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Cited by 449 publications
(152 citation statements)
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“…Heating the clay resulted in the development of a new band at 3440 cm -j, which was attributed to silanol groups in the tetrahedral layer. A similar observation was reported by Uytterhoeven et al (1965) and Ward (1967) upon heating NH4-Y zeolite. These authors proposed that during the thermal decomposition ofNH4 + ions, Si-O-AI bonds were broken by proton attack, as follows: Figure 5.…”
Section: Characterization O F the Synthetic Beidellitessupporting
confidence: 88%
“…Heating the clay resulted in the development of a new band at 3440 cm -j, which was attributed to silanol groups in the tetrahedral layer. A similar observation was reported by Uytterhoeven et al (1965) and Ward (1967) upon heating NH4-Y zeolite. These authors proposed that during the thermal decomposition ofNH4 + ions, Si-O-AI bonds were broken by proton attack, as follows: Figure 5.…”
Section: Characterization O F the Synthetic Beidellitessupporting
confidence: 88%
“…In general, there are two typical models. One is by Uytterhoeven et al [25] (see in Scheme 1). They thought that the bridged hydroxyls on the zeolitic framework dehydrated to form the tricoordinated framework aluminum as the Lewis acid site, at the same time no dealumination of the zeolitic framework took place.…”
Section: Discussionmentioning
confidence: 99%
“…Acidic behavior is inferred from the physical nature of the source. For example, Brdnsted acidity is inferred from protonic behavior as reflected by infrared spectroscopy (Uytterhoeven et al, 1965), n.m.r, spectroscopy (Trouillaux et al, 1968), or conductometric measurements (Fripiat et al, 1965).…”
Section: Introductionmentioning
confidence: 99%