Metal-free high-adsorption-capacity adsorbent derived from spent coffee grounds for methylene blue
DC Field | Value | Language |
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dc.contributor.author | Sukhbaatar, B. | - |
dc.contributor.author | Yoo, Bongyoung | - |
dc.contributor.author | Lim, Jae-Hong | - |
dc.date.available | 2021-03-03T03:40:10Z | - |
dc.date.created | 2021-02-09 | - |
dc.date.issued | 2021-02 | - |
dc.identifier.issn | 2046-2069 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/80246 | - |
dc.description.abstract | Heavy-metal-free carbon materials were prepared from spent coffee grounds (SCG) using the coupled KOH-urea and NaOH-urea as activating agents, and these were compared with SCG activation by the alkali salts alone. SCG was impregnated with the activating agents before being pyrolyzed at 800 °C under a N2 atmosphere. Characterization of the as-pyrolyzed carbon materials was performed by field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and measurement of N2 adsorption-desorption isotherms. The carbon materials were utilized for the adsorption of methylene blue (MB) in aqueous solutions. Combining KOH and urea as activating agents resulted in the generation of pertinent SCG-derived carbon material properties, including a large surface area (1665.45 m2 g-1) and excellent MB adsorption capacity. Adsorption efficiencies were studied using adsorption kinetics (pseudo-first-order and pseudo-second-order) and adsorption isotherm (Langmuir, Freundlich, and Temkin) models. The influences of pH and temperature were investigated. The results of this work raise new possibilities for synthesizing carbon materials with high MB adsorption capacities from biowastes, via less-toxic, energy-saving conventional pyrolysis methods for water-treatment applications. This journal is © The Royal Society of Chemistry. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | Royal Society of Chemistry | - |
dc.relation.isPartOf | RSC Advances | - |
dc.title | Metal-free high-adsorption-capacity adsorbent derived from spent coffee grounds for methylene blue | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000612838700038 | - |
dc.identifier.doi | 10.1039/d0ra09550h | - |
dc.identifier.bibliographicCitation | RSC Advances, v.11, no.9, pp.5118 - 5127 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.scopusid | 2-s2.0-85100162589 | - |
dc.citation.endPage | 5127 | - |
dc.citation.startPage | 5118 | - |
dc.citation.title | RSC Advances | - |
dc.citation.volume | 11 | - |
dc.citation.number | 9 | - |
dc.contributor.affiliatedAuthor | Lim, Jae-Hong | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | Adsorption | - |
dc.subject.keywordPlus | Adsorption isotherms | - |
dc.subject.keywordPlus | Carbon | - |
dc.subject.keywordPlus | Chemical activation | - |
dc.subject.keywordPlus | Enamels | - |
dc.subject.keywordPlus | Energy conservation | - |
dc.subject.keywordPlus | Field emission microscopes | - |
dc.subject.keywordPlus | Heavy metals | - |
dc.subject.keywordPlus | High resolution transmission electron microscopy | - |
dc.subject.keywordPlus | Metabolism | - |
dc.subject.keywordPlus | Potassium hydroxide | - |
dc.subject.keywordPlus | Scanning electron microscopy | - |
dc.subject.keywordPlus | Sodium hydroxide | - |
dc.subject.keywordPlus | Toxic materials | - |
dc.subject.keywordPlus | Urea | - |
dc.subject.keywordPlus | Water treatment | - |
dc.subject.keywordPlus | X ray photoelectron spectroscopy | - |
dc.subject.keywordPlus | Adsorption efficiency | - |
dc.subject.keywordPlus | Adsorption kinetics | - |
dc.subject.keywordPlus | Field emission scanning electron microscopy | - |
dc.subject.keywordPlus | High adsorption capacity | - |
dc.subject.keywordPlus | Large surface area | - |
dc.subject.keywordPlus | Pseudo second order | - |
dc.subject.keywordPlus | Pseudo-first-order | - |
dc.subject.keywordPlus | Spent coffee grounds | - |
dc.subject.keywordPlus | Driers (materials) | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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