Modification and functionalization of zeolites to improve the efficiency of CO2 adsorption: A review

Bahmanzadegan, Fatemeh; Ghaemi, Ahad

doi:10.1016/j.cscee.2023.100564

Cited by 11 publications

(1 citation statement)

References 107 publications

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“…The extraordinary physicochemical properties of zeolite minerals are summarized as follows: (1) Adsorption property: After eliminating zeolitic water by heating, the cavities and channels inside the zeolite will be "vacant"; therefore, zeolites exhibit a fairly strong adsorption force towards gases and vapors. They possess a high affinity for polar molecules such as H 2 O and CO 2 and have excellent adsorption performance under the combined action of the dispersion force and electrostatic force [68]. Zeolite minerals are widely used in industry to prepare adsorbents and desiccants for the adsorption and separation of target gases/liquids [69].…”

Section: Physicochemical Properties Of Zeolitementioning

confidence: 99%

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Zhou,

Wang,

Shen

et al. 2024

Catalysts

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One of the most challenging problems for people around the world is the lack of clean water. In the past few decades, the massive discharge of emerging organic pollutants (EOPs) into natural water bodies has exacerbated this crisis. Considerable research efforts have been devoted to removing these EOPs due to their biotoxicity at low concentrations. Heterogeneous photocatalysis via coupling clay minerals with nanostructured semiconductors has proven to be an economical, efficient, and environmentally friendly technology for the elimination of EOPs in drinking water and watershed water. Natural zeolite minerals (especially clinoptilolites) are regarded as appropriate supports for semiconductor-based photocatalysts due to their characteristics of having a low cost, environmental friendliness, easy availability, co-catalysis, etc. This review summarizes the latest research on clinoptilolites used as supports to prepare binary and ternary metal oxide or sulfide semiconductor-based hybrid photocatalysts. Various preparation methods of the composite photocatalysts and their degradation efficiencies for the target contaminants are introduced. It is found that the good catalytic activity of the composite photocatalyst could be attributed to the synergistic effect of combining the clinoptilolite adsorbent with the semiconductor catalyst in the heterogeneous system, which could endow the composites with an excellent adsorption capacity and produce more e−/h+ pairs under suitable light irradiation. Finally, we highlight the serious threat of EOPs to the ecological environment and propose the current challenges and limitations, before putting the zeolite mineral composite photocatalysts into practice. The present work would provide a theoretical basis and scientific support for the application of zeolite-based photocatalysts for degrading EOPs.

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Section: Physicochemical Properties Of Zeolitementioning

confidence: 99%

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Zhou,

Wang,

Shen

et al. 2024

Catalysts

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Temperature‐Induced Modifications in Natural Zeolite Clinoptilolite: Effects on Acidity and Catalytic Acetalization

Muhammad,

Al‐Muqati,

Schulz

et al. 2024

ChemNanoMat

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This study delves into the acid modification of natural zeolite clinoptilolite, focusing on the identification of acid site types and their catalytic activity in the Brønsted acid‐catalyzed acetalization of benzaldehyde with 1,3‐butanediol. Following calcination, the samples underwent acidification via ammonium‐ion exchange, resulting in approximately 45% of the clinoptilolite cations being exchanged with ammonium ions. The investigation evaluates the structural, morphological, and textural alterations induced by this modification using XRD, FTIR, and nitrogen adsorption‐desorption measurements. Ammonia‐temperature‐programmed desorption (NH3‐TPD) analysis confirms the presence of medium to strong acidic protons, highlighting the acidity of the modified samples. Employing 27Al and 29Si magic‐angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy elucidated changes in the state and coordination of aluminum post‐sample activation. Specifically, the 27Al MAS NMR spectra indicate a partial dealumination, evidenced by the emergence of 5 and 6‐fold coordinated aluminum. Moreover, 29Si MAS NMR measurements tracked variations in the Si/Al ratio. The study probes the nature of these sites, their influence on catalytic activity, and the synergistic interplay between Brønsted acid sites and 5‐fold coordinated aluminum. The results showcase that the prepared acidic natural clinoptilolite catalysts augment acidity and porosity, fostering promising implications for catalytic applications.

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The interactions between zeolite and two cellulose derivatives: A comprehensive analysis of liquid and solid phase properties

Matusiak,

Grządka,

Maciołek

et al. 2024

Carbohydrate Polymers

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Modification and functionalization of zeolites to improve the efficiency of CO2 adsorption: A review

Cited by 11 publications

References 107 publications

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Temperature‐Induced Modifications in Natural Zeolite Clinoptilolite: Effects on Acidity and Catalytic Acetalization

The interactions between zeolite and two cellulose derivatives: A comprehensive analysis of liquid and solid phase properties

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