Studies on the synthesis of ETS-10 I. Influence of synthesis parameters and seed content

Das, Tapan K.; Chandwadkar, A.J.; Budhkar, A. P.; Belhekar, A.A.; Sivasanker, S.

doi:10.1016/0927-6513(95)00005-t

Cited by 41 publications

(21 citation statements)

References 7 publications

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“…The Raman spectrum agreed closely with that reported by Ashketar et al (1998) and Su et al (2000), but differed decidedly from that published by Mihailova et al (1996) which presented a main peak at 490 cm 1 together with a broad and strong peak at 782 cm 1 . The IR spectrum also differed from that reported by Mihailova et al, although it agreed roughly with those reported by Yang et al (2001) and Das et al (1995). The Raman spectrum was dominated by a very strong peak centred at 727 cm 1 , minor peaks at 1119, 992, 982, 879 and 637 cm 1 and a quite strong complex peak at 306 cm 1 , with less-defined features occurring at 537, 464, 422, 345, 203, 175, 158 and 117 cm 1 .…”

Section: Vibrational Characterizationsupporting

confidence: 88%

Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve

Bagnasco

Turco

Busca

et al. 2003

Adsorption Science & Technology

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A sample of ETS-10 was prepared and characterized by spectroscopic (Raman, UV-vis, FT-IR) and TPD techniques. An interpretation of the vibrational spectra was proposed. Absorption in the UV-vis range was typical of charge-transfer transitions involving octahedral Ti. No surface-OH groups were detected on the dehydrated sample. FT-IR measurements showed that water was adsorbed in two different molecular modes while ammonia was adsorbed coordinatively and mostly desorbed below 600 K. These results were confirmed by TPD studies that showed hydrogen-bonded water and water coordinated to Na and K cations located in the main channels of ETS-10. Ammonia TPD measurements on the hydrated material provided evidence for two forms of adsorbed NH 3 , both bonded to water molecules. On the anhydrous material, NH 3 was probably coordinated only to the more loosely bonded Na and K ions in the main channels of ETS-10. The amount of adsorbed NH 3 was markedly reduced after heat treatment that led to a partial loss of crystallinity.

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Section: Vibrational Characterizationsupporting

confidence: 88%

Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve

Bagnasco

Turco

Busca

et al. 2003

Adsorption Science & Technology

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“…4c. The crystals of the synthesis mixture produced at 528 K (AM-6-I-528K) formed more of a rectangular shape in comparison with AM-6-I that was synthesized at 503 K. Furthermore, increasing the temperature led to a decrease in the crystallization time in accordance with the thermodynamic expectations [33]. The crystallization time was 2 h for standard composition while 1 h was enough for crystallization at 528 K. This can be explained by triggering the acceleration of formation of primary nucleation at higher temperatures due to the enhanced interaction frequency of nutrients [23].…”

Section: Resultssupporting

confidence: 79%

“…The 2 h time frame used for standard composition used for the crystallization had to be extended at least to 5 h to achieve crystallization in the diluted solution, which is consistent with the results of Ji et al [34,35]. Increasing the water content results in an increase in the crystallization time, decrease the crystallization rate, and lower the supersaturation level [33]. In the primary nucleation step, fewer nuclei are formed causing larger crystals to grow.…”

Section: Resultssupporting

confidence: 66%

Secondary growth of microporous vanadosilicate AM-6 films

2016

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Oriented vanadosilicate AM-6 thin films with an average thickness of 1-2 lm were prepared on the ITO coated glass substrates using secondary growth method with a partial a(b)-out-of-plane preferred crystal orientation for the first time. In secondary growth method, titanosilicate ETS-10 crystals were deposited on the substrate from a colloidal suspension to form seed layers. Then, the hydrothermal growth of the seed crystals was conducted to form AM-6 films. It was observed that the AM-6 films formed possess similar 1-D VO 3 2-quantum wires as also observed in powder AM-6 crystals. Afterward, the effect of reaction temperature and amount of water in the secondary growth gel on crystal morphology and a(b)-out-of-plane crystallographic preferred orientation (CPO) were investigated to gain a better understanding of the secondary growth mechanism of vanadosilicate AM-6 films. The results suggested that the increased amount of water leads to increased CPO in the AM-6 films, whereas an increase in reaction temperature from 503 to 528 K leads to more c-oriented AM-6 films with a decreased CPO value. Furthermore, an increase in the reaction temperature led to a decrease in the reaction time, resulting in the formation of quartz impurity. Accordingly, well intergrown a(b)-out-of-plane oriented vanadosilicate films were grown for the first time using ETS-10 seed crystals and it is believed that this work provides an effective pathway for controlling the synthesis of AM-6 films expanding the possible range of applications of these materials possessing 1-D quantum wires.

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“…[17] Sodium silicate solutions and fumed and colloidal silica are suitable silicon sources. [20] Most porous titanosilicates and other related new materials reported to date can be synthesised without the addition of any organic template molecules. [17] The synthesis of ETS-10 usually (although not always) requires the presence in the parent gel of both Na ϩ and K ϩ ions.…”

Section: Synthesismentioning

confidence: 99%

Microporous Titanosilicates and other Novel Mixed Octahedral-Tetrahedral Framework Oxides

Rocha

Anderson²

2000

Eur. J. Inorg. Chem.

289

158

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Stable microporous materials, such as zeolites, are extremely important for applications in catalysis, adsorption, ion‐exchange, and separation. In this review we describe a new class of stable microporous materials that involves novel mixed octhaedral‐tetrahedral framework oxides. The archetypal material is based on titanosilicates, although there is tremendous scope for introducing many other transition metals. These materials not only have potential novel applications in the fields normally associated with zeolites but also possible applications in the areas of optoelectronics, nonlinear optics, batteries, magnetic materials and sensors.

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Studies on the synthesis of ETS-10 I. Influence of synthesis parameters and seed content

Cited by 41 publications

References 7 publications

Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve

Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve

Secondary growth of microporous vanadosilicate AM-6 films

Microporous Titanosilicates and other Novel Mixed Octahedral-Tetrahedral Framework Oxides

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