Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Facile synthesis of cadmium sulfide and the effect of thermal annealing in N-2-rich atmosphere on its structural, morphological, chemical, and optical properties

Full text
Author(s):
Juca Dantas, Gustavo Viegas [1] ; de Moraes, Nicolas Perciani [1] ; Bacani, Rebeca [1] ; Rodrigues, Liana Alvares [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Lorena Sch Engn EEL, Estr Municipal Campinho S-N, BR-12602810 Lorena, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Materials Chemistry and Physics; v. 277, FEB 1 2022.
Web of Science Citations: 0
Abstract

This works aims to evaluate the effect of the annealing process under a nitrogen-rich atmosphere on the properties of cadmium sulfide (CdS). The CdS studied in this work was produced by a simple one-pot reaction between cadmium chloride and sodium sulfide in an aqueous solution. After the synthesis pathway, the powdered material was annealed in a furnace at different temperatures under an N2-rich atmosphere and the resulting samples were characterized to evaluate the transformations obtained. The X-ray diffraction results show that the annealing temperature has a major impact on the structural composition of the CdS, as new phases (CdO and CdSO4) are obtained at higher temperatures due to the oxidation of the samples. The scanning electron micrographs show that a higher annealing temperature leads to the coalescence of the CdS particles, as the spherical particles obtained without thermal treatment are transformed into a smooth surface at temperatures higher than 600 degrees C. The optical properties of the composite, such as bandgap energy and visible light absorption, can be modified using different annealing temperatures. The differential scanning calorimetry and thermogravimetry confirm the phase transformations observed, showing that the CdS is oxidized to CdO at temperatures above 700 degrees C. (AU)

FAPESP's process: 18/16360-0 - Development of ZnO/Bi2O3/Carbon xerogel ternary composites as photocatalysts for the degradation of persistent organic pollutants
Grantee:Nicolas Perciani de Moraes
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 18/10492-1 - Photocatalytic evaluation of heterojunctions semiconductor/ZnO/carbon xerogel in the photodegradation of 4-chlorophenol in both fluidized bed and batch reactors
Grantee:Liana Alvares Rodrigues
Support Opportunities: Regular Research Grants