One-step hydrothermal synthesis and characterization of Mg/Mo co-doped VO2 nanorods

Abstract

This paper reports the successful syntheses of Mg/Mo co-doped thermochromic vanadium dioxide nanorods by hydrothermal technique. In particular, the effect of magnesium and molybdenum co-doping on insulator-metal transition of vanadium dioxide was investigated. The synthesized Mg/Mo co-doped VO 2 nanorods exhibited high purity and crystallinity. X-ray diffraction, scanning electron microscopy, X-ray energy-dispersive spectrometer, transmission electron microscopy, and Fourier transform (FTIR) were used to study the structure and morphology of the as-synthesized rods. X-ray diffraction patterns of the samples show an increase in intensity and a slight shift in the peaks toward lower 2-theta with increasing dopant concentration. The co-doping reduces ΔT c and has been considered as an effective method for manipulating the phase change in VO 2 . The results revealed that smart radiation devices based on Mg/Mo co-doping of VO 2 can be a promising material for thermal control of spacecraft.

Análisis de la microestructura de humos de soldadura de aceros de bajo y medio contenido de carbon

“…Peaks in the band range of 1012 and 420 cm -1 were obtained due to the tension of the metal oxide bonds. The FTIR peaks of the elements in the source fume obtained according to EDS analysis were consistent with the literature Al-O (Jamal et al, 2014;Benykhlef et al, 2016;Yi et al, 2018) (Basu et al, 2011;Farzaneh and Najafi, 2011;Abdullah et al, 2014), Cu-O (Zheng et al, 2010;Sahai et al, 2016;Ponmudi et al, 2019), Fe-O (Abdullah et al, 2014;Golbabaei and Khadem, 2015), Mn-O (Chen and He, 2008;Sevilla and Fuertes, 2009;Lin et al, 2012) (Saikia and Parthasarathy, 2010;Vaculikova et al, 2011;Diko et al, 2016;Bahah et al, 2019;Mohammadi et al, 2019), Ti-O (Jamal et al, 2014), V-O (Wang et al, 2006;Habtemariam et al, 2019), Zr-O (Wang et al, 2019b) metal oxides and oxide structures in different structures because metal oxides generally exhibit peaks below 1000 cm -1 , which may be caused by inter-atomic vibrations (Lagashetty et al, 2007).…”

“…According to the peak values shown in Fig. 4; 3296, peaks in the band range of 2921 cm -1 (Ehrman et al, 1999;Jenkins et al, 2005a;Jenkins and Eagar, 2005b;Wang et al, 2006;Chen and He, 2008;Sowards et al, 2008;Sevilla and Fuertes, 2009;Gibot and Vidal, 2010;Saikia and Parthasarathy, 2010;Zheng et al, 2010;Vaculikova et al, 2011;Basu et al, 2011;Farzaneh and Najafi, 2011;Lin et al, 2012;Abdullah et al, 2014;Jamal et al, 2014;Golbabaei and Khadem, 2015;Naushad et al, 2015;Diko et al, 2016; Sahai et al, 2016;Benykhlef et al, 2016;Yi et al, 2018;Ge et al, 2019;Habtemariam et al, 2019;Bahah et al, 2019;Abinaya et al, 2019;Alias et al, 2019;Altunal et al, 2019;Boroń et al, 2019;Reddy et al, 2019;Karthik et al, 2019;Karunathilaka et al, 2019;Kono et al, 2019;Mohammadi et al, 2019;Ponmudi et al2019;Scaccia et al, 2019;Wang et al, 2019a;Wang et al, 2019b;Yang et al, 2019), indicate O-H bonding i...…”

Opportunities from Doping of Non‐Critical Metal Oxides in Last Generation Light‐Conversion Devices

“…[89,90] In a recent study, [91] the Rietveld refinement of the X-ray diffraction pattern allowed to unveil the modifications of wurtzite ZnO structure upon doping with Ce, Fe, Co ions. In a further example, [92] dealing with Mg/Mo co-doped thermochromic vanadium dioxide nanorods, an increase in the intensity of the Bragg peaks of Mg-doped VO 2 was observed with increasing dopant concentration, which was ascribed by the authors to an increasing in the VO 2 crystallinity by increasing the dopant level. In a further contribution, [93] XRD analysis of V 1−x W x O 2 films evidenced how the reflections were shifted to smaller angles, indicating a small enlargement of the crystal Figure 6.…”