scholarly journals In situ ATR-FTIR study of H2O and D2O adsorption on TiO2 under UV irradiation

2015 ◽  
Vol 17 (35) ◽  
pp. 22940-22946 ◽  
Author(s):  
Hamza Belhadj ◽  
Amer Hakki ◽  
Peter K. J. Robertson ◽  
Detlef W. Bahnemann
Keyword(s):  
Ftir Spectroscopy ◽  
Uv Irradiation ◽  
Deuterium Oxide ◽  
Ftir Study ◽  
Adsorption Of Water

The adsorption of water and deuterium oxide on TiO2 surfaces was investigated in the dark as well as under UV(A) irradiation using in situ ATR-FTIR spectroscopy under oxygen and oxygen free conditions.

In situhigh pressure study of an elastic crystal by FTIR spectroscopy

CrystEngComm ◽  
2017 ◽  
Vol 19 (47) ◽  
pp. 7083-7087 ◽  
Author(s):  
Manish Kumar Mishra ◽  
Pallavi Ghalsasi ◽  
M. N. Deo ◽  
Himal Bhatt ◽  
Himanshu K. Poswal ◽  
...  
Keyword(s):  
High Pressure ◽  
Ftir Spectroscopy ◽  
Structural Changes ◽  
Ftir Study

Anin situhigh pressure-FTIR study on a 2,3-dichlorobenzylidine-4-bromoaniline elastic crystal shows significant structural changes at high pressure which revert back to the ambient structure on decompression.

FTIR Study on the Preliminary Development of Synthesis Methods for Hydroxyapatite Modified Silica Aerogel

2015 ◽  
Vol 799-800 ◽  
pp. 493-499 ◽  
Author(s):  
Nor Suriani Sani ◽  
Nik Ahmad Nizam Nik Malek ◽  
Mohammed Rafiq Abdul Kadir ◽  
Halimaton Hamdan
Keyword(s):  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Silica Aerogel ◽  
Sol Gel ◽  
Fourier Transform Infrared ◽  
Synthesis Methods ◽  
Modified Silica ◽  
Ftir Study ◽  
Sol Gel Process

Hydroxyapatite (HA) modified silica aerogel (SA) was synthesized based on 2 different techniques namely encapsulation andin-situvia aqueous colloidal sol-gel process. The structure of the synthesized HA modified SA have been studied using Fourier transform infrared (FTIR) spectroscopy. FTIR spectra of HA modified SA, derived fromin-situtechnique appear to be different from those of encapsulation technique and free HA, with the main difference lying in the phosphate bending absorbance. Results showed that the encapsulation technique preserved the native confirmation of HA in SA frameworks compared toin-situtechnique. It confirms that the use of an aqueous sol-gel encapsulation route provides a promising approach for the stabilization of HA in SA networks.

scholarly journals Effect of Water Leaching on Photodegraded Scots Pine and Spruce Timbers Monitored by FTIR Spectroscopy

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 833
Author(s):  
Edina Preklet ◽  
László Tolvaj ◽  
Eszter Visi-Rajczi ◽  
Tamás Hofmann
Keyword(s):  
Ftir Spectroscopy ◽  
Scots Pine ◽  
Uv Irradiation ◽  
Chemical Elements ◽  
Uv Light ◽  
Carbonyl Groups ◽  
Water Leaching ◽  
Absorption Bands ◽  
Chemical Changes ◽  
Absorption Increase

The goal of this research was the systematic study and comparison of the divided individual effects of UV light irradiation and water leaching during artificial weathering. Spruce (Picea abies Karst.) and Scots pine (Pinus sylvestris L.) samples were irradiated by ultraviolet (UV) light. Another sequence of samples was treated with the combination of UV irradiation and water leaching. The total extent of UV treatment was 20 days for both series of samples. Time relation of UV irradiation and water leaching was 2:1. The chemical changes were observed by FTIR spectroscopy. The difference spectrum was used for determination of the chemical changes. Degradation of lignin was greater for the leached samples than for the pure UV treated samples. Scots pine suffered greater lignin degradation than spruce, and produced higher absorption increase on the absorption region of unconjugated carbonyls. The unconjugated carbonyl groups were the most responsive chemical elements to leaching. Spruce was more susceptible to leaching of unconjugated carbonyl groups than Scots pine. Two absorption bands of unconjugated carbonyl groups at 1706 and 1764 cm−1 wavenumbers were produced by photodegradation. The absorption band at 1764 cm−1 was more sensitive to water leaching than the band at 1706 cm−1.

CO Oxidation and Site Speciation for Alloyed Palladium–Platinum Model Catalysts Studied by in Situ FTIR Spectroscopy

2017 ◽  
Vol 121 (47) ◽  
pp. 26321-26329 ◽  
Author(s):  
Natalia M. Martin ◽  
Magnus Skoglundh ◽  
Gudmund Smedler ◽  
Agnes Raj ◽  
David Thompsett ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Ftir Spectroscopy ◽  
Model Catalysts ◽  
In Situ Ftir ◽  
In Situ Ftir Spectroscopy ◽  
Palladium Platinum
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