Sodium vanadium oxide Na2V6O16·3H2O nanobelts and nanorings: A new room-temperature ferromagnetic semiconductor

2012 ◽  
Vol 22 (6) ◽  
pp. 2560-2565 ◽  
Author(s):  
Yan Xue ◽  
Xiaodong Zhang ◽  
Jiajia Zhang ◽  
Jian Wu ◽  
Yongfu Sun ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Room Temperature ◽  
Ferromagnetic Semiconductor

ChemInform Abstract: Synthetic Potassium Vanadium Oxide K2V6O16·1.5H2O Superlong Nanobelts: A 1D Room-Temperature Ferromagnetic Semiconductor.

ChemInform ◽  
2013 ◽  
Vol 44 (49) ◽  
pp. no-no
Author(s):  
Liangfei Bai ◽  
Yan Xue ◽  
Jiajia Zhang ◽  
Bicai Pan ◽  
Changzheng Wu
Keyword(s):  
Vanadium Oxide ◽  
Room Temperature ◽  
Ferromagnetic Semiconductor

Synthetic Potassium Vanadium Oxide K2V6O16·1.5H2O Superlong Nanobelts: A 1D Room-Temperature Ferromagnetic Semiconductor

2013 ◽  
Vol 2013 (20) ◽  
pp. 3497-3505 ◽  
Author(s):  
Liangfei Bai ◽  
Yan Xue ◽  
Jiajia Zhang ◽  
Bicai Pan ◽  
Changzheng Wu
Keyword(s):  
Vanadium Oxide ◽  
Room Temperature ◽  
Ferromagnetic Semiconductor

scholarly journals The magnetic and structure properties of room-temperature ferromagnetic semiconductor (Ga,Mn)N

2004 ◽  
Vol 262 (1-4) ◽  
pp. 287-289 ◽  
Author(s):  
Fuqiang Zhang ◽  
NuoFu Chen ◽  
Xianglin Liu ◽  
Zhikai Liu ◽  
Shaoyan Yang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Ferromagnetic Semiconductor ◽  
Structure Properties

scholarly journals Self-Assembled Vanadium Oxide Nanoflakes for p-Type Ammonia Sensors at Room Temperature

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 317 ◽  
Author(s):  
Haihong Yin ◽  
Changqing Song ◽  
Zhiliang Wang ◽  
Haibao Shao ◽  
Yi Li ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Electron Microscopies ◽  
Ammonia Sensing ◽  
Transmission Electron ◽  
Order Of Magnitude ◽  
Self Assembled ◽  
Ammonia Sensors ◽  
P Type

VO2(B), VO2(M), and V2O5 are the most famous compounds in the vanadium oxide family. Here, their gas-sensing properties were investigated and compared. VO2(B) nanoflakes were first self-assembled via a hydrothermal method, and then VO2(M) and V2O5 nanoflakes were obtained after a heat-phase transformation in nitrogen and air, respectively. Their microstructures were evaluated using X-ray diffraction and scanning and transmission electron microscopies, respectively. Gas sensing measurements indicated that VO2(M) nanoflakes were gas-insensitive, while both VO2(B) and V2O5 nanoflakes were highly selective to ammonia at room temperature. As ammonia sensors, both VO2(B) and V2O5 nanoflakes showed abnormal p-type sensing characteristics, although vanadium oxides are generally considered as n-type semiconductors. Moreover, V2O5 nanoflakes exhibited superior ammonia sensing performance compared to VO2(B) nanoflakes, with one order of magnitude higher sensitivity, a shorter response time of 14–22 s, and a shorter recovery time of 14–20 s. These characteristics showed the excellent potential of V2O5 nanostructures as ammonia sensors.

