Synthesis of vanadium pentoxide nanoneedles by physical vapour deposition and their highly sensitive behavior towards acetone at room temperature

Abstract

The V 2 O 5 nanoneedles were synthesized by a facile physical vapour deposition approach. XRD patterns confirm good crystallinity of the as prepared nanoneedles.Chemical states of V 2 O 5 nanoneedles were confirmed through XPS analysis. Sensors based on V 2 O 5 nanoneedles were investigated for four types of gases (acetone, ammonia, ethanol and propylamine) at room temperature. High reproducible response and good selective behavior towards acetone was observed in both low and high concentration zones with the low detection limit of 941 ppb, which was explained on the basis of energy band model. The sensing mechanism has also been suggested.

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

“…2. Room temperature gas sensors based on single phase semiconducting metal oxide nanostructures 2.1 N-type semiconducting metal oxide nanostructures and gas sensors N-type SMONs are the most reported sensing materials for RT resistive gas sensors, and they include ZnO, [152][153][154][155][156] SnO 2 , [157][158][159][160] In 2 O 3 , 161 WO 3 , 162 TiO 2 , [163][164][165][166] Fe 2 O 3 , [167][168][169] MoO 3 , 170 174 acetone, 175 alcohol, 106 HCHO, 176 liquefied petroleum gas (LPG), etc. Table 1 summarizes some of the reported RT sensors using the n-type SMONs.…”

Metal Oxide Semiconductor: Future Material For Gas Sensors And It’s Synthesis Techniques

“…Vanadium pentoxidenano-needles for acetone sensor were synthesized by PVD method by Hakim et.al. Sensors sensitivity was tested by taking the acetone, ammonia, ethanol, propylamine at room temperature of concentration range 8.63-140 ppm and it showed better selectivity towards acetone gases [25]. Wei et.al have synthesized hollow porous flower like In 2 O 3 for gas sensor application.…”

Ruthenium-decorated vanadium pentoxide for room temperature ammonia sensing

“…3,4,7,8 The literature also reports wire, belt, tube, needle, hollow nano-assemblies or ower like morphologies for V 2 O 5 which depend upon the precursors used and synthesis procedures. [8][9][10][11][12][13][14][15][16][17] However there is no report so far on small V 2 O 5 particles catalyzed by ruthenium in detection of ammonia at room temperature which is an important task. Vanadium oxide is a well-known catalyst in reduction of NO x , NH 3 .…”