Effect of mono- and divalent extra-framework cations on the structure and accessibility of porosity in chabazite zeolites

Doan, Huan V.; Leung, Kwok-Sui; Ting, Valeska P.; Sartbaeva, Asel

doi:10.1039/d0ce01259a

Cited by 5 publications

(4 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is consistent with the observation that frameworks with larger cations exhibit tighter crystallographic spacing and reduced porosities, as indicated by the PXRD results. All framework candidates showed comparable BET surface areas when measured with N 2 at 77 K, but these values were significantly lower than those from CO 2 isotherms (around 20 ± 5 m 2 g −1 , in line with previous research by Doan et al; 32 further details can be found in Figure S2). The highest surface area was achieved by candidates with Rb + (Figure 1d).…”

Section: ■ Results and Discussionsupporting

confidence: 90%

“…All framework candidates showed comparable BET surface areas when measured with N 2 at 77 K, but these values were significantly lower than those from CO 2 isotherms (around 20 ± 5 m 2 g –1 , in line with previous research by Doan et al; 32 further details can be found in Figure S2 ). The highest surface area was achieved by candidates with Rb + ( Figure 1 d).…”

Section: Resultssupporting

confidence: 90%

See 1 more Smart Citation

Impact of Cations and Framework on Trapdoor Behavior: A Study of Dynamic and In Situ Gas Analysis

Yang,

Doan,

O’Hara

et al. 2024

Langmuir

Self Cite

View full text Add to dashboard Cite

Due to their distinct and tailorable internal cavity structures, zeolites serve as promising materials for efficient and specific gas separations such as the separation of /CO 2 from N 2 . A subset of zeolite materials exhibits trapdoor behavior which can be exploited for particularly challenging separations, such as the separation of hydrogen, deuterium, and tritium for the nuclear industry. This study systematically delves into the influence of the chabazite (CHA) and merlinoite (MER) zeolite frameworks combined with different door-keeping cations (K + , Rb + , and Cs + ) on the trapdoor separation behavior under a variety of thermal and gas conditions. Both CHA and MER frameworks were synthesized from the same parent Y-zeolite and studied using in situ X-ray diffraction as a function of increasing temperatures under 1 bar H 2 exposures. This resulted in distinct thermal responses, with merlinoite zeolites exhibiting expansion and chabazite zeolites showing contraction of the crystal structure. Simultaneous thermal analysis (STA) and gas sorption techniques further demonstrated how the size of trapdoor cations restricts access to the internal porosities of the zeolite frameworks. These findings highlight that both the zeolite frameworks and the associated trapdoor cations dictate the thermal response and gas sorption behavior. Frameworks determine the crystalline geometry, the maximum porosities, and displacement of the cation in gas sorption, while associated cations directly affect the blockage of the functional sites and the thermal behavior of the frameworks. This work contributes new insights into the efficient design of zeolites for gas separation applications and highlights the significant role of the trapdoor mechanism.

show abstract

Section: ■ Results and Discussionsupporting

confidence: 90%

Section: Resultssupporting

confidence: 90%

Impact of Cations and Framework on Trapdoor Behavior: A Study of Dynamic and In Situ Gas Analysis

Yang,

Doan,

O’Hara

et al. 2024

Langmuir

Self Cite

View full text Add to dashboard Cite

show abstract

“…The sorption capacity was 2.17, 3.80, 3.77, 3.67, and 3.39 mg g –1 for K + , Cu 2+ , Mn 2+ , Zn 2+ , and Fe 2+ , respectively. Also, we observed a selectivity of sorption (Cu 2+ > Zn 2+ > Fe 2+ > Mn 2+ > K + ) based on physical-chemical parameters, such as load, hydration energy, and hydration radius. − Thus, the lower adsorption of K + is related to its properties (i.e., a monovalent ion with higher radius and hydration energy).…”

Section: Resultsmentioning

confidence: 78%

Biodegradable Enhanced Efficiency Fertilizer Based on Biopolymers/Zeolites Films’ Assembly

Pereira

Fernandes

Souza

et al. 2021

ACS Agric. Sci. Technol.

View full text Add to dashboard Cite

Enhanced efficiency fertilizers (EEFs) have gained ground in the fertilizer trade. However, most of the EEFs marketed are not biodegradable. Therefore, it is necessary to produce EEFs that biodegrade in the soil. In this work, we developed EEFs based on chitosan, carboxymethyl cellulose, and zeolite as support for macro and micronutrients. Zeolite enriched with fertilizer was added to the carboxymethyl cellulose to obtain mono and multielement casting films. Sequentially, for the first time reported in the literature, EEFs were produced from multilayer films by overlapping and hot-pressing. The release of ions, in water and soil, and the biodegradation of the prepared materials and the Basacote were evaluated. The developed EEFs showed similar macro and micronutrient release in water and soil compared with the Basacote, but the developed EEFs showed higher biodegradation. Therefore, we propose a new EEF with efficient results of release in soil, biodegradability, low cost, and easy preparation.

show abstract

“… 30 The SiO 4 and AlO 4 tetrahedra are connected by oxygen atoms. 31 Due to its unique pore and cage structure, LTA zeolite is used to adsorb guest molecules of specific sizes and shapes. 32 In this work, the RA molecules were adsorbed on the electrode surface using LTA zeolite.…”

Section: Introductionmentioning

confidence: 99%

Application of LTA zeolite-modified electrode for sensitive detection of retinoic acid in tap water

et al. 2023

View full text Add to dashboard Cite

show abstract

Effect of mono- and divalent extra-framework cations on the structure and accessibility of porosity in chabazite zeolites

Abstract: The differences in valence and size between extra-framework cations exert a significant effect on the nitrogen sorption ability in the synthesised chabazite zeolites (K-CHA, Cs-CHA, Ca-CHA, Ba-CHA, Sr-CHA and Zn-CHA).

Cited by 5 publications

References 66 publications

Impact of Cations and Framework on Trapdoor Behavior: A Study of Dynamic and In Situ Gas Analysis

Impact of Cations and Framework on Trapdoor Behavior: A Study of Dynamic and In Situ Gas Analysis

Biodegradable Enhanced Efficiency Fertilizer Based on Biopolymers/Zeolites Films’ Assembly

Application of LTA zeolite-modified electrode for sensitive detection of retinoic acid in tap water

Contact Info

Product

Resources

About