Plasma Modification of Activated Carbon Fibers for Adsorption of SO<sub>2</sub>

Yao, Che; Zhou, Jia‐Yong; Wang, Zuwu

doi:10.1088/1009-0630/15/10/16

Cited by 22 publications

(18 citation statements)

References 22 publications

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“…Che et al. [ 65 ] treated VACFs using a dielectric‐barrier discharge (DBD) N 2 plasma to improve the adsorption capacities of SO 2 by forming strongly alkaline nitrogenated functional groups to adsorb the acidic SO 2 . The best adsorption efficiency was 21% higher than that of the unmodified VACF.…”

Section: Effect Of Discharge Gas On Cbmsmentioning

confidence: 99%

Advance in Using Plasma Technology for Modification or Fabrication of Carbon‐Based Materials and Their Applications in Environmental, Material, and Energy Fields

Sun

Bao

et al. 2020

Adv Funct Materials

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Plasma technology is an eco‐friendly way to modify or fabricate carbon‐based materials (CBMs) due to plasmas’ distinctive abilities in tuning the surface physicochemical properties by implanting functional groups or incorporating heteroatoms into the surface without changing the bulk structure. However, the mechanisms of functional groups formation on the carbon surface are still not clearly explained because of the variety of different discharge conditions and the complexity of plasma chemistry. Consequently, this paper contains a comprehensive review of plasma‐treated carbon‐based materials and their applications in environmental, materials, and energy fields. Plasma‐treated CBMs used in these fields have been significantly enhanced in recent years because these related materials possess unique features after plasma treatment, such as higher adsorption capacity, enhanced wettability, improved electrocatalytic activity, etc. Meanwhile, this paper also summarizes possible reaction routes for the generation of functional groups on CBMs. The outlook for future research is summarized, with suggestions that plasma technology research and development shall attempt to achieve precise control of plasmas to synthesize or to modify CBMs at the atomic level.

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Section: Effect Of Discharge Gas On Cbmsmentioning

confidence: 99%

Advance in Using Plasma Technology for Modification or Fabrication of Carbon‐Based Materials and Their Applications in Environmental, Material, and Energy Fields

Sun

Bao

et al. 2020

Adv Funct Materials

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“…Che et al 84 comparing nontreated and treated AC under dielectric discharge observed di®erent bands through FTIR and XPS analysis. The authors suggest adding of new atoms/structures in AC surface.…”

Section: Physical Modi¯cationmentioning

confidence: 99%

Surface Modifications of Activated Carbon and Its Impact on Application

2019

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The main and new surface modification methods of activated carbon (AC) and their influence on application (adsorption capacity) were reviewed. Adsorption capacity is an important issue, contributing to hazardous substances environment management. According to literature, it is true that surface chemistry strongly affects adsorption capacity. Surface chemistry can be modified by several methods that lead to different activated carbon properties. Furthermore, adsorbate properties, and their relationships with surface structure, can impact adsorption properties. Surface modifications can be conducted by adding some atoms to the surface structure, making the surface more acidic or basic. Introduction of oxygen and ammonia atoms (chemical modification) are the main processes to make the surface more acidic and basic, respectively, although may bring chemical wastes to environment. Surface modification is done by chemical and physical modifications that lead activated carbons to present different properties. The main and new methods of chemical and physical modifications are compared and presented in this paper. Some new physical methods, like corona treatment, plasma discharge and microwave radiation, can be applied to cause surface modifications. Corona treatment can be a practical and new way to cause surface modification on an activated carbon surface.

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“…Some authors have increased adsorption capacity due to treatment compared to virgin activated carbons (CHE et al, 2013;QU et al, 2013). However, other authors reported that electric discharge had a negative impact on adsorption capacity.…”

Section: Methylene Blue Adsorptionmentioning

confidence: 99%

“…Thus, structural modifications are dependent on the methodology of the treatment that is applied to cause modifications. Che et al (2013) …”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

“…The reduction is conditioned due to the time exposure acting on the surface, adding new surface functional groups which can be allocated to pore entrances, causing a reduction in surface area. Furthermore, surface area reduction may be caused by factors inherent to surface modifi cation, such as temperature, pressure, exposure (CHE et al, 2013).…”

