Excitonic absorption of spherical PbS nanoparticles in zeolite A

M. Flores-Acosta; M. Sotelo-Lerma; H. Arizpe-Chávez; F. F. Castillón-Barraza; R. Ramírez-Bon

doi:10.1016/j.ssc.2003.09.008

Excitonic absorption of spherical PbS nanoparticles in zeolite A

M. Flores-Acosta, M. Sotelo-Lerma, H. Arizpe-Chávez, F. F. Castillón-Barraza, R. Ramírez-Bon^*

^*Corresponding author for this work

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

41 Scopus citations

Abstract

We report the optical and structural properties of PbS nanoparticles in zeolite A. The samples were obtained by sulfidation of the Pb²⁺ ion-exchanged zeolite in a thiourea solution at 50 °C. The optical properties of the samples were studied by diffuse reflectance spectroscopy. Their crystalline structure and morphology were studied by electron diffraction and by transmission and scanning electron microscopy. The results show that the nanoparticles are not inside the zeolite cages but outside, embedded in the zeolite matrix. Exciton absorption peaks at much higher energy than the fundamental absorption edge of bulk PbS indicate quantum confinement effects in the spherical shape nanoparticles as a consequence of their small size.

Original language	English
Pages (from-to)	407-411
Number of pages	5
Journal	Solid State Communications
Volume	128
Issue number	11
DOIs	https://doi.org/10.1016/j.ssc.2003.09.008
State	Published - Dec 2003

Bibliographical note

Funding Information:
We acknowledge to Dr R. Machorro from CCMC-UNAM for the diffuse reflectance measurements and the technical assistance of I. Gradilla-Martı́nez, F. Ruiz-Medina, M.A. Hernández-Landaverde and J.E. Urbina-Alvárez. This work was financial supported by CONACyT from México (Project number 34514-U).

Keywords

A. Semiconductors
A. Zeolites
B. Chemical synthesis
B. Nanostructures

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10.1016/j.ssc.2003.09.008

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title = "Excitonic absorption of spherical PbS nanoparticles in zeolite A",

abstract = "We report the optical and structural properties of PbS nanoparticles in zeolite A. The samples were obtained by sulfidation of the Pb2+ ion-exchanged zeolite in a thiourea solution at 50 °C. The optical properties of the samples were studied by diffuse reflectance spectroscopy. Their crystalline structure and morphology were studied by electron diffraction and by transmission and scanning electron microscopy. The results show that the nanoparticles are not inside the zeolite cages but outside, embedded in the zeolite matrix. Exciton absorption peaks at much higher energy than the fundamental absorption edge of bulk PbS indicate quantum confinement effects in the spherical shape nanoparticles as a consequence of their small size.",

keywords = "A. Semiconductors, A. Zeolites, B. Chemical synthesis, B. Nanostructures",

author = "M. Flores-Acosta and M. Sotelo-Lerma and H. Arizpe-Ch{\'a}vez and Castill{\'o}n-Barraza, {F. F.} and R. Ram{\'i}rez-Bon",

note = "Funding Information: We acknowledge to Dr R. Machorro from CCMC-UNAM for the diffuse reflectance measurements and the technical assistance of I. Gradilla-Mart{\'ı}nez, F. Ruiz-Medina, M.A. Hern{\'a}ndez-Landaverde and J.E. Urbina-Alv{\'a}rez. This work was financial supported by CONACyT from M{\'e}xico (Project number 34514-U).",

year = "2003",

month = dec,

doi = "10.1016/j.ssc.2003.09.008",

language = "Ingl{\'e}s",

volume = "128",

pages = "407--411",

journal = "Solid State Communications",

issn = "0038-1098",

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TY - JOUR

T1 - Excitonic absorption of spherical PbS nanoparticles in zeolite A

AU - Flores-Acosta, M.

AU - Sotelo-Lerma, M.

AU - Arizpe-Chávez, H.

AU - Castillón-Barraza, F. F.

AU - Ramírez-Bon, R.

N1 - Funding Information: We acknowledge to Dr R. Machorro from CCMC-UNAM for the diffuse reflectance measurements and the technical assistance of I. Gradilla-Martı́nez, F. Ruiz-Medina, M.A. Hernández-Landaverde and J.E. Urbina-Alvárez. This work was financial supported by CONACyT from México (Project number 34514-U).

PY - 2003/12

Y1 - 2003/12

N2 - We report the optical and structural properties of PbS nanoparticles in zeolite A. The samples were obtained by sulfidation of the Pb2+ ion-exchanged zeolite in a thiourea solution at 50 °C. The optical properties of the samples were studied by diffuse reflectance spectroscopy. Their crystalline structure and morphology were studied by electron diffraction and by transmission and scanning electron microscopy. The results show that the nanoparticles are not inside the zeolite cages but outside, embedded in the zeolite matrix. Exciton absorption peaks at much higher energy than the fundamental absorption edge of bulk PbS indicate quantum confinement effects in the spherical shape nanoparticles as a consequence of their small size.

AB - We report the optical and structural properties of PbS nanoparticles in zeolite A. The samples were obtained by sulfidation of the Pb2+ ion-exchanged zeolite in a thiourea solution at 50 °C. The optical properties of the samples were studied by diffuse reflectance spectroscopy. Their crystalline structure and morphology were studied by electron diffraction and by transmission and scanning electron microscopy. The results show that the nanoparticles are not inside the zeolite cages but outside, embedded in the zeolite matrix. Exciton absorption peaks at much higher energy than the fundamental absorption edge of bulk PbS indicate quantum confinement effects in the spherical shape nanoparticles as a consequence of their small size.

KW - A. Semiconductors

KW - A. Zeolites

KW - B. Chemical synthesis

KW - B. Nanostructures

UR - http://www.scopus.com/inward/record.url?scp=0142094639&partnerID=8YFLogxK

U2 - 10.1016/j.ssc.2003.09.008

DO - 10.1016/j.ssc.2003.09.008

M3 - Artículo

SN - 0038-1098

VL - 128

SP - 407

EP - 411

JO - Solid State Communications

JF - Solid State Communications

IS - 11

ER -

Excitonic absorption of spherical PbS nanoparticles in zeolite A

Abstract

Bibliographical note

Keywords

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