Synthesis of a spherical carbon-TiO 2 composite as electrode material for capacitive deionization

Sun Kyung You, Jeong Jin Yang, Seongki Ahn, Soo Gil Park

研究成果: Article

抄録

Activated carbon is widely used as an electrode material for capacitive deionization. However, it has low wettability with electrolytes and a low ion-adsorption capacitance. To enhance the wettability of activated carbon, in this study, a carbon-metallic oxide composite was synthesized using poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)-block copolymer and titanium dioxide (TiO 2 ). The TiO 2 supporting material was synthesized by a sol-gel method, and activated carbon was prepared by high-temperature calcination at 550 °C in a nitrogen atmosphere. The active material containing 50 % TiO 2 exhibited the highest positive and negative capacitances of 109.5 and 121.3 F g -1 , respectively. Finally, when this material was used as a capacitive deionization electrode, the maximum ion removal rate was approximately 92 %. These results indicate that the carbon-TiO 2 composite electrode was more effective than the raw carbon electrode. In the end, we demonstrated the potential of a metallic oxide with activated carbon for desalination water treatment.

元の言語English
ページ(範囲)4683-4692
ページ数10
ジャーナルInternational Journal of Electrochemical Science
14
発行部数5
DOI
出版物ステータスPublished - 2019 1 1

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Activated carbon
Carbon
Electrodes
Composite materials
Oxides
Polyethylene glycols
Wetting
Capacitance
Ions
Propylene Glycol
Desalination
Glycols
Water treatment
Calcination
Titanium dioxide
Sol-gel process
Electrolytes
Block copolymers
Polypropylenes
Nitrogen

ASJC Scopus subject areas

  • Electrochemistry

これを引用

Synthesis of a spherical carbon-TiO 2 composite as electrode material for capacitive deionization . / You, Sun Kyung; Yang, Jeong Jin; Ahn, Seongki; Park, Soo Gil.

:: International Journal of Electrochemical Science, 巻 14, 番号 5, 01.01.2019, p. 4683-4692.

研究成果: Article

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title = "Synthesis of a spherical carbon-TiO 2 composite as electrode material for capacitive deionization",
abstract = "Activated carbon is widely used as an electrode material for capacitive deionization. However, it has low wettability with electrolytes and a low ion-adsorption capacitance. To enhance the wettability of activated carbon, in this study, a carbon-metallic oxide composite was synthesized using poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)-block copolymer and titanium dioxide (TiO 2 ). The TiO 2 supporting material was synthesized by a sol-gel method, and activated carbon was prepared by high-temperature calcination at 550 °C in a nitrogen atmosphere. The active material containing 50 {\%} TiO 2 exhibited the highest positive and negative capacitances of 109.5 and 121.3 F g -1 , respectively. Finally, when this material was used as a capacitive deionization electrode, the maximum ion removal rate was approximately 92 {\%}. These results indicate that the carbon-TiO 2 composite electrode was more effective than the raw carbon electrode. In the end, we demonstrated the potential of a metallic oxide with activated carbon for desalination water treatment.",
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AU - You, Sun Kyung

AU - Yang, Jeong Jin

AU - Ahn, Seongki

AU - Park, Soo Gil

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Activated carbon is widely used as an electrode material for capacitive deionization. However, it has low wettability with electrolytes and a low ion-adsorption capacitance. To enhance the wettability of activated carbon, in this study, a carbon-metallic oxide composite was synthesized using poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)-block copolymer and titanium dioxide (TiO 2 ). The TiO 2 supporting material was synthesized by a sol-gel method, and activated carbon was prepared by high-temperature calcination at 550 °C in a nitrogen atmosphere. The active material containing 50 % TiO 2 exhibited the highest positive and negative capacitances of 109.5 and 121.3 F g -1 , respectively. Finally, when this material was used as a capacitive deionization electrode, the maximum ion removal rate was approximately 92 %. These results indicate that the carbon-TiO 2 composite electrode was more effective than the raw carbon electrode. In the end, we demonstrated the potential of a metallic oxide with activated carbon for desalination water treatment.

AB - Activated carbon is widely used as an electrode material for capacitive deionization. However, it has low wettability with electrolytes and a low ion-adsorption capacitance. To enhance the wettability of activated carbon, in this study, a carbon-metallic oxide composite was synthesized using poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)-block copolymer and titanium dioxide (TiO 2 ). The TiO 2 supporting material was synthesized by a sol-gel method, and activated carbon was prepared by high-temperature calcination at 550 °C in a nitrogen atmosphere. The active material containing 50 % TiO 2 exhibited the highest positive and negative capacitances of 109.5 and 121.3 F g -1 , respectively. Finally, when this material was used as a capacitive deionization electrode, the maximum ion removal rate was approximately 92 %. These results indicate that the carbon-TiO 2 composite electrode was more effective than the raw carbon electrode. In the end, we demonstrated the potential of a metallic oxide with activated carbon for desalination water treatment.

KW - Capacitive deionization

KW - Carbon-TiO composite

KW - TiO

KW - Total dissolved solids

KW - Triblock copolymer

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