scholarly journals MINERALOGICAL CHARACTERIZATION STUDIES ON UNBURNT CERAMIC PRODUCT MADE FROM ROCK RESIDUE ADDITIVES BY FT-IR SPECTROSCOPIC TECHNIQUE

2013 ◽  
Vol 22 ◽  
pp. 62-70 ◽  
Author(s):  
R. VIJAYARAGAVAN ◽  
S. MULLAINATHAN ◽  
M. BALACHANDRAMOHAN ◽  
N. KRISHNAMOORTHY ◽  
S. NITHIYANANTHAM ◽  
...  
Keyword(s):  
Qualitative Analysis ◽  
Functional Groups ◽  
Spectroscopic Technique ◽  
Ceramic Product ◽  
Minor Constituent ◽  
Mineralogical Characterization ◽  
Ceramic Samples ◽  
Ft Ir ◽  
Characterization Studies ◽  
Ir Spectroscopic

The usability of waste rock (rock residue) powder as an additive material in ceramic samples was investigated. Qualitative analysis was carried out to determine the major and minor constituent minerals present in ceramic bodies made from rock residue powder by using FT-IR spectroscopic technique. Further, the representative ceramic bodies are analyzed by FT-IR technique to yield more information about the functional groups and also to estimate the order or disorder of kaolinite structure.

scholarly journals Mineralogical Characterization Studies of Ancient Potteries of Tamilnadu, India by FT-IR Spectroscopic Technique

2010 ◽  
Vol 7 (s1) ◽  
pp. S185-S190 ◽  
Author(s):  
R. Ravisankar ◽  
S. Kiruba ◽  
P. Eswaran ◽  
G. Senthilkumar ◽  
A. Chandrasekaran
Keyword(s):  
Spectroscopic Technique ◽  
Ir Absorption ◽  
Minor Constituent ◽  
Absorption Bands ◽  
Mineralogical Characterization ◽  
Band Position ◽  
Ft Ir ◽  
Characterization Studies ◽  
Ir Spectroscopic ◽  
Qualitative Analyses

We report the spectroscopic investigation of ancient potteries excavated in Tamilnadu. Qualitative analyses were carried out to determine the major and minor constituent minerals present in the samples from the band position or location of the peaks. From the prominent IR absorption peaks, the minerals were identified with the available literature are the quartz, orthoclase, albite, magnetite, hematite, kaolinite, montmorillonite, illite, gypsum and calcite. The interpretation of results is made from the IR characteristics absorption bands. Spectroscopic results indicates that these potteries were refried to a less than 900°C.

Identification of Large Isotope Anomalies in Quartz by Infrared Spectroscopy

2019 ◽  
Vol 73 (7) ◽  
pp. 767-773
Author(s):  
Ryan C. Ogliore ◽  
Cosette Dwyer ◽  
Michael J. Krawczynski ◽  
Hélène Couvy ◽  
Max Eisele ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Isotope Composition ◽  
Fourier Transform Infrared ◽  
Spectroscopic Technique ◽  
Far Field ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Quartz Grains

We report an infrared (IR) spectroscopic technique to detect quartz grains with large isotope anomalies. We synthesized isotopically doped quartz and used Fourier transform infrared spectroscopy (FT-IR) in two different instruments: a traditional far-field instrument and a neaSpec nanoFT-IR, to quantify the shift in the peak of the Si–O stretch near 780 cm−1 as a function of isotope composition, and the uncertainty in this shift. From these measurements, we estimated the minimum detectable isotope anomaly using FT-IR. The described technique can be used to nondestructively detect very small (30 nm) presolar grains. In particular, supernova grains, which can have very large isotope anomalies, are detectable by this method.

scholarly journals Researching carbon varieties from season-caused shell for use of H2O2 properties to treat lead

2020 ◽  
Vol 4 (2) ◽  
pp. first
Author(s):  
Dao Minh Trung ◽  
Tram Thi Thanh Nguyen
Keyword(s):  
Heavy Metals ◽  
Functional Groups ◽  
Research Results ◽  
Chemical Mechanisms ◽  
Sem Image ◽  
Study Results ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Physical And Chemical ◽  
Ft Ir Spectroscopy

