Self-seeded growth of very large open-structured zeolite nanosheet assemblies with extraordinary micropore accessibility

Cao, Zishu; Iskhakova, Landysh; Sun, Xinhui; Anjikar, Ninad D.; Yang, Sheng; Dong, Junhang

doi:10.1016/j.micromeso.2022.111854

Cited by 5 publications

(1 citation statement)

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“…As shown in Table 1 , the BET surface area was 518 ± 17 m 2 /g for the calcined ZNs, which is typical for fully activated MFI ZNs [ 14 , 15 ]. The BET surface areas were <150 m 2 /g for the piranha solution-treated samples, which were only slightly greater than the nonactivated sample (97 m 2 /g).…”

Section: Resultsmentioning

confidence: 97%

A Study on the Synthesis and Proton Transport Behavior of Multilayered ZSM-5 Zeolite Nanosheet Membranes Laminated on Polymer Substrates

et al. 2023

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Single crystalline ZSM-5 ZNs with thicknesses around 6 nm were obtained by secondary growth of silicalite nanoparticles using diquaternary bis-1,5(tripropyl ammonium) pentamethylene diiodide (dC5) as a structure-directing agent (SDA). The dC5 could be effectively removed from the ZN pores by either high-temperature calcination or UV irradiation in air at room temperature but not by the piranha solution treatment. Ultrathin ZN-laminated membranes (ZNLMs) were fabricated by sandwiching a UV-activated multilayered ZN film between two recast Nafion® layers (ZNLM-Nafion) and by filtration coating from a suspension of thermally activated ZNs on a nonionic porous PVDF (ZNLM-PVDF). The ZNLMs on both supports demonstrated the ability of highly proton-selective ion conduction with low resistances in aqueous electrolyte solutions. The ZNLM-PVDF with PVDF binder was structurally stable, and it achieved a comparably low ASR but much higher proton selectivity compared with a Nafion membrane of same overall thickness. However, detachment between the ZNLM and Nafion layers occurred when the ZNLM-Nafion operated in aqueous electrolyte solutions. Results of this study show the potential for developing ZNLMs as efficient proton-conducting membranes without using expensive ionic polymer matrices. However, the development of polymer-supported ZNLMs is hindered by the current inefficiency in preparing well-dispersed suspensions of open-pore ZNs. Future development of efficient methods for synthesizing open-pore ZNs in dispersed states is key to realizing high-performance ZNLMs on polymers.

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Section: Resultsmentioning

confidence: 97%