Reusable carbon nanofibers for efficient removal of methylene blue from aqueous solution

Ibupoto, Abdul Sameeu; Qureshi, Umair Ahmed; Ahmed, Farooq; Khatri, Zeeshan; Khatri, Muzamil; Maqsood, Maryam; Brohi, Rafi Zaman; Kim, Ick Soo

doi:10.1016/j.cherd.2018.06.035

Cited by 87 publications

(45 citation statements)

References 25 publications

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“…Besides, many researches have been developed on the employ of biomass as a precursor of carbon active such as residues derives form tea, coffee or grapes and olives bones [6,21,22]. Within its wide variety of applications, the most common is the use of AC to removal several pollutants from wastewater due to its simplicity and low cost [9,18,[23][24][25]. Other applications are the employment as a decolourizer for food industry, catalysis, purification of the chemical and pharmaceutical industry, for the elimination of gases, improving the noble metals or storing energy [26,27].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

Ramón-Gonçalves¹,

Alcaraz²,

Ferreras³

et al. 2019

Preprint

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A valorization process of spent coffee grounds (SCG) was studied. Thus, a two-stage process, a stage of extraction of the polyphenols and a stage of obtaining activated carbon (AC) by a carbonization process, was performed. The extraction was carried out with a hydro-alcoholic solution in a pressure reactor, modifying time and temperature. To optimize the extraction of polyphenols, a two-level factorial design with three replications at the central values was used. The best results were obtained by performing the extraction at 80 °C during 30 min, using a mixture of EtOH:H2O 1:1 (v/v) as extraction solution. Caffeine and chlorogenic acid were the most abundant compounds in the analyzed extracts, ranging from 0.09 to 4.8 mg∙g-1 and 0.06 to 9.7 mg∙g-1, respectively. The precursor obtained in the extraction stage were transformed into AC. An experimental design was realized in order to analyze the influence of different variables in the AC obtained process (reaction time and amount of potassium hydroxide used). Actived carbons with BET specific surface (SBET) comprised between 1600 m2∙g-1 and 2330 m2∙g-1 had a microporous surface. Under the optimum conditions, the obtained AC presented a maximum adsorption capacity of methylene blue (qm) between 411 mg∙g-1 and 813 mg∙g-1.

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Section: Introductionmentioning

confidence: 99%

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

Ramón-Gonçalves¹,

Alcaraz²,

Ferreras³

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…With the increase of the ratios of chitosan/polyamide, the adsorption capacities improved, which was assigned to the fact that more reactive sites are present in chitosan than polyamide. Li et al reported an efficient and facile route to cover electrospun silk nanofibers with MOFs for high removal efficiency toward [19], (II) MB on CNFs governed by π-π stacking interactions [20], and (III) orange II on titania aerogel via H bonding and electrostatic forces [5]. rhodamine B (RB) and malachite green (MG) [23].…”

Section: Electrospinning Bio-based Polymers For Water Treatmentmentioning

confidence: 99%

“…The main approaches to decorate CNFs with active materials include electrodeposition, chemical synthesis, and dry synthesis. Interestingly, the CNFs also present adsorption capacity ( Figure 3II), due to the binding between aromatic rings of CNFs and adsorbate based on π-π stacking interaction [20]. The high conductive and chemically inert properties of CNFs enhance its application in dye degradation via photocatalysis and promote reusability.…”

Section: Carbon Nanofibers As Supporting Materialsmentioning

confidence: 99%

Composite Nanofibers: Recent Progress in Adsorptive Removal and Photocatalytic Degradation of Dyes

Phan¹,

Kim²

2020

Composite and Nanocomposite Materials - From Knowledge to Industrial Applications

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This chapter intends to review the state of the art of a new nanomaterial generation based on electrospun composite nanofibers for dye removal from wastewater. Natural polymer-based nanofibers, nanofibers with unique morphology, and carbon nanofibers were comprehensively reviewed as capable carriers for a broad spectrum of functional materials such as metal oxides, zeolite, graphene and graphene oxide (GO), and metal-organic frameworks (MOFs) in the application of dye removal. The various nanostructures, adsorption capacity, advantages, and drawbacks were discussed along with mechanistic actions in the adsorption process and photocatalytic performance that emphasize current research development, opportunities, and challenges. The chapter covers multiple intriguing topics with in-depth discussion and is a valuable reference for researchers who are working on nanomaterials and the treatment of colored waters.

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“…Besides, many researches have been developed on the employ of biomass as a precursor of carbon active such as residues derives form tea, coffee or grapes and olives bones [20][21][22] . Within its wide variety of applications, the most common is the use of AC to removal several pollutants from wastewater due to its simplicity and low cost 6,9,[23][24][25] . Other applications are the employment as a decolourizer for food industry, catalysis, purification of the chemical and pharmaceutical industry, for the elimination of gases, improving the noble metals or storing energy 26,27 .…”

Section: Introductionmentioning

confidence: 99%

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

López¹,

Gonçalves²,

Alcaraz³

et al. 2019

Preprint

View full text Add to dashboard Cite

A valorization process of spent coffee grounds (SCG) was studied. Thus, a two-stage process, a stage of extraction of the polyphenols and a stage of obtaining activated carbon (AC) by a carbonization process, was performed. The extraction was carried out with a hydro-alcoholic solution in a pressure reactor, modifying time and temperature. To optimize the extraction of polyphenols, a two-level factorial design with three replications at the central values was used. The best results were obtained by performing the extraction at 80 ºC during 30 min, using a mixture of EtOH:H2O 1:1 (v/v) as extraction solution. Caffeine and chlorogenic acid were the most abundant compounds in the analysed extracts, ranging from 0.09 to 4.8 mg∙g-1 and 0.06 to 9.7 mg∙g-1, respectively. The precursor obtained in the extraction stage were transformed into AC. An experimental design was realized in order to analyze the influence of different variables in the AC obtained process (reaction time and amount of potassium hydroxide used). Actived carbons with BET specific surface (SBET) comprised between 1600 m2∙g-1 and 2330 m2∙g-1 had a microporous surface. Under the optimum conditions, the obtained AC presented a maximum adsorption capacity of methylene blue (qm) between 411 mg∙g-1 and 813 mg∙g-1.

show abstract

Reusable carbon nanofibers for efficient removal of methylene blue from aqueous solution

Cited by 87 publications

References 25 publications

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

Composite Nanofibers: Recent Progress in Adsorptive Removal and Photocatalytic Degradation of Dyes

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

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