Development of novel MnO2/nanoporous carbon composite electrodes in capacitive deionization technology

Yang, Juan; Zou, Linda; Song, Huaihe; Hao, Zhengping

doi:10.1016/j.desal.2011.03.044

Cited by 166 publications

(75 citation statements)

References 29 publications

(40 reference statements)

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“…The specific capacitance (C, F/g) was calculated according to the following equation (Eq. (1)) [11,21]:…”

Section: Electrochemical Evaluationmentioning

confidence: 99%

“…Recently, some researchers [11,27] synthesized MnO 2 /nanoporous carbon and MnO 2 /graphene composites and successfully used them as electrodes in electrosorptive desalination. However, no previous study has combined the two properties and used MnO 2 /carbon composite materials as electrodes to remove metal ions through the electrosorption process.…”

Section: Introductionmentioning

confidence: 99%

“…The working principle of electrosorption is similar to that of an electrochemical capacitor. It has been believed that the physical properties and structure of the electrode materials dominate their electrosorptive performance [10,11]. Various forms of carbon are the most widely used electrode materials for electrosorption technology [5,10,12] and electrochemical capacitors [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of a manganese dioxide/carbon fiber electrode for electrosorptive removal of copper ions from water

Liu

Lan

et al. 2015

Journal of Colloid and Interface Science

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a b s t r a c tMnO 2 is an effective adsorbent for many metal ions and a promising electrode material for electrochemical supercapacitors. In this paper, we successfully combined the two functions through preparing a MnO 2 /carbon fiber (CF) composite as an electrosorptive electrode. The thin MnO 2 film was deposited onto CF by an anodic eletrodeposition method. The MnO 2 /CF electrodes had ideal pseudocapacitive behavior and high capacitive reversibility. The specific capacitance of the MnO 2 /CF electrode reached a maximum value of 387 F/g, which is quite competitive compared with literature values. At 0.8 V applied potential, the maximum Cu 2+ adsorption capacity of the MnO 2 /CF electrode was 172.88 mg/g, which is more than 2 times higher than common MnO 2 adsorbents without an electric field imposed. SEM images showed that MnO 2 nanoflowers with several ''petals'' were uniformly distributed on the CF surface. Enhancement of adsorption by the polarization potential and the unique microstructure of the deposited MnO 2 may be the source of the outstanding adsorption ability of the MnO 2 /CF electrode. The MnO 2 /CF electrode could be regenerated quickly by reversing the voltage. The deposition time of 1000 s was optimum for achieving maximum capacitance and Cu 2+ removal performance. The MnO 2 /CF composite electrosorptive electrode is a promising candidate for Cu 2+ removal from aqueous solution.

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“…The specific capacitance (C, F/g) was calculated according to the following equation (Eq. (1)) [11,21]:…”

Section: Electrochemical Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of a manganese dioxide/carbon fiber electrode for electrosorptive removal of copper ions from water

Liu

Lan

et al. 2015

Journal of Colloid and Interface Science

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“…Adsorption of ions on to electrode surface during the introduction of electrical potential is a basic concept of CDI [3]. The electrosorption is a process in which a known potential is applied to an electrode of an electrochemical cell.…”

Section: Introductionmentioning

confidence: 99%

Effect of Chemically Treated / Untreated Carbon Cloth: Potential Use as Electrode Materials in the Capacitive Deionization Process of Desalination of Aqueous Salt Solution

Thamilselvan

Nesaraj

Noel

et al. 2015

Journal of Electrochemical Science and Technology

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Capacitive deionization (CDI) process is a novel approach for desalination of an aqueous salt solution. In the present study, an activated carbon cloth (ACC) is proposed as effective electrode material. Initially the carbon cloth was activated in 1 M and 8 M HNO 3 for 9 hours at room temperature. The untreated and chemically activated carbon cloth (ACC) electrode materials were subjected to BET surface area measurements in order to get information about their specific surface area, average pore size, total pore volume and micropore area. The above materials were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) also. The electrochemical studies for the electrodes were done using cyclic voltammetry (CV) in 0.1 M Na 2 SO 4 medium. From the studies, it was found that resistivity of the activated carbon cloth electrodes (treated in 1 M and 8 M HNO 3 ) was decreased significantly by the chemical oxidation in nitric acid at room temperature and its capacitance was found to be 90 F/g (1 M HNO 3 ) and 154 F/g (8 M HNO 3 ) respectively in 0.1 M Na 2 SO 4 solution. The capacitive deionization behavior of a single cell CDI with activated carbon cloth electrodes was also studied and reported in this work.

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“…Carbon materials such as activated carbon (AC) and its composites [10,11], activated carbon cloth (ACC), carbon aerogel [12,13], carbon nanotubes (CNT) and its carbon nanofiber (CNF) composites [14], and ordered and mesoporous carbon (OMC) [8,15] have been studied as electrode materials for CDI. Recently, because of their distinct characteristics, graphene [16] and its composites [3,[17][18][19] have been used by some researchers as effective electrodes for CDI and have yielded better results than other carbonaceous materials.…”

Section: Introductionmentioning

confidence: 99%

Development of Cd-doped Co Nanoparticles Encapsulated in Graphite Shell as Novel Electrode Material for the Capacitive Deionization Technology

et al. 2013

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Because of the low energy requirement and the environmentally safe byproducts, the capacitive deionization water desalination technology has attracted the attention of many researchers. The important requirements for electrode materials are good electrical conductivity, high surface area, good chemical stability and high specific capacitance. In this study, metallic nanoparticles that are encapsulated in a graphite shell (Cd-doped Co/C NPs) are introduced as the new electrode material for the capacitive deionization process because they have higher specific capacitance than the pristine carbonaceous materials. Cd-doped Co/C NPs perform better than graphene and the activated carbon. The introduced nanoparticles were synthesized using a simple sol-gel technique. A typical sol-gel composed of cadmium acetate, cobalt acetate and poly(vinyl alcohol) was prepared based on the polycondensation property of the acetates. The physiochemical characterizations that were used confirmed that the drying, grinding and calcination in an Ar atmosphere of the prepared gel produced the Cd-doped Co nanoparticles, which were encapsulated in a thin graphite layer. Overall, the present study suggests a new method to effectively use the encapsulated bimetallic nanostructures in the capacitive deionization technology.

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Development of novel MnO2/nanoporous carbon composite electrodes in capacitive deionization technology

Cited by 166 publications

References 29 publications

Preparation of a manganese dioxide/carbon fiber electrode for electrosorptive removal of copper ions from water

Preparation of a manganese dioxide/carbon fiber electrode for electrosorptive removal of copper ions from water

Effect of Chemically Treated / Untreated Carbon Cloth: Potential Use as Electrode Materials in the Capacitive Deionization Process of Desalination of Aqueous Salt Solution

Development of Cd-doped Co Nanoparticles Encapsulated in Graphite Shell as Novel Electrode Material for the Capacitive Deionization Technology

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