scholarly journals Insights in the Application of Stoichiometric and Non-Stoichiometric Titanium Oxides for the Design of Sensors for the Determination of Gases and VOCs (TiO2−x and TinO2n−1 vs. TiO2)

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6833 ◽  
Author(s):  
Simonas Ramanavicius ◽  
Arunas Ramanavicius
Keyword(s):  
Titanium Oxide ◽  
Synthesis Methods ◽  
Titanium Oxides ◽  
Self Heating ◽  
Nano Structures ◽  
Volatile Organic ◽  
Sensitivity And Selectivity ◽  
Magnéli Phase ◽  
Magneli Phase

In this review article, attention is paid towards the formation of various nanostructured stoichiometric titanium dioxide (TiO2), non-stoichiometric titanium oxide (TiO2−x) and Magnéli phase (TinO2n−1)-based layers, which are suitable for the application in gas and volatile organic compound (VOC) sensors. Some aspects related to variation of sensitivity and selectivity of titanium oxide-based sensors are critically overviewed and discussed. The most promising titanium oxide-based hetero- and nano-structures are outlined. Recent research and many recently available reviews on TiO2-based sensors and some TiO2 synthesis methods are discussed. Some promising directions for the development of TiO2-based sensors, especially those that are capable to operate at relatively low temperatures, are outlined. The applicability of non-stoichiometric titanium oxides in the development of gas and VOC sensors is foreseen and transitions between various titanium oxide states are discussed. The presence of non-stoichiometric titanium oxide and Magnéli phase (TinO2n−1)-based layers in ‘self-heating’ sensors is predicted, and the advantages and limitations of ‘self-heating’ gas and VOC sensors, based on TiO2 and TiO2−x/TiO2 heterostructures, are discussed.

Reduction in the Thermal Conductivity of Thermoelectric Titanium Oxide by Introduction of Planar Defects

2009 ◽  
Vol 1218 ◽  
Author(s):  
Shunta Harada ◽  
Katsushi Tanaka ◽  
Haruyuki Inui
Keyword(s):  
Thermal Conductivity ◽  
Titanium Oxide ◽  
Hot Pressing ◽  
Oxygen Deficiency ◽  
Nominal Composition ◽  
Titanium Oxides ◽  
X Ray Diffraction ◽  
Planar Defects ◽  
Magnéli Phase ◽  
Magneli Phase

AbstractThermoelectric properties of a homologous series of Magnéli phase titanium oxides TinO2n-1 (n = 2, 3..) have been investigated. Dense polycrystalline specimens with nominal composition of TiO2-x (x = 0.10, 0.20) have been prepared by conventional hot-pressing. X-ray diffraction analysis has revealed that prepared specimens are slightly reduced during hot-pressing. Electrical conduction is of n-type for all prepared titanium oxides and electrical resistivity and absolute values of Seebeck coefficient decrease with increasing oxygen deficiency. The carrier concentration of Magnéli phase titanium oxide increases with increasing oxygen deficiency. Lattice thermal conductivity decreases with increasing oxygen deficiency by more than 60% at room temperature and 40% at 773K compared to TiO2, which can be due to the presence of dense planar defects. The largest thermoelectric figure of merit Z, 1.6×10-4 K-1 at 773K, was obtained in TiO1.90 hot pressed specimen.

MnCo2O4 decorated Magnéli phase titanium oxide as a carbon-free cathode for Li–O2 batteries

2017 ◽  
Vol 5 (37) ◽  
pp. 19991-19996 ◽  
Author(s):  
Xuecheng Cao ◽  
Zhihui Sun ◽  
Xiangjun Zheng ◽  
Jinghua Tian ◽  
Chao Jin ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Electrocatalytic Activity ◽  
High Performance ◽  
Electronic Conductivity ◽  
Synergistic Interaction ◽  
High Electronic Conductivity ◽  
Magnéli Phase ◽  
First Time ◽  
Magneli Phase

The application of MnCo2O4 (MCO) decorated Ti4O7 as a carbon-free cathode for Li–O2 batteries is reported for the first time. The high performance of Ti4O7/MCO cathode is attributed to the high electronic conductivity of Ti4O7, the high electrocatalytic activity of MCO and the synergistic interaction between Ti4O7 and MCO toward ORR and OER.

