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Synthesis of Titanium Carbide Mxene-Carbonaceous Material Composite as Capacitive Deionization Electrode for Water Desalination

Zargar, Ali | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55964 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Khachatourian, Adrineh Malek
  7. Abstract:
  8. Capacitive deionization (CDI) is a suitable method for water desalination with low energy consumption and high efficiency, which does not have secondary pollution and is environmentally friendly. The hybrid capacitive deionization uses a faradaic electrode next to the carbonaceous electrode, taking advantage of both electrodes, and high capacities have also been reported. Titanium carbide Mxene is an important candidate in CDI due to its high electrical conductivity and tunable interlayer distance, but Mxene suffers from low oxidation resistance. Therefore, in this research, molybdenum disulfide (MoS2) that is an essential member of the 2D transition metal dichalcogenides family, was used as a pillar into the Mxene structure, which not only prevents the oxidation of Mxene but also improves the specific surface area and increases the active sites for the absorption of sodium ions. In addition, using ammonium bicarbonate guest ion improved the electrical and electrochemical properties of molybdenum disulfide. Further, with the addition of carbon nanotubes (CNT) to the above two-dimensional materials, the uniformity of the structure is improved, and the electrical conductivity of the modified structure increased due to the formation of a three-dimensionally conductive network, which ultimately led to an increase in the desalination capacity and the desalination rate of the system. Finally, the desalination capacity of 56 mg/g was recorded at 1.2 V cell voltage utilizing Mxene- MoS2-CNT composite as a cathode and Activated carbon as an anode
  9. Keywords:
  10. Capacitive Deionization ; Molybdenum Desulfide ; Carbon Nanotubes ; Absorptive Capacity ; Desalination ; Hetero Structure ; Titanium Carbide Mxene Composite ; Two Phase Molybdenum Desulfide ; Water Treatment

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