X射线光电子能谱
可见光谱
材料科学
扫描电子显微镜
降级(电信)
化学工程
表面等离子共振
光催化
光化学
纳米技术
催化作用
纳米颗粒
光电子学
化学
有机化学
工程类
复合材料
电信
计算机科学
作者
Jiajie Yu,J. Kiwi,Tianhe Wang,C. Pulgarín,Sami Rtimi
出处
期刊:Catalysts
[MDPI AG]
日期:2019-11-02
卷期号:9 (11): 916-916
被引量:40
摘要
This study presents the first evidence for the photocatalytic performance of ZnO/CuxO hexagonal nanowires leading to sulfamethazine (SMT) degradation. The chemical composition of the nanowires was determined by X-ray fluorescence (XRF). The sample with the composition ZnO/Cux = 1.25O led to faster SMT-degradation kinetics. The SMT-degradation kinetics were monitored by high performance liquid chromatography (HPLC). The morphology of the hexagonal nanowires was determined by scanning electron microscopy (SEM) and mapped by EDX. The redox reactions during SMT degradation were followed by X-ray photoelectron spectroscopy (XPS). The interfacial potential between the catalyst surface and SMT was followed in situ under solar and indoor visible light irradiation. SMT-degradation was mediated by reactive oxidative species (ROS). The interfacial charge transfer (IFCT) between ZnO and CuxO is shown to depend on the type of light used (solar or visible light). This later process was found to be iso-energetic due to the potential energy positions of ZnO and CuxO conduction bands (cb). The intervention of surface plasmon resonance (LSPR) species in the SMT degradation is discussed.
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