Top–Down Approach for the Deposition of Photoactive (Na0.5Bi0.5)TiO3-Based Heterojunctions by Flame Spray: Analysis of Deposition Parameters

Research output: Contribution to journal › Article › Research › peer review

Authors

  • A. I. Gutiérrez-Pérez
  • M. T. Ayala-Ayala
  • A. G. Mora-García
  • C. Hernández-Navarro
  • S. Pérez
  • J. A. Diaz-Real
  • J. González Hernández
  • J. Muñoz-Saldaña

Research Organisations

External Research Organisations

  • Center for Research and Advanced Studies of the National Polytechnic Institute
  • National Technological Institute of Mexico (TecNM)
  • Centro de Investigacion y Desarrollo Tecnologico en Electroquimica
View graph of relations

Details

Original languageEnglish
Pages (from-to)1909-1925
Number of pages17
JournalJournal of Thermal Spray Technology
Volume32
Issue number7
Early online date6 Jul 2023
Publication statusPublished - Oct 2023

Abstract

Visible-light photoactive (Na0.5Bi0.5)TiO3 (NBT)-based heterojunctions have demonstrated their applicability in environmental remediation. The photocatalytic properties of NBT-based coatings are here reported. NBT-based materials were deposited by oxyacetylene flame spray (FS). The physicochemical properties were analyzed as a function of the spraying parameters: fuel/oxygen ratio (F/O), stand-off distance (SOD), and total gas flow (TF). A flame with reducing characteristics promotes the formation of TiO2 (anatase and rutile) and Bi4Ti3O12, while an oxidizing flame results in coatings rich in NBT and Bi4Ti3O12. The SOD mainly influences the degree of crystallinity, which is higher at shorter distances. Optical properties estimated by UV–VIS diffuse reflectance confirmed an increase in light absorption after the FS process, with an E g red shift from 3.32 eV of the NBT powder to 2.63-2.96 eV of the coatings. These values are dependent on the F/O, with a significant E g narrowing under reducing conditions. Photoelectrochemical measurements revealed that faster electron collection is obtained due to the transformations occurring throughout the FS process while still retaining nearly 70 and 88% of the photocurrent density (j ph) at UV and visible light, respectively. These results suggest the great potential of the FS methodology to produce multiphase photocatalytic coatings by tuning the processing parameters.

Keywords

    bismuth-based heterojunctions, ceramics, flame spray, sodium bismuth titanate, thick coatings, visible-light photoactive

ASJC Scopus subject areas

Cite this

Top–Down Approach for the Deposition of Photoactive (Na0.5Bi0.5)TiO3-Based Heterojunctions by Flame Spray: Analysis of Deposition Parameters. / Gutiérrez-Pérez, A. I.; Ayala-Ayala, M. T.; Mora-García, A. G. et al.
In: Journal of Thermal Spray Technology, Vol. 32, No. 7, 10.2023, p. 1909-1925.

