Hydrothermal Synthesis of Vanadium Oxides

1996 ◽  
Vol 453 ◽  
Author(s):  
Thomas Chirayil ◽  
Peter Zavalij ◽  
M. Stanley Whittingham
Keyword(s):  
Acetic Acid ◽  
Hydrothermal Synthesis ◽  
Critical Factor ◽  
Vanadium Oxides ◽  
Synthesis And Characterization ◽  
Cluster Compound ◽  
Soft Chemistry ◽  
Microwave Hydrothermal ◽  
Reaction Media

AbstractThe pH of the reaction media is a critical factor in the formation of new vanadium oxides with the tetramethylammonium (TMA) ion via the conventional hydrothermal method. New vanadium oxides; TMAV3O7, Li0.6V2−δO4−δ·H2O and Li0.6V2−δO4−δ, TMAV4O10, and two more new vanadium phases with d spacings of 11.5Å and 19.1Å are formed as the pH is varied with acetic acid. The synthesis and characterization of TMAV3O7, a new vanadium oxide with tetramethylammonium ions residing between its layers is discussed. The intercalation of alkylamines, DMSO, and water into Li0.6V2−δO4−δ·H2O is described. Microwave hydrothermal synthesis is a new and alternate soft chemistry technique used to accelerate the synthesis of TMAV4O10. This method also aided in the formation of a new cluster compound, [Li(H2O)4]2TMA(V10O28)·4H2O.

Microwave-hydrothermal synthesis and characterization of Co-VSB-5 microporous framework

2007 ◽  
Vol 15 (3) ◽  
pp. 271-276 ◽  
Author(s):  
Bharat L. Newalkar ◽  
T. Chiranjeevi ◽  
N. V. Choudary ◽  
S. Komarneni
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization ◽  
Microwave Hydrothermal

The Hydrothermal Synthesis and Characterization of New Organically Templated Layered Vanadium Oxides by Methylamine

1997 ◽  
Vol 497 ◽  
Author(s):  
Rongji Chen ◽  
Peter Y. Zavalij ◽  
M. Stanley Whittingham
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Synthesis ◽  
Lithium Batteries ◽  
Hydrothermal Reaction ◽  
Vanadium Oxides ◽  
Synthesis And Characterization ◽  
X Ray ◽  
Secondary Lithium Batteries ◽  
Initial Ph

ABSTRACTThe hydrothermal reaction of vanadium pentoxide with methylamine leads to a series of new layered vanadium oxides by using different acids to adjust the initial pH. The structure of these layered vanadium oxides was established by X-ray single crystal and powder diffraction. The new phases were also characterized by TGA and FTIR. The oxidation state of vanadium was determined. These materials are expected to exhibit catalytic activity and may be of interest as cathode materials for secondary lithium batteries.

scholarly journals Ultrafast microwave hydrothermal synthesis and characterization of Bi1−xLaxFeO3 micronized particles

2015 ◽  
Vol 162 ◽  
pp. 69-75 ◽  
Author(s):  
C. Ponzoni ◽  
M. Cannio ◽  
D.N. Boccaccini ◽  
C.R.H. Bahl ◽  
K. Agersted ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization ◽  
Microwave Hydrothermal

MICROWAVE HYDROTHERMAL SYNTHESIS AND CHARACTERIZATION OF Co3O4 NANOCRYSTALS

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2841-2846 ◽  
Author(s):  
GUOBIN MA ◽  
SHUNHUA ZHOU ◽  
SHISONG HUANG
Keyword(s):  
Aqueous Solution ◽  
Hydrothermal Synthesis ◽  
Hold Time ◽  
Synthesis And Characterization ◽  
High Quality ◽  
Hold Temperature ◽  
Microwave Hydrothermal ◽  
Microwave Hydrothermal Method ◽  
Incomplete Reaction

Microwave hydrothermal method is employed to synthesize Co 3 O 4 nanocrystals. Co ( OH )2 from reaction of C 4 H 6 CoO 4·4 H 2 O with NaOH aqueous solution is used as starting material. With a fixed hold time of an hour, the results show that high quality Co 3 O 4 nanocrystals can be synthesized at 200 °C. Decrease of the hold temperature leads to deteriorated crystallinity and incomplete reaction.

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