2023年4月15日 · Cr (VI) speciates as Chromates, Dichromates and CrO 3, and partly as spinels. Highest levels of Cr (VI) in MMA welding, compared to FCAW, and MIG/MAG. FTIR is facile, …

According to reports, the FTIR spectra of CR dye has distinctive peaks at 3460 cm −1 , 1586 cm −1 , 1453 cm −1 , and 1376 cm −1 , respectively, which stand for the hydrogenbonded -OH/NH 2 ...

1 天前 · CR-39 detector can be utilized for low LET radiation measurement at high dose by the use of FTIR spectroscopic technique combined with chemical etching.

FTIR and Raman spectroscopic analysis indicated that increasing doping of CrO3 changes the structural network by increasing the number of nonbridging oxygens (NBO) within the glassy matrix.

Fourier transform infrared spectroscopy (FT-IR) was employed to ascertain surface group species of the samples. UV–Vis spectroscopy was used to determine the energy band...

2023年11月15日 · MIL-101 (Cr) is one of the most stable MOFs with good thermal/chemical stability due to the strong Cr-O bonding, which is composed of trivalent Cr (III) clusters and terephthalic acid [23]. In the past decades, efforts have been devoted in pollutant removal and precious metal recovery in wastewater.

2019年6月28日 · This paper reports on the use of two-dimensional correlation Fourier transformation Infrared 2D-COS-FTIR, Raman spectroscopies and X-ray diffraction to provide information about the structure of MIL-101 (Cr), and the mechanism of iodine adsorption from cyclohexane solution.

2015年11月27日 · The reaction mechanisms of lignin with Cr (III) and Cr (VI) were investigated using Cr K -edge X-ray spectroscopy (XAS) and FTIR spectroscopy. The spectroscopic results for lignin reacted with Cr (III) showed that the adsorbed Cr (III) has a coordination environment similar to that of ion, and the carbonyl groups of lignin are predominately ...

In this study, Cr (VI) adsorption on lepidocrocite with different exposed facets was investigated via macroscopic batch experiments, synchrotron-based X-ray absorption fine structure (XAFS) spectroscopy, in situ ATR-FTIR spectroscopy, and density functional theory (DFT) calculations.

一、光谱峰位，峰数和峰强1.峰位 化学键的力常数K越大，原子折合质量越小， 键的振动频率越大，吸收峰将出现在高波数区 (短波长区)反之，出现在低波数区 (高波长区)。 2.峰数 峰数与分子自由度有关。 无瞬间偶基距变化时，无红外吸收。 3.峰强 瞬间偶基距变化大，吸收峰强;键两端原子电负性相差越大 (极性越大)，吸收峰越强; 由基态跃迁到第一激发态，产生一个强的吸收峰，基频峰;由基态直接跃迁到第二激发态，产生一个弱的吸收峰，倍频峰; 峰强补充问题问题: C=O …