Molecular sieves SBA-15 type doped with heteropolyacids

Textural and structural properties

A. Popa, V. Sasca, E. E. Kiš, Radmila Martnković-Nedučin, J. Halasz

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In order to be more effective for catalytic reactions, heteropolyacids (HPAs) are usually impregnated on different porous materials with high surface area. Highly dispersed heteropolyacids species, H3PMo 12O40 and H4PVMO11O40 were supported on SBA-15 and Ti- SBA 15 molecular sieves. All supported HPAs were prepared by impregnation using the incipient wetness techniques with a mixture water: ethanol = 1:1. The structure and texture of H3PMo 12O40 and H4PVMo11O40 supported on SBA 15 and Ti- SBA 15 were studied by XRD, FT-IR, low temperature nitrogen adsorption and scanning electron microscopy SEM with EDS. FT-IR studies showed that HPAs anions preserved their Keggin structure after deposition on SBA-15 and Ti- SBA 15 supports. X-ray diffraction and SEM studies confirmed the uniformity of the distribution of active phase in the catalyst samples. The values of specific surface area of both HPAs were increased by deposition on molecular sieve supports. It is found that most of HPMo and HPVMo (active phases) in samples are well dispersed on the support and SBA-15 supported HPA still keeps its Keggin structure. The surface morphology of the SBA-15 supported samples is almost similar to that of SBA-15 support. A relatively uniform distribution of active phase in the support pores was evidenced by EDS analysis.

Original languageEnglish
Pages (from-to)3645-3650
Number of pages6
JournalJournal of Optoelectronics and Advanced Materials
Volume9
Issue number11
Publication statusPublished - Nov 2007

Fingerprint

Molecular sieves
absorbents
Structural properties
Scanning electron microscopy
Energy dispersive spectroscopy
scanning electron microscopy
Impregnation
Specific surface area
Surface morphology
Porous materials
Ethanol
Negative ions
Textures
Nitrogen
Adsorption
X ray diffraction
porous materials
Catalysts
moisture content
ethyl alcohol

Keywords

  • BET
  • Heteropolyacids
  • Molecular sieves
  • SEM
  • Structure
  • Texture
  • XRD

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)

Cite this

Molecular sieves SBA-15 type doped with heteropolyacids : Textural and structural properties. / Popa, A.; Sasca, V.; Kiš, E. E.; Martnković-Nedučin, Radmila; Halasz, J.

In: Journal of Optoelectronics and Advanced Materials, Vol. 9, No. 11, 11.2007, p. 3645-3650.

Research output: Contribution to journalArticle

Popa, A. ; Sasca, V. ; Kiš, E. E. ; Martnković-Nedučin, Radmila ; Halasz, J. / Molecular sieves SBA-15 type doped with heteropolyacids : Textural and structural properties. In: Journal of Optoelectronics and Advanced Materials. 2007 ; Vol. 9, No. 11. pp. 3645-3650.
@article{3cf2cace8b7a43a8813f6b9a66137eb1,
title = "Molecular sieves SBA-15 type doped with heteropolyacids: Textural and structural properties",
abstract = "In order to be more effective for catalytic reactions, heteropolyacids (HPAs) are usually impregnated on different porous materials with high surface area. Highly dispersed heteropolyacids species, H3PMo 12O40 and H4PVMO11O40 were supported on SBA-15 and Ti- SBA 15 molecular sieves. All supported HPAs were prepared by impregnation using the incipient wetness techniques with a mixture water: ethanol = 1:1. The structure and texture of H3PMo 12O40 and H4PVMo11O40 supported on SBA 15 and Ti- SBA 15 were studied by XRD, FT-IR, low temperature nitrogen adsorption and scanning electron microscopy SEM with EDS. FT-IR studies showed that HPAs anions preserved their Keggin structure after deposition on SBA-15 and Ti- SBA 15 supports. X-ray diffraction and SEM studies confirmed the uniformity of the distribution of active phase in the catalyst samples. The values of specific surface area of both HPAs were increased by deposition on molecular sieve supports. It is found that most of HPMo and HPVMo (active phases) in samples are well dispersed on the support and SBA-15 supported HPA still keeps its Keggin structure. The surface morphology of the SBA-15 supported samples is almost similar to that of SBA-15 support. A relatively uniform distribution of active phase in the support pores was evidenced by EDS analysis.",
keywords = "BET, Heteropolyacids, Molecular sieves, SEM, Structure, Texture, XRD",
author = "A. Popa and V. Sasca and Kiš, {E. E.} and Radmila Martnković-Nedučin and J. Halasz",
year = "2007",
month = "11",
language = "English",
volume = "9",
pages = "3645--3650",
journal = "Journal of Optoelectronics and Advanced Materials",
issn = "1454-4164",
publisher = "National Institute of Optoelectronics",
number = "11",

