无机/有机S型异质结构建及高级氧化技术协同光热降解抗生素研究

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中图分类号：0643 doi： 10.1016/j.actphy.2025.100187

Advanced oxidation technology synergistic photothermal degradation of antibiotics over inorganic/organic S-scheme heterojunction

Qiang Cheng1， Jingping Li 1， Zhendong Ke ²*， Jiaming Li ¹， Kai Wang 1*

1 College of Urban and Environmental Sciences， Huangshi Key Laboratory of Prevention and Control of Soil Pollution， Hubei Normal University， Huangshi ， Hubei Province， China.

² Huangshi Ecological Environment Monitoring Center， Department of Ecology and Environment of Hubei Province， Huangshi 435ooo， Hubei Province， China.

Abstract：The rational engineering of inorganic/organic catalysts capable of concomitant utilization of solar energy and advanced oxidation processes （AOPs） holds significant promise for the degradation of antibiotic contaminants. The study developed MoO2-x/g-C3N4 （MOCN） S-scheme heterojunctions with oxygen vacancies using a ultrasonic-assisted integration technique，employing them as solar-driven peroxymonosulfate （PMS） catalysts for the degradation of antibiotics. The formation of an internal electric field between MoO2-x and gC3N4. ， along with the charge transfer pathway in the S-scheme heterojunction， was confirmed using density functional theory， femtosecond transient absorption spectroscopy，and in-situ XPS analysis. Meanwhile， the oxygen vacancy and photothermal efect of the MOCN heterojunction further accelerate the electron migration rate. The optimized MOCN-2 catalyst achieved 90.9% tetracycline （TC） removal within 20min compared to pristine MoO2-x and g-C3N4 . Continuous flow experiments and bactericidal activity experiments together validated the practical feasibility of this catalyst for Water treatment applications.The analysis above led to the proposal of a possble mechanism for TC degradation. This research brings forward new strategies for the synthesis of S-scheme heterojunctions to improve wastewater treatment.

Key Words： Advanced oxidation technology； Inorganic/organic heterojunction; S-scheme mechanism; Antibiotics degradation; Photothermal effect

1引言

近年来，医药及个人护理产品（PPCPs，以抗生素为代表）在医疗、农业和水产养殖等领域的广泛使用，使其日益加重的环境负荷成为紧迫问题。（剩余21780字）