TY - JOUR
T1 - Synthesis and Evaluation of FeSX/TiO2 for the Photocatalytic Degradation of Phenol under Visible-Light Region
AU - Alvarez-Bustos, Diego
AU - Sanchez-Minero, Felipe
AU - Santes, Victor
AU - Romero-Ibarra, Issis Claudette
AU - de los Reyes Heredia, José Antonio
AU - Rios-Escobedo, Reyna
AU - Tzompantzi-Morales, Francisco
AU - Santolalla-Vargas, Carlos Eduardo
N1 - Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
PY - 2022/5
Y1 - 2022/5
N2 - In the present work, phenol was used as a model molecule to the photocatalytic evaluation of TiO2 impregnated with iron sulphide and chlorine on a visible-light reactor. The iron–chlorine catalyst was prepared by incipient impregnation with the metal precursors, Fe (NO3 )3 and NaCl on previously calcined TiO2 . The catalyst was sulphurized with H2S at 300◦C for 1 h. The catalysts were prepared at different chlorine concentrations using HYDRA chemical equilibrium diagrams to obtain different fractions of FeCl+ . The oxide catalysts were characterized with diffuse reflectance (DRS UV–Vis) and temperature programmed reduction analysis (TPR). Sulphurized catalysts were characterized with Raman spectrometry and X-ray photoelectron spectrometry (XPS). The FeS–2Cl/TiO2 catalyst presented 8.35 times higher photodegradation than TiO2 and 6.4 times higher compared to the FeS–0.25Cl/TiO2 catalyst. DRS and XPS showed similar results of band gap, proving that the catalyst remain stable after sulphurisation. The TPR results of FeS–2Cl/TiO2 showed an increment of 86.29% in Fe2+/Fe3+ compared to FeS–0.25Cl/TiO2 . XPS and Raman results for oxide and sulphated iron species relation suggested that FeS–2Cl/TiO2 decreased 4.45% compared to FeS–0.25Cl/TiO2 catalyst. XPS semiquantitative for S/Fe results showed that the FeS–2Cl/TiO2 catalyst increased 73.17% in comparison to FeS–0.25Cl/TiO2 . These results suggested the increment of sulphurisation degree for FeS–2Cl/TiO2 . In this regard, the catalyst characterization results showed that the presence of FeCl+ (0.85 fractions) in solution before impregnation promoted the active sulphide species maintaining the band gap and improved the degradation of phenol on visible light.
AB - In the present work, phenol was used as a model molecule to the photocatalytic evaluation of TiO2 impregnated with iron sulphide and chlorine on a visible-light reactor. The iron–chlorine catalyst was prepared by incipient impregnation with the metal precursors, Fe (NO3 )3 and NaCl on previously calcined TiO2 . The catalyst was sulphurized with H2S at 300◦C for 1 h. The catalysts were prepared at different chlorine concentrations using HYDRA chemical equilibrium diagrams to obtain different fractions of FeCl+ . The oxide catalysts were characterized with diffuse reflectance (DRS UV–Vis) and temperature programmed reduction analysis (TPR). Sulphurized catalysts were characterized with Raman spectrometry and X-ray photoelectron spectrometry (XPS). The FeS–2Cl/TiO2 catalyst presented 8.35 times higher photodegradation than TiO2 and 6.4 times higher compared to the FeS–0.25Cl/TiO2 catalyst. DRS and XPS showed similar results of band gap, proving that the catalyst remain stable after sulphurisation. The TPR results of FeS–2Cl/TiO2 showed an increment of 86.29% in Fe2+/Fe3+ compared to FeS–0.25Cl/TiO2 . XPS and Raman results for oxide and sulphated iron species relation suggested that FeS–2Cl/TiO2 decreased 4.45% compared to FeS–0.25Cl/TiO2 catalyst. XPS semiquantitative for S/Fe results showed that the FeS–2Cl/TiO2 catalyst increased 73.17% in comparison to FeS–0.25Cl/TiO2 . These results suggested the increment of sulphurisation degree for FeS–2Cl/TiO2 . In this regard, the catalyst characterization results showed that the presence of FeCl+ (0.85 fractions) in solution before impregnation promoted the active sulphide species maintaining the band gap and improved the degradation of phenol on visible light.
KW - degradation
KW - impregnation
KW - phenol
KW - photocatalysis
UR - http://www.scopus.com/inward/record.url?scp=85128776659&partnerID=8YFLogxK
U2 - 10.3390/catal12050457
DO - 10.3390/catal12050457
M3 - Artículo
AN - SCOPUS:85128776659
SN - 2073-4344
VL - 12
JO - Catalysts
JF - Catalysts
IS - 5
M1 - 457
ER -