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Plastic waste-derived carbon nanotubes: Influence of growth catalyst and catalytic activity in CWPO

2025Journal article Restricted access
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dc.contributor.authorRoman, Fernanda
dc.contributor.authorSilva, Adriano S.
dc.contributor.authorDíaz de Tuesta, Jose Luis
dc.contributor.authorBaldo, Arthur Pietrobon
dc.contributor.authorLopes, Jéssica Paula Marim
dc.contributor.authorGonçalves, Giane
dc.contributor.authorPereira, Ana I.
dc.contributor.authorPraça, Paulo
dc.contributor.authorSilva, Adrián
dc.contributor.authorFaria, Joaquim
dc.contributor.authorBañobre-López, Manuel
dc.contributor.authorGomes, Helder
dc.date.accessioned2025-01-13T10:45:00Z
dc.date.available2025-01-13T10:45:00Z
dc.date.issued2025
dc.description.abstractLow-density polyethylene (LDPE) was used in this work to grow carbon nanotubes (CNTs) by chemical vapor deposition (CVD) over catalysts based on Ni, Fe and Al, synthesized either by co-precipitation (C) or wet impregnation (I) methods, with CNT yields in the range of 16–33 %. The morphology of the CNTs was directly influenced by the route used for the CVD catalyst synthesis, with co-precipitation-derived CVD catalysts resulting in CNT samples with curly walls. CNTs were purified with H2SO4 (10–50 wt.%) to remove attached metal particles. All synthesized materials (CVD-catalysts, as-synthesized CNTs, and purified CNTs) were tested as catalysts in the catalytic wet peroxide oxidation (CWPO) of paracetamol (PCM), chosen as a model pharmaceutical compound. Removals of 100 % of PCM in 8 h and 71 % of total organic carbon (TOC) in 24 h were achieved, with an H2O2 consumption efficiency of 76 % in 24 h for purified CNT (CNT@NiFeAl-C-P). The same CVD-catalyst (NiFeAl-C) was used to grow CNTs using real LDPE waste, and it was tested under the same reaction conditions, resulting in a PCM and TOC abatement of 90 % and 65 %, respectively. The synthesis of CNTs using LDPE waste was a good alternative, given the environmental benefits associated with its reintroduction into the economic cycle as a material with higher value than initially (upcycling).pt_PT
dc.description.sponsorshipThis work was financially supported by project "PLASTIC_TO_FUEL&MAT – Upcycling Waste Plastics into Fuel and Carbon Nanomaterials" (PTDC/EQU-EQU/31439/2017), and by national funds through FCT/MCTES (PIDDAC): CeDRI, UIDB/05757/2020 (DOI: 10.54499/UIDB/05757/2020) and UIDP/05757/2020 (DOI: 10.54499/ UIDB/05757/2020); CIMO, UIDB/00690/2020 (DOI: 10.54499/UIDB/ 00690/2020) and UIDP/00690/2020 (DOI: 10.54499/UIDP/00690/ 2020); SusTEC, LA/P/0007/2020 (DOI: 10.54499/LA/P/0007/2020); LSRE-LCM, UIDB/50020/2020 (DOI: 10.54499/UIDB/50020/2020) and UIDP/50020/2020 (DOI: 10.54499/UIDP/50020/2020); ALiCE, LA/P/0045/2020 (DOI: 10.54499/LA/P/0045/2020); and PTDC/CTA- AMB/3489/2021 - RECY-SMARTE (DOI 10.54499/PTDC/CTA-AMB/3489/2021). Fernanda F. Roman acknowledges the national funding by FCT and the European Social Fund, FSE, through the individual research grant SFRH/BD/143224/2019. Adriano S. Silva was supported by the doctoral Grant SFRH/BD/151346/2021 financed by FCT with funds from NORTE2020, under MIT Portugal Program. Jose L. Diaz De Tuesta acknowledges the financial support through the program of Atracción al Talento of Comunidad de Madrid (Spain) for the individual research grant 2022-T1/AMB-23946. The authors are also grateful for the finantial support provided by Sociedade Ponto Verde for the project “Estudo técnico-económico para a valorização de resíduos de embalagens plásticas na produção de nanotubos de carbono”.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationRoman, Fernanda F.; Silva, Adriano S.; Diaz de Tuesta, Jose L.; Baldo, Arthur P.; Lopes, Jessica P.M.; Gonçalves, Giane; Pereira, Ana I.; Praça, Paulo; Silva, Adrián M.T.; Faria, Joaquim L.; Bañobre-López, Manuel; Gomes, Helder T. (2025). Plastic waste-derived carbon nanotubes: Influence of growth catalyst and catalytic activity in CWPO. Journal of Environmental Chemical Engineering. ISSN 2213-3437. 13, p. 1-15pt_PT
dc.identifier.doi10.1016/j.jece.2024.115206pt_PT
dc.identifier.issn2213-3437
dc.identifier.urihttp://hdl.handle.net/10198/30931
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationUpcycling Waste Plastics into Fuel and Carbon Nanomaterials
dc.relationResearch Centre in Digitalization and Intelligent Robotics
dc.relationResearch Centre in Digitalization and Intelligent Robotics
dc.relationMountain Research Center
dc.relationMountain Research Center
dc.relationAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
dc.relationLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
dc.relationLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
dc.relationALICE - Associate Laboratory in Chemical Engineering
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPlastic solid wastept_PT
dc.subjectAdvanced oxidation processes (AOPs)pt_PT
dc.subjectHeterogeneous fentonpt_PT
dc.subjectAcetaminophenpt_PT
dc.subjectContaminants of emerging concernpt_PT
dc.subjectCarbocatalystspt_PT
dc.titlePlastic waste-derived carbon nanotubes: Influence of growth catalyst and catalytic activity in CWPOpt_PT
dc.typejournal article
dspace.entity.typePublication
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oaire.citation.endPage15pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of Environmental Chemical Engineeringpt_PT
oaire.citation.volume13pt_PT
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