Topic
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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TL;DR: In this article, the authors used Fourier transform infrared spectroscopy (FTIR), high-performance liquid chromatography (HPLC), scanning electron microscopy (SEM), transmission electron microscope (TEM), and thermogravimetric analysis (TGA) to study the coke-depositing behaviors of zeolite catalysts.
Abstract: Coke deposition on the zeolite catalysts in the conversion of furan (a main intermediate of biomass fast pyrolysis) is of serious concern for catalyst deactivation and product distribution. It is important to find out the nature and composition of coke on the spent ZSM-5 catalyst to study the coke-depositing behaviors. In this work, spent ZSM-5 catalysts obtained from furan catalytic conversion for chemicals at different reaction times and pyrolysis temperatures were characterized. The spent catalysts were first treated with hydrofluoric acid, and then the organics were extracted with CH2Cl2. The characterization of the origin coke and the treated insoluble coke were analyzed by the combination of some analytical techniques, including Fourier transform infrared spectroscopy (FTIR), high-performance liquid chromatography (HPLC), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The extracted organics were analyzed by HPLC to determine the chem...
174 citations
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TL;DR: In this article, a green and facile approach to produce graphene by using an environmentally friendly reagent, namely, l-glutathione as a reducing agent, was developed, and the resulting graphene was characterized using a range of analytical techniques.
174 citations
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TL;DR: In this article, the authors applied spatially resolved Fourier transform infrared (FT-IR) spectroscopy of single oral mucosa cells to acquire structural information of cell organelles.
174 citations
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TL;DR: CeO2/CdO multi-layered nanoplatelet arrays showed antibacterial activity and among the tested ones, it showed better growth inhibition towards P. aeruginosa MTCC73 and this greener synthetic procedure was a highly effective method due to low-cost, highly effective UV light responsive material for environmental safety.
Abstract: CeO2/CdO multi-layered nanoplatelet arrays have been synthesized by sol-gel method at two different temperatures using Citrus limonum fruit extract and the effect of particle size on the photocatalytic performance is studied. The particle size and phases was analysed by X-ray diffraction pattern (XRD) which brought out the formation of cubic phase in the synthesized samples. Field Emission Scanning electron microscopy (FESEM) revealed the surface morphology and made up of cumulative form of platelet shaped arrays with an average size of 10nm. The elemental composition and the purity of the nanomaterials were confirmed by Energy Dispersive X-ray spectroscopy (EDX). CeO2/CdO multilayered binary metal oxide nanoplatelet arrays were formed which was further explored with Fourier transform infrared spectroscopy (FTIR), it reveals that the nanocomposites contain CeO and CdO bonds. Determination of the direct and indirect bandgap energy of the nanoplatelet arrays was carried out by UV-Vis-DRS studies. In MG degradation, both the hole (h+) and hydroxyl radical (OH) played a major role than the superoxide radical (O2-). Possible photo degradation mechanisms are proposed and discussed in this article. CeO2/CdO multi-layered nanoplatelet arrays showed antibacterial activity and among the tested ones, it showed better growth inhibition towards P. aeruginosa MTCC73. Thus, this greener synthetic procedure was a highly effective method due to low-cost, highly effective UV light responsive material for environmental safety.
174 citations
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TL;DR: In this article, the green synthesis of Cu/eggshell, Fe3O4 /eggshell and Cu/Fe3O/4/shell nanocomposites through an environmental and economical method using aqueous extract of the leaves of Orchis mascula L. without any stabilizer or surfactant.
Abstract: This paper is reported on the green synthesis of Cu/eggshell, Fe3O4/eggshell and Cu/Fe3O4/eggshell nanocomposites through an environmental and economical method using aqueous extract of the leaves of Orchis mascula L. without any stabilizer or surfactant. The nanocomposites showed high catalytic activity in the reduction of a variety of dyes and characterized by Fourier transform infrared spectroscopy (FT-IR), differential thermal and thermogravimetric (DTA-TGA) analysis, field emission scanning electron microscopy (FESEM) equipped with an energy dispersive spectroscopy (EDS), elemental mapping, X-ray diffraction analysis (XRD), Brunauer–Emmett–Teller (BET), vibrating sample magnetometer (VSM) and UV–vis spectroscopy. The possible mechanism leading to the formation of copper nanoparticles (NPs) is also suggested. The facile and clean synthesis, simple preparation procedure, excellent properties, alterable supports and low cost allow these catalysts to be used in reduction of 4-nitrophenol (4-NP), Methyl orange (MO), Congo red (CR), Methylene blue (MB) and Rhodamine B (RhB) in water at room temperature. The progress of the reaction was monitored using UV–vis spectroscopy. The catalysts could be easily removed from the reaction media by mild centrifugation or an external magnet and reused several times without any negative effect on the initial results.
174 citations