Physics Department, Faculty of Science, Damanhour University, Damanhour 22516, Egypt E-mail:
Physics Department, Faculty of Science, Damanhour University, Damanhour 22516, Egypt.
Water Sci Technol. 2023 Jul;88(2):392-407. doi: 10.2166/wst.2023.217.
The current paper outlines the synthesis of pristine multi-wall carbon nanotubes (PMWCNTs)/Vanadium pentoxide VO and functionalized multi-wall carbon nanotubes (FMWCNTs)/VO nanocomposite for photocatalytic applications. The FMWCNTs were obtained by the oxidizing agents (HSO and HNO) to introduce the oxygenated functional groups. The samples were synthesized by hydrothermal approach and investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy analysis (EDX), and Fourier transform infrared spectroscopy (FTIR). The photocatalytic activity of multi-wall carbon nanotubes (MWCNTs), FMWCNTs/VO, and PMWCNTs/VO nanocomposites was assessed via methylene blue (MB) degradation from water under visible light. The results demonstrated that the removal efficiency of MB by PMWCNTs, FMWCNTs/VO, and PMWCNTs/VO could reach 90.4, 98.9, and 94.9%, respectively. It was noticed that MB adsorption and photodegradation tend to follow pseudo-second-order kinetics. The mechanism of MB photodegradation by FMWCNTs/VO nanoparticles was explained. MWCNTs/VO nanocomposites will allow further applications to remove other dyes and contaminants from wastewater.
本文概述了原始多壁碳纳米管（PMWCNTs）/五氧化二钒（VO）和功能化多壁碳纳米管（FMWCNTs）/VO 纳米复合材料在光催化应用中的合成。FMWCNTs 通过氧化剂（HSO 和 HNO）氧化来引入含氧官能团。样品通过水热法合成，并通过 X 射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能谱分析（EDX）和傅里叶变换红外光谱（FTIR）进行了研究。通过在可见光下从水中降解亚甲基蓝（MB）评估了多壁碳纳米管（MWCNTs）、FMWCNTs/VO 和 PMWCNTs/VO 纳米复合材料的光催化活性。结果表明，PMWCNTs、FMWCNTs/VO 和 PMWCNTs/VO 的 MB 去除效率分别达到 90.4%、98.9%和 94.9%。注意到 MB 的吸附和光降解倾向于遵循拟二级动力学。解释了 FMWCNTs/VO 纳米粒子光降解 MB 的机理。MWCNTs/VO 纳米复合材料将允许进一步应用于从废水中去除其他染料和污染物。
