Supporting the Photocatalysts on ZrO2: An Effective Way to Enhance the Photocatalytic Activity of SrSnO3

Luzia Castro Honório; André Menezes; Edson Cavalcanti Da Silva Filho; Josy  Osajima; Amer Hakki; Donald Macphee; Ieda Maria Garcia dos Santos

doi:10.1016/j.apsusc.2020.146991

Supporting the Photocatalysts on ZrO2: An Effective Way to Enhance the Photocatalytic Activity of SrSnO3

Luzia Castro Honório, André Menezes, Edson Cavalcanti Da Silva Filho, Josy Osajima, Amer Hakki, Donald Macphee, Ieda Maria Garcia dos Santos^* (Corresponding Author)

^*Corresponding author for this work

Chemistry

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Abstract

Photocatalysts based on SrSnO3 and SrSnO3@ZrO2 were prepared by the modified-Pechini method and applied in the photocatalytic degradation of a textile azo-dye under UV radiation. The photohydroxylation of terephthalic acid and scavengers were employed in order to evaluate the participation of each active species, such as hydroxyl radical, and photogenerated electrons and holes on the photocatalytic process. The band gap structure was evaluated using the Mott Schottky method in combination with UV-visible spectrophotometry. Both samples had high photocatalytic activity, although SrSnO3@ZrO2 showed the best decolorization performance ranging from 32% to 98%. This behavior was assigned to the best dispersion of the active phase on the support and to the Sn(II) reduced states, observed by XPS. The participation of hydroxyl radicals in the reaction was confirmed when terephthalic acid was used as probe and by using isopropanol as hydroxyl radical scavenger, which resulted in the inhibition of the photocatalytic process.

Original language	English
Article number	146991
Number of pages	11
Journal	Applied Surface Science
Volume	528
Early online date	18 Jun 2020
DOIs	https://doi.org/10.1016/j.apsusc.2020.146991
Publication status	Published - 30 Oct 2020

Bibliographical note

This work was supported by Paraíba State Research Foundation /FAPESQ (grant number 0012/2019), PROINFRA/FINEP/MCTIC and in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001. The authors acknowledge Professor Graeme Paton from the School of Biological Sciences – University of Aberdeen, for the use of the spectrofluorimeter and Ana Rita Ferreira Alves Teixeira for kindly giving in the photocatalytic results with P25 for comparison.

CRediT authorship contribution statement
Luzia Maria Castro Honorio: Conceptualization, Investigation, Writing - original draft. André Luiz Menezes Oliveira: Formal analysis, Writing - original draft. Edson Cavalcanti Silva Filho: . Josy Anteveli Osajima: . Amer Hakki: . Donald E. Macphee: Writing - review & editing. Iêda Maria Garcia Santos: Investigation, Writing - review & editing, Supervision.

Keywords

Perovskite
SrSnO3
band gap structure
photocatalysis
active species
Active species
SrSnO
Photocatalysis
Band gap structure

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Cite this

@article{01a42cf44a394ce79f07a6035468f75f,

title = "Supporting the Photocatalysts on ZrO2: An Effective Way to Enhance the Photocatalytic Activity of SrSnO3",

abstract = "Photocatalysts based on SrSnO3 and SrSnO3@ZrO2 were prepared by the modified-Pechini method and applied in the photocatalytic degradation of a textile azo-dye under UV radiation. The photohydroxylation of terephthalic acid and scavengers were employed in order to evaluate the participation of each active species, such as hydroxyl radical, and photogenerated electrons and holes on the photocatalytic process. The band gap structure was evaluated using the Mott Schottky method in combination with UV-visible spectrophotometry. Both samples had high photocatalytic activity, although SrSnO3@ZrO2 showed the best decolorization performance ranging from 32% to 98%. This behavior was assigned to the best dispersion of the active phase on the support and to the Sn(II) reduced states, observed by XPS. The participation of hydroxyl radicals in the reaction was confirmed when terephthalic acid was used as probe and by using isopropanol as hydroxyl radical scavenger, which resulted in the inhibition of the photocatalytic process.",

keywords = "Perovskite, SrSnO3, band gap structure, photocatalysis, active species, Active species, SrSnO, Photocatalysis, Band gap structure",

author = "{Castro Hon{\'o}rio}, Luzia and Andr{\'e} Menezes and {Cavalcanti Da Silva Filho}, Edson and Josy Osajima and Amer Hakki and Donald Macphee and {Garcia dos Santos}, {Ieda Maria}",

