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dc.contributor.authorAdorna Jr, Joemeren_US
dc.contributor.authorBorines, Myraen_US
dc.contributor.authorVan Dien Dangen_US
dc.contributor.authorDoong, Ruey-Anen_US
dc.date.accessioned2020-10-05T02:01:55Z-
dc.date.available2020-10-05T02:01:55Z-
dc.date.issued2020-10-15en_US
dc.identifier.issn0011-9164en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.desal.2020.114602en_US
dc.identifier.urihttp://hdl.handle.net/11536/155347-
dc.description.abstractIn this study, a Faradaic/electric double-layer hybrid capacitor using coconut shell derived activated biochar (AB) and MnO2 nanocomposite was fabricated for capacitive deionization (CDI) applications. Three different co-precipitation methods including indirect, direct, and acid-assisted grafting oxidation methods were explored to produce the AB-MnO2 nanocomposites. The alpha-MnO2 with an excellent ion intercalation ability was successfully deposited onto the AB, making the AB-MnO2 an excellent electrode material for CDI application in the presence of neutral Na2SO4 electrolytes. Notably, the AB-MnO2 nanocomposites prepared by indirect co-precipitation method (AB-MnO2-indirect) has shown a high specific surface area of 304 m(2) g(-1) with high mesopore volume ratio, high capacitance retention, good hydrophilicity and suitable pore texture to shorten the diffusion distance of ions. Cyclic voltammetric (CV) and electrochemical impedance spectroscopic (EIS) spectra showed that the AB-MnO2 yields a quasi-rectangular and symmetric CV plot, and specific capacitances of 410-523 F g(-1) at 5 mV s(-1) were observed. Moreover, the AB-MnO(2 )indirect exhibits excellent CDI performance at 1.2 V, and the specific electrosorption capacity of 33.9-68.4 mg g was obtained. Results of this study demonstrate that AB-MnO2 nanocomposites are superior electrochemical materials for CDI application, which can serve as alternative materials for designing an innovative electrochemical technology for water purification, desalination, and energy storage.en_US
dc.language.isoen_USen_US
dc.subjectCapacitive deionizationen_US
dc.subjectActivated biochar (AB)en_US
dc.subjectManganese dioxide (MnO2)en_US
dc.subjectSpecific electrosorption capacity (SEC)en_US
dc.subjectElectric double layer capacitor (EDLC)en_US
dc.subjectFaradaic capacitanceen_US
dc.titleCoconut shell derived activated biochar-manganese dioxide nanocomposites for high performance capacitive deionizationen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.desal.2020.114602en_US
dc.identifier.journalDESALINATIONen_US
dc.citation.volume492en_US
dc.citation.spage0en_US
dc.citation.epage0en_US
dc.contributor.department環境工程研究所zh_TW
dc.contributor.departmentInstitute of Environmental Engineeringen_US
dc.identifier.wosnumberWOS:000566738400013en_US
dc.citation.woscount0en_US
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