In the present paper, we study the results of the substitution of Mg2+ in Li4Ti5O12 anode materials with the chemical composition of Li4-xMgxTi5O12 with x = 0, 0.1 and 0.3. Spinel structured Li4-xMgxTi5O12 materials are prepared by conventional ceramic method. The structural, morphological, chemical compostion and vibrational studies of the prepared anode samples are systematically characterized by thermal analysis, XRD, SEM, EDS and FT-IR. Phase formation is confirmed by thermal analysis followed by the XRD and FT-IR spectroscopic results. The X-ray diffraction (XRD) technique exposed that the materials belonged to spinel type having the space group as Fd-3m. Synthesized samples are quite large upto 0.98 to 1.3 ?m in diameter and the grain size had a wide distribution range. EDS is used to identify the elements. The FT-IR spectra show tetrahedral and octahedral sites to be inhabited by the MO6 oxide lattice.
Growth of optically transparent single crystals of thiourea succinic acid (TUSA) was grown successfully from aqueous solution by slow evaporation technique. The crystal structure was elucidated using the single crystal XRD. The various functional groups and the modes of vibrations were identified by FT-IR spectroscopic analysis. The optical absorption studies indicate that the optical transparency window is quite wide making its suitable for NLO applications. Thermal stability of the crown crystal carried out by TGA-DTA analysis.
Abstract
Background
Environment-friendly fast and accurate mid-infrared spectroscopic methods have been developed for the quantitative analysis of doxorubicin hydrochloride (DOX) and arterolane maleate (ALM) in bulk and marketed formulations. Both transmittance and reflectance modes have been used for the analysis and a comparison has been drawn for better accuracy. The analytical methods were validated in accordance with International Council for Harmonisation (ICH) guidelines
Results
The proposed methods have been successfully developed and validated for the quantification of doxorubicin and arterolane maleate in solid bulk and dosage form. High recovery values in both the modes, while analysing DOX and ALM, indicated good accuracy of the methods. The methods showed excellent repeatability and intermediate precision [% RSD (Relative Standard Deviation < 2.0%]. The assay values of the drugs in solid dosage forms were also found close to the labelled claim.
Conclusion
The proposed Fourier transform infrared (FT-IR) spectroscopic methods were found to be specific, reproducible, valid and could be used as general methods for the quantification of most of the solid drug preparations such as tablets, capsules and powders.
Zn2SiO4:Eu3+, Dy3+ phosphors have been prepared through the sol-gel process. X-ray diffraction (XRD), thermogravimetric and ddifferential thermal analysis (TG-DTA), FT-IR spectra and photoluminescence spectra were used to characterize the resulting phosphors. The results of XRD indicated that the phosphors crystallized completely at 1000oC. In Zn2SiO4:Eu3+,Dy3+ phosphors, the Eu3+ and Dy3+ show their characteristic red(613nm, 5D0-7F2), blue (481nm, 4F9/2–6H15/2) and yellow (577nm, 4F9/2–6H13/2) emissions.
STRUCTURAL, MORPHOLOGICAL AND VIBRATIONAL STUDIES OF MAGNESIUM DOPED LITHIUM TITANATE ANODE MATERIALS FOR LI-ION BATTERIES