Section: Estimated Surface Areamentioning

confidence: 99%

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Impact of Corona Treated Activated Carbon in Anionic and Cationic Dye Adsorption

Pego

Carvalho

Borges

et al. 2017

CERNE

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Dye degradation is a significant topic in environmental science, since dyes can bring several problems to the environment. Activated carbon (AC) is an important material used as adsorbent of these hazardous substances, but need to be improved especially into specific substances. This paper aimed to evaluate the impact of activated carbon surface modified by corona treatment (electric discharge) on adsorption of different dyes. Activated carbons were treated by corona treatment to cause surface modification, modifying exposure time to treatment (2, 5, 8 and 10 minutes). Evaluation of adsorption was performed by adsorption isotherms and kinetic adsorption. Dyes differed in their charge (anionic or cationic) and molecular weight. Dyes used were Methylene Blue (cationic) and Congo Red (anionic). Surface area and Scanning Electron Microscopy (SEM) were also conducted. Surface chemistry was impacted by corona treatment and interfered in dye adsorption. There was decrease of dye adsorption for both dyes according to time exposure. However, the decrease of Methylene Blue (25%) was higher than Congo Red (14%), suggesting that either charge or molecule weight interfere in the adsorption isotherms. In kinetic adsorption, there was no difference between treatments, although there was a difference in adsorption equilibrium. SEM showed that surface was impacted (pore destruction) by corona treatment. Furthermore, estimated surface area was strongly impacted by the treatment, reducing with the increase of time exposure. Thus, textural properties might have contributed to reduce adsorption capacity of both dyes and play a higher role than chemical properties. IMPACTO DE CARVÕES ATIVADOS TRATADOS COM DESCARGA CORONA NA ADSORÇÃO DE CORANTES CATIÔNICOS E ANIÔNICOSRESUMO: A degradação de corantes é um importante tópico nas ciências ambientais, já que os corantes podem trazer diversos problemas para o meio ambiente. O carvão ativado é um importante material usado como adsorvente dessas substâncias causadoras dos mais diversos danos, mas precisam ser melhoradas especialmente quando envolve substâncias específicas. Este manuscrito tem como objetivo avaliar o impacto da superfície de carvões ativados modificados pelo tratamento corona (descarga elétrica) na adsorção de diferentes corantes. Os carvões ativados foram tratados pelo tratamento corona para promover a modificação na superfície, modificando os tempos de exposição ao tratamento (2, 5, 8 e 10 minutos). A avaliação da adsorção foi realizada pelas isotermas de adsorção e velocidade de adsorção. Os corantes diferiram pelas suas cargas (aniônico e catiônico) e massa molecular. Os corantes utilizados foram o Azul de Metileno (catiônico) e o Vermelho Congo (aniônico).A área superficial e a microscopia eletrônica de varredura (MEV) também foram realizadas. A superfície química foi impactada pelo tratamento corona e interferiu na adsorção dos corantes. Houve decréscimo na adsorção dos corantes para ambos de acordo com o tempo de exposição. No entanto, o decréscimo de Azul de ...

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Plasma Modification of Activated Carbon Fibers for Adsorption of SO₂

Cited by 22 publications

References 22 publications

Advance in Using Plasma Technology for Modification or Fabrication of Carbon‐Based Materials and Their Applications in Environmental, Material, and Energy Fields

Advance in Using Plasma Technology for Modification or Fabrication of Carbon‐Based Materials and Their Applications in Environmental, Material, and Energy Fields

Surface Modifications of Activated Carbon and Its Impact on Application

Impact of Corona Treated Activated Carbon in Anionic and Cationic Dye Adsorption

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Plasma Modification of Activated Carbon Fibers for Adsorption of SO2

Cited by 22 publications

References 22 publications

Advance in Using Plasma Technology for Modification or Fabrication of Carbon‐Based Materials and Their Applications in Environmental, Material, and Energy Fields

Advance in Using Plasma Technology for Modification or Fabrication of Carbon‐Based Materials and Their Applications in Environmental, Material, and Energy Fields

Surface Modifications of Activated Carbon and Its Impact on Application

Impact of Corona Treated Activated Carbon in Anionic and Cationic Dye Adsorption

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Plasma Modification of Activated Carbon Fibers for Adsorption of SO₂