Highly porous activated carbons from resource-recovered Leucaena leucocephala wood as capacitive deionization electrodes

Hou, Chia‐Hung; Liu, Nei-Ling; Hsi, Hsing‐Cheng

doi:10.1016/j.chemosphere.2015.06.055

Cited by 68 publications

(17 citation statements)

References 34 publications

(33 reference statements)

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“…To improve the performance of CDI and broaden the scope of its application, considerable research has been conducted on the preparation of CDI electrodes (Dong et al, 2015, Hou et al, 2015, Wimalasiri et al, 2015and Xu et al, 2015, the optimization of the operation process (Zhao et al, 2013, Cohen et al, 2015and Bian et al, 2015, the mathematical modeling of the CDI process (Kim et al 2015 andDykstra et al, 2015), membrane CDI (MCDI) (Lee et al, 2011 andLiang et al, 2013), the development of new CDI systems (Lee et al, 2014 andGao et al, 2015a), the selective removal of ions (Seo et al, 2010, Kim and Choi, 2012and Tang et al, 2015, etc. CDI is expected to become a low-cost and highly energy-efficient desalination technology in the future.…”

Section: Introductionmentioning

confidence: 99%

Surface-treated carbon electrodes with modified potential of zero charge for capacitive deionization

et al. 2016

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The potential of zero charge (Epzc) of electrodes can greatly influence the salt removal capacity, charge efficiency and cyclic stability of capacitive deionization (CDI). Thus optimizing the Epzc of CDI electrodes is of great importance. A simple strategy to negatively shift the Epzc of CDI electrodes by modifying commercial activated carbon with quaternized poly (4-vinylpyridine) (AC-QPVP) is reported in this work. The Epzc of the prepared AC-QPVP composite electrode is as negative as -0.745 V vs. Ag/AgCl. Benefiting from the optimized Epzc of electrodes, the asymmetric CDI cell which consists of the AC-QPVP electrode and a nitric acid treated activated carbon (AC-HNO3) electrode exhibits excellent CDI performance. For inverted CDI, the working potential window of the asymmetric CDI cell can reach 1.4 V, and its salt removal capacity can be as high as 9.6 mg/g. For extended voltage CDI, the salt removal capacity of the asymmetric CDI cell at 1.2/-1.2 V is 20.6 mg/g, which is comparable to that of membrane CDI using pristine activated carbon as the electrodes (19.5 mg/g). The present work provides a simple method to prepare highly positively charged CDI electrodes and may pave the way for the development of high-performance CDI cells.

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Section: Introductionmentioning

confidence: 99%

Surface-treated carbon electrodes with modified potential of zero charge for capacitive deionization

et al. 2016

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“…Based on cost and utility considerations, bio-based carbon nano materials may be the most suitable materials for CDI electrodes. Many studies have noted that bio-based carbon materials can also achieve superior performance and have verified that the bio-based carbon materials used as CDI electrodes for desalination performed well [5,[21][22][23]24,25].…”

Section: Introductionmentioning

confidence: 99%

Corncob waste activated with different pore formers for capacitive deionization (CDI) materials

Lang¹,

Hu²,

Zhao³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tAs a new desalination technology, capacitive deionization (CDI) has made continuous progress in recent years. This paper explores possible resource utilization channels for corncob waste to prepare capacitive deionized plate materials. Using corncob waste as a matrix, porous materials were prepared by high-temperature insulation from oxygen. The specific surface area of the resulting carbon material was 1,267.9 m 2 g -1 , and a capacitance of 145.5 F g -1 was achieved in a three-electrode system; the desorption capacity was 16.9 mg g, close to the performance of high-performance materials such as graphene. CDI uses low-cost and waste recycling materials. In the present study, different effects of K 2 FeO 4 and KOH as pore formers on the micro-morphology and chemical structure of the material were compared. The corncob-based carbon materials obtained from K 2 FeO 4 and KOH met the basic requirements of the capacitive deionized plate material, whereas K 2 FeO 4 increased the degree of graphitization of corncob carbon materials; the corncob-based bio char produced from the K 2 FeO 4 pores helped to shorten the time of one adsorption cycle, but the cost is slightly higher than that of the KOH hole. Under different requirements, K 2 FeO 4 and KOH are promising as pore-forming agents for corncob CDI electrodes. The cycling performance verified that the carbon materials prepared in the previous process performed well during the desorption process and recycling process, which can meet the needs of repeated use, and corncob waste is a promising resource for capacitive deionization plate materials.

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“…Leucaena leucocephala is also locally known as Petai Belalang, a tree that is originated from Central America. The Portuguese and the Dutch brought the species to Asian parts in the seventeenth century (Hou et al 2015). It is a very fast-growing tree which reaches a height of more than 6 m in only two to three years, yielding high biomass productivity at more than 50 ton ha -1 annually (Loaiza et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of alkaline-based activated carbon from Leucaena Leucocephala produced at different activation temperatures for cadmium adsorption

et al. 2020

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Heavy metal contamination in water is happening worldwide. Adsorption using activated carbon is a common choice for cleaning the wastewater. The drawback of activated carbon is the higher cost of production due to the need for high heat in the process. This work investigated on activated carbon produced from the abundantly available Leucaena leucocephala biomass in order to reduce the cost of raw material. The biomass was chemically activated at different activation temperatures. The produced activated carbon was characterized using SEM, FT-IR, surface analyzer, and TGA. Isothermic and thermodynamic studies were done to evaluate the adsorption properties of the activated carbon. It was found out that higher surface area can be obtained using the higher activation temperature. Higher NaOH to carbonized sample ratios also resulted in higher surface area for all activation temperatures, which are 662 m2g-1 for 700 °C activation temperature, 735 m2g-1 for 750 °C, and 776 m2g−1 for 800 °C. Isothermic studies showed that all of the activated carbon that is produced from Leucaena leucocephala biomass are fit to the Langmuir isotherm, regardless of any activation temperature. Lastly, the thermodynamic study found out the adsorption process is endothermic, reflected by the positive value of ΔHo. It can be concluded that Leucaena leucocephala is a promising alternative material for producing activated carbon.

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Highly porous activated carbons from resource-recovered Leucaena leucocephala wood as capacitive deionization electrodes

Cited by 68 publications

References 34 publications

Surface-treated carbon electrodes with modified potential of zero charge for capacitive deionization

Surface-treated carbon electrodes with modified potential of zero charge for capacitive deionization

Corncob waste activated with different pore formers for capacitive deionization (CDI) materials

Evaluation of alkaline-based activated carbon from Leucaena Leucocephala produced at different activation temperatures for cadmium adsorption

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