By a News Reporter-Staff News Editor at Life Science Weekly -- Researchers detail new data in Amino Acids. According to news reporting from Mexico City, Mexico, by NewsRx journalists, research stated, "Synthesis of high-purity BiFeO3 is very important for practical applications. This task has been very challenging for the scientific community because nonstoichiometric BixFeyOz species typically appear as byproducts in most of the synthesis routes."
The news correspondents obtained a quote from the research from the Mexican Institute of Petroleum, "In the present work, we outline the synthesis of BiFeO3 nanostructures by a combustion reaction, employing tartaric acid or glycine as promoter. When glycine is used, a porous BiFeO3 network composed of tightly assembled and sintered nanocrystallites is obtained. The origin of high purity BiFeO3 nanomaterial as well as the formation of other byproducts is explained on the basis of metal ligand interactions. Structural, morphological, and optical analysis of the intermediate that preceded the formation of porous BiFeO3 structures was accomplished. The thorough characterization of BiFeO3 nanoparticles (NPs) included powder X-ray diffraction (XRD); scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM); thermogravimetric analysis (TGA); UV-vis electronic absorption (diffuse reflectance mode), Raman scattering, Mossbauer, and electron paramagnetic resonance (EPR) spectroscopies; and vibrating sample magnetometry (VSM). The byproducts like beta-Bi2O3 and 5 nm Bi2Fe4O9 NPs were obtained when tartaric acid was the promoter. However, no such byproducts were formed using glycine in the synthesis process. The average sizes of the crystallites for BiFeO3 were 26 and 23 nm, for tartaric acid and glycine promoters, respectively. Two band gap energies, 2.27 and 1.66 eV, were found for BiFeO3 synthesized with tartaric acid, obtained from Tauc's plots. A remarkable selective enhancement in the intensity of the BiFeO3 A(1) mode, as a consequence of the resonance Raman effect, was observed and discussed for the first time in this work. For glycine-promoted BiFeO3 nanostructures, the measured magnetization (M) value at 20 000 Oe (0.64 emu g(-1)) was similar to 5 times lower than that obtained using tartaric acid."
According to the news reporters, the research concluded: "The difference between the M values has been associated with the different morphologies of the BiFeO3 nanostructures."
For more information on this research see: Easy Synthesis of High-Purity BiFeO3 Nanoparticles: New Insights Derived from the Structural, Optical, and Magnetic Characterization. Inorganic Chemistry, 2013;52(18):10306-10317. Inorganic Chemistry can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Inorganic Chemistry - www.pubs.acs.org/journal/inocaj)
Our news journalists report that additional information may be obtained by contacting J.L. Ortiz-Quinonez, Inst Mexicano Petr, Mexico City 077730, DF, Mexico. Additional authors for this research include D. Diaz, I. Zumeta-Dube, H. Arriola-Santamaria, I. Betancourt, P. Santiago-Jacinto and N. Nava-Etzana (see also Amino Acids).
Keywords for this news article include: Glycine, Mexico City, Amino Acids, Nanoparticle, Nanostructural, Nanostructures, Nanotechnology, Emerging Technologies, North and Central America
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