Design of MFI Type Aluminum- and Titanium-Containing Zeolites
HZSM-5 (MFI type) of composition (H<sub>x</sub>)[Al<sup>3+</sup><sub>x</sub>Si<sub>12−x</sub>O<sub>24</sub>] × <i>w</i>H<sub>2</sub>O and nanocomposites NA/HZSM-5, NA:<i>M</i>/HZSM-5 (NA—nanoscale anatase...
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MDPI AG
2021-11-01
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| Online Access: | https://www.mdpi.com/2073-4352/11/12/1451 |
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| author | Galina M. Kuz’micheva Elena N. Domoroshchina Galina V. Kravchenko |
| author_facet | Galina M. Kuz’micheva Elena N. Domoroshchina Galina V. Kravchenko |
| author_sort | Galina M. Kuz’micheva |
| collection | DOAJ |
| description | HZSM-5 (MFI type) of composition (H<sub>x</sub>)[Al<sup>3+</sup><sub>x</sub>Si<sub>12−x</sub>O<sub>24</sub>] × <i>w</i>H<sub>2</sub>O and nanocomposites NA/HZSM-5, NA:<i>M</i>/HZSM-5 (NA—nanoscale anatase; <i>M</i> = V, Ni, Ag) with Si/Al = 12, 25, 40, 300 (sp.gr. <i>Pnma</i> or <i>P</i>2<sub>1</sub><i>/n</i>; z = 8), as well as zeolites [(Ti<sup>4+</sup><sub>x</sub>Si<sub>12−x</sub>O<sub>24</sub>] × <i>w</i>H<sub>2</sub>O (TS) with Si/Ti = 47, 53, 73.5 (sp.gr. <i>Pnma</i>) were studied by XRPD, XAS, FTIR-spectroscopy, BET, XPS, SEM, EDX, TPD, UV–VIS-spectroscopy, UV–DRS, and chemiluminescence methods. The results obtained together with photocatalytic, adsorption, antimicrobial, catalytic properties were analyzed using crystallochemical concepts and literature data. It was shown that NA or NA:<i>M</i> introduction into HZSM-5 leads, respectively, to the photodegradation of MeO dye in the UV region or difenoconazole in the visible range, and contributes to the appearance in the dark of adsorption (almost complete extraction of P(V), As(V), and Se(V) from aquatic environment) and bacteriostatic properties in respect to <i>Staphylococcus epidermidis</i>, <i>Bacillus antracoides</i>, and <i>Escherichia coli</i> for NA:Ag/HZSM-5(40, 300). The presence of titanium ions in NA nanoparticles on the HZSM-5 surface improves the catalytic activity in ethanol and propane (the best performance for NA/HZSM-5(25) and NA/HZSM-5(40), respectively) conversion. Determination of the composition (surface and bulk) and structure (statistical and local) of TS zeolites together with the found correlations made it possible to propose new catalysts in the reactions of propane, ethanol, and allyl chloride conversion. |
| first_indexed | 2024-03-10T04:22:06Z |
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| language | English |
| last_indexed | 2024-03-10T04:22:06Z |
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| spelling | doaj.art-95f12883d33f4f3ba8592cc25f76fed92023-11-23T07:47:55ZengMDPI AGCrystals2073-43522021-11-011112145110.3390/cryst11121451Design of MFI Type Aluminum- and Titanium-Containing ZeolitesGalina M. Kuz’micheva0Elena N. Domoroshchina1Galina V. Kravchenko2Institute of Physics and Technology, MIREA—Russian Technological University, Prospekt Vernadskogo 78, 119454 Moscow, RussiaInstitute of Physics and Technology, MIREA—Russian Technological University, Prospekt Vernadskogo 78, 119454 Moscow, RussiaInstitute of Physics and Technology, MIREA—Russian Technological University, Prospekt Vernadskogo 78, 119454 Moscow, RussiaHZSM-5 (MFI type) of composition (H<sub>x</sub>)[Al<sup>3+</sup><sub>x</sub>Si<sub>12−x</sub>O<sub>24</sub>] × <i>w</i>H<sub>2</sub>O and nanocomposites NA/HZSM-5, NA:<i>M</i>/HZSM-5 (NA—nanoscale anatase; <i>M</i> = V, Ni, Ag) with Si/Al = 12, 25, 40, 300 (sp.gr. <i>Pnma</i> or <i>P</i>2<sub>1</sub><i>/n</i>; z = 8), as well as zeolites [(Ti<sup>4+</sup><sub>x</sub>Si<sub>12−x</sub>O<sub>24</sub>] × <i>w</i>H<sub>2</sub>O (TS) with Si/Ti = 47, 53, 73.5 (sp.gr. <i>Pnma</i>) were studied by XRPD, XAS, FTIR-spectroscopy, BET, XPS, SEM, EDX, TPD, UV–VIS-spectroscopy, UV–DRS, and chemiluminescence methods. The results obtained together with photocatalytic, adsorption, antimicrobial, catalytic properties were analyzed using crystallochemical concepts and literature data. It was shown that NA or NA:<i>M</i> introduction into HZSM-5 leads, respectively, to the photodegradation of MeO dye in the UV region or difenoconazole in the visible range, and contributes to the appearance in the dark of adsorption (almost complete extraction of P(V), As(V), and Se(V) from aquatic environment) and bacteriostatic properties in respect to <i>Staphylococcus epidermidis</i>, <i>Bacillus antracoides</i>, and <i>Escherichia coli</i> for NA:Ag/HZSM-5(40, 300). The presence of titanium ions in NA nanoparticles on the HZSM-5 surface improves the catalytic activity in ethanol and propane (the best performance for NA/HZSM-5(25) and NA/HZSM-5(40), respectively) conversion. Determination of the composition (surface and bulk) and structure (statistical and local) of TS zeolites together with the found correlations made it possible to propose new catalysts in the reactions of propane, ethanol, and allyl chloride conversion.https://www.mdpi.com/2073-4352/11/12/1451zeolitesaluminosilicalitestitanosilicalitesnanoscale anatasenanocompositespreparation |
| spellingShingle | Galina M. Kuz’micheva Elena N. Domoroshchina Galina V. Kravchenko Design of MFI Type Aluminum- and Titanium-Containing Zeolites Crystals zeolites aluminosilicalites titanosilicalites nanoscale anatase nanocomposites preparation |
| title | Design of MFI Type Aluminum- and Titanium-Containing Zeolites |
| title_full | Design of MFI Type Aluminum- and Titanium-Containing Zeolites |
| title_fullStr | Design of MFI Type Aluminum- and Titanium-Containing Zeolites |
| title_full_unstemmed | Design of MFI Type Aluminum- and Titanium-Containing Zeolites |
| title_short | Design of MFI Type Aluminum- and Titanium-Containing Zeolites |
| title_sort | design of mfi type aluminum and titanium containing zeolites |
| topic | zeolites aluminosilicalites titanosilicalites nanoscale anatase nanocomposites preparation |
| url | https://www.mdpi.com/2073-4352/11/12/1451 |
| work_keys_str_mv | AT galinamkuzmicheva designofmfitypealuminumandtitaniumcontainingzeolites AT elenandomoroshchina designofmfitypealuminumandtitaniumcontainingzeolites AT galinavkravchenko designofmfitypealuminumandtitaniumcontainingzeolites |