A5080750465- Radioactive element chemistry and processing
- Extraction and Separation Processes
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Chemical Synthesis and Characterization
- Ionic liquids properties and applications
- Lanthanide and Transition Metal Complexes
- Analytical chemistry methods development
- Chemical Thermodynamics and Molecular Structure
- Magnetism in coordination complexes
- Nuclear Materials and Properties
- Molecular Sensors and Ion Detection
- Metal Extraction and Bioleaching
- Advanced Chemical Physics Studies
- Covalent Organic Framework Applications
- Catalysis and Oxidation Reactions
- Electrochemical Analysis and Applications
- Chemical and Physical Properties in Aqueous Solutions
- X-ray Spectroscopy and Fluorescence Analysis
- NMR spectroscopy and applications
- Nanomaterials for catalytic reactions
- Nuclear materials and radiation effects
- Machine Learning in Materials Science
- Nanofabrication and Lithography Techniques
- Crystallography and molecular interactions
Tsinghua University
2015-2024
LG Chem (South Korea)
2024
Lawrence Berkeley National Laboratory
2021
Key Laboratory of Nuclear Radiation and Nuclear Energy Technology
2015-2019
Beijing National Laboratory for Molecular Sciences
2012-2017
Peking University
2012-2017
Developing facile and robust technologies for effective enrichment of uranium from seawater is great significance resource sustainability environmental safety. By exploiting mussel-inspired polydopamine (PDA) chemistry, diverse types PDA-functionalized sorbents including magnetic nanoparticle (MNP), ordered mesoporous carbon (OMC), glass fiber carpet (GFC) were synthesized. The PDA functional layers with abundant catechol amine/imine groups provided an excellent platform binding to uranium....
The removal and separation of uranium from aqueous solutions are quite important for resource reclamation environmental protection. Being one the most effective techniques metal separation, adsorption by a variety adsorbent materials has been subject study with high interest in recent years. However, current methods monitoring process require complicated procedures tedious measurements, which hinders development processes efficient uranium. In this work, we prepared type luminescent...
Recently, phenanthroline-based ligands have received increasing attention due to their excellent separation capabilities for trivalent actinides over lanthanide. In this work, we designed a soft-hard donor combined tetradentate extractant, tetraethyl (1,10-phenanthrolin-2,9-diyl)phosphonate (C2-POPhen), the selective of Am(III) Ln(III) from HNO3 media. The solvent extraction and complexation behaviors by C2-POPhen were investigated both experimentally theoretically. could selectively extract...
The microplasma cathode could trigger and dramatically accelerate the polymerization process of dopamine for fabricating polydopamine coating films on various substrates.
The extraction of Am3+ and Eu3+ by octyl(phenyl)-N,N-diisobutyl carbamoylmethylphosphine oxide (CMPO) in eight imidazolium-based ionic liquids n-dodecane was studied compared. Slope analysis indicates that the ligand/metal ratio extracted complexes is much larger than n-dodecane. Nitric acid has different impacts on extraction, depending greatly nature liquids. A mixed-extraction mechanism, namely cation exchange plus formation neutral (solvation), proposed for liquid systems. In addition,...
The selective separation of trivalent americium from lanthanides in a nitric acid medium by tetradentate ligand, N,N′-diethyl-N,N′-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), an ionic liquid (IL), C4mimNTf2, was studied batch solvent extraction and spectroscopic approaches. effect various parameters such as the contact time, temperature, extractant concentration, acidity on Am3+ Eu3+ have been evaluated. A significant enhancement ability Et-Tol-DAPhen dissolved IL observed...
The bonding covalency between trivalent lanthanides (Ln = La, Pr, Nd, Eu, Gd) and triphenylphosphine oxide (TPPO) is studied by X-ray absorption spectra (XAS) density functional theory (DFT) calculations on the LnCl3(TPPO)3 complexes. O, P, Cl K-edge XAS for single crystals of were collected, interpreted based DFT calculations. O P showed no significant change across Ln series in complexes, unlike spectra. experimental suggest mixing 4f- 2p-orbitals indicate that amount 2p character per Ln–O...
The extraction and complexation of trivalent americium (Am) lanthanides (Ln) by four 2,9-diamide-1,10-phenanthroline (DAPhen) ligands with different alkyl substituent groups on the diamide moiety in an ionic liquid (IL), C4mimNTf2, were studied through a combination batch extraction, spectroscopic, calorimetric approaches. All DAPhen can achieve selective separation Am(III) from Eu(III), but detailed extractability kinetics are affected significantly length groups. UV–vis absorption...
5f covalency in [U(C7H7)2]- was probed with carbon K-edge X-ray absorption spectroscopy (XAS) and electronic structure theory. The results revealed U orbital participation δ-bonding both the ground- core-excited states; additional ϕ-mixing is observed states. Comparisons U(C8H8)2 show greater δ-covalency for [U(C7H7)2]-.
The development of economical and green technologies for the effective recovery palladium has attracted worldwide attention in recent years. Magnetic separation involving use functional magnetic nanoparticles (MNPs) with superparamagnetic characteristics holds great promise this respect. This study presents a novel class core-shell structured microspheres decorated polyazamacrocyclic receptors, which show highly-selective binding to Pd(ii) HNO3 media. possess high saturation magnetization...
The extraction of lanthanide series by Cyanex301, i.e., bis(2,4,4-trimethylpentyl)dithiophosphinic acid (HC301), has been modeled density functional theory calculation, taking into account the formation both inner- and outer-sphere complexes. inner-sphere complex Ln(C301)3 Ln(H2O)9(C301)3 are optimized, followed analysis interaction energy, bond length, Laplacian orders, Mulliken populations. covalency degree increases in Ln-S Ln-O bonds complexes, respectively, as is traversed. population...
Thermodynamics of Ln(<sc>iii</sc>) complexation with CMPO in “dry” and “wet” ionic liquids reflects how solvation affects the helps identify extractive species involved solvent extraction.
Complexation of trivalent lanthanides with a sulfur-bearing ligand, bis(2,4,4-trimethylpentyl) dithiophosphinate, was studied in ethanol under identical conditions by optical spectroscopy, microcalorimetry, luminescence lifetime measurement, and extended X-ray absorption fine structure (EXAFS). Three successive complexes, LnL2+, LnL3, where Ln L denote the lanthanide dithiophosphinate respectively, formed solution. In contrast to general findings that heavier form stronger complexes due...
The complexation of U(VI) with octylphenyl-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO, denoted as L) in ionic liquid (IL) C4mimNTf2 was investigated by UV-vis absorption spectrophotometry and isothermal titration calorimetry. Spectro-photometric suggests that three successive complexes, UO2Lj2+ (j = 1-3), formed both "dry" (water content < 250 ppm) "wet" ≈ 12 500 liquid. However, the thermodynamic parameters are distinctly different two ILs. In dry IL, strength between CMPO is much...
A calixcrown extraction process using bis(2-propyloxy)calix[4]-crown-6 (iPr-C[4]C-6) as extractant and n-octanol diluent for the separation of cesium from Chinese High Level Liquid Waste (HLLW) has been developed at INET. HLLW is acidic defense waste with high salt content, which now stored in underground stainless steel tanks. The intention to use a extract conducted on multistage 20-mm-diameter annular centrifugal contactors (ACCs), so it necessary study hydraulic mass-transfer performance...
Our work describes the formation of W/O microemulsions and its effect on coordination environment Nd(<sc>iii</sc>) in extraction using purified Cyanex 301 as an extractant.
The co-extraction of strontium and cesium from nitric acid medium by di-tert-butylcyclohexano-18-crown-6 (DtBuCH18C6) 1,3-di(2-propoxy)calix[4]arene-crown-6 (iPr-C[4]C-6) in n-octanol was studied. effects contact time, concentration, extractant concentration temperature on the behavior were systematically investigated. Effective extraction two metals achieved under a variety conditions. simulated high-level liquid waste (HLLW) also conducted, could be selectively extracted presence large...