Chromium has been substituted successfully in a silicalite structure for the first time in acidic medium. A combined application of cyclic voltammetry (Et/2 = + 588 mV vs. standard calomel electrode) and electron spin resonance reveals that both Cr ~รท and Cr 5รท are present as part of the structure w
Synthesis and characterization of tantalum silicalite molecular sieves with MFI structure
โ Scribed by Yong Sig Ko; Wha Seung Ahn
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 342 KB
- Volume
- 30
- Category
- Article
- ISSN
- 1387-1811
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A series of mono-and bifunctional titanium-molecular sieves containing different trivalent ions, e.g. Al 3รพ , B 3รพ and Ga 3รพ with MFI, BEA and MCM-41 topologies has been prepared and characterized. Various techniques including XRD, N 2 adsorption, UV-visible and MAS-NMR were used to monitor the phys
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