https://scholars.lib.ntu.edu.tw/handle/123456789/625511
標題: | Nickel hexacyanoferrate incorporated with reduced graphene oxide for highly efficient intercalation desalination | 作者: | Cuong D.V CHIA-HUNG HOU |
關鍵字: | Battery desalination; Membrane capacitive deionization; Nickel hexacyanoferrate; Pseudocapacitive intercalation; Reduced graphene | 公開日期: | 2022 | 卷: | 295 | 來源出版物: | Separation and Purification Technology | 摘要: | In this study, nickel hexacyanoferrate (NiHCF) was incorporated with reduced graphene oxide (rGO) as a pseudocapacitive intercalation cathode in asymmetric capacitive deionization (ACDI) for desalination. The electrochemical characterization results demonstrated that the NiHCF@rGO nanocomposite exhibited an excellent specific capacitance of 158.2 F g−1 at a scan rate of 5 mV s−1 and high electrical conductivity. The desalination experiments were carried out in single-pass mode for the performance analysis under different operational parameters. For desalting 4 g L−1 NaCl solution at 1.2 V, NiHCF@rGO-assembled ACDI exhibited a large salt adsorption capacity of 80.2 mg g−1 and a high charge efficiency of 86.6%, associated with an energy consumption of 0.053 kWh m−3. It is noted that the NiHCF@rGO-assembled ACDI significantly outperformed the activated carbon-based membrane capacitive deionization for desalination. More importantly, the incorporation of rGO can improve the 27.7% salt adsorption capacity of NiHCF. The significant improvement can be ascribed to rGO uniformly distributing NiHCF particles on its surface via conductive bridges, which enable a low charge transfer resistance and facilitate the transport of ions. The X-ray photoelectron spectroscopy analysis further verified the Na+ intercalation/deintercalation of the NiHCF@rGO electrode, accompanied by the Fe3+ to Fe2+ redox reaction in a cyclic charging–discharging process. Overall, this work demonstrates the great potential of NiHCF@rGO as a cathode for efficiently improving desalination performance. © 2022 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131077801&doi=10.1016%2fj.seppur.2022.121351&partnerID=40&md5=7f7980f7e08d8e1cb41298509ceebb7c https://scholars.lib.ntu.edu.tw/handle/123456789/625511 |
ISSN: | 13835866 | DOI: | 10.1016/j.seppur.2022.121351 | SDG/關鍵字: | Activated carbon; Cathodes; Charge transfer; Desalination; Energy utilization; Nickel compounds; Redox reactions; Sodium chloride; X ray photoelectron spectroscopy; Adsorption capacities; Battery desalination; Capacitive deionization; Intercalation cathodes; Membrane capacitive deionization; Nickel hexacyanoferrate; Pseudocapacitive; Pseudocapacitive intercalation; Reduced graphene; Reduced graphene oxides; Graphene |
顯示於: | 環境工程學研究所 |
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