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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of defects on photoluminescent and photocatalytic behavior of CaO/SrTiO3 heterojunctions

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Author(s):
Coleto Junior, Ubirajara [1, 2] ; Amoresi, Rafael A. C. [3] ; Pereira, Chrystopher A. M. [1] ; Simoes, Alexandre Z. [3] ; Zaghete, Maria A. [1] ; Monteiro Filho, Elias S. [1] ; Longo, Elson [4] ; Perazolli, Leinig A. [1]
Total Authors: 8
Affiliation:
[1] Sao Paulo State Univ UNESP, LIEC Chem Inst, BR-14800060 Araraquara, SP - Brazil
[2] Fed Inst Sao Paulo IFSP, Dept Chem, BR-15808305 Catanduva, SP - Brazil
[3] UNESP, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP - Brazil
[4] Sao Carlos Fed Univ UFSCar, LIEC Dept Chem, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: CERAMICS INTERNATIONAL; v. 45, n. 12, p. 15244-15251, AUG 15 2019.
Web of Science Citations: 2
Abstract

CaO/SrTiO3 heterostructures were fabricated, and their photocatalytic activity for the discoloration of Rhodamine B (RhB) dye was evaluated. SrTiO3 particles were obtained via a polymer precursor method, and heterojunctions in which CaO grew on SrTiO3 crystalline particles were prepared via a sol-gel route. Characterization was performed using X-ray diffraction, transmission electron microscopy, and ultraviolet/visible/near-infrared, Raman, and photoluminescence spectroscopy. The photocatalytic activity of the heterostructures was verified by the discoloration of RhB using UV light. Defects caused by tensile strain in the interface region were verified when the calcium oxide grew on the strontium titanate, altering the defects of the material. In the heterojunctions, the defects of the monoionized and doubly ionized O (oxygen) vacancies had a greater contribution to the photocatalytic process than the defects at deep levels generated in the stress region and the direct transfer of charge between the conduction and valence bands. (AU)

FAPESP's process: 17/19143-7 - An experimental theoretical approach of conduction mechanisms and interface defects of heterostructure sensors based on P-N and N-N semiconductors from CeO2 matrices
Grantee:Rafael Aparecido Ciola Amoresi
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC