X-ray absorption spectroscopy of aqueous solutions in the X-ray energy region from 1800 to 3700 eV

A methodology for the X-ray XANES and EXAFS analyses of aqueous solutions was developed for the Double Crystal Monochromator (DCM) beamline of the Canadian Synchrotron Radiation Facility (CSRF). The technique is based on the implementation of a liquid cell, which is compatible with the standard solid-state sample holding mechanism used at the beamlines of CSRF and the Canadian Light Source (CLS). Aluminized Mylar film with a thickness of 5 μm has been thoroughly investigated for use as a window material for the cell, and found acceptable for the collection of the S, Cl, and K K-edge spectra of ions in aqueous solution, but not for P K-edge or Rb L2,3-edge spectra. Some of the limitations of this methodology, such as diffusion of the solution through the window and the detection limit at low ion concentration, are investigated and discussed.

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Time-resolved XAFS measurement using quick-scanning techniques at BSRF

Journal of Synchrotron Radiation ◽

10.1107/s1600577517005276 ◽

2017 ◽

Vol 24 (3) ◽

pp. 674-678 ◽

Cited By ~ 3

Author(s):

Shengqi Chu ◽

Lirong Zheng ◽

Pengfei An ◽

Hui Gong ◽

Tiandou Hu ◽

...

Keyword(s):

Signal To Noise Ratio ◽

High Energy ◽

High Energy Resolution ◽

Double Crystal ◽

Time Resolved ◽

Edge Structure ◽

X Ray ◽

Double Crystal Monochromator ◽

Good Signal ◽

X Ray Absorption

A new quick-scanning X-ray absorption fine-structure (QXAFS) system has been established on beamline 1W1B at the Beijing Synchrotron Radiation Facility. As an independent device, the QXAFS system can be employed by other beamlines equipped with a double-crystal monochromator to carry out quick energy scans and data acquisition. Both continuous-scan and trapezoidal-scan modes are available in this system to satisfy the time scale from subsecond (in the X-ray absorption near-edge structure region) to 1 min. Here, the trapezoidal-scan method is presented as being complementary to the continuous-scan method, in order to maintain high energy resolution and good signal-to-noise ratio. The system is demonstrated to be very reliable and has been combined with in situ cells to carry out time-resolved XAFS studies.

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Spectroscopy as a tool to detect multinuclear Cu(ii)–triethanolamine complexes in aqueous solution

Dalton Transactions ◽

10.1039/c7dt04146b ◽

2018 ◽

Vol 47 (11) ◽

pp. 3755-3763 ◽

Cited By ~ 2

Author(s):

Petra Lommens ◽

Pieter Tack ◽

Luce Vander Elst ◽

Isabel Van Driessche ◽

Laszlo Vincze ◽

...

Keyword(s):

Aqueous Solution ◽

Fine Structure ◽

Aqueous Solutions ◽

Nmr Relaxation ◽

Relaxation Dispersion ◽

X Ray ◽

Absorption Fine ◽

X Ray Absorption

The Evans method, Extended X-ray Absorption Fine Structure (EXAFS) and NMR relaxation dispersion (NMRD) spectroscopy were used to prove the existence of multimeric Cu(ii)–triethanolamine species in aqueous solutions.

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Design and feasibility of quick EXAFS scans for a `broomstick' double-crystal monochromator at PLS beamline

Journal of Synchrotron Radiation ◽

10.1107/s0909049598000831 ◽

1998 ◽

Vol 5 (3) ◽

pp. 524-526 ◽

Cited By ~ 8

Author(s):

J. M. Lee ◽

Nark-Eon Sung ◽

Jeong-Kweon Park ◽

Jah-Geol Yoon ◽

Jin-Hong Kim ◽

...

Keyword(s):

Fine Structure ◽

Step Motor ◽

Bragg Angle ◽

Scan Design ◽

Double Crystal ◽

X Ray ◽

Absorption Fine ◽

Double Crystal Monochromator ◽

Continuous Rotation ◽

X Ray Absorption

A data-collection technique for quick extended X-ray absorption fine-structure spectroscopy (QEXAFS) was developed with a new `broomstick' double-crystal monochromator, which has been installed for X-ray absorption fine-structure (XAFS) applications at the Pohang Light Source. The monochromator operates in a fixed-exit scan mode as the Bragg angle is varied from 8 to 80°, corresponding to 2–14 keV, using an Si(111) crystal. The monochromator scan capability was investigated by analysing EXAFS data quality from step-scan and from continuous rotation of the Bragg crystal reflection angle. In our fast continuous-scan design, the electronic pulsing speed of the step motor is adjustable to avoid the monochromatic beam instability caused by serious mechanical resonance. The feasibility of QEXAFS scanning is demonstrated by a typical EXAFS scan (e.g. 1 keV range) being taken within 1 min.

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A spectroscopic study of solvent effects on the formation of Cu(II)-chloride complexes in aqueous solution

Physical Chemistry Chemical Physics ◽

10.1039/d0cp05243d ◽

2021 ◽

Author(s):

ning zhang ◽

Jianfeng Tang ◽

Yuntian Ma ◽

Minghui Liang ◽

Dewen Zeng ◽

...

Keyword(s):

Aqueous Solution ◽

Aqueous Solutions ◽

Spectroscopic Study ◽

Solvent Effects ◽

Chloride Complexes ◽

Concentrated Aqueous Solutions ◽

X Ray ◽

X Ray Absorption

A combination of electronic (UV-Vis) and X-ray absorption (EXAFS, XANES) spectroscopies has been used to investigate the formation of copper(II)/chloride complexes in concentrated aqueous solutions. It is established that lowering...