}

TY - JOUR

T1 - Molecular sieves SBA-15 type doped with heteropolyacids

T2 - Textural and structural properties

AU - Popa, A.

AU - Sasca, V.

AU - Kiš, E. E.

AU - Martnković-Nedučin, Radmila

AU - Halasz, J.

PY - 2007/11

Y1 - 2007/11

N2 - In order to be more effective for catalytic reactions, heteropolyacids (HPAs) are usually impregnated on different porous materials with high surface area. Highly dispersed heteropolyacids species, H3PMo 12O40 and H4PVMO11O40 were supported on SBA-15 and Ti- SBA 15 molecular sieves. All supported HPAs were prepared by impregnation using the incipient wetness techniques with a mixture water: ethanol = 1:1. The structure and texture of H3PMo 12O40 and H4PVMo11O40 supported on SBA 15 and Ti- SBA 15 were studied by XRD, FT-IR, low temperature nitrogen adsorption and scanning electron microscopy SEM with EDS. FT-IR studies showed that HPAs anions preserved their Keggin structure after deposition on SBA-15 and Ti- SBA 15 supports. X-ray diffraction and SEM studies confirmed the uniformity of the distribution of active phase in the catalyst samples. The values of specific surface area of both HPAs were increased by deposition on molecular sieve supports. It is found that most of HPMo and HPVMo (active phases) in samples are well dispersed on the support and SBA-15 supported HPA still keeps its Keggin structure. The surface morphology of the SBA-15 supported samples is almost similar to that of SBA-15 support. A relatively uniform distribution of active phase in the support pores was evidenced by EDS analysis.

AB - In order to be more effective for catalytic reactions, heteropolyacids (HPAs) are usually impregnated on different porous materials with high surface area. Highly dispersed heteropolyacids species, H3PMo 12O40 and H4PVMO11O40 were supported on SBA-15 and Ti- SBA 15 molecular sieves. All supported HPAs were prepared by impregnation using the incipient wetness techniques with a mixture water: ethanol = 1:1. The structure and texture of H3PMo 12O40 and H4PVMo11O40 supported on SBA 15 and Ti- SBA 15 were studied by XRD, FT-IR, low temperature nitrogen adsorption and scanning electron microscopy SEM with EDS. FT-IR studies showed that HPAs anions preserved their Keggin structure after deposition on SBA-15 and Ti- SBA 15 supports. X-ray diffraction and SEM studies confirmed the uniformity of the distribution of active phase in the catalyst samples. The values of specific surface area of both HPAs were increased by deposition on molecular sieve supports. It is found that most of HPMo and HPVMo (active phases) in samples are well dispersed on the support and SBA-15 supported HPA still keeps its Keggin structure. The surface morphology of the SBA-15 supported samples is almost similar to that of SBA-15 support. A relatively uniform distribution of active phase in the support pores was evidenced by EDS analysis.

KW - BET

KW - Heteropolyacids

KW - Molecular sieves

KW - SEM

KW - Structure

KW - Texture

KW - XRD

UR - http://www.scopus.com/inward/record.url?scp=38549128917&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38549128917&partnerID=8YFLogxK

M3 - Article

VL - 9

SP - 3645

EP - 3650

JO - Journal of Optoelectronics and Advanced Materials

JF - Journal of Optoelectronics and Advanced Materials

SN - 1454-4164

IS - 11

ER -