Caracterizacio´n por SEM, EDS y micro-Raman de la influencia de la relacio´n molar SiO2/Al2O3 y temperatura de reduccio´n sobre el sistema CuZSM5

F. Cha´vez Rivas; I. Rodri´guez Iznaga; V. Petranovskii

Caracterizacio´n por SEM, EDS y micro-Raman de la influencia de la relacio´n molar SiO₂/Al₂O₃ y temperatura de reduccio´n sobre el sistema CuZSM5

F. Cha´vez Rivas, I. Rodri´guez Iznaga, V. Petranovskii

Escuela Superior de Física y Matemáticas (ESFM)

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

1 Scopus citations

Abstract

The morphological and spectroscopic changes caused by reduction of ion-exchanged CuZSM5 samples with SiO₂/Al₂O₃ molar ratios (MR) of 30 and 70 in H₂ flow at 150 and 350°C are discussed. The nominal copper loading was of 1% by weight. SEM microscopy of CuZSM5 sample set showed that the treatment in reducing atmosphere at 350°C produces particle agglomeration and smoother surface texture that treatment at 150°C; this effect was more pronounced for the sample with RM 30. Furthermore, the particles corresponding to the sample with RM 30 are of irregular shape and have rough texture (cubic or rectangular crystals, protrusions) while the particles of the sample with RM 70 are in the majority of spherical smooth texture (leaf-shaped crystals/platelet, reclining). EDS elemental analysis reveals a heterogeneous distribution of copper as well other elements in each sample. The micro-Raman spectroscopy shows some changes in the vibrational modes for the studied samples.

Original language	Spanish
Pages (from-to)	340-349
Number of pages	10
Journal	Revista Mexicana de Fisica
Volume	60
Issue number	5
State	Published - 2014

Cite this

@article{828e8025b78942829f6c79ea9316485f,

title = "Caracterizacio´n por SEM, EDS y micro-Raman de la influencia de la relacio´n molar SiO2/Al2O3 y temperatura de reduccio´n sobre el sistema CuZSM5",

abstract = "The morphological and spectroscopic changes caused by reduction of ion-exchanged CuZSM5 samples with SiO2/Al2O3 molar ratios (MR) of 30 and 70 in H2 flow at 150 and 350°C are discussed. The nominal copper loading was of 1% by weight. SEM microscopy of CuZSM5 sample set showed that the treatment in reducing atmosphere at 350°C produces particle agglomeration and smoother surface texture that treatment at 150°C; this effect was more pronounced for the sample with RM 30. Furthermore, the particles corresponding to the sample with RM 30 are of irregular shape and have rough texture (cubic or rectangular crystals, protrusions) while the particles of the sample with RM 70 are in the majority of spherical smooth texture (leaf-shaped crystals/platelet, reclining). EDS elemental analysis reveals a heterogeneous distribution of copper as well other elements in each sample. The micro-Raman spectroscopy shows some changes in the vibrational modes for the studied samples.",

keywords = "Cuzsm5 zeolite, EDS, Micro-Raman, SEM, Sio/AlO molar ratio",

author = "{Cha´vez Rivas}, F. and Iznaga, {I. Rodri´guez} and V. Petranovskii",

year = "2014",

language = "Espa{\~n}ol",

volume = "60",

pages = "340--349",

journal = "Revista Mexicana de Fisica",

issn = "0035-001X",

number = "5",

}

TY - JOUR

T1 - Caracterizacio´n por SEM, EDS y micro-Raman de la influencia de la relacio´n molar SiO2/Al2O3 y temperatura de reduccio´n sobre el sistema CuZSM5

AU - Cha´vez Rivas, F.

AU - Iznaga, I. Rodri´guez

AU - Petranovskii, V.

PY - 2014

Y1 - 2014

N2 - The morphological and spectroscopic changes caused by reduction of ion-exchanged CuZSM5 samples with SiO2/Al2O3 molar ratios (MR) of 30 and 70 in H2 flow at 150 and 350°C are discussed. The nominal copper loading was of 1% by weight. SEM microscopy of CuZSM5 sample set showed that the treatment in reducing atmosphere at 350°C produces particle agglomeration and smoother surface texture that treatment at 150°C; this effect was more pronounced for the sample with RM 30. Furthermore, the particles corresponding to the sample with RM 30 are of irregular shape and have rough texture (cubic or rectangular crystals, protrusions) while the particles of the sample with RM 70 are in the majority of spherical smooth texture (leaf-shaped crystals/platelet, reclining). EDS elemental analysis reveals a heterogeneous distribution of copper as well other elements in each sample. The micro-Raman spectroscopy shows some changes in the vibrational modes for the studied samples.

AB - The morphological and spectroscopic changes caused by reduction of ion-exchanged CuZSM5 samples with SiO2/Al2O3 molar ratios (MR) of 30 and 70 in H2 flow at 150 and 350°C are discussed. The nominal copper loading was of 1% by weight. SEM microscopy of CuZSM5 sample set showed that the treatment in reducing atmosphere at 350°C produces particle agglomeration and smoother surface texture that treatment at 150°C; this effect was more pronounced for the sample with RM 30. Furthermore, the particles corresponding to the sample with RM 30 are of irregular shape and have rough texture (cubic or rectangular crystals, protrusions) while the particles of the sample with RM 70 are in the majority of spherical smooth texture (leaf-shaped crystals/platelet, reclining). EDS elemental analysis reveals a heterogeneous distribution of copper as well other elements in each sample. The micro-Raman spectroscopy shows some changes in the vibrational modes for the studied samples.

KW - Cuzsm5 zeolite

KW - EDS

KW - Micro-Raman

KW - SEM

KW - Sio/AlO molar ratio

UR - http://www.scopus.com/inward/record.url?scp=84906979356&partnerID=8YFLogxK

M3 - Artículo

SN - 0035-001X

VL - 60

SP - 340

EP - 349

JO - Revista Mexicana de Fisica

JF - Revista Mexicana de Fisica

IS - 5

ER -

Caracterizacio´n por SEM, EDS y micro-Raman de la influencia de la relacio´n molar SiO₂/Al₂O₃ y temperatura de reduccio´n sobre el sistema CuZSM5

Abstract

Other files and links

Fingerprint

Cite this