Facile Preparation of Carbon Nitride-ZnO Hybrid Adsorbent for CO2 Capture: The Significant Role of Amine Source to Metal Oxide Ratio

Anuar, Siti Aishah; Al-Amiery, Ahmed A.; Masdar, Mohd Shahbudin; Isahak, Wan Nor Roslam Wan

doi:10.3390/catal11101253

Cited by 3 publications

(2 citation statements)

References 37 publications

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“…CO 2 capture/storage is a challenge for global warming, where several studies have been addressed for the adsorption of CO 2 . − Studies of CO 2 capture show a maximum amount of CO 2 adsorbed ranging from approximately 25–176.66 mg/g at higher pressure. , …”

Section: Introductionmentioning

confidence: 99%

CO₂ and CO Capture on the ZnO Surface: A GCMC and Electronic Structure Study

Gordijo,

Rodrigues,

Martins

2023

ACS Omega

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The amount of polluting gases released into the atmosphere has grown drastically. Among them, it is possible to cite the release of CO 2 and CO gases on a large scale as one of the products of the complete and incomplete combustion of petroleum-derived fuels. It is worth noting that the production of energy by burning fossil fuels supplies the energy demand but causes environmental damage, and several studies have addressed the reduction. One of them is using materials with the potential to capture these gases. The experimental and theoretical studies have significant contributions that promote advances in this area. Among the materials investigated, ZnO has emerged, demonstrating the considerable potential for capturing various gases, including CO 2 and CO. This work used density functional theory (DFT) and Grand Canonical Monte Carlo Method (GCMC) to investigate the adsorption of CO 2 and CO on the surface of Zinc oxide (ZnO) to obtain adsorption isotherms and interaction energy and the interaction nature. The results suggest that CO 2 adsorption slightly changed the angle of the O–C–O to values less than 180°. For the CO, its carbon atom interacts simultaneously with Zn and O of the ZnO surface. However, CO interactions have an ionic character with a lower binding energy value than the CO 2 interaction. The energies calculated using the PM6 and DFT methods generated results compatible with the experimental values. In applications involving a mixture of these two gases, the adsorption of CO 2 should be favored, and there may be inhibition of the adsorption of CO for high CO 2 concentrations.

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Section: Introductionmentioning

confidence: 99%

CO₂ and CO Capture on the ZnO Surface: A GCMC and Electronic Structure Study

Gordijo,

Rodrigues,

Martins

2023

ACS Omega

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“…As ZnO has interesting surface properties, which drive the many applications mentioned before, it is a great candidate to serve as a base to be linked with Hb [22]. Even though ZnO has been functionalized with many molecules in other studies that focused on CO 2 capture (such as benzimidazole-based ionic liquid [23], carbon nitride [24], and multiwalled carbon nanotubes and SiO 2 [25]), finding accessible methodologies for achieving a commercial device is a current need [26]. Furthermore, understanding the relationship between the morphology in an inorganic material and the functionalization efficiency with an organic molecule is a topic of great interest for many applications [27].…”

Section: Introductionmentioning

confidence: 99%

Influence of ZnO Morphology on the Functionalization Efficiency of Nanostructured Arrays with Hemoglobin for CO2 Capture

et al. 2022

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In this study, nanostructured ZnO arrays were synthesized by an accessible thermal oxidation (TO) methodology. The Zn films were chemically etched with nitric acid (HNO3) and then oxidized in a furnace at 500 °C for 5 h. Two different morphologies were achieved by modifying the HNO3 concentration in the etching process: (a) ZnO grass-like nanostructures and (b) rod-like nanostructures, with an etching process in HNO3 solution at 2 and 8 M concentration, respectively. The physical and chemical properties of the samples were analyzed by X-ray diffraction (XRD), scanning (SEM) and transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), and Raman spectroscopy. Both morphologies were functionalized with hemoglobin, and a difference was found in the efficiency of functionalization, which was monitored by UV–Vis spectroscopy. The sample with the highest efficiency was the ZnO grass-like nanostructures. Afterward, the capture of carbon dioxide was evaluated by monitoring a sodium carbonate solution interacting with the as-functionalized samples. The evaluation was analyzed by UV–Vis spectroscopy and the results showed a CO2 capture of 98.3% and 54% in 180 min for the ZnO grass-like and rod-like nanostructures, respectively.

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