构建 SnO/g-CN 有效纳米复合材料用于光催化降解阿莫西林和制药废水。
Construction of SnO/g-CN an effective nanocomposite for photocatalytic degradation of amoxicillin and pharmaceutical effluent.
机构信息
Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603 203, India.
Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.
出版信息
Environ Res. 2022 Jun;209:112809. doi: 10.1016/j.envres.2022.112809. Epub 2022 Jan 29.
The current study mainly focused on the fabrication of 2D graphitic carbon nitride-supported tin oxide nanoparticles (SnO/g-CN) for the effective degradation of Amoxicillin (AMX). Tin oxide (SnO) NPs were prepared by green and easy modification technique, and then it is decorated over g-CN nanosheets. The structural morphology and surface composition of the synthesized SnO/g-CN nanocomposite were fully analysed by UV-Vis, XRD, XPS, and HR-SEM with EDAX, FT-IR, and BET analysis. The (HR-TEM) microscopy, the size of SnO NPs which as a diameter is about 6.2 nm. The Raman analysis revealed that the SnO/g-CN composite had a moderate graphitic structure, with a measured I/I value of 0.79. The degradation efficiency of antibiotic pollutant AMX and pharma effluent treatment was monitored by UV spectroscopy. The optical band gap of SnO (2.9 eV) and g-CN (2.8 eV) photocatalyst was measured by Tauc plots. To investigate the mechanism through the photodegradation efficiency of the catalyst was analysed by using different Scavenger EDTA-2Na holes (h) has a greater contribution towards the degradation process. Under visible irradiation, SnO/g-CN nanocomposite has exhibited an excellent degradation performance of 92.1% against AMX and 90.8% for pharmaceutical effluent in 80 min.
本研究主要致力于制备二维石墨相氮化碳负载氧化锡纳米粒子（SnO/g-CN），以有效降解阿莫西林（AMX）。采用绿色、易修饰的技术制备氧化锡（SnO）纳米粒子，然后将其修饰在 g-CN 纳米片上。通过 UV-Vis、XRD、XPS、HR-SEM 与 EDAX、FT-IR 和 BET 分析，对合成的 SnO/g-CN 纳米复合材料的结构形貌和表面组成进行了全面分析。（HR-TEM）显微镜，SnO NPs 的尺寸约为 6.2nm。拉曼分析表明，SnO/g-CN 复合材料具有适度的石墨结构，I/I 值为 0.79。通过紫外光谱监测抗生素污染物 AMX 和制药废水的处理降解效率。通过 Tauc 图测量 SnO（2.9eV）和 g-CN（2.8eV）光催化剂的光学带隙。为了研究通过光催化剂的光降解效率来分析机制，使用不同的清除剂 EDTA-2Na 研究了空穴（h）对降解过程的贡献更大。在可见光照射下，SnO/g-CN 纳米复合材料在 80 分钟内对 AMX 的降解性能达到 92.1%，对制药废水的降解性能达到 90.8%。
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