Preparation of W- and Mo-doped VO2(M) by ethanol reduction of peroxovanadium complexes and their phase transition and optical switching properties

• Published in: Journal of alloys and compounds 2012-12, Vol.544, p.30-36
• Main Authors: Zhang, Yifu, Li, Wei, Fan, Meijuan, Zhang, Fangfang, Zhang, Juecheng, Liu, Xinghai, Zhang, Haining, Huang, Chi, Li, Houbin
• Format: Article
• Language: English
• Subjects: Chemical synthesis; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Differential scanning calorimetry; Doped; Ethanol; Ethyl alcohol; Exact sciences and technology; Materials science; Materials synthesis; materials processing; Molybdenum; Optical properties; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Optical switching; Phase transition; Physics; Scanning electron microscopy; Tungsten; Vanadium dioxide; Vanadium oxides; X-rays
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2012.07.093

► W- and Mo-doped VO2(M) with a various doped contents were synthesized. ► The doped VO2(M) has a belt-like morphology. ► The Tc of doped VO2(M) can be simply tuned by changing the doping concentration. ► The doped VO2(M) has thermochromic characters and optical switching properties. Thermochromic W- and Mo-doped VO2(M) with a various doped contents were successfully synthesized using peroxovanadium (V) complexes as the vanadium precursor and green solvent (ethanol) as the reducing agent by a facile hydrothermal approach and subsequent calcination for the first time. The samples were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), inductive coupled plasma emission spectrometer (ICP), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR). The results revealed that W or Mo atoms were successfully doped into the crystal lattice of VO2 matrix, and the as-prepared W- and Mo-doped VO2(M) had a belt-like morphology. The phase transition temperature of doped VO2(M) could be simply tuned by changing the doping concentration of W or Mo atoms. The variable-temperature infrared spectra disclosed that the doped VO2(M) had outstanding thermochromic characters and optical switching properties.