AIPO4-based molecular sieves synthesized in the presence of di-n-propylamine: Are the structures related?

Ojo, Adeola F.; McCusker, Lynne B.

doi:10.1016/s0144-2449(05)80118-6

Cited by 47 publications

(25 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dierent morphologies, characteristic for each structure were obtained, in agreement with the literature [27,32]. The pictures of representative polycrystalline aggregates obtained in our study are given in Fig.…”

Section: Synthesis Of Vapo-11 Materialssupporting

confidence: 88%

On the synthesis of vanadium containing molecular sieves by experimental design from a VOSO4·5H2O·Al(iPrO)3·Pr2NH·H2O gel: occurrence of VAPO-41 as a secondary structure in the synthesis of VAPO-11

Frunză¹,

Voort²,

Vansant³

et al. 2000

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

Section: Synthesis Of Vapo-11 Materialssupporting

confidence: 88%

On the synthesis of vanadium containing molecular sieves by experimental design from a VOSO4·5H2O·Al(iPrO)3·Pr2NH·H2O gel: occurrence of VAPO-41 as a secondary structure in the synthesis of VAPO-11

Frunză¹,

Voort²,

Vansant³

et al. 2000

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

“…There is a characteristic weight loss between 200 C and 300 C temperature with exothermic peak is assigned to decomposition of Pd (OH) 2 into PdO species. 13 This is the most supportive evidence for the formation of PdO species (Fig. 4).…”

Section: Resultssupporting

confidence: 63%

PALLDIUM SUPPORTED MCM-41 MESOPOROUS MOLECULAR SIEVES: SYNTHESIS, CHARACTERIZATION AND CATALYTIC TEST FOR THE REDUCTION OF NO BY CO

Ravat

Aghalayam

2011

Int. J. Nanosci.

View full text Add to dashboard Cite

Palladium supported MCM-41 molecular sieves with Si/Pd (molar) ratios of 400, 200, 100 and 50 were synthesized by hydrothermal method. All catalysts characterized by various analytical and spectroscopic techniques, viz, XRD, N 2 sorption, TEM, DRUV-VIS, Raman. XRD at low angle and high angle studies suggest that the substitution of palladium and presence of palladium oxide phase in the silicate tetrahedral framework structure of MCM-41. TEM investigations con¯rm the highly ordered cubic structure with irregular distribution of palladium nanoparticles on surface PdMCM-41. DRUV-VIS and Raman spectra studies indicate the presence of palladium oxide moieties in all PdMCM-41 catalysts. The e®ect of Si/Pd molar ratio, particle size and reusability with respect to reactor temperature on the catalytic activity of PdMCM-41 catalyst was examined. Comparative study of all these palladium substituted catalysts shows that PdMCM-41(50) catalyst having higher palladium contents shows higher activity at lower temperatures as compared with other PdMCM-41 (Si/Pd ¼ 100, 200, 400) catalysts.

show abstract

“…9 Thus, optimizing the synthesis parameters for a given structure type to crystallize pure materials is extremely difficult. The gel composition, pH, temperature, and duration of heating influence the crystallinity and purity of these structures.…”

Section: Discussionmentioning

confidence: 99%

“…The hightemperature weight loss is assigned to the desorption and decomposition of protonated amines, balancing the framework negative charge. 9 The high-temperature weight loss is more prominent in SAPO-41 and CoAPSO-41 than in CoAPO-41. Being a neutral framework, AlPO 4 -41 does not require any protonated amines in its channels, which explains the absence of such a high-temperature weight loss in this material.…”

Section: Synthesismentioning

confidence: 93%

Synthesis, Characterization, and Adsorbate Interactions of CoAPO-41 and CoAPSO-41 Molecular Sieves

1997

View full text Add to dashboard Cite

Two novel medium pore cobalt-substituted aluminophosphate molecular sieves CoAPO-41 and CoAPSO-41 have been synthesized hydrothermally using di-n-propylamine as the organic template. These materials have been characterized by various physical methods including XRD, TGA, SEM, electron microprobe analysis, 27 Al, 29 Si, and 31 P MAS NMR, UV-visible, and ESR spectroscopies. Substitution of cobalt into the framework has been established. Cobalt in CoAPO/CoAPSO-41 after calcination in O 2 and subsequent dehydration and H 2 treatment at high temperature activates molecular oxygen by forming a peroxocobalt adduct Co-O-O • . The peroxo species is unstable at temperatures above 573 K. Adsorption of molecules such as D 2 O, ND 3 , CH 3 OD, and CO on CoAPO/CoAPSO-41 materials after calcination, dehydration, and high-temperature hydrogen treatment forms complexes with Co(II) from the framework as revealed by ESR measurements at 4.5 and 77 K.

show abstract

AIPO4-based molecular sieves synthesized in the presence of di-n-propylamine: Are the structures related?

Cited by 47 publications

References 8 publications

On the synthesis of vanadium containing molecular sieves by experimental design from a VOSO4·5H2O·Al(iPrO)3·Pr2NH·H2O gel: occurrence of VAPO-41 as a secondary structure in the synthesis of VAPO-11

On the synthesis of vanadium containing molecular sieves by experimental design from a VOSO4·5H2O·Al(iPrO)3·Pr2NH·H2O gel: occurrence of VAPO-41 as a secondary structure in the synthesis of VAPO-11

PALLDIUM SUPPORTED MCM-41 MESOPOROUS MOLECULAR SIEVES: SYNTHESIS, CHARACTERIZATION AND CATALYTIC TEST FOR THE REDUCTION OF NO BY CO

Synthesis, Characterization, and Adsorbate Interactions of CoAPO-41 and CoAPSO-41 Molecular Sieves

Contact Info

Product

Resources

About