Photochemical properties and structure characterization of (BiO)2CO3 nanowires doped with alkaline-earth metal ions. (June 2017)

• Record Type: Journal Article
• Authors: Cui, Kuixin; He, Yuehui; Guo, Yujiao; Jin, Shengming
• Is Part Of: Materials research bulletin. Volume 90(2017)
• Page Start: 111
• Page End: 118
• Publication Date: 2017-06
• Subjects: Photoluminescence -- (BiO)2CO3 nanowires -- Alkaline-earth metal -- Ion-doped (BiO)2CO3 nanowires -- Photocatalytic activity; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.02.026
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Wire-like (BiO)2 CO3 and alkaline-earth metal ions doped-(BiO)2 CO3 were prepared. The cell parameters of doped nanowires shifted from those of pure nanowires. TEM images show the doped ions introduced internal defects into (BiO)2 CO3 nanowires. Doping ions altered PL emission intensity of (BiO)2 CO3 nanowires. Alkaline-earth metal ions doped-(BiO)2 CO3 had enhanced photocatalytic activity. Abstract: The photoluminescence (PL) properties and photocatalytic activities of pure (BiO)2 CO3 nanowires and (BiO)2 CO3 nanowires doped with alkaline-earth metal ions (Mg 2+, Ca 2+, and Sr 2+ ) were studied. X-ray diffraction (XRD) studies confirmed that the as-prepared nanowires were orthogonal (BiO)2 CO3 and the calculated cell parameters of alkaline-earth metal ions doped-(BiO)2 CO3 nanowires shifted from those of pure (BiO)2 CO3 nanowires. High-resolution transmission electron microscopy (HRTEM) images demonstrated that numerous defects were introduced into (BiO)2 CO3 nanowires by the doped ions. PL observations showed that (BiO)2 CO3 doping altered the relative intensity of PL emissions, by particularly lowering the emission at 467 nm. The Sr 2+ ions and Ca 2+ ions showed the strongest and weakest effect on the PL property of (BiO)2 CO3 nanowires, respectively. The alkaline-earth metal ions doped nanowires had enhanced photocatalytic activities, comparing to the pure nanowires. Therefore, the PL property and photochemical performance of (BiO)2 CO3 nanowires were expected to be adjusted by doping with various cations.