Electrochemistry of the Interaction of Methane with Platinum at Room Temperature Investigated through Operando FTIR Spectroscopy and Voltammetry

2021 ◽  
Vol 125 (5) ◽  
pp. 2944-2955
Author(s):  
Sadi M. Gurses ◽  
Coleman X. Kronawitter
Keyword(s):  
Ftir Spectroscopy ◽  
Room Temperature

Peculiarities of the energy spectrum of InSb/InAs/InGaAs/InAlAs/GaAs nanoheterostructures revealed by room temperature photomodulation FTIR spectroscopy

2019 ◽  
Vol 58 (5) ◽  
pp. 050923 ◽  
Author(s):  
Oleg S. Komkov ◽  
Dmitrii D. Firsov ◽  
Aleksey D. Andreev ◽  
Mikhail Yu. Chernov ◽  
Victor A. Solov’ev ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Ftir Spectroscopy ◽  
Room Temperature

scholarly journals Influence of Erbium Ions on the Optical and Structural Properties of Polyvinyl Alcohol

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Taymour A. Hamdalla ◽  
Taha A. Hanafy ◽  
Ashraf E. Bekheet
Keyword(s):  
Refractive Index ◽  
Polyvinyl Alcohol ◽  
Aqueous Solutions ◽  
Ftir Spectroscopy ◽  
Room Temperature ◽  
Energy Gap ◽  
Optical Measurement ◽  
Optical Parameters ◽  
Erbium Ions ◽  
Erbium Chloride

Polyvinyl alcohol (PVA) films doped with erbium chloride (ErCl3) have been prepared by casting from their aqueous solutions. The structure of the doped samples as well as the interactions between the host PVA and Er+3was investigated using FTIR spectroscopy. The optical measurement was recorded at room temperature in the range from 200 nm to 2000 nm. FTIR measurements revealed that Er+3forms complex configuration within the PVA structure. PVA doped with 9 wt% of ErCl3exhibits energy gap and refractive index of 5.1 eV and 1.72, respectively. The effect of the doping increment of ErCl3on the optical parameters has been discussed.

Comparison of Polarities of Room-Temperature Ionic Liquids Using FT-IR Spectroscopic Probes

2005 ◽  
Vol 58 (5) ◽  
pp. 327 ◽  
Author(s):  
Guo-hong Tao ◽  
Ming Zou ◽  
Xiao-hua Wang ◽  
Zhi-yu Chen ◽  
David G. Evans ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Ionic Liquids ◽  
Ftir Spectroscopy ◽  
Room Temperature ◽  
General Type ◽  
Room Temperature Ionic Liquids ◽  
Spectroscopic Probes ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Solvent Properties

The solvent properties, especially the polarity, of room-temperature ionic liquids (RTILs) of the general type [Cnmim]X, where [Cnmim] is the 1-CnH2n+1-3-methylimidazolium cation and X is [BF4]−, [PF6]−, [NO3]−, [SCN]−, or [NTf2]− (Tf = CF3SO2), have been investigated using Fourier-transform infrared (FTIR) spectroscopy. Comparing the experimental shifts in the νC=O stretching frequencies of acetone and N,N-dimethylformamide (DMF) as probe molecules suggests that the polarities of most common RTILs are between that of DMF and methanol. A more sensitive probe, Fe(CO)5, can distinguish small polarity differences between RTILs with similar structures. The effects of varying the structure of RTILs by introducing functional groups and different anions on their polarity are also compared.

scholarly journals Comprehensive Investigation of Thermal Degradation Characteristics and Properties Changes of Plant Edible Oils by FTIR-Spectroscopy

2019 ◽  
Vol 27 (2) ◽  
pp. 263-286
Author(s):  
Fatos Rexhepi ◽  
Andriana Surleva ◽  
Arbër Hyseni ◽  
Melisa Bruçi ◽  
Blerina Kodraliu
Keyword(s):  
Ftir Spectroscopy ◽  
Room Temperature ◽  
Edible Oils ◽  
Fatty Acid Content ◽  
Thermal Heating ◽  
Degree Of Unsaturation ◽  
Absorbance Ratio ◽  
Initial Decrease ◽  
Specific Absorbance

Abstract Structural characterization of edible oils after thermal treatment was made by (FTIR) spectroscopy. Olive, corn and sunflower oil samples were thermally treated at three consecutive cycles. Each cycle consisted of heating at the boiling point for 8 h, followed by cooling at room temperature for 16 h. At the end of each cycle the characteristics of oils were studied by FTIR spectroscopy and standard methods. Study of FTIR spectra of the treated oils revealed that the heating of oils caused significant changes in the intensities of their bands and produced shifts in the position of specific bands such as 3008 cm−1 and 1745 cm−1. The level of oil oxidation during different heating period was followed by the absorbance ratio at 3530/3472 cm−1. Additionally, the absorbance ratio 2853/3008 cm−1 was used as a measure of degree of unsaturation. The thermal heating of oils produced an initial decrease in the specific absorbance ratios which could be attributed to the reduction of unsaturated fatty acid content due to oxidation process. The results in this study demonstrated that FTIR could be used for assessment of the state of oils by using specific absorbance ratios as indicators.