The study assumes lead wastewater treatment with initial concentration fixed at 30 ppm and research material, denatured coal prepared from macadamia seed shell activated by heating, and finally variable Coal calculation with H2O2 agent. The coal was modified by soaking coal in 25% H2O2 solution for 48 hours. Coal after denatured for adsorption results reached 266.26 mg/g, the research results show similarities with some previous studies. On the other hand, when analyzing the infrared spectrum of coal, the FT-IR spectroscopic results showed that after denatured coal, there were some functional groups such as OH-, C-O, C=O, C-N, functional groups capable of participating in the adsorption of heavy metals in wastewater. When observing the SEM image, the photo results of the material show that the surface of the material is rough, with many pores and different sizes evenly distributed on the surface. From SEM image results and FT-IR spectroscopy results show that the material has the ability to adsorb heavy metals by many physical and chemical mechanisms. Indeed, when researching the application of materials to the treatment of lead heavy metals in presumptive wastewater, the research results show that lead treatment efficiency reaches 94.05% when surveyed at the same optimal conditions at pH = 6 with dose of 0.4 g/L and duration of 60 minutes. The control shows that the study results are similar to some previous research results, from which it can be confirmed that the modified coal material is capable of Pb (II) treatment in wastewater.

Polymerization Kinetics of Methacrylic Groups in Organic-Inorganic Hybrid Polymeric Thin Films

2007 ◽  
Vol 1007 ◽  
Author(s):  
Congji Zha ◽  
Xinshi Luo ◽  
Barry Luther-Davies
Keyword(s):  
Thin Films ◽  
Thermal Treatment ◽  
Spectroscopic Technique ◽  
Polymerization Kinetics ◽  
Polymerization Process ◽  
Thermal Curing ◽  
Polymeric Thin Films ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Kinetics Of

ABSTRACTIn this paper, the polymerization kinetics of unsaturated double bonds (C=C) in TiO2- and ZrO2-doped hybrid polymeric thin films during UV irradiation and thermal curing is studied by monitoring the variation of C=C absorption band at 1630 cm-1 using FT-IR spectroscopic technique. Experimental results showed that polymerization of the unsaturated C=C groups in the TiO2- and ZrO2-doped hybrid polymers can be realized by either photo-irradiation or thermal treatment. The UV-induced polymerization process is much faster than thermal curing, but a full conversion of C=C groups into polyacrylate chains cannot be achieved without thermal treatment. The catalytic effect of TiO2 and ZrO2 on promoting the polymerization of C=C groups was observed, and the time of UV exposure and thermal curing for cross-linking C=C bonds was found to decrease with the increase of the concentration of TiO2 and ZrO2. The activation energy of the hybrid material containing varied concentration of TiO2 and ZrO2 was calculated, and the results indicated that TiO2 is more active than ZrO2 in promoting the polymerization of the unsaturated C=C bonds. Finally, the mechanisms for TiO2 and ZrO2 enhancing the material's photosensitivity (i.e. promoting polymerization of C=C bonds) have been proposed and discussed.

FT-IR Spectroscopic Investigation of 4,4'-Bipyridine Adsorption on Metal Oxide Surfaces

1996 ◽  
Vol 50 (3) ◽  
pp. 310-315 ◽  
Author(s):  
Stephen A. Bagshaw ◽  
Ralph P. Cooney
Keyword(s):  
Three Dimensional ◽  
Acid Sites ◽  
Spectroscopic Technique ◽  
Metal Oxide Surfaces ◽  
Silica Alumina ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
First Time ◽  
Surface Chemistries

