scholarly journals Prussian Blue Analogues of A2[Fe(CN)6] (A: Cu2+, Co2+, and Ni2+) and Their Composition-Dependent Sorption Performances towards Cs+, Sr2+, and Co2+

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Lan Ha Thi Le ◽  
Son An Nguyen ◽  
Trung Dinh Nguyen ◽  
Van Cam Thi Le ◽  
Hai Van Cao ◽  
...  
Keyword(s):  
Prussian Blue ◽  
Exchange Capacity ◽  
Contaminant Removal ◽  
Nuclear Accidents ◽  
Sorption Mechanism ◽  
Spectroscopy Analysis ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Prussian Blue Analogues ◽  
Cs Ions

Investigation in radioactive contaminant removal from aqueous solutions has been considered essential upon unexpected nuclear accidents. In this report, we have successfully prepared Prussian blue analogues (PBAs) with different substituted cations (A2[Fe(CN)6] (A: Cu2+, Co2+, and Ni2+)). The synthesized PBAs were characterized and employed for the removal of Cs+, Sr2+, and Co2+ as sorption models, which are commonly found in radioactive waste. Sorption examinations reveal that Cu2[Fe(CN)6] has the highest sorption capacity towards Cs+, Sr2+, and Co2+ compared with those of Co2[Fe(CN)6] and Ni2[Fe(CN)6]. This is mainly attributed to the cation-exchange ability of substituted metal within the framework of PBAs. The sorption mechanism is qualitatively and quantitatively supported by infrared spectroscopy (IR) and total reflection X-ray fluorescence spectroscopy analysis (TXRF). In addition, it was found that Cs+ is adsorbed most effectively by PBAs due to the size matching between Cs+ ions and the channel windows of PBAs. These findings are important for the design of sorbents with suitable ion-exchange capacity and selectivity toward targeted radioactive wastes.

The Synthesis and Ion-Exchange Property of Inorganic Material Mg1.5Mn0.5Ti0.75O4

2012 ◽  
Vol 511 ◽  
pp. 105-108
Author(s):  
Jin He Jiang
Keyword(s):  
Ion Exchange ◽  
Inorganic Material ◽  
Exchange Capacity ◽  
Exchange Property ◽  
Insertion Reaction ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Thermal Crystallization ◽  
Crystallization Method ◽  
Saturation Capacity

Mg1.5Mn0.5Ti0.75O4 was prepared by a coprecipitation/thermal crystallization method. The extraction/insertion reaction with this material was investigation by X-ray, saturation capacity of exchange, and Kd measurement. The acid treatments of Mg1.5Mn0.5Ti0.75O4 caused Mg2+ extractions of more than 72%, while the dissolutions of Mn4+ and Ti4+ were less than 8.2%. The results showed that the Li+ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 10.6mmol/g for Li+.

In situ XRF analysis of Cs adsorption by the precipitation bands of Prussian blue analogues formed in agarose gels

2019 ◽  
Vol 34 (5) ◽  
pp. 979-985 ◽  
Author(s):  
Hisashi Hayashi ◽  
Yui Sato ◽  
Saya Aoki ◽  
Mao Takaishi
Keyword(s):  
Prussian Blue ◽  
Agarose Gel ◽  
X Ray ◽  
Agarose Gels ◽  
Xrf Analysis ◽  
Prussian Blue Analogues ◽  
Xrf Spectroscopy

The measurement of Cs adsorption by the precipitation bands of Mn-based Prussian blue analogues (PBAs), Co-based PBAs, and Prussian blue (PB), which were spontaneously formed in agarose gel, was carried out using in situ X-ray fluorescence (XRF) spectroscopy.

Ion exchange of H+/Na+ in polyantimonic acid, doped with vanadium ions

2020 ◽  
Vol 92 (3) ◽  
pp. 505-514
Author(s):  
Liliya Yu. Kovalenko ◽  
Vladimir A. Burmistrov ◽  
Yuliya A. Lupitskaya ◽  
Fedor A. Yaroshenko ◽  
Elena M. Filonenko ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Exchange Capacity ◽  
Unit Cell ◽  
Ion Exchange Capacity ◽  
Solid Solution Formation ◽  
X Ray ◽  
Polyantimonic Acid ◽  
Section Size ◽  
Pyrochlore Type ◽  
Vanadium Ions

AbstractThe influence of doping of polyantimonic acid with vanadium ions on the ion exchange H+/Na+ kinetics is determined. With the help of the X-ray analysis it is shown that doped compounds H2Sb2-xVxO6-δ  · nH2O, where x = 0.14; 0.36; 0.48 have the pyrochlore-type structure. With the increase of the amount of vanadium in a sample there is a decrease of a unit cell parameter. It is determined that there is a reduction of a unit cell frame, formed by antimonic and vanadium ions, and a size reduction of hexagonal cavities, in which protons are located. It is shown that during the ion exchange of H+/Na+ there is a change of the unit cell plane without a symmetry breaking of a crystal structure, which demonstrates solid solution formation. With the increase of the amount of vanadium in the sample there is a decrease of the ion-exchange capacity, which is connected with the decrease of the channel’s section size. The ion exchange H+/Na+ kinetics has been studied with the approximation of the Boyd’s model for the intergrain diffusion. Diffusion coefficients had the order 10−13 m2/s and decreased with the increase of the amount of vanadium in the sample.

scholarly journals Synchrotron-Radiation X-Ray Investigation of Li+/Na+Intercalation into Prussian Blue Analogues

2013 ◽  
Vol 2013 ◽  
pp. 1-17 ◽  
Author(s):  
Yutaka Moritomo ◽  
Masamitsu Takachi ◽  
Yutaro Kurihara ◽  
Tomoyuki Matsuda
Keyword(s):  
Synchrotron Radiation ◽  
Prussian Blue ◽  
Cathode Materials ◽  
Structural Investigation ◽  
Lithium Ion ◽  
X Ray ◽  
Prussian Blue Analogues ◽  
The Stability ◽  
X Ray Absorption ◽  
Discharge Curves

Prussian blue analogies (PBAs) are promising cathode materials for lithium ion (LIB) and sodium ion (SIB) secondary batteries, reflecting their covalent and nanoporous host structure. With use of synchrotron-radiation (SR) X-ray source, we investigated the structural and electronic responses of the host framework of PBAs against Li+and Na+intercalation by means of the X-ray powder diffraction (XRD) and X-ray absorption spectroscopy (XAS). The structural investigation reveals a robust nature of the host framework against Li+and Na+intercalation, which is advantageous for the stability and lifetime of the batteries. The spectroscopic investigation identifies the redox processes in respective plateaus in the discharge curves. We further compare these characteristics with those of the conventional cathode materials, such as, LiCoO2, LiFePO4, and LiMn2O4.

Study of the Li-Insertion-Extraction Process in Li3Mn0.5Ti0.25O3

2012 ◽  
Vol 178-181 ◽  
pp. 467-470
Author(s):  
Jin He Jiang
Keyword(s):  
Solid State ◽  
Extraction Process ◽  
Exchange Capacity ◽  
Insertion Reaction ◽  
Inverse Spinel ◽  
Spinel Type ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Crystallization Method ◽  
Saturation Capacity

Compound [Li3Mn0.5Ti0.25O3] was prepared by a solid state reaction crystallization method. It was an inverse spinel-type metal compound. The extraction/insertion reaction with this material was investigated by X-ray, saturation capacity of exchange, and Kd measurement. The acid treated samples had an ion exchange capacity of 9.7mmol/g for Li+.

The Synthesis and Ion-Exchange Property of Li+ Memorized Inverse Spinel Mg2Ti0.5(PO4)2

2012 ◽  
Vol 512-515 ◽  
pp. 1014-1017
Author(s):  
Jin He Jiang
Keyword(s):  
Ion Exchange ◽  
Exchange Capacity ◽  
Exchange Property ◽  
Inverse Spinel ◽  
Spinel Type ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Crystallization Method ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

A inverse spinel-type metal compound [Mg2Ti0.5(PO4)2], was prepared by a solid state reaction crystallization method. The Li+extraction/insertion with this material were investigated by X-ray, FT-IR spectroscopy, and Kd measurement, The acid treated samples had an ion exchange capacity of 8.7mmol/g for Li+. It had a memorial ion-sieve property for Li+.

Property of LiMn0.5Ti0.75O3 Type Ion-Exchangers and Extraction for Lithium

2012 ◽  
Vol 549 ◽  
pp. 118-121
Author(s):  
Jin He Jiang
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Solid State Reaction ◽  
Exchange Capacity ◽  
Exchange Mechanism ◽  
Metal Compound ◽  
Spinel Type ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Crystallization Method

A spinel-type metal compound [LiMn0.5Ti0.75O3], was prepared by a solid state reaction crystallization method. The Li+ extraction/insertion with this material were investigated by X-ray and Kd measurement. The results showed that the Li+ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 4.2mmol/g for Li+.

scholarly journals Metal-to-ligand and ligand-to-metal charge transfer in thin films of Prussian blue analogues investigated by X-ray absorption spectroscopy

2008 ◽  
Vol 10 (38) ◽  
pp. 5882 ◽  
Author(s):  
Sébastien Bonhommeau ◽  
Niko Pontius ◽  
Saioa Cobo ◽  
Lionel Salmon ◽  
Frank M. F. de Groot ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Transfer ◽  
Prussian Blue ◽  
Absorption Spectroscopy ◽  
Metal Charge ◽  
X Ray ◽  
Prussian Blue Analogues ◽  
X Ray Absorption ◽  
Metal Charge Transfer

scholarly journals ADSORPTION OF Ca(II), Pb(II) AND Ag(I) ON SULFONATO-SILICA HYBRID PREPARED FROM RICE HULL ASH

2011 ◽  
Vol 11 (3) ◽  
pp. 273-278 ◽  
Author(s):  
Siti Sulastri ◽  
Nuryono Nuryono ◽  
Indriana Kartini ◽  
Eko Sri Kunarti
Keyword(s):  
Aqueous Solution ◽  
Ion Exchange ◽  
Functional Group ◽  
Sodium Hydroxide Solution ◽  
Exchange Capacity ◽  
Rice Hull ◽  
Rice Hull Ash ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Silica Hybrid

In this research, adsorption of Ca(II), Pb(II) and Ag(I) in aqueous solution onto sulfonato-silica hybrid (SSH) prepared from rice hull ash (RHA) has been studied. The preparation of SSH adsorbent was carried out by oxidation of mercapto-silica hybrid (MSH) with hydrogen peroxide (H2O2) solution 33%. MSH was prepared, via sol-gel process, by adding 3 M hydrochloric acid solution to mixture of sodium silicate (Na2SiO3) solution and 3(trimethoxysilyl)-1-propanthiol (MPTS) to reach pH of 7.0. Solution of Na2SiO3 was generated from destruction of RHA with sodium hydroxide solution followed with heating at 500 °C for 30 min. The SSH produced was characterized with Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) analyzer, energy dispersive X-ray (EDX) spectroscopy and determination of ion-exchange capacity for sodium ion (Na+). The adsorption of Ag(I) and Ca(II) were conducted in a batch system in various concentrations for one hour. The adsorbent ion was calculated based on difference of concentrations before and after adsorption process determined using atomic absorbance spectrophotometric (AAS) method. The adsorption character was evaluated using model of isotherm Langmuir and Freundlich adsorption to calculate the capacity, constants and energy of adsorption. Result of characterization by EDX and FTIR showed qualitatively that SSH has been successfully synthesized which were indicated by appearance of characteristic absorbance of functional group namely silanol (Si-OH), siloxane (Si-O-Si), methylene (-CH2-) and disappearance of mercapto group (SH). The XRD data showed amorphous structure of SSH, similar to silica gel (SG) and MSH. The study of adsorption thermodynamics showed that oxidation of MSH into SSH increases the ion-exchange capacity for Na+ from 0.123 to 0.575 mmol/g. The change in functional group from silanol to mercapto and from mercapto to sulfonato increases the adsorption capacity of Ca(II). However, the capacity order of adsorbents for both ions of Pb(II) and Ag(I) in aqueous solution is MSH > SG > SSH.

scholarly journals Detailing the Self-Discharge of a Cathode Based on a Prussian Blue Analogue

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 4027
Author(s):  
Elisa Musella ◽  
Angelo Mullaliu ◽  
Thomas Ruf ◽  
Paula Huth ◽  
Domenica Tonelli ◽  
...  
Keyword(s):  
Prussian Blue ◽  
Photoelectron Spectroscopy ◽  
Degradation Products ◽  
Redox System ◽  
The Self ◽  
Chemical Information ◽  
Discharge Process ◽  
X Ray ◽  
Electrode Surfaces ◽  
Prussian Blue Analogues

Prussian Blue analogues (PBAs) are a promising class of electrode active materials for batteries. Among them, copper nitroprusside, Cu[Fe(CN)5NO], has recently been investigated for its peculiar redox system, which also involves the nitrosyl ligand as a non-innocent ligand, in addition to the electroactivity of the metal sites, Cu and Fe. This paper studies the dynamics of the electrode, employing surface sensitive X-ray Photoelectron spectroscopy (XPS) and bulk sensitive X-ray absorption spectroscopy (XAS) techniques. XPS provided chemical information on the layers formed on electrode surfaces following the self-discharge process of the cathode material in the presence of the electrolyte. These layers consist mainly of electrolyte degradation products, such as LiF, LixPOyFz and LixPFy. Moreover, as evidenced by XAS and XPS, reduction at both metal sites takes place in the bulk and in the surface of the material, clearly evidencing that a self-discharge process is occurring. We observed faster processes and higher amounts of reduced species and decomposition products in the case of samples with a higher amount of coordination water.

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