Influence of various sacrificial reagents on congo red degradation and H2O2 production based on heteroanionic titanium oxycarbide photocatalyst and its mechanism
Abstract
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—TiO0.25C0.75 (TiOC) via a solid-state reaction and employed for the decomposition of Congo red (CR) and H2O2 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 H2O2 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 H2O2 and isopropyl alcohol (ISA) were employed to improve CR removal and H2O2 evolution rate, resulting in 70% and 21.5 mmol (120 min), respectively.
Citation
Subramanian , Y , Dhanasekaran , A , Omeiza , L A , Zaini , J H , Irvine , J T S & Azad , A K 2023 , ' Influence of various sacrificial reagents on congo red degradation and H 2 O 2 production based on heteroanionic titanium oxycarbide photocatalyst and its mechanism ' , Ionics , vol. 29 , pp. 2435-2447 . https://doi.org/10.1007/s11581-023-05006-x
Publication
Ionics
Status
Peer reviewed
ISSN
0947-7047Type
Journal article
Description
Funding: Universiti of Brunei Darussalam for the UGS scholarship for PhD research.Collections
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