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.

Facilitation of the visible light-induced Fenton-like excitation of H2O2 via heterojunction of g-C3N4/NH2-Iron terephthalate metal-organic framework for MB degradation

Abstract: g-C 3 N 4 /NH 2 -Iron terephthalate metal-organic framework heterojunction for visible light-induced Fenton-like excitation of H 2 O 2 for MB degradation was investigated in this work. The g-C 3 N 4 /NH 2 -MIL-88B(Fe) (namely lp-x composite) was hydrothermally synthesized and characterized by powder X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, UV–vis diffused reflectance spectroscopy, spin-trapping electron paramagnetic resonance and photoluminescence analysis. 100% of MB photodegradation was achieved by the lp-2 in 120 min under visible light, much greater than the parent g-C 3 N 4 and NH 2 -MIL-88B(Fe), individually. The synergistic index in the lp-2/visible-light/H 2 O 2 system reached as high as 305%. The excitation of H 2 O 2 over the lp-2 composite is clarified to go through (i) the direct and (ii) the photo-induced Fenton-like reactions, while the latter is greatly facilitated by the formation of the g-C 3 N 4 /NH 2 -MIL-88B(Fe) heterojunction. In the lp-2 composite, the photoelectron transfers efficiently from the CB of g-C 3 N 4 to NH 2 -MIL-88B(Fe) for enhanced Fenton-like excitation of H 2 O 2 , rather than eliminates through e − -h + pair recombination on g-C 3 N 4 , verified by the photoluminescence analysis and electron spin resonance technique. This work demonstrates the first example of facilitating Fenton-like excitation of H 2 O 2 via introduction of g-C 3 N 4 to stable amine functionalized Fe-centered MOF for visible light-induced photodegradation.

Synthesis of Alkyl-Terminated Silicon Nanoclusters by a Solution Route

Abstract: We describe the synthesis and characterization of alkyl-capped nanocrystalline Si (R-n−Si) prepared by the reaction of SiCl4 with Mg2Si in ethylene glycol dimethyl ether (glyme) and surface-terminated with various alkyl groups, R-n−Si (R = methyl, ethyl, n-butyl, and n-octyl). This reaction produces crystalline nanoparticles with surfaces that can be chemically modified. The resultant crystalline nanoparticles can be suspended in organic solvents or isolated as a powder. The nanoclusters were characterized by transmission electron microscopy (TEM), high-resolution TEM, selected area electron diffraction (SAED), and Fourier transform infrared (FTIR) spectroscopy, electron paramagnetic resonance (EPR) spectroscopy, UV−vis absorption, and photoluminescence spectroscopy. The average cluster size depends on the reflux time of Mg2Si with SiCl4, which provided nanoclusters with an average size of 2−5 nm. HRTEM confirms the presence of crystalline nanoclusters, and SAED is consistent with diamond-structured sil...