Authors
Cong Li, Yifan Wang, Shasha Shu, Jiamin Shi, Ningyi Chen, Bingjun Pan
Published in
Small (Weinheim an der Bergstrasse, Germany). Pages e75830. Sep 16, 2026. Epub Sep 16, 2026.
Abstract
The conventional Fenton reaction has been identified as an effective approach for degrading heavy-metal complexes; however, its practical application is hampered by issues such as iron sludge formation, low H2O2 utilization efficiency, and consequently, limited degradation performance. We developed a piezocatalytic Fenton (PF) system based on a triple-layer core-shell heterojunction (MoS2-NC@BTO) for the efficient decomplexation of Cu-organic complexes along with the recovery of Cu2+. This system enables the in situ generation and subsequent activation of H2O2 solely by the piezoelectric effect to produce hydroxyl radicals (•OH). The heterostructure was rationally constructed by growing MoS2 nanosheets on an N-doped carbon layer-coated BaTiO3 cubes (BTO), which facilitated decomplexation and copper recovery under ultrasonic vibration. The decomplexation rate constant of MoS2-NC@BTO (0.122 min-1) is 46.7 times greater than that of BTO (0.0026 min-1), and it achieved complete decomplexation and 92% copper recovery efficiency within 60 min. Mechanistic investigations revealed that the core-shell heterojunction promotes charge carrier separation, thereby enhancing the yield of H2O2. Meanwhile, the MoS2 nanosheets strengthen the piezoelectric effect, enabling efficient activation of H2O2 into •OH. Furthermore, the versatility and practical feasibility of the system were validated through the efficient treatment of six other Cu-organic complexes and real effluent matrices.
PMID:
42747388
Bibliographic data and abstract were imported from PubMed on 16 Sep 2026.
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