scholarly journals Room temperature decomposition of dimethyl methylphosphonate on cuprous oxide yields atomic phosphorus

2019 ◽  
Vol 680 ◽  
pp. 75-87 ◽  
Author(s):  
Lena Trotochaud ◽  
Ashley R. Head ◽  
Christin Büchner ◽  
Yi Yu ◽  
Osman Karslıoğlu ◽  
...  
Keyword(s):  
Cuprous Oxide ◽  
Room Temperature ◽  
Dimethyl Methylphosphonate ◽  
Temperature Decomposition

Sustained Room Temperature Decomposition of Dimethyl Methylphosphonate (DMMP) by O3 on Alumina-Supported MnOx

2011 ◽  
Vol 115 (23) ◽  
pp. 11514-11524 ◽  
Author(s):  
Mark B. Mitchell ◽  
Viktor N. Sheinker ◽  
Woodrow W. Cox ◽  
Kenneth Hardcastle
Keyword(s):  
Room Temperature ◽  
Dimethyl Methylphosphonate ◽  
Temperature Decomposition

Characterization of intergranular cuprous oxide in polycrystalline YBa2Cu3O7-x

1988 ◽  
Vol 46 ◽  
pp. 880-881
Author(s):  
Bradley L. Thiel ◽  
Chan Han R. P. ◽  
Kurosky L. C. Hutter ◽  
I. A. Aksay ◽  
Mehmet Sarikaya
Keyword(s):  
Grain Boundary ◽  
Cuprous Oxide ◽  
Room Temperature ◽  
Boundary Phase ◽  
Spectroscopic Techniques ◽  
Transition Width ◽  
Practical Applications ◽  
Thin Foils ◽  
Superconducting Oxides

The identification of extraneous phases is important in understanding of high Tc superconducting oxides. The spectroscopic techniques commonly used in determining the origin of superconductivity (such as RAMAN, XPS, AES, and EXAFS) are surface-sensitive. Hence a grain boundary phase several nanometers thick could produce irrelevant spectroscopic results and cause erroneous conclusions. The intergranular phases present a major technological consideration for practical applications. In this communication we report the identification of a Cu2O grain boundary phase which forms during the sintering of YBa2Cu3O7-x (1:2:3 compound).Samples are prepared using a mixture of Y2O3. CuO, and BaO2 powders dispersed in ethanol for complete mixing. The pellets pressed at 20,000 psi are heated to 950°C at a rate of 5°C per min, held for 1 hr, and cooled at 1°C per min to room temperature. The samples show a Tc of 91K with a transition width of 2K. In order to prevent damage, a low temperature stage is used in milling to prepare thin foils which are then observed, using a liquid nitrogen holder, in a Philips 430T at 300 kV.

Decomposition of Dimethyl Methylphosphonate (DMMP) on Supported Cerium and Iron Co-Impregnated Oxides at Room Temperature

2003 ◽  
Vol 107 (2) ◽  
pp. 580-586 ◽  
Author(s):  
Mark B. Mitchell ◽  
Viktor N. Sheinker ◽  
Aron B. Tesfamichael ◽  
Enid N. Gatimu ◽  
Maya Nunley
Keyword(s):  
Room Temperature ◽  
Dimethyl Methylphosphonate

Enhanced dimethyl methylphosphonate detection based on two-dimensional WSe2 nanosheets at room temperature

The Analyst ◽  
2020 ◽  
Vol 145 (24) ◽  
pp. 8059-8067
Author(s):  
Bolong Li ◽  
Xinwei Chen ◽  
Chen Su ◽  
Yutong Han ◽  
Huaizhang Wang ◽  
...  
Keyword(s):  
Gas Sensor ◽  
High Performance ◽  
Room Temperature ◽  
Two Dimensional ◽  
Dimethyl Methylphosphonate

A high performance gas sensor based on two-dimensional WSe2 nanosheets was fabricated for dimethyl methylphosphonate detection at room-temperature.

Anomaly of Nuclear Quadrupole Relaxation in Cu2O Prepared at Low Temperatures

1986 ◽  
Vol 41 (1-2) ◽  
pp. 382-385 ◽  
Author(s):  
J. Kasprzak ◽  
J. Lus ◽  
J. Pietrzak
Keyword(s):  
Temperature Dependence ◽  
Cuprous Oxide ◽  
Thermal Processing ◽  
Low Temperatures ◽  
Room Temperature ◽  
Quadrupole Relaxation ◽  
Temperature Dependences ◽  
Powder Samples ◽  
Nuclear Quadrupole ◽  
Nuclear Quadrupole Relaxation

The 63Cu and 65Cu NQR transitions in powder samples of cuprous oxide have been investigated from 77 to 500 K and at room temperature after annealing up to 1100 K Significant differences in T1 , NQR linewidth Δv, and their temperature dependences were found among the samples prepared in different ways. For C u20 samples obtained in low temperatures (below 380 K), the temperature dependence of T1 below 380 K is o f activation character with Ea = 0.07 eV. These results are interpreted in terms of an electron hopping mechanism. Thermal processing of these samples permits to obtain irreversible electronic state and then the spectroscopic parameters are the same as for the samples obtained in high temperatures (above 1320 K).

scholarly journals Shape-oriented photodynamic therapy of cuprous oxide (Cu2O) nanocrystals for cancer treatment

RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23607-23614 ◽  
Author(s):  
Mukesh Lavkush Bhaisare ◽  
M. Shahnawaz Khan ◽  
Sunil Pandey ◽  
Gangaraju Gedda ◽  
Hui-Fen Wu
Keyword(s):  
Photodynamic Therapy ◽  
Cancer Treatment ◽  
Cuprous Oxide ◽  
Room Temperature ◽  
Reducing Agent ◽  
Novel Synthesis

We demonstrated a novel synthesis of cuprous oxide nanocrystals at room temperature by varying the concentration of the reducing agent. The nanocrystals were applied for photodynamic therapy to treat cancer.

Photoactivation of silver loaded on titanium(IV) oxide for room-temperature decomposition of ozone

1993 ◽  
Vol 71 (2) ◽  
pp. 195-198 ◽  
Author(s):  
B. Ohtani ◽  
S.-W. Zhang ◽  
T. Ogita ◽  
S. Nishimoto ◽  
T. Kagiya
Keyword(s):  
Room Temperature ◽  
Temperature Decomposition

scholarly journals Formation of metastable calcite-type barium carbonate during low-temperature decomposition of (Ba,Ti)-precursor complexes

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Room Temperature ◽  
Barium Carbonate ◽  
Intermediate Formation ◽  
Partial Substitution ◽  
Structural Domains ◽  
Temperature Decomposition ◽  
Xrd Phase Analysis ◽  
Ir Analysis ◽  
Intergrowth Structures ◽  
Perovskite Type

(Ba,Ti)-precursor complexes, important for the production of advanced BaTiO3 perovskite-type materials, undergo structural transformations and complex reactions during their thermal decomposition. Based on XRD phase analysis, combined with Rietveld refinement of crystal structure data, and on IR analysis, the intermediate formation of calcite-type BaCO3 is evidenced, which can be explained by the stabilization of this metastable modification in the form of an oxycarbonate phase down to room temperature. Two possible processes, leading to such an oxycarbonate, are discussed: (i) partial substitution of CO32− by O2− in the anionic sublattice, and (ii) topotaxial formation of calcite-type structural domains of BaCO3 by templating with oxygen-deficient titanates, resulting in the oxide–carbonate intergrowth structures.

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