Bandgap optimization of sol–gel-derived Tio2 and its effect on the photodegradation of formic acid

Morad Zouheir; Ouissal Assila; Karim Tanji; Abdelali El Gaidoumi; Javier Araña; José Miguel Doña Rodríguez; Jan-Henrik Smått; Tan-Phat Huynh; Abdelhak Kherbeche

doi:10.1088/2399-1984/abfb7d

Bandgap optimization of sol–gel-derived Tio₂ and its effect on the photodegradation of formic acid

Morad Zouheir^*, Ouissal Assila, Karim Tanji, Abdelali El Gaidoumi, Javier Araña, José Miguel Doña Rodríguez, Jan-Henrik Smått, Tan-Phat Huynh^*, Abdelhak Kherbeche^*

^*Corresponding author for this work

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

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Abstract

This work reports a key factor, the H₂SO₄ concentration, in controlling the physicochemical properties of titanium dioxide (TiO₂) photocatalysts during the sol–gel synthesis. The photocatalysts synthesized using different concentrations of H₂SO₄ possess specific anatase/rutile ratios and crystallite sizes as well as surface areas, resulting in different photocatalytic performance in the degradation of formic acid in solution. The best photocatalytic performance is observed for the TiO₂ photocatalyst containing a relatively high percentage of the rutile phase (∼84%), which is obtained from the sol–gel synthesis without H₂SO₄.

Original language	English
Article number	025004
Journal	Nano Futures
Volume	5
Issue number	2
DOIs	https://doi.org/10.1088/2399-1984/abfb7d
Publication status	Published - 2021
MoE publication type	A1 Journal article-refereed

Keywords

Bandgap
Formic acid degradation
Photocatalysis
Sol–gel synthesis
TiO

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https://urn.fi/URN:NBN:fi-fe2022120168458

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title = "Bandgap optimization of sol–gel-derived Tio2 and its effect on the photodegradation of formic acid",

abstract = "This work reports a key factor, the H2SO4 concentration, in controlling the physicochemical properties of titanium dioxide (TiO2) photocatalysts during the sol–gel synthesis. The photocatalysts synthesized using different concentrations of H2SO4 possess specific anatase/rutile ratios and crystallite sizes as well as surface areas, resulting in different photocatalytic performance in the degradation of formic acid in solution. The best photocatalytic performance is observed for the TiO2 photocatalyst containing a relatively high percentage of the rutile phase (∼84%), which is obtained from the sol–gel synthesis without H2SO4.",

keywords = "Bandgap, Formic acid degradation, Photocatalysis, Sol–gel synthesis, TiO",

author = "Morad Zouheir and Ouissal Assila and Karim Tanji and {El Gaidoumi}, Abdelali and Javier Ara{\~n}a and Rodr{\'i}guez, {Jos{\'e} Miguel Do{\~n}a} and Jan-Henrik Sm{\aa}tt and Tan-Phat Huynh and Abdelhak Kherbeche",

note = "Funding Information: Authors thank the general research services of the University of Las Palmas de Gran Canaria (Spain) and the innovations center in Sidi Mohammed Ben Abdellah University (Morocco). JHS and TPH acknowledge financial support from the Academy of Finland (Grant Nos. 308307, 323240, and 331774). Publisher Copyright: {\textcopyright} 2021 IOP Publishing Ltd.",

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doi = "10.1088/2399-1984/abfb7d",

language = "English",

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AU - Zouheir, Morad

AU - Assila, Ouissal

AU - Tanji, Karim

AU - El Gaidoumi, Abdelali

AU - Araña, Javier

AU - Rodríguez, José Miguel Doña

AU - Smått, Jan-Henrik

AU - Huynh, Tan-Phat

AU - Kherbeche, Abdelhak

N1 - Funding Information: Authors thank the general research services of the University of Las Palmas de Gran Canaria (Spain) and the innovations center in Sidi Mohammed Ben Abdellah University (Morocco). JHS and TPH acknowledge financial support from the Academy of Finland (Grant Nos. 308307, 323240, and 331774). Publisher Copyright: © 2021 IOP Publishing Ltd.

PY - 2021

Y1 - 2021

N2 - This work reports a key factor, the H2SO4 concentration, in controlling the physicochemical properties of titanium dioxide (TiO2) photocatalysts during the sol–gel synthesis. The photocatalysts synthesized using different concentrations of H2SO4 possess specific anatase/rutile ratios and crystallite sizes as well as surface areas, resulting in different photocatalytic performance in the degradation of formic acid in solution. The best photocatalytic performance is observed for the TiO2 photocatalyst containing a relatively high percentage of the rutile phase (∼84%), which is obtained from the sol–gel synthesis without H2SO4.

AB - This work reports a key factor, the H2SO4 concentration, in controlling the physicochemical properties of titanium dioxide (TiO2) photocatalysts during the sol–gel synthesis. The photocatalysts synthesized using different concentrations of H2SO4 possess specific anatase/rutile ratios and crystallite sizes as well as surface areas, resulting in different photocatalytic performance in the degradation of formic acid in solution. The best photocatalytic performance is observed for the TiO2 photocatalyst containing a relatively high percentage of the rutile phase (∼84%), which is obtained from the sol–gel synthesis without H2SO4.

KW - Bandgap

KW - Formic acid degradation

KW - Photocatalysis

KW - Sol–gel synthesis

KW - TiO

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DO - 10.1088/2399-1984/abfb7d

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AN - SCOPUS:85108667004

SN - 2399-1984

VL - 5

JO - Nano Futures

JF - Nano Futures

IS - 2

M1 - 025004

ER -

Bandgap optimization of sol–gel-derived Tio₂ and its effect on the photodegradation of formic acid

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