Synthesis and characterization of self-assembling (NH4)0.5V2O5 nanowires

A simple and direct method for synthesis of vanadium oxide ribbon-like manobelts

“…The synthesis and characterization of vanadium oxide nanostructures have been developed extensively. Hydrothermal treatment of ammonium metavanadate with water gives self-assembling (NH 4 ) 0.5 .V 2 O 5 nanowires [3]. Some self-assembled nanobelts are observed with a thickness of 18 nm and width of 100-200 nm.…”

“…In recent years, there has been and increased interest in synthesizing quasi one-dimensional (1D) nanostructures of vanadium oxides and their derivative compounds [1][2][3][4][5][6][7][8][9]. This is due to their potential applications such as catalysts [10], cathode materials for lithium batteries [11], high-energy density lithium batteries [12], chemical sensors [13], electric field-effect transistors [14], and electrochemical and optical devices [15][16].…”

Room temperature vanadium dioxide–carbon nanotube gas sensors made via continuous hydrothermal flow synthesis

“…S9 in the supporting information), which suggests surface formation of NH4 + after exposing the samples to 50 ppm of NH3 for 30 min. The appearance of the band at 1409 cm -1 (the N-H in-plane bending vibration mode) 75 has previously been attributed to the formation of NH4 + ions 76 , which would cause drift in the baseline resistance of the sensing layer. There was little difference between the response magnitudes observed for the VO2-CNT sensors, even though the sensors containing SWCNTs were much less resistive (by a factor of at least 10) than those containing MWCNTs (Fig.…”

Structural hierarchy of NH4V3O7 particles prepared under hydrothermal conditions

“…The electroneutrality of a charged V-O framework can be compensated using appropriate amount of intercalated metal or complex cations, such as ammonium [6][7][8][9]. Particularly, to date, a few compounds in the family of ammonium polyvanadates are known -NH 4 V 4 O 10 [9][10][11][12], NH 4 V 4 O 14 [13], (NH 4 ) 2 V 3 O 8 [14], NH 4 V 3 O 7 [15].…”

“…Particularly, to date, a few compounds in the family of ammonium polyvanadates are known -NH 4 V 4 O 10 [9][10][11][12], NH 4 V 4 O 14 [13], (NH 4 ) 2 V 3 O 8 [14], NH 4 V 3 O 7 [15]. Large NH + 4 -ions stabilize the internal pillarlike cavities within the vanadate frameworks, leading to enhanced diffusion rate of lithium ions.…”