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Highlights: [•] Graphene oxide-embedded electrospun porous carbon nanofiber webs were prepared. [•] GO-PCNF had higher mesopore ratio and electrical conductivity due to GO embedment. [•] GO-PCNF electrode exhibited better capacitive deionization performance than PCNF. [ABSTRACT FROM AUTHOR]

Highlights: [•] Activated electrospun carbon nanofibers were oxidized by acid treatment. [•] Surface polarity of nanofibers increased with surface oxygen content increasing. [•] Enhanced surface polarity led to higher water adsorption capacities on nanofibers. [•] Surface oxidation improved the adsorption tendency for butanone over benzene. [Copyright &y& Elsevier]

The hierarchical porous carbon materials coupled with graphene nanosheets were prepared by simple carbonizing hybrid of auricularia and graphene oxide with the following KOH activation. It is found that the porous carbon materials prepared via hydrothermal carbonization process possess a preferable pore structure compared with that prepared via calcining carbonization process. As such, the resultant porous carbon exhibits a high surface area of 1401 m 2  g −1 with a high proportion of mesoporosity (20.6%). More importantly, when used as electrode materials for capacitive deionization (CDI), such kind of porous carbon material shows a high electrosorption capacity of 7.74 mg g −1 . [ABSTRACT FROM AUTHOR]