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.

In situ attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy combined with non-negative matrix factorization for investigating the synthesis reaction mechanism of 3-amino-4-amino-oxime furazan

2018 ◽  
Vol 10 (48) ◽  
pp. 5817-5822 ◽  
Author(s):  
Tianlong Zhang ◽  
Ting He ◽  
Chunhua Yan ◽  
Xinyu Gao ◽  
Junxiu Ma ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Reaction Mechanism ◽  
Ftir Spectroscopy ◽  
Matrix Factorization ◽  
Fourier Transform Infrared ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Synthesis Reaction ◽  
Non Negative Matrix Factorization

In situ ATR-FTIR combined with non-negative matrix factorization for investigating the synthesis reaction mechanism of 3-amino-4-aminoximefurazan.

Fourier transform infrared spectroscopic monitoring of sol–gel process in synthesis of PbS–TiO2 hybrid nanostructures

2010 ◽  
Vol 518 (23) ◽  
pp. 6729-6732 ◽  
Author(s):  
Mohammadreza Khanmohammadi ◽  
Hassan Ghafoori Fard ◽  
Amir Bagheri Garmarudi ◽  
Nafiseh Khoddami
Keyword(s):  
Fourier Transform ◽  
Sol Gel ◽  
Fourier Transform Infrared ◽  
Hybrid Nanostructures ◽  
Spectroscopic Monitoring ◽  
Sol Gel Process ◽  
Infrared Spectroscopic

Pd Nanoparticles Fabricated on Organic-Group Modified Silica and its Catalytic Performance for Acetylene Hydrogenation

2011 ◽  
Vol 233-235 ◽  
pp. 1884-1888
Author(s):  
Kang Jun Wang ◽  
Jing Wu ◽  
Ping Yu
Keyword(s):  
Sol Gel ◽  
Co Adsorption ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Pd Catalyst ◽  
Modified Silica ◽  
In Situ Drifts ◽  
Organic Group ◽  
Sol Gel Process

Aminopropyl-functionalized silica (NH2-SiO2) was obtained via a sol-gel process using tetraethoxylsilicate (TEOS) and aminopropyltriethoxysilane (APTES). Aminopropyl group contained silica was further modified with formaldehyde to achieve a novel organic group modified silica, denoted as CH2O-SiO2. Using CH2O-SiO2 as support to prepare surported Pd catalyst (denoted as Pd/M-SiO2), small Pd nanoparticles (1-2 nm) were fabricated on CH2O-SiO2 surport. Hydrogenation of acetylene is used as probe reaction to evaluate the catalytic performance of Pd/M-SiO2. The results indicate that Pd/M-SiO2 exhibits unique catalytic property, which the selectivity of ethylene increases with the increase of acetylene conversion. In-situ DRIFTS spectra of CO adsorption show that the organic groups presented on the silica affect the electronic property of the very small Pd nanoparticles, which causes the change of reaction paths of hydrogenation of acetylene over Pd/M-SiO2 compared with traditional supported Pd catalyst.

Dependence of the intrinsic phase structure of Bi2O3 catalysts on photocatalytic CO2 reduction

2021 ◽  
Vol 11 (6) ◽  
pp. 2021-2025
Author(s):  
Liujin Wei ◽  
Guan Huang ◽  
Yajun Zhang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Phase Structure ◽  
Co2 Reduction ◽  
Fourier Transform Infrared ◽  
Time Resolved ◽  
Dependent Activity

The combination of time-resolved transient photoluminescence with in-situ Fourier transform infrared spectroscopy has been conducted to investigate the intrinsic phase structure-dependent activity of Bi2O3 catalyst for CO2 reduction.

Detection of bloodstains using attenuated total reflectance-Fourier transform infrared spectroscopy supported with PCA and PCA–LDA

2021 ◽  
pp. 002580242110109
Author(s):  
Sweety Sharma ◽  
Rito Chophi ◽  
Jaskirandeep Kaur Jossan ◽  
Rajinder Singh
Keyword(s):  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Body Fluid ◽  
Due Process ◽  
Dna Analysis ◽  
Fourier Transform Infrared ◽  
Body Fluids ◽  
Attenuated Total Reflectance ◽  
Total Reflectance ◽  
Non Destructive

The most important task in a criminal investigation is to detect and identify the recovered biological stains beyond reasonable scientific doubt and preserve the sample for further DNA analysis. In the light of this fact, many presumptive and confirmatory tests are routinely employed in the forensic laboratories to determine the type of body fluid. However, the currently used techniques are specific to one type of body fluid and hence it cannot be utilized to differentiate multiple body fluids. Moreover, these tests consume the samples in due process, and thus it becomes a great limitation especially considering the fact that samples are recovered in minute quantity in forensic cases. Therefore, such limitations necessitate the use of non-destructive techniques that can be applied simultaneously to all types of bodily fluids and allow sample preservation for further analysis. In the current work, attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy has been used to circumvent the aforementioned limitations. The important factors which could influence the detection of blood such as the effect of substrates, washing/chemical treatment, ageing, and dilution limits on the analysis of blood have been analysed. In addition, blood discrimination from non-blood substance (biological and non-biological in nature) has also been studied. Chemometric technique that is PCA–LDA has been used to discriminate blood from other body fluids and it resulted in 100% accurate classification. Furthermore, blood and non-blood substances including fake blood have also been classified into separate clusters with a 100% accuracy, sensitivity, and specificity. All-inclusive, this preliminary study substantiates the potential application of ATR-FTIR spectroscopy for the non-destructive identification of blood traces in simulated forensic casework conditions with 0% rate of false classification.

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