可见光下光催化降解亚甲基蓝的CeO2/CuO纳米复合材料的合成与表征

A. Raees, M. Jamal, I. Ahmed, Mika Silanpaa, T. Saad Algarni
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引用次数: 26

摘要

从受污染的水体中去除有害的有机染料需要在工业废水中引入强吸附剂和光催化剂。本文采用共沉淀法合成了光催化CeO2纳米颗粒和CeO2/CuO纳米复合材料,用于低成本水中亚甲基蓝(MB)的洗脱。利用x射线粉末衍射(XRPD)、场发射扫描电镜(FE-SEM)、能量色散光谱(EDS)、紫外可见光谱(UV-Vis)和傅里叶变换红外光谱(FTIR)等表征技术对制备的材料的结晶度和表面结构进行了分析。两种纳米尺度样品的平均粒径约为20-30 nm。研究了CeO2/CuO在可见光下对亚甲基蓝的光催化性能。紫外可见光谱检测结果表明,3 h内对MB有机污染物的光降解率为91%。吸收峰出现在670 nm左右,对应于MB的降解。这样的输出显示了Ce纳米复合材料对环境效益的有效性。因此,CeO2/CuO纳米复合材料可用于去除工业废水中有害的MB染料。
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Synthesis and Characterization of CeO2/CuO Nanocomposites for Photocatalytic Degradation of Methylene Blue in Visible Light
Removal of hazardous organic dyes from polluted water bodies requires the introduction of strong adsorbents and photocatalysts to industrial wastewaters. Herein, photocatalytic CeO2 nanoparticles and CeO2/CuO nanocomposite were synthesized following a co-precipitation method for low cost elution of methylene blue (MB) from water. The crystallinity and surface structure of the as-prepared materials have been analyzed using characterization techniques including X-ray powder diffraction (XRPD), field emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS), ultra-violet visible spectroscopy (UV–Vis), and Fourier-transform infrared spectroscopy (FTIR). The average particle size of both the nano scaled samples were approximately 20–30 nm. The photocatalytic properties of CeO2/CuO were investigated under visible light against methylene blue (MB). The results showed 91% photodegradation of MB organic pollutant in 3 h as monitored by UV–Vis spectroscopy. Absorbance peaks appeared at around 670 nm corresponding to degradation of MB. Such output displayed the effectiveness of Ce nanocomposites for environmental benefits. Hence, CeO2/CuO nanocomposite could be useful for treatment of industrial wastewaters by removing hazardous MB dye.
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