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Title: Plasma Treated Active Carbon for Capacitive Deionization of Saline Water

The plasma treatment on commercial active carbon (AC) was carried out in a capacitively coupled plasma system using Ar + 10% O 2at pressure of 4.0 Torr. The RF plasma power ranged from 50 W to 100 W and the processing time was 10 min. The carbon film electrode was fabricated by electrophoretic deposition. Micro-Raman spectroscopy revealed the highly increased disorder of sp 2C lattice for the AC treated at 75 W. An electrosorption capacity of 6.15 mg/g was recorded for the carbon treated at 75 W in a 0.1 mM NaCl solution when 1.5 V was applied for 5 hours, while the capacity of the untreated AC was 1.0 mg/g. The plasma treatment led to 5.09 times increase in the absorption capacity. The jump of electrosorption capacity by plasma treatment was consistent with the Raman spectra and electrochemical double layer capacitance. This work demonstrated that plasma treatment was a potentially efficient approach to activating biochar to serve as electrode material for capacitive deionization (CDI).
Authors:
ORCiD logo [1] ; ORCiD logo [2] ;  [2] ;  [3] ;  [3] ; ORCiD logo [2]
  1. Univ. of Aveiro (Portugal). Centre for Mechanical Technology and Automation, Department of Mechanical Engineering; Michigan State Univ., East Lansing, MI (United States). Dept. of Electrical and Computer Engineering and Dept. of Chemical Engineering and Materials Science
  2. Michigan State Univ., East Lansing, MI (United States). Dept. of Electrical and Computer Engineering and Dept. of Chemical Engineering and Materials Science
  3. Univ. of Aveiro (Portugal). Centre for Mechanical Technology and Automation, Department of Mechanical Engineering
Publication Date:
Grant/Contract Number:
FG36-08GO88073
Type:
Accepted Manuscript
Journal Name:
Journal of Nanomaterials
Additional Journal Information:
Journal Volume: 2017; Journal ID: ISSN 1687-4110
Publisher:
Hindawi
Research Org:
South Dakota State Univ., Brookings, SD (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY
OSTI Identifier:
1393874