Influence of various sacrificial reagents on congo red degradation and H2O2 production based on heteroanionic titanium oxycarbide photocatalyst and its mechanism

Combining a rational design strategy with a simple synthetic method to produce an eco-friendly material presents a unique challenge in photocatalysis technology. This work reports the successful synthesis of a heteroanionic titanium oxycarbide photocatalyst—TiO 0.25 C 0.75 (TiOC) via a solid-state r...

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Bibliographic Details
Published inIonics Vol. 29; no. 6; pp. 2435 - 2447
Main Authors Subramanian, Yathavan, Dhanasekaran, Anitha, Omeiza, Lukman Ahmed, Zaini, Juliana Haji, Irvine, John T.S., Azad, Abul K.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2023
Springer Nature B.V
Subjects
Carrier mobility
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Conduction bands
Current carriers
Decomposition reactions
Degradation
Electrochemistry
Energy Storage
Evolution
Hydrogen peroxide
Isopropanol
Optical and Electronic Materials
Original Paper
Oxycarbides
Photocatalysis
Photocatalysts
Reagents
Renewable and Green Energy
Titanium
Hydrogen peroxide generation
Titanium oxycarbide
Congo red
Photocatalysis
Heteroanionic photocatalyst
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Summary:Combining a rational design strategy with a simple synthetic method to produce an eco-friendly material presents a unique challenge in photocatalysis technology. This work reports the successful synthesis of a heteroanionic titanium oxycarbide photocatalyst—TiO 0.25 C 0.75 (TiOC) via a solid-state reaction and employed for the decomposition of Congo red (CR) and H 2 O 2 generation from water under visible light radiation. Initially, TiOC demonstrated a moderate CR degradation efficiency of 54% (1 g/L) in 120 min and evolved a minimal amount of H 2 O 2 after 90 min (2 mmol) and 120 min (10 mmol) of light exposure. This clearly indicates that the localization of hybridization of O-2p and C-2p orbitals and a more positive conduction band edge (CB) of TiOC lead to reduced carrier mobility and, consequently, high recombination of photogenerated charge carriers. Therefore, sacrificial reagents such as H 2 O 2 and isopropyl alcohol (ISA) were employed to improve CR removal and H 2 O 2 evolution rate, resulting in 70% and 21.5 mmol (120 min), respectively. Graphical abstract
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-023-05006-x