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

Synthesis and Application of the Ternary Zn0.5Cd0.5S/ZnO/carbon Xerogel Composite in the Photocatalytic Degradation of 4-chlorophenol

Full text
Author(s):
Gustavo Viégas Jucá Dantas [1] ; Nicolas Perciani de Moraes [2] ; Robson da Silva Rocha [3] ; Abner de Siervo [4] ; Marcos Roberto de Vasconcelos Lanza [5] ; Liana Alvares Rodrigues [6]
Total Authors: 6
Affiliation:
[1] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil
[2] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil
[3] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil
[4] Universidade Estadual de Campinas. Instituto de Física "Gleb Wataghin" - Brasil
[5] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil
[6] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil
Total Affiliations: 6
Document type: Journal article
Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 25, 2022-05-16.
Abstract

Abstract The Zn0.5Cd0.5S/ZnO/carbon xerogel photocatalyst was synthesized through the thermal treatment of ZnO, CdS, and a low-cost carbon xerogel matrix at high temperature (600 ºC). ZnO is one of the most widely used photocatalysts, but it has low visible-light absorption, while Zn0.5Cd0.5S is a visible-light active photocatalyst, which can be used as a co-catalyst to enhance photoactivity under natural radiation and promote charge separation through the creation of Z-scheme heterojunctions. The further addition of the carbon xerogel can be justified by its highly developed porous structure and ability to capture photogenerated electrons, which will also promote charge separation. The creation of the hexagonal Zn0.5Cd0.5S and ZnO phases was confirmed through the X-ray diffractometry technique. The addition of the carbon xerogel led to an increase in the specific surface area of the XC/ZnO (630%) and XC/ZnO-Zn0.5Cd0.5S (320%) and a decrease in particle size when compared to the pure ZnO. Regarding the photocatalytic performance of the materials, the Zn0.5Cd0.5S/ZnO/carbon xerogel displayed an enhanced photocatalytic activity for 4-chlorophenol degradation, with 84% degradation after 300 minutes of artificial solar irradiation. The enhanced photoactivity of the Zn0.5Cd0.5S/ZnO/carbon xerogel composite was further confirmed by chronoamperometry, as the composite presented higher photocurrent generation under light irradiation. (AU)

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
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