Publications by authors named "Wuqing Tao"

A new graphene oxide (GO) model with reasonable functional group types and distribution modes was proposed by integrating potentiometric titrations and ab initio calculations. Due to the complex synthesis mechanism, the atomic structure of GO has been controversial for a long time. Here, we use density functional theory calculations to mimic the oxidation process, and a series of GO fragments (GOFs) were deduced.

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  • 1,10-phenanthroline-based ligands show promise for separating trivalent actinides (Am(III)) from lanthanides (Eu(III)), but further optimization of these ligands is still needed.
  • A new ligand, QL-DAPhen, which combines quinoline with phenanthroline, effectively separates Am(III) from Eu(III) in a sodium nitrate environment, achieving separation factors between 29 and 44.
  • Coordination studies reveal that QL-DAPhen forms stable 1:1 and 1:2 complexes with Eu(III), with stronger Am-N bond characteristics, supporting the preferential bonding of the ligand to Am(III) and providing insights for future applications in metal separation
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The interlayer regulation of layered environmental adsorption materials such as two-dimensional early transition metal carbides and carbonitrides (MXenes) plays an important role in their purification performance for specific pollutants. Here the enhanced uptake of Th by multilayered titanium carbides (TiCT) through a hydrated intercalation strategy is reported. Th adsorption behaviors of three TiCT samples with different c lattice parameters were studied as a function of contact time, pH, initial concentration, temperature and ion strength in batch experiments.

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  • The study focuses on creating a new water-soluble heterocyclic ligand, DS-Ph-DAPhen, to enhance the separation of actinides (like Americium) from lanthanides (like Europium).
  • DS-Ph-DAPhen, when combined with a specific solvent, can effectively separate Am(III) from Eu(III) in various nitric acid concentrations with high selectivity.
  • Characterization techniques revealed that DS-Ph-DAPhen forms stable complexes with Europium ions, confirming its potential effectiveness in selectively isolating actinides in aqueous environments.
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  • Diglycolamide-based ligands are gaining attention for their strong affinity to trivalent actinides and lanthanides, but optimizing their structure for better extraction is still a challenge.
  • In this study, researchers developed three multidentate diglycolamide ligands to selectively separate europium (Eu(III)) from americium (Am(III)) in nitric acid solutions, discovering that adding ethyl or isopropyl groups significantly improved extraction efficiency.
  • Using various techniques like mass spectrometry and spectroscopy, they found that the metal ions formed specific complexes and confirmed that the selectivity for Eu(III) over Am(III) was superior, supported by theoretical calculations.
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Though two-dimensional early transition metal carbides and carbonitrides (MXenes) have attracted extensive interest recently, their superb abilities in various scientific applications always suffer from the very narrow interlayer space inside the multilayered structure. Here we demonstrate an unprecedented large adsorption capacity enhancement of TiCT toward radionuclide removal via a hydrated intercalation strategy. By rational control of the interlayer space, the potential for imprisoning the representative actinide U(vi) inside multilayered TiCT was also confirmed.

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Two highly symmetrical (3,4)-connected uranyl-organic frameworks (UOFs) were synthesized by a judicious combination of D -symmetrical triangular [UO (COO) ] and T symmetrical tetrahedral tetrakis(4-carboxyphenyl)methane (H MTB). These two as-synthesized UOFs possess similar structural units and coordination modes but totally different topological structures, namely ctn net and bor net. Solvent-induced interpenetration and a morphology change are observed.

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