Coconut shell-derived activated carbon and carbon nanotubes composite: a promising candidate for capacitive deionization electrode

Huynh, Le Thanh Nguyen; Pham, Thi Nam; Nguyen, Thai Hoang; Le, Viet Hai; Nguyễn, Thị Thơm; Nguyen, Thi Diem Kieu; Tran, Tri; Ho, Pham Anh Vu; Co, Thanh Thien; Nguyen, Thanh Thuy; Vo, Thi Kieu Anh; Nguyen, Trung Huy; Vu, Thi Thu Ha; Luong, Mui Viet; Uyama, Hiroshi; Pham, Gia Vu; Hoàng, Thái; Tran, Dai Lam

doi:10.1016/j.synthmet.2020.116415

Cited by 39 publications

(3 citation statements)

References 58 publications

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“…In commercial scale, at present, AC was produced from the sources such as bitumen and anthracite charcoal, wood, coconut, lignite, and peat shells (Huynh et al, 2020). Biomass, one of the probable feedstocks, satisfies the required criteria.…”

Section: Significance Of Plastic-derived Carbon For Electrodesmentioning

confidence: 99%

An insight on the development of functional carbon electrodes from plastic waste for capacitive deionization towards sustainable water reclamation

Ganesan

Mohammed

Begum

2023

Water & Environment J

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Capacitive deionization (CDI) is an emerging electrochemical‐based adsorption system that has a high capability for the water reclamation with future potential towards an energy‐efficient and cost‐effective technique for industrial implementations. However, the higher cost of electrodes and poor performance limit its scale‐up, and there is a need to focus on a cost‐effective electrode towards economic impacts. Among the various waste resources, plastic sources would be the better precursor for carbonization as the plastic‐derived carbon possess enhanced surface properties and high electrochemical stability. Further, the carbonization of plastic products towards electrode minimizes greenhouse gas emissions, maintains environmental sustainability and achieves a dual benefit of circular economy with water reclamation. This paper highlights the overview of CDI, the significance of electrodes in CDI for electrosorption studies, various synthetic routes of plastic‐derived carbon, and its properties that help the researchers to focus on zero waste discharge‐based CDI process.

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Section: Significance Of Plastic-derived Carbon For Electrodesmentioning

confidence: 99%

An insight on the development of functional carbon electrodes from plastic waste for capacitive deionization towards sustainable water reclamation

Ganesan

Mohammed

Begum

2023

Water & Environment J

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“…The CDI cell consisted of a pair of parallel electrodes (5 cm × 5 cm, a thickness of 150 µm) separated by a polyamide insulating plate with a thickness of 200 µm. The negative electrode was used with modified coconut shell derived activated carbon (mAC) as negative electrode in a previous report [28] and the mass ratio of negative electrode and positive electrode (N/P) was controlled in 1.5. The feed water containing 200 ppm NaCl solution was pumped through the CDI cell at a constant rate of 10 mL min −1 .…”

Section: Electrosorption Of Naclmentioning

confidence: 99%

Fabrication of TiO₂/CNTs composite electrode with improved performance in capacitive deionization

Nguyen,

Nguyen

et al. 2023

CLEAN Soil Air Water

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Many studies have shown that capacitance deionization (CDI) has great potential in salt‐water treatment, one of the issues of great concern in many countries, especially Vietnam. The electrode material in CDI is one of the essential factors contributing to the desalination efficiency of this technology, so it is of research interest. In this study, TiO2 and TiO2/carbon nanotubes (CNTs) were synthesized from the sol‐gel process and utilized as an electrode for desalination. The composite materials were intensively characterized by X‐ray diffraction, Raman spectroscopy, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Brunauer–Emmett–Teller and thermal analysis. The electrochemical properties were investigated using electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge/discharge. The fabricated TiO2/CNTs nanocomposite electrode consisting of 1% CNTs (electrode T1) exhibited remarkable capacitance, conductivity, and durability; thus, it was employed as an electrode for desalination. With this electrode T1, the maximum salt adsorption capacity of 17.5 mg g−1, together with the highest charge efficiency of 90%, was achieved. Therefore, TiO2/CNTs can be considered a suitable electrode candidate for CDI technology.

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“…The resultant carbon exhibited ultrahigh specific surface area of 4482 m 2 /g with specific capacitance of 225 F/g and SAC of 13.5 mg/g. Huynh et al (2020) produced composite of coconut shell derived activated carbon and carbon nanotubes for CDI. The ratio of AC/CNT was compared with obtain optimized performance.…”

Section: Biomass-derived Carbonmentioning

confidence: 99%

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

Datar

Mane

Jha

2022

Water Environment Research

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Capacitive deionization is an emerging and rapidly developing electrochemical technique for water desalination across the globe with exponential growth in publications. There are various architectures and materials being explored to obtain utmost electrosorption performance. The symmetric architectures consist of the same material on both electrodes, while asymmetric architectures have electrodes loaded with different materials. Asymmetric architectures possess higher electrosorption performance as compared with that of symmetric architectures owing to the inclusion of either faradaic materials, redox‐active electrolytes, or ion specific pre‐intercalation material. With the materials perspective, faradaic materials have higher electrosorption performance than carbon‐based materials owing to the occurrence of faradaic reactions for electrosorption. Moreover, the architecture and material may be tailored in order to obtain desired selectivity of the target component and heavy metal present in feed water. In this review, we describe recent developments in architectures and materials for capacitive deionization and summarize the characteristics and salt removal performances. Further, we discuss recently reported architectures and materials for the removal of heavy metals and radioactive materials. The factors that affect the electrosorption performance including the synthesis procedure for electrode materials, incorporation of additives, operational modes, and organic foulants are further illustrated. This review concludes with several perspectives to provide directions for further development in the subject of capacitive deionization. Practitioner Points Capacitive deionization (CDI) is a rapidly developing electrochemical water desalination technique with exponential growth in publications. Faradaic materials have higher salt removal capacity (SAC) because of reversible redox reactions or ion‐intercalation processes. Combination of CDI with other techniques exhibits improved selectivity and removal of heavy metals. Operational parameters and materials properties affect SAC. In future, comprehensive experimentation is needed to have better understanding of the performance of CDI architectures and materials.

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Coconut shell-derived activated carbon and carbon nanotubes composite: a promising candidate for capacitive deionization electrode

Cited by 39 publications

References 58 publications

An insight on the development of functional carbon electrodes from plastic waste for capacitive deionization towards sustainable water reclamation

An insight on the development of functional carbon electrodes from plastic waste for capacitive deionization towards sustainable water reclamation

Fabrication of TiO₂/CNTs composite electrode with improved performance in capacitive deionization

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

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Coconut shell-derived activated carbon and carbon nanotubes composite: a promising candidate for capacitive deionization electrode

Cited by 39 publications

References 58 publications

An insight on the development of functional carbon electrodes from plastic waste for capacitive deionization towards sustainable water reclamation

An insight on the development of functional carbon electrodes from plastic waste for capacitive deionization towards sustainable water reclamation

Fabrication of TiO2/CNTs composite electrode with improved performance in capacitive deionization

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

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Product

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Fabrication of TiO₂/CNTs composite electrode with improved performance in capacitive deionization