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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.)

TiO2/Nb2O5/carbon xerogel ternary photocatalyst for efficient degradation of 4-chlorophenol under solar light irradiation

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Author(s):
de Moraes, Nicolas Perciani [1] ; Torezin, Fernanda Azzoni [1] ; Juca Dantas, Gustavo Viegas [1] ; Martins de Sousa, Juliana Giancoli [1] ; Valim, Ricardo Bertholo [1] ; Rocha, Robson da Silva [1] ; Landers, Richard [2] ; Gaetano Pinto da Silva, Maria Lucia [1] ; Rodrigues, Liana Alvares [1]
Total Authors: 9
Affiliation:
[1] Escola Engn Lorena EEL USP, Estr Municipal Campinho S-N, BR-12602810 Lorena, SP - Brazil
[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, 500 Ave Albert Einstein, BR-13083852 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CERAMICS INTERNATIONAL; v. 46, n. 10, A, p. 14505-14515, JUL 2020.
Web of Science Citations: 0
Abstract

This study examines the development of ternary photocatalysts based on titanium dioxide, niobium oxide, and carbon xerogel, aimed at increasing photocatalytic efficiency under solar light irradiation. The modifications proposed are focused on diminishing charge recombination and enhancing visible light sensitivity. The new photocatalyst was prepared using discarded titanium and niobium scraps and chips, whilst black wattle tannin was used as the carbon source. The X-ray diffractometry results show that the anatase form of titanium dioxide is present in the samples, whereas the niobium oxide presents itself in the amorphous structure. The incorporation of both carbon xerogel and niobium oxide into the TiO2 is confirmed by the infrared and energy dispersive spectroscopies. The diffuse reflectance results show that the materials containing carbon xerogel present a significantly higher visible light absorption, whilst the combined effect of the modifications proposed caused the gap energy of the ternary material to drop noticeably. The photocatalytic efficiency of the ternary material was superior to the ones found for the pure oxides and binary material, probably due to its lower value of bandgap and enhanced charge separation efficiency, as confirmed by the electrochemical impedance tests. (AU)

FAPESP's process: 13/02762-5 - Development of technologies to prevent pollution: degradation and monitoring online of antibiotics in sewage
Grantee:Robson da Silva Rocha
Support type: Research Grants - Young Investigators Grants
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 type: Scholarships in Brazil - Doctorate
FAPESP's process: 18/12035-7 - Mechanical and antimicrobial properties of Ag/PMMA nanocomposite
Grantee:Gilmar Patrocínio Thim
Support type: Regular Research Grants
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 type: Regular Research Grants
FAPESP's process: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination
Grantee:Marcos Roberto de Vasconcelos Lanza
Support type: Research Projects - Thematic Grants