AFM and SEM-EDS examination of highly dispersed heteropolyacids supported on MCM 41 and SBA 15 mesoporous materials
Samo za registrovane korisnike
2009
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Heteropolyacids (HPAS) H(3)PMo(12)O(40) (HPM) and H(4)PVMo(11)O(40) (HPVM) supported on mesoporous pure-silica and Al, Fe modified molecular sieve MCM-41 and SBA-15 have been prepared and characterized by atomic force microscopy (AFM) and scanning electron microscopy (SEM) with EDS. All supported HPAs were prepared by impregnation using the incipient wetness techniques with a mixture of water: ethanol = 1:1. AFM features show that nanoclusters of HPA-molecular sieves composites of various heights were formed on the surface. The morphology of the pure molecular sieves and HPA-molecular sieves composites surface, respectively, has an island-like structure. SEM studies confirmed the uniformity of the distribution of active phase in the supported samples. It is found that most of HPM and HPVM (active phases) in supported samples are well dispersed on all supports. HPAs supported on MCM-41 ans SBA-15 have still kept their Keggin structure. A relatively uniform distribution of active phase i...n the supports pores was confirmed by EDS analysis.
Ključne reči:
molecular sieves / heteropolyacids / ATM / SEM-EDSIzvor:
Journal of Optoelectronics and Advanced Materials, 2009, 11, 8, 1185-1190Izdavač:
- Natl Inst Optoelectronics, Bucharest-Magurele
Institucija/grupa
IHTMTY - JOUR AU - Popa, A. AU - Holclajtner-Antunovic, I. AU - Vasiljević-Radović, Dana AU - Sasca, V. PY - 2009 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/511 AB - Heteropolyacids (HPAS) H(3)PMo(12)O(40) (HPM) and H(4)PVMo(11)O(40) (HPVM) supported on mesoporous pure-silica and Al, Fe modified molecular sieve MCM-41 and SBA-15 have been prepared and characterized by atomic force microscopy (AFM) and scanning electron microscopy (SEM) with EDS. All supported HPAs were prepared by impregnation using the incipient wetness techniques with a mixture of water: ethanol = 1:1. AFM features show that nanoclusters of HPA-molecular sieves composites of various heights were formed on the surface. The morphology of the pure molecular sieves and HPA-molecular sieves composites surface, respectively, has an island-like structure. SEM studies confirmed the uniformity of the distribution of active phase in the supported samples. It is found that most of HPM and HPVM (active phases) in supported samples are well dispersed on all supports. HPAs supported on MCM-41 ans SBA-15 have still kept their Keggin structure. A relatively uniform distribution of active phase in the supports pores was confirmed by EDS analysis. PB - Natl Inst Optoelectronics, Bucharest-Magurele T2 - Journal of Optoelectronics and Advanced Materials T1 - AFM and SEM-EDS examination of highly dispersed heteropolyacids supported on MCM 41 and SBA 15 mesoporous materials VL - 11 IS - 8 SP - 1185 EP - 1190 UR - https://hdl.handle.net/21.15107/rcub_cer_511 ER -
@article{ author = "Popa, A. and Holclajtner-Antunovic, I. and Vasiljević-Radović, Dana and Sasca, V.", year = "2009", abstract = "Heteropolyacids (HPAS) H(3)PMo(12)O(40) (HPM) and H(4)PVMo(11)O(40) (HPVM) supported on mesoporous pure-silica and Al, Fe modified molecular sieve MCM-41 and SBA-15 have been prepared and characterized by atomic force microscopy (AFM) and scanning electron microscopy (SEM) with EDS. All supported HPAs were prepared by impregnation using the incipient wetness techniques with a mixture of water: ethanol = 1:1. AFM features show that nanoclusters of HPA-molecular sieves composites of various heights were formed on the surface. The morphology of the pure molecular sieves and HPA-molecular sieves composites surface, respectively, has an island-like structure. SEM studies confirmed the uniformity of the distribution of active phase in the supported samples. It is found that most of HPM and HPVM (active phases) in supported samples are well dispersed on all supports. HPAs supported on MCM-41 ans SBA-15 have still kept their Keggin structure. A relatively uniform distribution of active phase in the supports pores was confirmed by EDS analysis.", publisher = "Natl Inst Optoelectronics, Bucharest-Magurele", journal = "Journal of Optoelectronics and Advanced Materials", title = "AFM and SEM-EDS examination of highly dispersed heteropolyacids supported on MCM 41 and SBA 15 mesoporous materials", volume = "11", number = "8", pages = "1185-1190", url = "https://hdl.handle.net/21.15107/rcub_cer_511" }
Popa, A., Holclajtner-Antunovic, I., Vasiljević-Radović, D.,& Sasca, V.. (2009). AFM and SEM-EDS examination of highly dispersed heteropolyacids supported on MCM 41 and SBA 15 mesoporous materials. in Journal of Optoelectronics and Advanced Materials Natl Inst Optoelectronics, Bucharest-Magurele., 11(8), 1185-1190. https://hdl.handle.net/21.15107/rcub_cer_511
Popa A, Holclajtner-Antunovic I, Vasiljević-Radović D, Sasca V. AFM and SEM-EDS examination of highly dispersed heteropolyacids supported on MCM 41 and SBA 15 mesoporous materials. in Journal of Optoelectronics and Advanced Materials. 2009;11(8):1185-1190. https://hdl.handle.net/21.15107/rcub_cer_511 .
Popa, A., Holclajtner-Antunovic, I., Vasiljević-Radović, Dana, Sasca, V., "AFM and SEM-EDS examination of highly dispersed heteropolyacids supported on MCM 41 and SBA 15 mesoporous materials" in Journal of Optoelectronics and Advanced Materials, 11, no. 8 (2009):1185-1190, https://hdl.handle.net/21.15107/rcub_cer_511 .