Improved visible light photocatalytic degradation of yttrium doped NiMgAl layered triple hydroxides for the effective removal of methylene blue dye

• Published in: Chemosphere (Oxford) Vol. 290; p. 133299
• Main Authors: Kandasamy, Bhuvaneswari, Govindasamy, Palanisamy, Thangavelu, Pazhanivel, Theerthagiri, Jayaraman, Min, Ahreum, Choi, Myong Yong
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.03.2022
• Subjects: Catalysis; Hydroxides; Layered triple hydroxide; Light; Methylene Blue; Photocatalytic degradation; Visible light absorption; Yttrium; Yttrium doped NiMgAl; Yttrium doped NiMgAl; Photocatalytic degradation; Layered triple hydroxide; Visible light absorption; Methylene blue
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2021.133299

Fabrication of layered triple hydroxides (LTH) is a typical and remarkable approach to produce new functionalities passionately investigated for photocatalytic removal of organic pollutants from industrial wastewater. The hydrothermal method was used to prepare different weight percentages of yttrium (Y) doped NiMgAl LTH. The structural, functional, optical, and morphological properties of the prepared samples were investigated using X-ray diffraction, Fourier transformed-infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, and scanning electron microscopy. The photocatalytic degradation of the different percentages of Y-doped LTH samples were assessed through the photocatalytic degradation of methylene blue dye under the visible light irradiation. When compared to other lower concentrations of Y doping, the photocatalytic degradation efficiency of 1 wt.% Y-doped LTH was higher. Thus, the optimized LTH's improved photocatalytic performance was attributed to increased visible light absorption with low transmission and improved electron-hole separation. [Display omitted] •Fabricated Y3+ doped NiMgAl layered triple hydroxide (LTH) via hydrothermal method.•Efficient removal of MB dye was achieved on 1 wt% of Y@NiMgAl LTH.•Doping of Y3+ with LTH increases the separation of charge carriers.•The charge transfer mechanism of the Y3+ doped LTH was discussed in detail.