0000000000725177

AUTHOR

Xiao Du

showing 3 related works from this author

Specific separation and recovery of phosphate anions by a novel NiFe-LDH/rGO hybrid film based on electroactivity-variable valence

2022

Phosphorus is a non-renewable resource. Supplies are limited and much phosphorus is currently wasted during the production and utilization process, causing concerns about future supplies and widespread environmental problems. To solve these problems, a new type of NiFe-LDH/rGO electrically switched ion-selective (ESIX) film is designed, based on the dominant mechanism of inner-sphere complexation. An ESIX process allows the NiFe-LDH/rGO hybrid film to achieve a controllably selective uptake and release of the phosphate anions. This route involves tuning potential steps to regulate the redox states of the composite film and the variable metal (e.g., Ni, Fe (II)/(III)) in coordination centers…

Adsorption capacityPhosphorusInner-sphere complexationSettore ING-IND/27 - Chimica Industriale E TecnologicaPhosphatesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsBiomaterialsColloid and Surface ChemistryValence state transitionSelective extractionMetalsLayered double hydroxideHydroxidesGraphitePhosphate anion
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A scalable three-dimensional porous λ-MnO2/rGO/Ca-alginate composite electroactive film with potential-responsive ion-pumping effect for selective re…

2021

Abstract A scalable three-dimensional (3D) porous composite electroactive film consisting of λ-MnO2, reduced graphene oxide (rGO) and calcium alginate (Ca-alg) was successfully fabricated and employed for the selective extraction of Li+ ions with low concentration via an electrochemically switched ion exchange (ESIX) technology. The Li+ ion adsorption capacity of the obtained λ-MnO2/rGO/Ca-alg composite electroactive film reached as high as 32.7 mg g−1 and more than 90% of its equilibrium adsorption capacity was achieved in 1 h. The λ-MnO2/rGO/Ca-alg composite electroactive film displayed evident selectivity towards Li+ ions. The separation factors for Li+/Na+ and Li+/Mg2+ reached 1040.57 a…

Materials scienceCalcium alginateIon exchangeGrapheneComposite numberOxideFiltration and Separation02 engineering and technology021001 nanoscience & nanotechnologyElectrochemistryAnalytical Chemistrylaw.inventionIonchemistry.chemical_compoundAdsorption020401 chemical engineeringchemistryChemical engineeringlaw0204 chemical engineering0210 nano-technologySeparation and Purification Technology
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Electrochemically triggered iodide-vacancy BiOI film for selective extraction of iodide ion from aqueous solutions

2021

Abstract The effective extraction and regeneration of radioactive iodide remains an urgent concern for safe nuclear energy utilization. Herein, we developed a novel electrochemically triggered iodide-vacancy BiOI film, which exhibited excellent I− ion extraction capacity of 328.3 mg·g−1. Especially, due to the ion vacancy trap effect, the film showed high selectivity towards I− ions in the existence of a large number of competitive anions. Additionally, the electrochemically switched ion extraction (ESIE) process with this iodide-vacancy BiOI film possessed fast extraction kinetics and high stability. More importantly, the trapped I− ions were easily desorbed from the film without the secon…

chemistry.chemical_classificationAqueous solutionChemistryExtraction (chemistry)KineticsHigh selectivityInorganic chemistryIodideFiltration and Separation02 engineering and technologySettore ING-IND/27 - Chimica Industriale E Tecnologica021001 nanoscience & nanotechnologyIodide ions Iodide-vacancy BiOI film Electrochemically switched ion extraction Selective extraction Radioactive waterAnalytical ChemistryIonIodide ion020401 chemical engineeringVacancy defect0204 chemical engineering0210 nano-technology
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