hybrids for gas capture, separation, and environmental remediation applications. |
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| ISSN: | 2304-6740 |