TayNb1−yVO5 (0<y<1) mixed oxides synthesized by sol–gel method: electrochemical Li+-insertion

Coprecipitation synthesis and negative thermal expansion of NbVO5

“…9 Afterwards, J. M. Amarilla and colleagues extended their previous work to prepare Li-MVO 5 (M = Nb,Ta) and Nb 1-x Ta x VO 5 (0 < x < 1) by the sol-gel route and investigated the electrochemical properties. 5,7,10 This sol-gel route has become a common way to produce pure niobium vanadate oxide in the subsequent catalysts study. 6 M. M. Devillers et al developed an approach to synthesize Nb 1-x Ta x VO 5 and Nb-based oxides from molecular precursors based on EDTA, whereas, pure NbVO 5 has not been achieved.…”

A mechanochemical route for the synthesis of VNbO5 and its structural re-investigation using structure solution from powder diffraction data

“…The occurrence of such exothermic peak confirms that the amorphous substance obtained by extensive ball milling possesses chemical composition and viscosity regimes similar to those obtained after sol-gel and co-precipitation syntheses. 9,13 In these works the thermogram profiles exhibited, in fact, a characteristic crystallization temperature in the range 705 -745 K, which results in the formation of orthorhombic VNbO5.…”

“…[1][2][3][4][5][6][7][8][9] In this context, different studies have shown that the V/Nb ratio is a fundamental parameter positively influencing the reactivity/selectivity of several chemical reactions. 3,5,6,8,9 The VNbO5 compound (V/Nb ratio of 1), which is supposed to be isostructural with TaVO5 (space group Pnma), has shown interesting properties compared to other different V/Nb ratios. 3,5 For example, Ballarini et al 3 demonstrated that VNbO5 acts as precursor for the formation of highly catalytic species during the oxidehydrogenation of propane.…”

“…12 Further approaches, recently reported in literature, involved sol-gel techniques with the use of organometallic reagents, metal alkoxides and organic precursors or, alternatively, co-precipitation methods. 9,13 However, the expensive and hazardous organometallic salt reagents used as metal sources, together with the formation of undesired by-products, limit significantly the extensive use of these synthesis routes.…”

NbVO5 Mesoporous Thin Films by Evaporation Induced Micelles Packing: Pore Size Dependence of the Mechanical Stability upon Thermal Treatment and Li Insertion/Extraction

“…14,15 The distortion occurring upon the first Li + intercalation is attributed to the fact that, in the NbVO 5 structure, V 5+ occupies tetrahedral sites. These sites are too small to accommodate the V 4+ species formed after Li + intercalation, leading to a deformation of the oxygen network and consequently to the trapping of Li + species inside the framework.…”