One-step ionothermal synthesis of oriented molecular sieve corrosion-resistant coatings

Yu, Tongwen; Chu, Wenling; Cai, Rui; Yang, Weishen

doi:10.1016/j.micromeso.2018.01.030

Cited by 8 publications

(5 citation statements)

References 42 publications

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“…Crystallization temperatures range from 100 to 210 °C [86,96,104,108,112,113,117,118]. Additionally, as reported by Yu et al [116] in the ionothermal synthesis of AlPO 4 -11 material coating formed by interface chemistry of substratesolution and leading to superior corrosion-resistant performance, increasing the temperature leads to the formation of almost only the dense phase.…”

Section: The Effect Of Il's Cation Size Shape or Lengthmentioning

confidence: 86%

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A review on ionothermal synthesis of zeolites and zeotype materials

Fortas,

Boukoussa,

Hasnaoui

et al. 2024

Phys. Scr.

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Known as green inorganic products and environmentally beneficial, ionic liquids (ILs) are increasingly used in the ionothermal synthesis of zeolites and zeotype materials compared to the hydrothermal method. This safe and successful process offers new opportunities to produce several molecular sieves with different morphologies and structures for promising applications.In this review, we summarize the history of the most successful phases of zeolites and zeotype materials, with different structures such as AEL, AEI, AFI, AST, ATS, CHA, -CLO, ITW, LEV, LTA, MFI, MTN, MTT, SOD, TON, IRR, and STW, from ILs discovery until 2022. The use of the ionothermal method compared to the hydrothermal route is evaluated and reported in this paper, besides synthesis parameters affecting the final product formation, such as IL dosage, cation size and shape, water content, (P, Si, F, IL/Al) ratios, crystallization time and temperature, mineralizing agent, Me/Al ratio, the addition of a secondary template (co-SDA), the use of IL as both SDA and solvent, competition in forming the framework, and the use of eutectic mixture and deep eutectic solvent (DES). Furthermore, we collected the various applications of these materials and highlighted the advantages of the ionothermal process, offering a comprehensive understanding of this topic.

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Section: The Effect Of Il's Cation Size Shape or Lengthmentioning

confidence: 86%

“…Crystallization time and temperature are two parameters usually studied due to their importance in changing the final product phase [116]. As seen from table 3, crystallization times range from minutes or hours favoring rapid crystallization and some days for zeotypes, to long days for zeolite preparation.…”

Section: The Effect Of Il's Cation Size Shape or Lengthmentioning

confidence: 99%

A review on ionothermal synthesis of zeolites and zeotype materials

Fortas,

Boukoussa,

Hasnaoui

et al. 2024

Phys. Scr.

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“…In situ crystallization is able to coat complex geometries and narrow and confined cavities, making it a desirable coating approach for irregularly shaped components. Different in situ crystallization approaches have been proposed: hydrothermal (H-InC) [29,30,41], ionothermal (I-InC) [42,43], and dry-gel conversion (DGC) [44,45] crystallization methods.…”

Section: Anti-corrosion Zeolite Coatingsmentioning

confidence: 99%

“…Better anti-corrosion performances were observed for the SAPO-11 coating, although the results were not as effective as observed for hydrothermal synthesis (Table 1). Most recently Yu et al [43] investigated oriented ALPO-11 films as corrosion-resistant coatings, using a one-step ionothermal synthesis on aluminum substrates. Their results evidenced that the corrosion-resistant performance of the zeolite coating induced a corrosion current on the coated Al sample about three orders of magnitude lower than that uncoated one, reflecting a much more effective passive corrosion behavior.…”

Section: Anti-corrosion Zeolite Coatingsmentioning

confidence: 99%

Anticorrosion Behavior of Zeolite Coatings Obtained by In Situ Crystallization: A Critical Review

Calabrese

2018

Materials

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Zeolites are crystalline nanoporous aluminosilicates. Thanks to their intrinsically nanoporous structure they are widely used as molecular sieves, for exchanging ions, or, also thanks to the high surface area of these structures, for catalytic applications. Furthermore, thanks to their thermal and chemical stability, in recent years zeolite coatings have been evaluated for application as anti-corrosion coatings. The non-toxicity of this class of coatings makes it possible that they will be an environmentally friendly alternative to conventional chromate-based coatings. This article provides a brief review of the anti-corrosion performance of zeolite coatings, applied by direct synthesis technique to several metals and alloys, as discussed in the literature. After a short description of the microstructure and properties of zeolites, the discussion addresses the research activities related to this topic, as reported in the literature. Comparative analysis of literature results supported the dry-gel conversion method as a promising approach that combines a simplified synthesis procedure with anti-corrosion coating performance. Based on these considerations, an evaluation of future trends is discussed along with the final remarks.

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“…The nuclei tended to grow parallel to the substrate surface and cover the suitable available space. Then they eventually developed into highly in-plane oriented and compact coatings 41. F I G U R E 6 SEM images of PtZn@S-1-R catalyst with different crystallization time.…”

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confidence: 99%

Hydrothermal synthesis of highly cross‐linked PtZn@Silicalite‐1 structured catalysts for propane dehydrogenation

Xia,

Zhang,

Hou

et al. 2024

AIChE Journal

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Structured catalysts coatings exhibit excellent performance on non‐adiabatic gas–solid process, deriving from their enhanced heat and mass transfer properties. However, the coating catalysts prepared by traditional hydrothermal method of zeolite encapsulating noble metal are prone to spalling, especially under conditions of large flow rate and high temperature. Herein, we prepared PtZn clusters encapsulated in silicalite‐1 zeolite coating on stainless steel with high bonding strength by an improved in situ growth method. The optimized catalyst exhibited ultra‐thin, uniform, continuous, and high degree of crosslinking, thereby enhancing mass transfer and thermal stability. In propane dehydrogenation reaction, the optimized PtZn@S‐1‐R showed a high specific activity of 14.7 molPt−1 s−1 and a propylene selectivity above 99% at 600°C with a high weight hourly space velocity of 120 h−1. The metal‐encapsulated zeolite coating catalysts broaden the application avenue for heterogeneous catalysis with great application prospects.

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One-step ionothermal synthesis of oriented molecular sieve corrosion-resistant coatings

Cited by 8 publications

References 42 publications

A review on ionothermal synthesis of zeolites and zeotype materials

A review on ionothermal synthesis of zeolites and zeotype materials

Anticorrosion Behavior of Zeolite Coatings Obtained by In Situ Crystallization: A Critical Review

Hydrothermal synthesis of highly cross‐linked PtZn@Silicalite‐1 structured catalysts for propane dehydrogenation

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