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Direct Z-scheme red carbon nitride/rod-like lanthanum vanadate composites with enhanced photodegradation of antibiotic contaminants
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2020-06-16 , DOI: 10.1016/j.apcatb.2020.119245
Liquan Jing , Yuanguo Xu , Jie Liu , Minjing Zhou , Hui Xu , Meng Xie , Huaming Li , Jimin Xie

Herein, a novel direct Z-scheme mechanism of red carbon nitride/rod-like LaVO4 (RCNL) photocatalyst was prepared by a simple hydrothermal method. Under visible light irradiation, the photocatalytic degradation experiments on tetracycline (TC) and naproxen (NPX) showed that 5% RCNL material presented the best photocatalytic performance, which was 3 times (TC) and 2.69 times (NPX) higher than pure LaVO4, respectively. The degradation process of tetracycline and naproxen was further analyzed by mass spectrometry, and their possible degradation routes were proposed. The antibacterial results (against Escherichia coli) showed that the degrading products have lower toxicity. The analysis of band structure, electron spin resonance technique and free radical trapping experiments showed that the h+ at valence band of RCN and e- at the conduction band of LaVO4 participated in the final photocatalytic redox process to achieve high redox ability for the rapid degradation of pollutants.



中文翻译:

直接Z方案红色氮化碳/棒状钒酸镧复合材料,增强了抗生素污染物的光降解

在此,通过简单的水热法制备了一种新的直接Z机理的红色氮化碳/棒状LaVO 4(RCNL)光催化剂。在可见光照射下,对四环素(TC)和萘普生(NPX)的光催化降解实验表明,5%RCNL材料表现出最佳的光催化性能,分别比纯LaVO 4高3倍(TC)和2.69倍(NPX),分别。通过质谱对四环素和萘普生的降解过程进行了进一步分析,并提出了可能的降解途径。抗菌效果(针对大肠杆菌))表明降解产物具有较低的毒性。通过对能带结构,电子自旋共振技术和自由基俘获实验的分析表明,RCN价带的h +和LaVO 4的导带的e-参与了最终的光催化氧化还原过程,以实现快速的高氧化还原能力。污染物的降解。

更新日期:2020-06-27
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