A facile microwave-induced synthesis of titanium pyrophosphate nanocrystals

2012 ◽  
Vol 83 ◽  
pp. 130-132 ◽  
Author(s):  
Rui Wang ◽  
Junwei Ye ◽  
Guiling Ning ◽  
Heng Jiang ◽  
Weilei Zhou ◽  
...  
Keyword(s):  
Titanium Pyrophosphate

Controllably Enriched Oxygen Vacancies through Polymer Assistance in Titanium Pyrophosphate as a Super Anode for Na/K-Ion Batteries

ACS Nano ◽  
2019 ◽  
Vol 13 (8) ◽  
pp. 9227-9236 ◽  
Author(s):  
Zhongtao Li ◽  
Yunfa Dong ◽  
Jianze Feng ◽  
Tao Xu ◽  
Hao Ren ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Titanium Pyrophosphate

Improvement of High-Temperature Oxidation of Titanium Alloys by Dipping in a Phosphoric Acid Solution

2008 ◽  
Vol 595-598 ◽  
pp. 17-22 ◽  
Author(s):  
S.Y. Brou ◽  
G. Bonnet ◽  
Jean Luc Grosseau-Poussard
Keyword(s):  
High Temperature ◽  
Phosphoric Acid ◽  
High Temperature Oxidation ◽  
Isothermal Oxidation ◽  
Superficial Layer ◽  
Phosphoric Acid Solution ◽  
Acid Solutions ◽  
Heating Period ◽  
Temperature Oxidation ◽  
Titanium Pyrophosphate

Gamma-TiAl samples were treated by phosphoric acid solutions at different concentrations. With 15 mol/dm3, a viscous deposit was left on the surface leading, after drying and high temperature oxidation, to a very heterogeneous surface aspect. Concentrations below 0.5 mol/dm3 were then used and allowed to greatly ameliorate the homogeneity of the superficial layer. After heating from ambient to oxidation temperature, however, cracks were always observed, due to the departure of gaseous molecules. Isothermal oxidation tests come out at 800°C and 900°C under reconstituted air showed that weight gains were strongly reduced when TiAl had been treated. A compound containing titanium, oxygen and phosphorus was detected at the end of the heating period, identified as titanium pyrophosphate, TiP2O7. This compound remained the only one detected for 100 h when oxidation was come out at 800°C, but evolved towards TiO2 when oxidation time was increased. In the case of oxidation at 900°C, the evolution from TiP2O7 to TiO2 also happened but appeared to go faster.

scholarly journals Oxidative dehydrogenation of isobutane over titanium pyrophosphate catalyst

2005 ◽  
Vol 70 (6) ◽  
pp. 791-798 ◽  
Author(s):  
Ioan-Cezar Marcu ◽  
Jean Millet ◽  
Ioan Sandulescu
Keyword(s):  
Activation Energy ◽  
Apparent Activation Energy ◽  
Oxidative Dehydrogenation ◽  
Reaction Temperature ◽  
Reaction Mechanisms ◽  
Catalytic Properties ◽  
Product Distribution ◽  
Activation Pathways ◽  
Titanium Pyrophosphate ◽  
Oxidative Dehydrogenation Of Isobutane

The catalytic properties of titanium pyrophosphate in the oxidative dehydrogenation of isobutane to isobutylene were investigated in the 400 ? 550 ?C temperature range. Asignificant change of the product distribution and of the apparent activation energy of the reaction was observed at about 490 ?C. This phenomenon, already observed in the oxidative dehydrogenation of n-butane, has been interpreted by the existence of two reaction mechanisms depending upon the reaction temperature. Comparison with the n-butane reaction allowed different activation pathways for the activation of alkanes to be proposed. The catalytic properties of TiP2O7 in the oxidative dehydrogenation of isobutane was also compared to those obtained previously with several other pyrophosphates and TiP2O7 was found to be less active and selective for this reaction.

High-pressure studies of titanium pyrophosphate by Raman scattering and infrared spectroscopy

2003 ◽  
Vol 337 (1-4) ◽  
pp. 221-229 ◽  
Author(s):  
K.E. Lipinska-Kalita ◽  
M.B. Kruger ◽  
S. Carlson ◽  
A.M.Krogh Andersen
Keyword(s):  
High Pressure ◽  
Infrared Spectroscopy ◽  
Raman Scattering ◽  
High Pressure Studies ◽  
Titanium Pyrophosphate

Incorporation of titanium pyrophosphate in polybenzimidazole membrane for medium temperature dry PEFC application

2020 ◽  
Vol 344 ◽  
pp. 115140 ◽  
Author(s):  
Yve Xian Ooi ◽  
Kyaw Zay Ya ◽  
Keiichiro Maegawa ◽  
Wai Kian Tan ◽  
Go Kawamura ◽  
...  
Keyword(s):  
Medium Temperature ◽  
Titanium Pyrophosphate

scholarly journals Titanium Pyrophosphate for Removal of Trivalent Heavy Metals and Actinides Simulated by Retention of Europium

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Huemantzin Balan Ortiz-Oliveros ◽  
Rosa María Flores-Espinosa ◽  
Eduardo Ordoñez-Regil ◽  
Suilma Marisela Fernández-Valverde
Keyword(s):  
Heavy Metals ◽  
Surface Roughness ◽  
Kinetic Constant ◽  
Surface Acidity ◽  
Sorption Process ◽  
Sorption Kinetics ◽  
Acidity Constants ◽  
Maximum Sorption Capacity ◽  
Maximum Sorption ◽  
Titanium Pyrophosphate

This work addresses the synthesis of titanium pyrophosphate, as well as the characterization and evaluation of the sorption process of europium, for removal of trivalent heavy metals and actinides simulate. The evaluation of the surface properties of titanium pyrophosphate was carried out determining the surface roughness and surface acidity constants. The values obtained from the determination of the surface roughness of the synthesized solid indicate that the surface of the material presents itself as slightly smooth. The FITEQL program was used to fit the experimental titration curves to obtain the surface acidity constants: log⁡K+=3.59±0.06 and log⁡K-=-3.90±0.05. The results of sorption kinetics evidenced that the pseudo-order model explains the retention process of europium, in which the initial sorption velocity was 8.3 × 10−4 mg g−1 min−1 and kinetic constant was 1.8 × 10−3 g mg min−1. The maximum sorption capacity was 0.6 mg g−1. The results obtained from sorption edge showed the existence of two bidentate complexes on the surface.

Insights into the photosensitization activity of zirconium-titanium pyrophosphate under visible light irradiation

2020 ◽  
Vol 268 ◽  
pp. 127399 ◽  
Author(s):  
Chengcheng Li ◽  
Qingyu Han ◽  
Yufu Pan ◽  
Jingyu Zhao ◽  
Yanfang Luo ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Titanium Pyrophosphate
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