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Ultrafast X-ray measurements of the glass-like, high-frequency stiffness of aqueous solutions

Physical Chemistry Chemical Physics ◽

10.1039/c7cp02747h ◽

2017 ◽

Vol 19 (31) ◽

pp. 21095-21100 ◽

Cited By ~ 1

Author(s):

Yishuo Jiao ◽

Bernhard Adams ◽

Christoph Rose-Petruck

Keyword(s):

Aqueous Solution ◽

Aqueous Solutions ◽

Absorption Spectroscopy ◽

High Frequency ◽

Ultrafast Dynamics ◽

Molecular Motions ◽

X Ray ◽

X Ray Absorption ◽

Hydrogen Bonded

The ultrafast dynamics of the domains surrounding solutes in aqueous solution were measured using laser-generating GHz phonons in 30 mM ferrocyanide solutions and the resulting molecular motions of the solutes and their hydrogen-bonded solvation shells were detected using ultrafast X-ray absorption spectroscopy (UXAS).

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Determination of Mn Site in BaTiO3 by X-Ray Absorption Spectroscopy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.55-57.273 ◽

2008 ◽

Vol 55-57 ◽

pp. 273-276 ◽

Cited By ~ 1

Author(s):

Rattikorn Yimnirun ◽

Jirapa Tangsritrakul ◽

Saroj Rujirawat ◽

Sukit Limpijumnong

Keyword(s):

Absorption Spectroscopy ◽

Local Structure ◽

Energy Calibration ◽

Double Crystal ◽

Edge Structure ◽

X Ray ◽

Double Crystal Monochromator ◽

X Ray Absorption ◽

Mn Doped

In this work, an experimental X-ray Absorption Spectroscopy (XAS) measurement was employed to determine the local structure of Mn in BaTiO3. Synchrotron X-ray absorption near-edge structure (XANES) experiments were performed on Mn-doped BaTiO3 samples. The BaTi0.8Mn0.2O3 powders were used for the XAS experiment. XAS spectra at the Mn K-edge were recorded in transmission mode. The spectra were collected at ambient temperature with a Ge(111) double crystal monochromator and recorded after performing an energy calibration. The features of the measured Mn K-edge XANES were consistent with Mn on the Ti site and inconsistent with Mn on other sites. The clear agreement was the strongest evidence of Mn substituting for Ti in BaTiO3.

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A DOUBLE CRYSTAL MONOCHROMATOR FOR SOFT X-RAY BEAM LINE OF UVSOR

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1986824 ◽

1986 ◽

Vol 47 (C8) ◽

pp. C8-135-C8-137

Author(s):

T. MURATA ◽

T. MATSUKAWA ◽

M. MORI ◽

M. OBASHI ◽

S.-I. NAO-E ◽

...

Keyword(s):

Beam Line ◽

Double Crystal ◽

X Ray ◽

Double Crystal Monochromator

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Magnetically Recyclable Wool Keratin Modified Magnetite Powders for Efficient Removal of Cu2+ Ions from Aqueous Solutions

Nanomaterials ◽

10.3390/nano11051068 ◽

2021 ◽

Vol 11 (5) ◽

pp. 1068

Author(s):

Xinyue Zhang ◽

Yani Guo ◽

Wenjun Li ◽

Jinyuan Zhang ◽

Hailiang Wu ◽

...

Keyword(s):

Electron Microscopy ◽

Aqueous Solutions ◽

Adsorption Capacity ◽

Surface Area ◽

Ion Concentration ◽

Bet Surface Area ◽

Chemical Compositions ◽

Ion Adsorption ◽

X Ray ◽

Wool Keratin

The treatment of wastewater containing heavy metals and the utilization of wool waste are very important for the sustainable development of textile mills. In this study, the wool keratin modified magnetite (Fe3O4) powders were fabricated by using wool waste via a co-precipitation technique for removal of Cu2+ ions from aqueous solutions. The morphology, chemical compositions, crystal structure, microstructure, magnetism properties, organic content, and specific surface area of as-fabricated powders were systematically characterized by various techniques including field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM), thermogravimetric (TG) analysis, and Brunauer–Emmett–Teller (BET) surface area analyzer. The effects of experimental parameters such as the volume of wool keratin hydrolysate, the dosage of powder, the initial Cu2+ ion concentration, and the pH value of solution on the adsorption capacity of Cu2+ ions by the powders were examined. The experimental results indicated that the Cu2+ ion adsorption performance of the wool keratin modified Fe3O4 powders exhibited much better than that of the chitosan modified ones with a maximum Cu2+ adsorption capacity of 27.4 mg/g under favorable conditions (0.05 g powders; 50 mL of 40 mg/L CuSO4; pH 5; temperature 293 K). The high adsorption capacity towards Cu2+ ions on the wool keratin modified Fe3O4 powders was primarily because of the strong surface complexation of –COOH and –NH2 functional groups of wool keratins with Cu2+ ions. The Cu2+ ion adsorption process on the wool keratin modified Fe3O4 powders followed the Temkin adsorption isotherm model and the intraparticle diffusion and pseudo-second-order adsorption kinetic models. After Cu2+ ion removal, the wool keratin modified Fe3O4 powders were easily separated using a magnet from aqueous solution and efficiently regenerated using 0.5 M ethylene diamine tetraacetic acid (EDTA)-H2SO4 eluting. The wool keratin modified Fe3O4 powders possessed good regenerative performance after five cycles. This study provided a feasible way to utilize waste wool textiles for preparing magnetic biomass-based adsorbents for the removal of heavy metal ions from aqueous solutions.

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