Surfactant-mediated low-temperature synthesis of phase pure multiply twinned copper nanoparticles under non-inert condition via thermal decomposition of copper malonate

2013 ◽  
Vol 94 ◽  
pp. 108-111 ◽  
Author(s):  
Chira R. Bhattacharjee ◽  
Debraj Dhar Purkayastha ◽  
Nirmalendu Das
2010 ◽  
Vol 2010 (9) ◽  
pp. 1343-1347 ◽  
Author(s):  
Duk Kyu Lee ◽  
In-Sun Cho ◽  
SangWook Lee ◽  
Dong Hoe Kim ◽  
Hyun-Woo Shim ◽  
...  

2020 ◽  
Vol 59 (6) ◽  
pp. 3428-3436 ◽  
Author(s):  
Manuel Loor ◽  
Sarah Salloum ◽  
Patrick Kawulok ◽  
Sepideh Izadi ◽  
Georg Bendt ◽  
...  

2011 ◽  
Vol 14 ◽  
pp. 105-111 ◽  
Author(s):  
Teobaldo Mariño Otero ◽  
Yodalgis Mosqueda Laffita ◽  
Carlos Ricardo Milian Pila ◽  
Eduardo Pérez Cappe

In this work, the synthesis of Li3xLa2/3-xTiO3 oxide is studied by thermal decomposition of citrate precursor at very low temperature which has not been yet reported in the literature for these compounds. The characterization of oxides and its precursor was realized by DRX, IR, ATD and TEM techniques. The results show the formation of a new chemical compound (precursor) as well as several advantages of the citrate method in relation to reported ones in the literature: the ostensible decreasing of temperature Li3xLa2/3-xTiO3 formation and the decreasing of particle size on the nanometric scale which is very desirable for the electrochemical application.


2018 ◽  
Vol 5 (5) ◽  
pp. 1033-1044 ◽  
Author(s):  
T. Wesley Surta ◽  
Alicia Manjón-Sanz ◽  
Eric Qian ◽  
T. Thao Tran ◽  
Michelle R. Dolgos

First report of the phase pure synthesis and crystal structure determination for Bi0.5A0.5(Sc0.5Ta0.5)O3 (A = K+, Na+).


2016 ◽  
Vol 185 ◽  
pp. 131-134 ◽  
Author(s):  
Weiqi Leng ◽  
H. Michael Barnes ◽  
Qiangu Yan ◽  
Zhiyong Cai ◽  
Jilei Zhang

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 444 ◽  
Author(s):  
Günther J. Redhammer ◽  
Julian Weber ◽  
Gerold Tippelt ◽  
Gregor A. Zickler ◽  
Andreas Reyer

Using a low temperature synthesis protocol, it was possible to obtain phase-pure synthetic aegirine (NaFeSi2O6) at temperatures as low as 130 °C, albeit only with rather long synthesis times of ~200 h; at 155 °C, a nano-crystallite shaped phase-pure material is formed after 24 h. These are, to the best of our knowledge, the lowest temperatures reported so far for phase-pure aegirine synthesis. Powder X-ray diffraction (PXRD) was used to characterize phase purity, structural state and microstructural properties (size and strain) of the as-synthesized (130–230 °C) and heat treated (300–900 °C) samples, via Rietveld analysis of powder patterns. Melting was observed at 999 °C. With increasing synthesis temperature, crystallite size linearly increased from 10 nm to 30 nm at 230 °C, while unit cell parameters decreased. The microstrain was very small. Additional heat treatment of as synthesized samples showed that the crystallite size remained rather unaffected up to 700 °C. The lattice parameters, however, already changed at low temperatures and successively became smaller, indicating increasing ordering towards more regular arrangements of building units. This was confirmed by 57Fe Mössbauer spectroscopy, where a distinct decrease of the quadrupole splitting with increasing synthesis temperature was found. Finally, Raman spectroscopy showed that some weakly-developed pre-ordering effects were present in the samples, which appeared to be amorphous in PXRD, while well-resolved spectra appeared as soon as the long-range ordered crystalline state could be found with X-ray diffraction.


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