Platinum–titanium alloy catalysts on a Magnéli-phase titanium oxide support for improved durability in Polymer Electrolyte Fuel Cells

2013 ◽  
Vol 223 ◽  
pp. 183-189 ◽  
Author(s):  
Tsutomu Ioroi ◽  
Tomoki Akita ◽  
Masafumi Asahi ◽  
Shin-ichi Yamazaki ◽  
Zyun Siroma ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Titanium Oxide ◽  
Polymer Electrolyte Fuel Cells ◽  
Oxide Support ◽  
Magnéli Phase ◽  
Alloy Catalysts ◽  
Magneli Phase

Magneli Phase Titanium Oxide: Electrochemical Routes and Characterisation

2014 ◽  
Vol 61 (4) ◽  
pp. 393-404 ◽  
Author(s):  
P. Dunne ◽  
M. Mieszala ◽  
V. Le Nader ◽  
L. Philippe ◽  
J. Michler
Keyword(s):  
Titanium Oxide ◽  
Magnéli Phase ◽  
Magneli Phase

The Thermal-Oxidation Behavior of Pristine and Doped Magnéli Phase Titanium Oxides

2020 ◽  
Vol 98 (1) ◽  
pp. 11-22
Author(s):  
Joseph T. English ◽  
David P. Wilkinson
Keyword(s):  
Thermal Oxidation ◽  
Oxidation Behavior ◽  
Titanium Oxides ◽  
Magnéli Phase ◽  
Magneli Phase

The Thermal-Oxidation Behavior of Pristine and Doped Magnéli Phase Titanium Oxides

2020 ◽  
Vol MA2020-02 (9) ◽  
pp. 1179-1179
Author(s):  
Joseph English ◽  
David P. Wilkinson
Keyword(s):  
Thermal Oxidation ◽  
Oxidation Behavior ◽  
Titanium Oxides ◽  
Magnéli Phase ◽  
Magneli Phase

X-Ray Spectrographic Determination of Tantalum, Columbium, Iron, and Titanium Oxide Mixtures Using Simple Arithmetic Corrections for Inter element Effects

1957 ◽  
Vol 1 ◽  
pp. 253-270
Author(s):  
Betty J. Mitchell
Keyword(s):  
Titanium Oxide ◽  
Titanium Oxides ◽  
Simple Arithmetic ◽  
Spectrographic Determination ◽  
Fluorescent Intensity ◽  
X Ray ◽  
Sample Matrix ◽  
Time Required ◽  
Analytical Time

AbstractA method of specific arithmetic corrections for absorption and enhancement interelement effects has been developed, with particular reference to the quantitative determination of mixtures of tantalum, columbium, iron, and titanium oxides. The combined oxides of these elements are prepared chemically from liquid, powder, or metallic samples; weight percantages are determined by reference to calibration and intensity correction curves relating fluorescent intensity to concentration and sample matrix. Tantalum, columbium, iron, or titanium oxide from 0.01 to 100% concentration can be determined with a reproducibility of 1% of the amount present at the 50% concentration and 10% of the amount present at the 1 or 0, 1% level. X-ray analytical time required averages less than 10 minutes per determination. The corrections which have been established are universally applicable to combinations of these four oxides which may be obtained by chemical treatment from such materials as columbite or tantalite ores, tantalum or columbium metalSj and titanium alloys. The method of arithmetic corrections for interelement effects is general in nature and may be applied to the determination of other elements in complex matrices.

scholarly journals Magnéli Phase Titanium Oxide as a Novel Anode Material for Potassium-Ion Batteries

ACS Omega ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 5304-5309 ◽  
Author(s):  
Geon-Woo Lee ◽  
Byung Hoon Park ◽  
Masoud Nazarian-Samani ◽  
Young Hwan Kim ◽  
Kwang Chul Roh ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Anode Material ◽  
Potassium Ion ◽  
Magnéli Phase ◽  
Magneli Phase
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