Hydrothermal Synthesis and Characterization of Ce3+ Doped Bi2MoO6 for Water Treatment

• Published in: Catalysis letters 2020, Vol.150 (1), p.159-169
• Main Authors: Zhang, Xianghui, Zhang, Haoran, Jiang, Haitao, Yu, Fei, Shang, Zhongrui
• Format: Article
• Language: English
• Subjects: Catalysis; Catalytic activity; Cerium; Chemistry; Chemistry and Materials Science; Crystal lattices; Crystal structure; Holes (electron deficiencies); Hydrothermal crystal growth; Industrial Chemistry/Chemical Engineering; Microspheres; Migration; Morphology; Organometallic Chemistry; Photocatalysis; Photoelectrons; Photoluminescence; Physical Chemistry; Pollutants; Raman spectra; Reflectance; Rhodamine; Scanning electron microscopy; Wastewater; Water treatment; X-ray diffraction
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-019-02924-2

Rhodamine B (RhB) and tetracycline (TC) are the typical organic pollutants in wastewater. More and more attentions have been paid to the removal of them. In the present work, pure and various contents of Ce 3+ doped Bi 2 MoO 6 nanostructures were synthesized by a facile hydrothermal method. They were characterized by X-ray diffraction (XRD), UV–Vis diffuse reflectance spectra (UV–Vis DRS), Raman spectra, photoluminescence spectra, scanning electron microscopy (SEM), N 2 adsorption–desorption tests and X-ray photoelectron spectra. XRD patterns show that the pure and Ce 3+ doped Bi 2 MoO 6 exhibit orthorhombic crystal structure and Ce 3+ is successfully doped into Bi 2 MoO 6 lattice. UV–Vis DRS results indicate that a narrower band gap was obtained after Ce 3+ doped into Bi 2 MoO 6 . SEM images show that the Ce-doped Bi 2 MoO 6 is 3D microspheres constructed by many nanosheets. The photocatalytic activities of the as-prepared samples were evaluated by the degradation of RhB and TC. The 0.5% Ce 3+ doped Bi 2 MoO 6 exhibits the best photocatalytic activity of 96.6% within 20 min for RhB removal and 78.2% within 90 min for TC removal, respectively. The improved photocatalytic activity can be ascribed to the low recombination and easy migration of photogenerated electron hole pairs derived from the better crystallinity, optimum optical absorption activity and morphology of microspheres after Ce 3+ doping. In addition, it also had a good stability and reusability after ten times of recycling experiments. Graphic Abstract