原位构筑双S-Scheme NiO/Fe2O3/g-C3N4 异质结协同可见光-Fenton催化降解土霉素
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关键词：光催化降解；双S-Scheme； NiO/Fe2O3/g-C3N4 复合材料；异质结；可见光-Fenton体系；土霉素
中图分类号：0643.3 文献标志码：A DOI： 10.3969/j.issn.1003-9015.2025.00.030
Abstract： Aiming at the problems of low response efficiency of g-C3N4 to visible light and low separation efficiency of photogenerated electron-hole， a method of loading semiconductors onto the surface of g-C3N4 is proposed， which can improve the application of g-C3N4 in the photocatalytic degradation of organic pollutants. NiO/Fe2O3/g-C3N4 composites were synthesized by immersion method， and characterized by XRD，FT-IR and PL. The research results show that the degradation rate of OTC can reach 89.1% under photo-Fenton system. After the addition of TEOA， the degradation efficiency of OTC solution decreased from 89.1% to 42.1% . It can be concluded that hole （h+） ，superoxide radical （⋅O2-⋅） and hydroxyl radical （·OH） were the main factor affecting the degradation process of OTC. NiO/Fe2O3/g-C3N4 photocatalytic composites have good photocatalytic degradation effect on OTC solution because double-S Scheme heterojunction formed between Fe2O3 ，NiO and g-C3N4 semiconductor can effectively separate electrons and holes and inhibit electron hole recombination.The research conclusion provides a reference for theapplication of heterojunction catalysts in conjunction with photo-Fenton in wastewater treatment.
Key words： photocatalytic degradation； double S-Scheme； NiO/Fe2O3/g-C3N4 composite； heterojunction;photo-Fenton system；oxytetracycline
1前言
随着环境污染和能源危机的不断加剧，寻找高效、可持续的能源转换和污染治理技术已成为当今科学研究的热点之一[1-4]。（剩余20339字）