Research output: Contribution to journal › Article › Research › peer review

Gutiérrez-Pérez, AI, Ayala-Ayala, MT, Mora-García, AG, Hernández-Navarro, C, Pérez, S, Diaz-Real, JA, González Hernández, J & Muñoz-Saldaña, J 2023, 'Top–Down Approach for the Deposition of Photoactive (Na0.5Bi0.5)TiO3-Based Heterojunctions by Flame Spray: Analysis of Deposition Parameters', Journal of Thermal Spray Technology, vol. 32, no. 7, pp. 1909-1925. https://doi.org/10.1007/s11666-023-01626-x
Gutiérrez-Pérez, A. I., Ayala-Ayala, M. T., Mora-García, A. G., Hernández-Navarro, C., Pérez, S., Diaz-Real, J. A., González Hernández, J., & Muñoz-Saldaña, J. (2023). Top–Down Approach for the Deposition of Photoactive (Na0.5Bi0.5)TiO3-Based Heterojunctions by Flame Spray: Analysis of Deposition Parameters. Journal of Thermal Spray Technology, 32(7), 1909-1925. https://doi.org/10.1007/s11666-023-01626-x
Gutiérrez-Pérez AI, Ayala-Ayala MT, Mora-García AG, Hernández-Navarro C, Pérez S, Diaz-Real JA et al. Top–Down Approach for the Deposition of Photoactive (Na0.5Bi0.5)TiO3-Based Heterojunctions by Flame Spray: Analysis of Deposition Parameters. Journal of Thermal Spray Technology. 2023 Oct;32(7):1909-1925. Epub 2023 Jul 6. doi: 10.1007/s11666-023-01626-x
Gutiérrez-Pérez, A. I. ; Ayala-Ayala, M. T. ; Mora-García, A. G. et al. / Top–Down Approach for the Deposition of Photoactive (Na0.5Bi0.5)TiO3-Based Heterojunctions by Flame Spray : Analysis of Deposition Parameters. In: Journal of Thermal Spray Technology. 2023 ; Vol. 32, No. 7. pp. 1909-1925.
Download
@article{8df21b36388544cab622f7844a1f25d9,
title = "Top–Down Approach for the Deposition of Photoactive (Na0.5Bi0.5)TiO3-Based Heterojunctions by Flame Spray: Analysis of Deposition Parameters",
abstract = "Visible-light photoactive (Na0.5Bi0.5)TiO3 (NBT)-based heterojunctions have demonstrated their applicability in environmental remediation. The photocatalytic properties of NBT-based coatings are here reported. NBT-based materials were deposited by oxyacetylene flame spray (FS). The physicochemical properties were analyzed as a function of the spraying parameters: fuel/oxygen ratio (F/O), stand-off distance (SOD), and total gas flow (TF). A flame with reducing characteristics promotes the formation of TiO2 (anatase and rutile) and Bi4Ti3O12, while an oxidizing flame results in coatings rich in NBT and Bi4Ti3O12. The SOD mainly influences the degree of crystallinity, which is higher at shorter distances. Optical properties estimated by UV–VIS diffuse reflectance confirmed an increase in light absorption after the FS process, with an E g red shift from 3.32 eV of the NBT powder to 2.63-2.96 eV of the coatings. These values are dependent on the F/O, with a significant E g narrowing under reducing conditions. Photoelectrochemical measurements revealed that faster electron collection is obtained due to the transformations occurring throughout the FS process while still retaining nearly 70 and 88% of the photocurrent density (j ph) at UV and visible light, respectively. These results suggest the great potential of the FS methodology to produce multiphase photocatalytic coatings by tuning the processing parameters.",
keywords = "bismuth-based heterojunctions, ceramics, flame spray, sodium bismuth titanate, thick coatings, visible-light photoactive",
author = "Guti{\'e}rrez-P{\'e}rez, {A. I.} and Ayala-Ayala, {M. T.} and Mora-Garc{\'i}a, {A. G.} and C. Hern{\'a}ndez-Navarro and S. P{\'e}rez and Diaz-Real, {J. A.} and {Gonz{\'a}lez Hern{\'a}ndez}, J. and J. Mu{\~n}oz-Salda{\~n}a",
note = "Funding Information: The authors are grateful to CONACYT for the financial support through project 319478. This work has been carried out at CENAPROT and LIDTRA national laboratories. Special thanks to Dr. G. Torres Delgado from CINVESTAV Quer{\'e}taro for the support on the measurements in the UV–vis spectrophotometer, Dr. E. F. Reguera Ruiz of the National Laboratory of Conversion and Energy Storage (LNCAE) IPN-CICATA-Legaria for the support on the XPS measurements and CIDESI for the X-ray diffraction measurements. J.A.D.-R. thanks CONACyT (“Ciencia de Frontera 2019−1” Grant Number CF-2095605) for financial support for PEC measurements equipment. C. H.-N. thanks CONACYT for the Postdoctoral Research Fellowship for the completion of this work. ",
year = "2023",
month = oct,
doi = "10.1007/s11666-023-01626-x",
language = "English",
volume = "32",
pages = "1909--1925",
journal = "Journal of Thermal Spray Technology",
issn = "1059-9630",
publisher = "Springer New York",
number = "7",

}

Download

TY - JOUR

T1 - Top–Down Approach for the Deposition of Photoactive (Na0.5Bi0.5)TiO3-Based Heterojunctions by Flame Spray

T2 - Analysis of Deposition Parameters

AU - Gutiérrez-Pérez, A. I.

AU - Ayala-Ayala, M. T.