4,4‘-Bipyridine (4bipy) adsorption on the surfaces of silica, alumina, and titania and the infrared (IR) spectra obtained therefrom are reported for the first time. This paper constitutes the second part of a multi-faceted investigation into the development of a vibrational spectroscopic technique for the determination of distances between surface acid sites of three-dimensional solid acids. The aforementioned oxides were chosen because their surface chemistries are generally well understood and because they constitute the pillars within pillar interlayered clay (PILC) catalysts. However, there is little information in the literature regarding the surface interactions of this novel and potentially useful spectroscopic probe. The pore structures of PILC materials have been investigated through 4bipy adsorption, the results of which will be reported in a later paper. The spectra obtained for adsorption on the parent oxides are discussed with reference to earlier 4bipy and 2,2’-bipyridine (2bipy) adsorption studies and indicate that the mode of adsorption is a unidentate, “end-on” arrangement in agreement with that observed for adsorption on MgO. This mode of adsorption results in a reduction in molecular symmetry of the adsorbed 4bipy from D2 h to C2γ. A previously unreported observation involving the high-temperature cleavage of the inter-ring bond of 4bipy adsorbed on γ-alumina and titania Lewis acid sites is described.

Spectroscopic detection of Hg2+ in water samples using fluorescent carbon quantum dots as sensing probe

2021 ◽  
Vol 20 (1) ◽  
pp. 1-18
Author(s):  
Lavkesh Kumar Singh Tanwar ◽  
Srishti Sharma ◽  
Kallol K. Ghosh
Keyword(s):  
Quantum Dots ◽  
Water Samples ◽  
Carbon Quantum Dots ◽  
Spectroscopic Technique ◽  
Highly Sensitive ◽  
Ft Ir ◽  
Gibb’S Free Energy ◽  
Average Size ◽  
Ir Spectroscopic

Mercury (Hg2+) is remarked as toxic and hazardous element to global environment. Here, carbon quantum dots (CQDs) were synthesized by simple microwave assisted technique for Hg2+ detection in water samples via. fluorescence quenching and FT-IR spectroscopic approach. The morphology and chemical structure of synthesized CQDs was investigated by TEM, FT-IR, 13C-NMR, fluorescence and UV-vis spectroscopic technique. The resultant CQDs bears spherical morphology with an average size of 2–4 nm. The binding parameters, as Stern-Volmer quenching constant (Ksv) and binding constant for CQDs-Hg system was investigated by fluorescence method, whereas UV-vis techniques was employed for determination of thermodynamic parameters, as Gibb’s free energy (ΔG), enthalpy (ΔH) and entropy (ΔS) at three different temperature (295, 298 and 305 K). Moreover, selectivity assay for Hg2+ detection has been studied in presence of other metal ions by FT-IR as well as fluorescence spectroscopy. Analytical assay was also successfully applied for Hg2+ in spiked water samples collected from different areas of Chhattisgarh, with 98–99 recovery %. The detection of Hg2+ has been demonstrated in the range of 0 to 5.0μM with 3.25 nM detection limit. The present method is found to be simple, highly sensitive and selective for sensing of Hg2+ in aquatic environmental samples using CQDs as sensing probe.

Spectral Investigation on the Growth and Characterization of NLO Crystals of Thiourea Succinic Acid Single Crystal.

2015 ◽  
Vol 2 (2) ◽  
pp. 70-73
Author(s):  
Kannan.P ◽  
Thambidurai.S ◽  
Suresh.N
Keyword(s):  
Single Crystal ◽  
Succinic Acid ◽  
Slow Evaporation Technique ◽  
Absorption Studies ◽  
Dta Analysis ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Thermal Stability Of

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.

scholarly journals Quantitative analysis of doxorubicin hydrochloride and arterolane maleate by mid IR spectroscopy using transmission and reflectance modes

BMC Chemistry ◽  
2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Ranju Bansal ◽  
Ranjit Singh ◽  
Khushpal Kaur
Keyword(s):  
Quantitative Analysis ◽  
Spectroscopic Methods ◽  
Doxorubicin Hydrochloride ◽  
Intermediate Precision ◽  
Solid Dosage ◽  
Ich Guidelines ◽  
Relative Standard ◽  
Ft Ir ◽  
Solid Bulk ◽  
Ir Spectroscopic

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.

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