Silicalite-1 Crystals Etched with Hydrofluoric Acid Dissolved in Water or Acetone

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F10%3A00346414" target="_blank" >RIV/61388955:_____/10:00346414 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Silicalite-1 Crystals Etched with Hydrofluoric Acid Dissolved in Water or Acetone

Popis výsledku v původním jazyce

Highly siliceous (Si/Al 350) MFI-type crystals of various sizes and morphologies were etched with HF dissolved either in water or in acetone. The highest concentration of HF used was 4 wt % in water and 5.5 wt % in acetone with etching time shorter than1 h. After rapid etching, the lateral faces of coffin-shaped crystals exhibited differently resistant triangular areas. Slow etching lasting weeks or months was performed in 100 diluted solutions and provided oriented rectangular pits corresponding to the point-group symmetry of MFI structure. Our coffin-shaped crystals were found to be twins of lateral faces as {100} consisting of two pyramidal segments ingrown to the crystal bed. Inner resistant triangle skins were found in calcined crystals indicating preferential deposition of organic residues on the segment interface. Such skins also appeared in small flat monocrystals at the top of the calcined polycrystalline layer.

Název v anglickém jazyce

Silicalite-1 Crystals Etched with Hydrofluoric Acid Dissolved in Water or Acetone

Popis výsledku anglicky

Highly siliceous (Si/Al 350) MFI-type crystals of various sizes and morphologies were etched with HF dissolved either in water or in acetone. The highest concentration of HF used was 4 wt % in water and 5.5 wt % in acetone with etching time shorter than1 h. After rapid etching, the lateral faces of coffin-shaped crystals exhibited differently resistant triangular areas. Slow etching lasting weeks or months was performed in 100 diluted solutions and provided oriented rectangular pits corresponding to the point-group symmetry of MFI structure. Our coffin-shaped crystals were found to be twins of lateral faces as {100} consisting of two pyramidal segments ingrown to the crystal bed. Inner resistant triangle skins were found in calcined crystals indicating preferential deposition of organic residues on the segment interface. Such skins also appeared in small flat monocrystals at the top of the calcined polycrystalline layer.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/IAA400400909" target="_blank" >IAA400400909: Membrány na bázi zeolitů pro membránové reaktory pro konverzi oxidu uhelnatého vodní parou</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Svazek periodika

114

Číslo periodika v rámci svazku

32

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000280727500040

EID výsledku v databázi Scopus

—