DC Magnetron Sputtering Deposition of Room-Temperature Phase Transition Vanadium Oxide Film

2014 ◽  
Vol 1053 ◽  
pp. 332-336 ◽  
Author(s):  
Ya Qiao ◽  
Yuan Lu ◽  
Hua Yang ◽  
Yong Shun Ling
Keyword(s):  
Thin Film ◽  
Phase Transition ◽  
Magnetron Sputtering ◽  
Vanadium Oxide ◽  
Room Temperature ◽  
Annealed Film ◽  
Oxide Thin Film ◽  
Temperature Phase ◽  
Dc Magnetron Sputtering ◽  
Main Component

Low valence vanadium oxide thin film was deposited on ordinary glass substrates by direct current (DC) magnetron sputtering from a vanadium metal target. And then it was annealed in an atmosphere of oxygen/argon mixture at the temperature of 450°C for 2hours to obtain VO2thin film possessing the ability of phase transition. The XRD patterns and resistance-temperature (R-T) curves of the film before and after the annealing were given. The results show that: the as-deposited film, whose main component is V2O3, presents no phase transition and its resistance changes from 1.26 kΩ~1.01kΩ while its temperature rising from room temperature to 80°C; the annealed film, whose main component is VO2, presents a phase transition when its temperature rising from room temperature to 80°C and its resistance changes from 10kΩ to 60Ω, more than two orders. And the phase transition temperature of the film deposited is only 30°C.

Room temperature conversion of X0.3V2O5· nH2O phase into X2V6O16· nH2O phase Influence of the nature of the cation X+

2004 ◽  
Vol 848 ◽  
Author(s):  
Olivier Durupthy ◽  
Saïd Es-salhi ◽  
Nathalie Steunou ◽  
Thibaud Coradin ◽  
Jacques Livage
Keyword(s):  
Vanadium Oxide ◽  
Room Temperature ◽  
Interlayer Space ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxide Phases ◽  
New Phase ◽  
Supernatant Solution ◽  
Scanning Electron

ABSTRACTVarious cations (Li+, Na+, K+, NH4+, Cs+, Mg2+, Ca2+, Ba2+) were introduced during the formation of a V2O5. nH2O gel. Cation intercalated Xy V2O5. nH2O (y = 0.3 for X = Li+, Na+, K+, NH4+ or y = 0.15 for Mg2+, Ca2+, Ba2+) were first obtained at room temperature but some of them evolve upon ageing into a new phase: XV3O8. nH2O for X = Na+, K+, NH4+ and Cs+ or XV6O16. nH2O for X = Mg2+, Ca2+, Ba2+. All the vanadium oxide phases were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and infrared spectroscopy (IR); the supernatant solutions were analysed by 51V NMR spectroscopy. These vanadium oxide phases exhibit a layered structure with cations and water molecules intercalated within the interlayer space. The formation of the different phases depends mainly on the pH of the supernatant solution and on the nature of the cation.

Role of oxygen vacancies in vanadium oxide and oxygen functional groups in graphene oxide for room temperature CO2 gas sensors

2019 ◽  
Vol 294 ◽  
pp. 17-24 ◽  
Author(s):  
Shrouk E. Zaki ◽  
Mohamed A. Basyooni ◽  
Mohamed Shaban ◽  
Mohamed Rabia ◽  
Yasin Ramazan Eker ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Vanadium Oxide ◽  
Functional Groups ◽  
Gas Sensors ◽  
Room Temperature ◽  
Oxygen Vacancies ◽  
Co2 Gas ◽  
Oxygen Functional Groups

Vanadium Oxide Complexes in Room-Temperature Chloroaluminate Molten Salts

1999 ◽  
Vol 38 (25) ◽  
pp. 5709-5715 ◽  
Author(s):  
R. C. Bell ◽  
A. W. Castleman ◽  
D. L. Thorn
Keyword(s):  
Vanadium Oxide ◽  
Molten Salts ◽  
Room Temperature

Room Temperature Methane (CH4) Sensing by Vanadium Oxide (VOx) Nanoparticles

2016 ◽  
Vol 22 (4) ◽  
pp. 901-904 ◽  
Author(s):  
A. A Akande ◽  
K. E Rammutla ◽  
B. P Dhonge ◽  
A. G. J Machatine ◽  
B. W Mwakikunga
Keyword(s):  
Vanadium Oxide ◽  
Room Temperature
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