Structural Characterization of Nano-Crystalline BaTiO3 Powder Prepared Using Hydrothermal Method

2011 ◽  
Vol 324 ◽  
pp. 205-208 ◽  
Author(s):  
Ziyad S. A. Al Sarraj ◽  
Mukhlis M. Ismail ◽  
Sabah M. Ali ◽  
Wan Q. Cao
Keyword(s):  
Ftir Spectroscopy ◽  
Crystallite Size ◽  
Structural Characterization ◽  
Tetragonal Phase ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Nano Crystalline ◽  
Vibrational Bands ◽  
Ft Raman

BaTiO3powders were prepared hydrothermally using TiCl4, Ba(OH)2.8H2O and NH4OH as starting materials at 150°C for 2h. The structure of the prepared nanocystalline BT powders were a metastable cubic perovskite according to XRD and HRTEM analysis, while FT Raman spectra showed that BT powders have a tetragonal structure. Hydroxyl and carbonate groups were observed in all prepared powders that showed in FTIR spectroscopy as vibrational bands. The tetragonal phase of BT powder was identified clearly by slow scan XRD at 2θ between 44.6 to 46°. The crystallite size of BT powders have increased with the increase of annealing temperature from 19 nm at room temperature to 70 nm at 1000°C.

The Structure and Light Emitting of Silicon-Doped Boron Nitride Nanotubes

2012 ◽  
Vol 616-618 ◽  
pp. 1898-1901 ◽  
Author(s):  
Shi Feng Xu ◽  
Dan Xu
Keyword(s):  
Electron Microscopy ◽  
Optical Properties ◽  
Boron Nitride ◽  
Ftir Spectroscopy ◽  
Room Temperature ◽  
Energy Levels ◽  
Boron Nitride Nanotubes ◽  
Structural And Optical Properties ◽  
Light Emitting ◽  
Silicon Doped

In this paper, we report the structural and optical properties of bamboo-like silicon-doped boron nitride nanotubes. The morphologies and structures of the nanotubes were characterized using electron microscopy and FTIR spectroscopy. Three strong broad peaks centered at 1.76ev, 2.20ev, 2.40ev were observed from the room-temperature PL spectrum of the nanotubes. The spectrum suggested the existence of multifold energy levels within the band gap.

Peculiarities of near-room-temperature thermal-emission measurements using FTIR spectroscopy

2018 ◽  
Author(s):  
Yuzhe Xiao ◽  
Alireza Shahsafi ◽  
Patrick J. Roney ◽  
Chenghao Wan ◽  
Graham Joe ◽  
...  
Keyword(s):  
Ftir Spectroscopy ◽  
Room Temperature ◽  
Thermal Emission

scholarly journals Hevea Braziliensis Nr Part 2: Potential Commercial Application of Methyl Methacrylated Nr, Heveaplus Mg50 in The Paint and Coating Industries With The Atr Ftir Spectral Analyses of the Final Blend Composite With Acrylate Emulsified Paint

2020 ◽  
pp. 1-1
Author(s):  
Chan Boon Lye ◽  
◽  
Yeoh Guan Aun ◽  
Ong Kian Huat ◽  
◽  
...  
Keyword(s):  
Composite Material ◽  
Ftir Spectroscopy ◽  
Room Temperature ◽  
Commercial Application ◽  
Spectral Analyses ◽  
Emulsion Paint ◽  
A Minor ◽  
Final Composition ◽  
Final Composite

The final composition of the blended Heveaplus MG50 and polyacrylic emulsion paint composition, the depolymerised Heveaplus MG50 latex was mixed with polyacrylic emulsified paint with a minor active pre-dispersed curative agents, other diluent additives and dispersion agents, which was heated up in a steam-batch at 70-80 °C for 25 minute, cool to room-temperature, then the analysis of the final composite material was done using the Bruker ATR FTIR spectroscopy

scholarly journals Functional nano fillers in epoxy-dicyandiamide adhesives for prolonged shelf life and efficient cure

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Jan Christoph Gaukler ◽  
Ulrich Müller ◽  
Jan Kristian Krüger ◽  
Wulff Possart
Keyword(s):  
Elevated Temperature ◽  
Bisphenol A ◽  
Light Microscopy ◽  
Shelf Life ◽  
Ftir Spectroscopy ◽  
Room Temperature ◽  
Network Formation ◽  
Curing Temperature ◽  
Modulated Dsc

AbstractShelf life at room temperature and curing behaviour at elevated temperature are studied for hot-curing accelerated epoxies (EP, diglycidylether of bisphenol A plus dicyandiamide (Dicy)) by FTIR-spectroscopy and modulated DSC. The accelerator is added either directly or with nano-zeolite filler to the EP. Due to the immobilisation of the accelerator in the pores of the nano-zeolite, the shelf life of this EP is 5 times longer than for the EP containing free accelerator. While the free accelerator acts during the whole heating step to curing temperature, the nano-zeolite does not release the accelerator before ca. 100 °C. As monitored by light microscopy, the released accelerator not only supports the curing but also stimulates the dissolution of the solid Dicy. As the result, network formation at 170 °C finishes within less than 25 minutes for the nano-filled EP.

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