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[{"key": "dc.contributor.advisor", "value": "Louhelainen, Jarmo", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Lamberg, Hannu", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Pirttij\u00e4rvi, Emmi", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2025-01-10T07:15:44Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2025-01-10T07:15:44Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2024", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/99345", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4ss\u00e4 opinn\u00e4ytety\u00f6ss\u00e4 tutkittiin aktiivihiilen pintakemiaa. Tutkimus tehtiin Neova Oy:n toimeksiannosta, ja tarkoituksena oli verrata heid\u00e4n tutkimus- ja kehityslaboratoriossaan valmistettuja aktiivihiili\u00e4 kaupallisiin aktiivihiiliin. Ty\u00f6ss\u00e4 tutkittiin my\u00f6s huokoskokojakaumaa ja ominaispinta-alaa, jotta pintakemiasta saatiin kattava kokonaiskuva. Tutkimuksen ensisijaisena tavoitteena oli selvitt\u00e4\u00e4 n\u00e4iden ominaisuuksien vaikutusta adsorptioprosessiin.\nKirjallisuuskatsauksessa selvitettiin aktiivihiilen pinnan kemiallisia ominaisuuksia sek\u00e4 selvitettiin n\u00e4iden ominaisuuksien vaikutusta adsorptioprosessiin. Lis\u00e4ksi selvitettiin sopivimmat pintakemian tutkimusmenetelm\u00e4t ja kuinka aktiivihiilen pintakemiaa voidaan muokata kemiallisin menetelmin. Kokeellisessa osassa aktiivihiilin\u00e4ytteet valmistettiin ensin hiilt\u00e4m\u00e4ll\u00e4 ja sitten aktivoimalla ne fysikaalisella aktivointimenetelm\u00e4ll\u00e4. Pintakemiaa tutkittiin k\u00e4ytt\u00e4m\u00e4ll\u00e4 Bohmin titrausta, FTIR-spektroskopiaa, XPS-spektroskopiaa ja adsorptioisotermej\u00e4, jotka m\u00e4\u00e4ritettiin BET-analysaattorilla. Lis\u00e4ksi tehtiin alkuaineanalyysi, jota k\u00e4ytettiin tukena selvitett\u00e4ess\u00e4 aktiivihiilten pinnalta l\u00f6ytyvi\u00e4 atomeita. \nTulokset osoittivat, ett\u00e4 hiileen n\u00e4hden heteroatomeja sis\u00e4lt\u00e4vi\u00e4 funktionaalisia ryhmi\u00e4 tutkituissa hiiliss\u00e4 oli suhteellisen v\u00e4h\u00e4n. Voitiin olettaa, ett\u00e4 n\u00e4iss\u00e4 hiiliss\u00e4 adsorptioprosessi perustui p\u00e4\u00e4asiassa fysisorptioon, ja kemisorption osuus oli v\u00e4h\u00e4inen. N\u00e4in ollen hyvin kehittynyt huokosrakenne ja j\u00e4rjest\u00e4ytyneet \u03c0-sidokset grafeenin kaltaisissa levyiss\u00e4 ovat todenn\u00e4k\u00f6isesti vastuussa adsorptioprosessista. N\u00e4iden tietojen lis\u00e4ksi tutkimuksessa saatuja tietoja voidaan hy\u00f6dynt\u00e4\u00e4 tulevaisuudessa, jos halutaan muokata aktiivihiilien pintakemiaa. Lis\u00e4ksi l\u00f6ydettiin aktiivihiilen pinnan tutkimiseen soveltuvat tutkimusmenetelm\u00e4t. Yhteenvetona voidaan todeta, ett\u00e4 tutkimus tarjosi uutta tietoa Neovan aktiivihiilten pintakemiasta ja sen vaikutuksista adsorptioon.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "This thesis investigated the surface chemistry of activated carbon. The research was conducted on commission from Neova Oy, with the objective of comparing the activated carbons produced in their research and development laboratory with commercial activated carbons. The investigation also encompassed pore size distribution and surface area, with the objective of determining their influence on the adsorption process. The primary focus of the study was to ascertain the impact of these properties on the process of adsorption.\nThe objective of the literature review was to provide an insight into the surface chemistry of activated carbon, to assess the influence of this chemistry on adsorption processes and to identify the most suitable methodologies for investigating it. Furthermore, a number of techniques for modifying the surface chemistry of activated carbon were investigated. In the experimental part the samples of activated carbon were prepared by the processes of carbonisation and physical activation. The study was conducted to investigate the surface chemistry of activated carbon. This was achieved through the utilisation of Boehm titration, FTIR spectroscopy, XPS spectroscopy and the determination of adsorption isotherms using a BET analyser. Furthermore, an elemental analysis was conducted to provide additional insights into the surface chemistry.\nThe results indicated that a relatively limited number of functional groups containing heteroatoms in relation to carbon were identified. It could be postulated that for these carbons the adsorption process was predominantly physisorption based, with a minimal contribution from chemisorption. It could therefore be concluded that the advanced pore structure and the basic \u03c0 basal planes are primarily responsible for the adsorption process in this case. In addition to this information, the research offers a foundation for selecting potential avenues for modifying the carbon surface and has identified the optimal methodologies for investigating the carbon surface. In conclusion, the research had provided new insights into the surface chemistry of Neova Carbons activated carbons and its effect on adsorption.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2025-01-10T07:15:44Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2025-01-10T07:15:44Z (GMT). No. of bitstreams: 0\n Previous issue date: 2024", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "73", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.title", "value": "Study of surface chemistry of activated carbon by Boehm titration and spectroscopic methods", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202501101117", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Kemian laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Chemistry", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Analyyttinen kemia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Analytical Chemistry", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.collaborator", "value": "business", "language": "", "element": "contractresearch", "qualifier": "collaborator", "schema": "yvv"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "yvv.contractresearch.initiative", "value": "business", "language": "", "element": "contractresearch", "qualifier": "initiative", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "40311", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "adsorptio", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "pintakemia", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "aktiivihiili", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "spektroskopia", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "titraus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "adsorption", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "surface chemistry", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "activated carbon", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "spectroscopy", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "titration", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
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