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<p>Piezoelectric enhanced photocatalytic purification of polluted wastewater is currently one of the better strategies for environmental pollution control. This work proposes a novel and efficient approach for the purification of tetracycline hydrochloride (TC) wastewater via core-shell MoS<sub>2</sub>/ZnO heterojunction activated by peroxodisulfate (PDS), where the MoS<sub>2</sub>/ZnO heterojunction was fabricated via a hydrothermal route. By exploiting the intrinsic piezoelectric properties of both MoS<sub>2</sub> and ZnO, the heterojunction generates an internal electric field that facilitates the separation of photogenerated electron-hole pairs, thereby accelerating the photocatalytic purification. Under the optimized conditions, the TC purification efficiency can reach 91.2% with the collaborative assistance of PDS activation, and the MoS<sub>2</sub>/ZnO heterojunction also exhibited excellent recyclability, maintaining a purification efficiency of 90.76% over five cycles. The MoS<sub>2</sub>/ZnO heterojunction demonstrated robust photocatalytic activity under visible-light irradiation and aeration, with the purification kinetics conforming to a pseudo-first-order model. And the purification pathways of TC were systematically investigated, and the dominant reactive oxygen species involved in the process were identified. This work elucidates the underlying piezoelectric-photocatalytic mechanism and provides a sustainable strategy for the efficient removal of antibiotic contaminants from aqueous environments, offering significant potential for practical environmental remediation applications.</p>

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Piezoelectric-enhanced photocatalytic purification of wastewater containing tetracycline via MoS2/ZnO heterojunction

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Chen-yu Yang,
  • Ting-ting Yu,
  • Yu-qi He,
  • Jia-jun Li,
  • Yong-hang Zhang,
  • Ji-zhou Jiang

摘要

Piezoelectric enhanced photocatalytic purification of polluted wastewater is currently one of the better strategies for environmental pollution control. This work proposes a novel and efficient approach for the purification of tetracycline hydrochloride (TC) wastewater via core-shell MoS2/ZnO heterojunction activated by peroxodisulfate (PDS), where the MoS2/ZnO heterojunction was fabricated via a hydrothermal route. By exploiting the intrinsic piezoelectric properties of both MoS2 and ZnO, the heterojunction generates an internal electric field that facilitates the separation of photogenerated electron-hole pairs, thereby accelerating the photocatalytic purification. Under the optimized conditions, the TC purification efficiency can reach 91.2% with the collaborative assistance of PDS activation, and the MoS2/ZnO heterojunction also exhibited excellent recyclability, maintaining a purification efficiency of 90.76% over five cycles. The MoS2/ZnO heterojunction demonstrated robust photocatalytic activity under visible-light irradiation and aeration, with the purification kinetics conforming to a pseudo-first-order model. And the purification pathways of TC were systematically investigated, and the dominant reactive oxygen species involved in the process were identified. This work elucidates the underlying piezoelectric-photocatalytic mechanism and provides a sustainable strategy for the efficient removal of antibiotic contaminants from aqueous environments, offering significant potential for practical environmental remediation applications.