Peculiarities of the dielectric response of the silver-modified-zeolite porous microstructure

Bunyatova, Ulviye; Koc, S. Ozturk; Orbukh, V. I.; Eyvazova, Goncha M.; Agamaliev, Z. A.; Lebedeva, N. N.; Kocum, Ismail Cengiz; Salamov, B. G.; Özer, Metin

doi:10.1016/j.spmi.2016.08.040

Cited by 5 publications

(1 citation statement)

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“…Zeolites are crystalline microporous aluminosilicates with a well-defined pore topology and high thermal and mechanical stability. Zeolites in a powder or pellet form have been broadly used in catalysis, − adsorption, , and ion exchange. , Developments in zeolite thin films and membranes have also enabled the application of zeolites in membrane-based separation − and thin film-based electronics. − The methods used in the fabrication of zeolite films/membranes can be categorized into two classes. The first class requires the formation of zeolite films/membranes during the crystallization of zeolites, which involves in situ crystallization, − seeded growth, , and dry gel conversion. , The second class requires a zeolite suspension with fully grown crystals, which involves dip coating, , spin-on deposition, − or spray deposition. , The second class avoids the need to expose the substrate to a high-pH environment during zeolite crystal growth, thereby making it possible to deposit zeolites on silicon wafers, ,, glass substrates, , and aluminum alloy. , …”

Section: Introductionmentioning

confidence: 99%

Wetting Properties and Thin-Film Quality in the Wet Deposition of Zeolites

et al. 2019

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Zeolites are microporous crystalline materials widely used in catalysis and adsorption applications. The fabrication of zeolite thin films and membranes has also opened up the possibility of using zeolites in electronic devices and membrane separations. The existing approach to growing zeolite films involves exposing the substrate to a high-pH environment; however, this process is applicable to only specific types of substrates. Our group has developed the direct wet deposition of zeolites via ultrasonic nozzle spray deposition to address this issue; however, the relationship between wetting properties and thin-film quality has yet to be investigated. In this study, we prepared zeolite CHA (Si:Al:P = 3:10:20) suspensions using different solvents and surfactants in various concentrations. We then examined the relationships among the composition of the cast solution, their wetting behavior on the glass substrate, and the uniformity of the resulting thin films. We found that using ethanol as a solvent with zeolite crystals in low concentrations with added surfactant yielded zeolite films of high quality. We were also able to produce low-haze zeolite coatings on glass. The zeolite coatings with high hydrophilicity and adsorption capacity presented excellent antifogging capability.

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