Purification, selection and partition coefficient of highly oxidized carbon dots in aqueous two-phase systems based on polymer-salt pairs
作者： Edgard R. Delgado , Larissa A. Alves , Rodrigo M. Verly , Leandro R. De Lemos , João P. de Mesquita
DOI: 10.1021/ACS.LANGMUIR.7B02361
关键词: Nanoparticle 、 Aqueous solution 、 Lithium sulfate 、 Carbon 、 Chemistry 、 Phase (matter) 、 Salt (chemistry) 、 Surface modification 、 Inorganic chemistry 、 Partition coefficient
摘要: In general, the methodologies for preparation of carbon dots (CDs) lead to formation nanostructures with size and surface chemistry heterogeneity. Because electronic optical properties these nanoparticles are directly associated properties, development purification selection strategies is essential. Herein, we report a systematic study spontaneous partition separation highly oxidized (OCDs) prepared by dehydration oxidation reactions cotton cellulose in aqueous two-phase systems (ATPSs) based on polymer–salt pairs. The CDs was investigated different ATPSs which effects cations anions salts, molecular mass nature polymer, tie-line length, initial pH, modification coefficient (K) were evaluated. results showed that best occurred system consisting PEO1500 + lithium sulfate water using reduced C...
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