AU - Mora-García, A. G.

AU - Hernández-Navarro, C.

AU - Pérez, S.

AU - Diaz-Real, J. A.

AU - González Hernández, J.

AU - Muñoz-Saldaña, J.

N1 - Funding Information: The authors are grateful to CONACYT for the financial support through project 319478. This work has been carried out at CENAPROT and LIDTRA national laboratories. Special thanks to Dr. G. Torres Delgado from CINVESTAV Querétaro for the support on the measurements in the UV–vis spectrophotometer, Dr. E. F. Reguera Ruiz of the National Laboratory of Conversion and Energy Storage (LNCAE) IPN-CICATA-Legaria for the support on the XPS measurements and CIDESI for the X-ray diffraction measurements. J.A.D.-R. thanks CONACyT (“Ciencia de Frontera 2019−1” Grant Number CF-2095605) for financial support for PEC measurements equipment. C. H.-N. thanks CONACYT for the Postdoctoral Research Fellowship for the completion of this work.

PY - 2023/10

Y1 - 2023/10

N2 - Visible-light photoactive (Na0.5Bi0.5)TiO3 (NBT)-based heterojunctions have demonstrated their applicability in environmental remediation. The photocatalytic properties of NBT-based coatings are here reported. NBT-based materials were deposited by oxyacetylene flame spray (FS). The physicochemical properties were analyzed as a function of the spraying parameters: fuel/oxygen ratio (F/O), stand-off distance (SOD), and total gas flow (TF). A flame with reducing characteristics promotes the formation of TiO2 (anatase and rutile) and Bi4Ti3O12, while an oxidizing flame results in coatings rich in NBT and Bi4Ti3O12. The SOD mainly influences the degree of crystallinity, which is higher at shorter distances. Optical properties estimated by UV–VIS diffuse reflectance confirmed an increase in light absorption after the FS process, with an E g red shift from 3.32 eV of the NBT powder to 2.63-2.96 eV of the coatings. These values are dependent on the F/O, with a significant E g narrowing under reducing conditions. Photoelectrochemical measurements revealed that faster electron collection is obtained due to the transformations occurring throughout the FS process while still retaining nearly 70 and 88% of the photocurrent density (j ph) at UV and visible light, respectively. These results suggest the great potential of the FS methodology to produce multiphase photocatalytic coatings by tuning the processing parameters.

AB - Visible-light photoactive (Na0.5Bi0.5)TiO3 (NBT)-based heterojunctions have demonstrated their applicability in environmental remediation. The photocatalytic properties of NBT-based coatings are here reported. NBT-based materials were deposited by oxyacetylene flame spray (FS). The physicochemical properties were analyzed as a function of the spraying parameters: fuel/oxygen ratio (F/O), stand-off distance (SOD), and total gas flow (TF). A flame with reducing characteristics promotes the formation of TiO2 (anatase and rutile) and Bi4Ti3O12, while an oxidizing flame results in coatings rich in NBT and Bi4Ti3O12. The SOD mainly influences the degree of crystallinity, which is higher at shorter distances. Optical properties estimated by UV–VIS diffuse reflectance confirmed an increase in light absorption after the FS process, with an E g red shift from 3.32 eV of the NBT powder to 2.63-2.96 eV of the coatings. These values are dependent on the F/O, with a significant E g narrowing under reducing conditions. Photoelectrochemical measurements revealed that faster electron collection is obtained due to the transformations occurring throughout the FS process while still retaining nearly 70 and 88% of the photocurrent density (j ph) at UV and visible light, respectively. These results suggest the great potential of the FS methodology to produce multiphase photocatalytic coatings by tuning the processing parameters.

KW - bismuth-based heterojunctions

KW - ceramics

KW - flame spray

KW - sodium bismuth titanate

KW - thick coatings

KW - visible-light photoactive

UR - http://www.scopus.com/inward/record.url?scp=85164112909&partnerID=8YFLogxK

U2 - 10.1007/s11666-023-01626-x

DO - 10.1007/s11666-023-01626-x

M3 - Article

AN - SCOPUS:85164112909

VL - 32

SP - 1909

EP - 1925

JO - Journal of Thermal Spray Technology

JF - Journal of Thermal Spray Technology

SN - 1059-9630

IS - 7

ER -