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Fourier transform infrared spectroscopy

About: Fourier transform infrared spectroscopy is a research topic. Over the lifetime, 48250 publications have been published within this topic receiving 1134369 citations.


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Journal ArticleDOI
Ruowen Liang1, Lijuan Shen1, Fenfen Jing1, Weiming Wu1, Na Qin1, Rui Lin1, Ling Wu1 
TL;DR: In this paper, the metal-organic framework In-benzenedicarboxylate (MIL-68(In)) and its derivative (In-2-NH2-Benzene-dicaroxylate, MIL-68-In)-NH2) were prepared via a simple solvothermal method.
Abstract: Metal–organic framework In-benzenedicarboxylate (MIL-68(In)) and its derivative (In-2-NH2-benzene-dicarboxylate, MIL-68(In)-NH2) were prepared via a simple solvothermal method. Powder X-ray diffraction (XRD) confirmed the isoreticular nature of MIL-68(In) and MIL-68(In)-NH2, while Fourier transformed infrared spectra (FTIR) proved the effective presence of amino group. Moreover, combined with UV–vis diffuse reflectance spectra (DRS) analysis, it was revealed MIL-68(In)-NH2 shown an extra absorption band in the visible light region with the absorption edge extending to around 440 nm. Importantly, MIL-68(In)-NH2 was proved to perform as an efficient visible-light-driven photocatalyst with considerable activity and stability for the reduction of Cr(VI), which could be attributed to its relatively high CB based on the result of Mott–Schottky experiment. Further experimental results revealed that the addition of hole scavenger and pH value of the reaction solution played important roles in the photocatalytic reduction of Cr(VI). Finally, a possible reaction mechanism had also been investigated in detail.

263 citations

Journal ArticleDOI
TL;DR: In this paper, a co-precipitation method at different pH values was used to synthesize magnetite Fe 3 O 4 nanoparticles and the results showed that the shape of the particles is cubic and they are superparamagnetic at room temperature.

262 citations

Journal ArticleDOI
TL;DR: According to various characterizations including X-ray diffraction, transmission electron microscopy, FTIR, Brunauer-Emmett-Teller, XPS, and UV-vis diffuse reflectance spectra, the higher activity of the TiO2N(SC) could be attributed to its higher surface area, larger pore volume, well-crystallized anatase, and stronger absorbance of light with longer wavelength.
Abstract: N-doped TiO2 photocatalysts were prepared by pretreating the TiO2 precursor in NH3/ethanol fluid under supercritical conditions, denoted as TiO2N(SC). In contrast to the TiO2N(DC), obtained via direct calcination in which the N dopants were mainly present in the form of surface adsorbed NH3 molecules, most N dopants in the TiO2N(SC) were present in O−Ti−N and N−Ti−N nitrides, as confirmed by either the X-ray photoelectron spectroscopy (XPS) and or the Fourier transform infrared (FTIR) spectra. During liquid-phase oxidative degradation of phenol under irradiation with UV light characteristic of 365 nm, the TiO2N(SC) exhibited much higher activity than either the TiO2N(DC) or the TiO2(SC), i.e., the undoped TiO2 obtained under SCs. According to various characterizations including X-ray diffraction, transmission electron microscopy, FTIR, Brunauer−Emmett−Teller, XPS, and UV−vis diffuse reflectance spectra, the higher activity of the TiO2N(SC) could be attributed to its higher surface area, larger pore volume...

262 citations

Journal ArticleDOI
TL;DR: In this paper, powder X-ray diffraction (PXRD) analysis, scanning electron microscopy (SEM), Transmission electron microscope (TEM), Fourier transformed infrared (FTIR) spectroscopy, photoluminescence (PL) and Electron Paramagnetic Resonance (EPR) measurements were used for characterization.

262 citations

Journal ArticleDOI
TL;DR: In this article, the polymer−water interaction in a model fibrous protein was investigated, and the detailed structural changes of silk fibroin during heating and during isothermal crystallization above the glass transition temperature was analyzed.
Abstract: We investigated the polymer−water interaction in a model fibrous protein. Bombyx mori silk fibroin film, a typical model of biodegradable material, was cast from aqueous solution and analyzed in this study. Differential scanning calorimetry (DSC), its temperature-modulated variant (TMDSC), and the time-resolved technique of Fourier transform infrared spectroscopy (FTIR) were used for the first time to monitor the detailed structural changes of silk fibroin during heating and during isothermal crystallization above the glass transition temperature, Tg ∼ 451 K (178 °C). Results show that intermolecular bound water molecules, acting as a plasticizer, will strongly affect the secondary structure of silk fibroin. DSC study shows that silk fibroin initially displays a water-induced glass transition around 80 °C during heating, resulting from a temporary bound water-silk structure. Quantitative thermal analysis of the heat capacity changes of this system during heating revealed that no β-sheet crystals were form...

261 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20236,741
202213,616
20212,802
20202,689
20192,808
20183,180