Thermal analysis of large pore microporous zincophosphates

Luz Arcelia García-Serrano; Fernando Rey; Joaquín Pérez-Pariente; Enrique Sastre

doi:10.1016/S0040-6031(01)00564-0

Thermal analysis of large pore microporous zincophosphates

Luz Arcelia García-Serrano, Fernando Rey, Joaquín Pérez-Pariente, Enrique Sastre

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Samples of tridimensional microporous zinc phosphates with fully connected framework with faujasite (FAU) and chiral zincophosphate (CZP) structures have been prepared and characterized by thermal analyses comprising TGA, TGA-MS and in situ thermal XRD. They have been also characterized by ICP and ¹³C MAS NMR. Analyses of the ZnPO-FAU demonstrate that the tetramethylammonium (TMA⁺) cations are incorporated preferentially in the β-cages and that this material is stable up to 673 K. The crystallinity of the sample only decreases when the TMA⁺ cations located in the β-cages are eliminated (above ∼723 K). In the case on ZnPO-CZP the thermal removal of the water more strongly held by the structure produces a marked decrease of crystallinity at ∼523 K

Original language	English
Pages (from-to)	155-162
Number of pages	8
Journal	Thermochimica Acta
Volume	376
Issue number	2
DOIs	https://doi.org/10.1016/S0040-6031(01)00564-0
State	Published - 7 Sep 2001
Externally published	Yes

Keywords

Crystalline microporous zincophosphates
In situ thermal XRD
Thermal stability

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10.1016/S0040-6031(01)00564-0

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title = "Thermal analysis of large pore microporous zincophosphates",

abstract = "Samples of tridimensional microporous zinc phosphates with fully connected framework with faujasite (FAU) and chiral zincophosphate (CZP) structures have been prepared and characterized by thermal analyses comprising TGA, TGA-MS and in situ thermal XRD. They have been also characterized by ICP and 13C MAS NMR. Analyses of the ZnPO-FAU demonstrate that the tetramethylammonium (TMA+) cations are incorporated preferentially in the β-cages and that this material is stable up to 673 K. The crystallinity of the sample only decreases when the TMA+ cations located in the β-cages are eliminated (above ∼723 K). In the case on ZnPO-CZP the thermal removal of the water more strongly held by the structure produces a marked decrease of crystallinity at ∼523 K",

keywords = "Crystalline microporous zincophosphates, In situ thermal XRD, Thermal stability",

author = "Garc{\'i}a-Serrano, {Luz Arcelia} and Fernando Rey and Joaqu{\'i}n P{\'e}rez-Pariente and Enrique Sastre",

note = "Funding Information: The authors acknowledge the CICYT of Spain for financial support within the Project MAT97-1207. L.A. Garc{\'ı}a-Serrano acknowledges the AECI and the Instituto de Cat{\'a}lisis y Petroleoqu{\'ı}mica Ph.D. Grants. The help of Dr. T. Blasco in collecting and discussing the NMR results is gratefully acknowledged.",

year = "2001",

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T1 - Thermal analysis of large pore microporous zincophosphates

AU - García-Serrano, Luz Arcelia

AU - Rey, Fernando

AU - Pérez-Pariente, Joaquín

AU - Sastre, Enrique

N1 - Funding Information: The authors acknowledge the CICYT of Spain for financial support within the Project MAT97-1207. L.A. Garcı́a-Serrano acknowledges the AECI and the Instituto de Catálisis y Petroleoquı́mica Ph.D. Grants. The help of Dr. T. Blasco in collecting and discussing the NMR results is gratefully acknowledged.

PY - 2001/9/7

Y1 - 2001/9/7

N2 - Samples of tridimensional microporous zinc phosphates with fully connected framework with faujasite (FAU) and chiral zincophosphate (CZP) structures have been prepared and characterized by thermal analyses comprising TGA, TGA-MS and in situ thermal XRD. They have been also characterized by ICP and 13C MAS NMR. Analyses of the ZnPO-FAU demonstrate that the tetramethylammonium (TMA+) cations are incorporated preferentially in the β-cages and that this material is stable up to 673 K. The crystallinity of the sample only decreases when the TMA+ cations located in the β-cages are eliminated (above ∼723 K). In the case on ZnPO-CZP the thermal removal of the water more strongly held by the structure produces a marked decrease of crystallinity at ∼523 K

AB - Samples of tridimensional microporous zinc phosphates with fully connected framework with faujasite (FAU) and chiral zincophosphate (CZP) structures have been prepared and characterized by thermal analyses comprising TGA, TGA-MS and in situ thermal XRD. They have been also characterized by ICP and 13C MAS NMR. Analyses of the ZnPO-FAU demonstrate that the tetramethylammonium (TMA+) cations are incorporated preferentially in the β-cages and that this material is stable up to 673 K. The crystallinity of the sample only decreases when the TMA+ cations located in the β-cages are eliminated (above ∼723 K). In the case on ZnPO-CZP the thermal removal of the water more strongly held by the structure produces a marked decrease of crystallinity at ∼523 K

KW - Crystalline microporous zincophosphates

KW - In situ thermal XRD

KW - Thermal stability

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U2 - 10.1016/S0040-6031(01)00564-0

DO - 10.1016/S0040-6031(01)00564-0

M3 - Artículo

SN - 0040-6031

VL - 376

SP - 155

EP - 162

JO - Thermochimica Acta

JF - Thermochimica Acta

IS - 2

ER -

Thermal analysis of large pore microporous zincophosphates

Abstract

Keywords

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