note = "This work was supported by Para{\'i}ba State Research Foundation /FAPESQ (grant number 0012/2019), PROINFRA/FINEP/MCTIC and in part by the Coordena{\c c}{\~a}o de Aperfei{\c c}oamento de Pessoal de N{\'i}vel Superior – Brasil (CAPES) – Finance Code 001. The authors acknowledge Professor Graeme Paton from the School of Biological Sciences – University of Aberdeen, for the use of the spectrofluorimeter and Ana Rita Ferreira Alves Teixeira for kindly giving in the photocatalytic results with P25 for comparison. CRediT authorship contribution statement Luzia Maria Castro Honorio: Conceptualization, Investigation, Writing - original draft. Andr{\'e} Luiz Menezes Oliveira: Formal analysis, Writing - original draft. Edson Cavalcanti Silva Filho: . Josy Anteveli Osajima: . Amer Hakki: . Donald E. Macphee: Writing - review & editing. I{\^e}da Maria Garcia Santos: Investigation, Writing - review & editing, Supervision.",

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doi = "10.1016/j.apsusc.2020.146991",

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journal = "Applied Surface Science",

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T2 - An Effective Way to Enhance the Photocatalytic Activity of SrSnO3

AU - Castro Honório, Luzia

AU - Menezes, André

AU - Cavalcanti Da Silva Filho, Edson

AU - Osajima, Josy

AU - Hakki, Amer

AU - Macphee, Donald

AU - Garcia dos Santos, Ieda Maria

N1 - This work was supported by Paraíba State Research Foundation /FAPESQ (grant number 0012/2019), PROINFRA/FINEP/MCTIC and in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001. The authors acknowledge Professor Graeme Paton from the School of Biological Sciences – University of Aberdeen, for the use of the spectrofluorimeter and Ana Rita Ferreira Alves Teixeira for kindly giving in the photocatalytic results with P25 for comparison. CRediT authorship contribution statement Luzia Maria Castro Honorio: Conceptualization, Investigation, Writing - original draft. André Luiz Menezes Oliveira: Formal analysis, Writing - original draft. Edson Cavalcanti Silva Filho: . Josy Anteveli Osajima: . Amer Hakki: . Donald E. Macphee: Writing - review & editing. Iêda Maria Garcia Santos: Investigation, Writing - review & editing, Supervision.

PY - 2020/10/30

Y1 - 2020/10/30

N2 - Photocatalysts based on SrSnO3 and SrSnO3@ZrO2 were prepared by the modified-Pechini method and applied in the photocatalytic degradation of a textile azo-dye under UV radiation. The photohydroxylation of terephthalic acid and scavengers were employed in order to evaluate the participation of each active species, such as hydroxyl radical, and photogenerated electrons and holes on the photocatalytic process. The band gap structure was evaluated using the Mott Schottky method in combination with UV-visible spectrophotometry. Both samples had high photocatalytic activity, although SrSnO3@ZrO2 showed the best decolorization performance ranging from 32% to 98%. This behavior was assigned to the best dispersion of the active phase on the support and to the Sn(II) reduced states, observed by XPS. The participation of hydroxyl radicals in the reaction was confirmed when terephthalic acid was used as probe and by using isopropanol as hydroxyl radical scavenger, which resulted in the inhibition of the photocatalytic process.

AB - Photocatalysts based on SrSnO3 and SrSnO3@ZrO2 were prepared by the modified-Pechini method and applied in the photocatalytic degradation of a textile azo-dye under UV radiation. The photohydroxylation of terephthalic acid and scavengers were employed in order to evaluate the participation of each active species, such as hydroxyl radical, and photogenerated electrons and holes on the photocatalytic process. The band gap structure was evaluated using the Mott Schottky method in combination with UV-visible spectrophotometry. Both samples had high photocatalytic activity, although SrSnO3@ZrO2 showed the best decolorization performance ranging from 32% to 98%. This behavior was assigned to the best dispersion of the active phase on the support and to the Sn(II) reduced states, observed by XPS. The participation of hydroxyl radicals in the reaction was confirmed when terephthalic acid was used as probe and by using isopropanol as hydroxyl radical scavenger, which resulted in the inhibition of the photocatalytic process.

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KW - SrSnO3

KW - band gap structure

KW - photocatalysis

KW - active species

KW - Active species

KW - SrSnO

KW - Photocatalysis

KW - Band gap structure

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DO - 10.1016/j.apsusc.2020.146991

M3 - Article

SN - 0169-4332

VL - 528

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 146991

ER -

Supporting the Photocatalysts on ZrO2: An Effective Way to Enhance the Photocatalytic Activity of SrSnO3

Abstract

Bibliographical note

Keywords

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