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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 Cu substitution on the structural ordering, photocatalytic activity and photoluminescence emission of Ag3-2xCuxPO4 powders

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Author(s):
Pereira, Wyllamanney da S. [1] ; Sczancoski, Julio C. [1] ; Calderon, Yormary N. C. [2] ; Mastelaro, Valmor R. [2] ; Botelho, Gleice [3] ; Machado, Thales R. [1] ; Leite, Edson R. [1] ; Longo, Elson [1]
Total Authors: 8
Affiliation:
[1] Univ Fed Sao Carlos UFSCar, Dept Quim, Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil
[3] UFT, Quim Ambiental, Gurupi, TO - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Applied Surface Science; v. 440, p. 61-72, MAY 15 2018.
Web of Science Citations: 2
Abstract

Materials presenting high photocatalytic performance and interesting photoluminescence emissions are promising candidates for photodegradation of organic pollutants discharged into natural waters as well as for development of new electro-optical devices, respectively. In this study, Ag3-2xCuxPO4 (x = 0.00, 0.01, 0.02, 0.04 and 0.08) powders were synthesized by the precipitation method. The long- and short-range structural ordering was affected when the copper (Cu) content was increased in the lattice, as identified by X-ray diffraction patterns, Fourier transform infrared spectroscopy and Raman spectroscopy, respectively. The field emission scanning electron microscope and transmission electron microscope revealed a particle system composed of irregular spherical-like microcrystals. The presence of Cu as well as its real amount in the samples were confirmed by means of X-ray photoelectron spectroscopy and inductively coupled plasma-atomic emission spectrometry, respectively. On increasing Cu level, a slight variation was noted on the photocatalytic activity of Ag3-2xCuxPO4 powders for degradation of rhodamine B under visible light irradiation. A photodegradation mechanism was proposed in details. The photoluminescence emissions were explained by electronic transitions involving intermediary energy levels in the band gap. The origin these energy levels was related to defects caused by the substitution of Ag by Cu in the crystalline structure. (C) 2018 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 15/11917-8 - Study of photoluminescent properties and photocatalytic of Ag4P2O7, Ag3-2xNixPO4 and Ag3-2xCuxPO4
Grantee:Wyllamanney da Silva Pereira
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 16/23663-3 - Amino acids-stabilized pyrophosphates nanoparticles controlled by self-assembly
Grantee:Wyllamanney da Silva Pereira
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 12/14004-5 - Investigation of the photoluminescence and photocatalytic properties of pure and Mn, Cu, and Zn-doped BaWO4 and BaMoO4 powders
Grantee:Júlio César Sczancoski
Support type: Scholarships in Brazil - Post-Doctorate