毛娜,马欣玥,唐嘉璇

• 1:渭南师范学院化学与材料学院

摘要(Abstract)：

针对g-C_3N_4对可见光响应效率低和光生电子-空穴分离效率较低的问题，提出将半导体负载到g-C_3N_4表面的方法，可以提升g-C_3N_4在光催化降解有机污染物中的应用。文中采用浸渍法合成了三元复合材料NiO/Fe_2O_3/g-C_3N_4，对复合材料进行X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、荧光光谱（PL）等表征，研究NiO/Fe_2O_3/g-C_3N_4复合材料对土霉素（OTC）光催化降解的性能。研究结果表明，在可见光-类Fenton体系中，OTC的降解率达89.1%。在添加空穴捕获剂三乙醇胺后，OTC溶液的降解效率由89.1%下降至42.1%，空穴(h~+)、超氧自由基(·O_2~-)和羟基自由基(·OH)是OTC降解过程的主要影响因素。复合材料具有良好的光催化性能是因为Fe_2O_3与NiO半导体和g-C_3N_4形成双S-Scheme异质结可以有效地将电子和空穴分离，抑制电子空穴复合。研究结论为异质结催化剂协同光-Fenton在污水处理中的应用提供参考。

关键词(KeyWords)： 光催化降解;双S-Scheme;NiO/Fe_2O_3/g-C_3N_4复合材料;异质结;可见光-Fenton体系;土霉素

Abstract:

Keywords:

基金项目(Foundation): 陕西省教育厅重点实验室（20JS046）;; 渭南市科技局（2021ZDYF-JCYJ-282）

作者(Author): 毛娜,马欣玥,唐嘉璇

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