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Journal of Colloid and Interface Science

Journal of Colloid and Interface Science

IF: 9.4
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Carbon-dot-induced oxygen vacancies in copper vanadate enabling persulfate photoactivation for tetracycline degradation

Published:11 December 2024 DOI: 10.1016/j.jcis.2024.12.065 PMID: 39673936
Ernan Pang,?Shijia Li,?Jie Wu,?Qing Chang,?Ning Li,?Shengliang Hu

Abstract

Synchronously creating oxygen vacancies (OVs) and an internal electric field (IEF) in photocatalysts could be an ideal strategy to facilitate photogenerated charge separation and surface reactions but remain unexplored for this use. In this work, we report that low-cost and multifunctional CDs can involve in the nucleation reaction of copper vanadates (CuVs) to create OVs and proper IEF at the interface by modulating the valence states of coppers under hydrothermal conditions. Thus, CDs synergistically serve as oxygen vacancy inducer and charge separator in CuVs to extract photogenerated carriers to trigger persulfate (PS) activation for the degradation of tetracycline hydrochloride (TC). It turns out that CDs-modulated CuVs exhibit the expected photocatalytic capacity to activate PS in water and enable TC decomposition efficiency approximately 8 times higher than CDs-free CuVs under visible light irradiation. Our investigations elucidate that the oxidative breakdown of TC is dominated by the active species cooperation of 1O2 with h+ and OH formed in photocatalytic reaction system.

Substances (2)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Sodium hydroxide 1310-73-2 NaOH 1357 suppliers $14.00-$17490.00
Formic acid 64-18-6 CH2O2 1231 suppliers $7.62-$9092.41

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