Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/27824 https://doi.org/10.1016/j.ijbiomac.2014.07.019 |
Resumo: | In the present investigation an ecofriendly approach and a simple homogeneous solution casting method led to the development of biodegradable chitosan/graphene oxide bionanocomposites. The formation of bionanocomposite was confirmed by UV–vis, FT-IR, Raman spectroscopy, XRD, and further evaluated by thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The circular dichroism (CD) study of chitosan/graphene oxide revealed that the intensity of the negative transition band at wavelength of 200–222 nm decreased with the different pH of chitosan/graphene oxide solutions. It was also found that the pH conditions affect the interaction between chitosan and graphene oxide. Optical properties of chitosan/graphene oxide are evaluated by photoluminescence (PL) spectroscopy which showed blue shift at excitation wavelength of 255 nm compared to graphene oxide. These results strongly suggest that the bionanocomposite materials may open new vistas in biotechnological, biosensor and biomedical applications. |
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Physiochemical and optical properties of chitosan based graphene oxide bionanocompositeChitosanGraphene oxidePhysiochemicalOptical studyIn the present investigation an ecofriendly approach and a simple homogeneous solution casting method led to the development of biodegradable chitosan/graphene oxide bionanocomposites. The formation of bionanocomposite was confirmed by UV–vis, FT-IR, Raman spectroscopy, XRD, and further evaluated by thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The circular dichroism (CD) study of chitosan/graphene oxide revealed that the intensity of the negative transition band at wavelength of 200–222 nm decreased with the different pH of chitosan/graphene oxide solutions. It was also found that the pH conditions affect the interaction between chitosan and graphene oxide. Optical properties of chitosan/graphene oxide are evaluated by photoluminescence (PL) spectroscopy which showed blue shift at excitation wavelength of 255 nm compared to graphene oxide. These results strongly suggest that the bionanocomposite materials may open new vistas in biotechnological, biosensor and biomedical applications.Elsevier2014-09info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/27824http://hdl.handle.net/10316/27824https://doi.org/10.1016/j.ijbiomac.2014.07.019engKUMAR, Santosh; KOH, Joonseok - Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite. "International Journal of Biological Macromolecules". ISSN 0141-8130. Vol. 70 (2014) p. 559–5640141-8130http://www.sciencedirect.com/science/article/pii/S0141813014004917Kumar, SantoshKoh, Joonseokinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-05-25T13:18:25Zoai:estudogeral.uc.pt:10316/27824Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:49.291580Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite |
title |
Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite |
spellingShingle |
Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite Kumar, Santosh Chitosan Graphene oxide Physiochemical Optical study |
title_short |
Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite |
title_full |
Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite |
title_fullStr |
Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite |
title_full_unstemmed |
Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite |
title_sort |
Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite |
author |
Kumar, Santosh |
author_facet |
Kumar, Santosh Koh, Joonseok |
author_role |
author |
author2 |
Koh, Joonseok |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Kumar, Santosh Koh, Joonseok |
dc.subject.por.fl_str_mv |
Chitosan Graphene oxide Physiochemical Optical study |
topic |
Chitosan Graphene oxide Physiochemical Optical study |
description |
In the present investigation an ecofriendly approach and a simple homogeneous solution casting method led to the development of biodegradable chitosan/graphene oxide bionanocomposites. The formation of bionanocomposite was confirmed by UV–vis, FT-IR, Raman spectroscopy, XRD, and further evaluated by thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The circular dichroism (CD) study of chitosan/graphene oxide revealed that the intensity of the negative transition band at wavelength of 200–222 nm decreased with the different pH of chitosan/graphene oxide solutions. It was also found that the pH conditions affect the interaction between chitosan and graphene oxide. Optical properties of chitosan/graphene oxide are evaluated by photoluminescence (PL) spectroscopy which showed blue shift at excitation wavelength of 255 nm compared to graphene oxide. These results strongly suggest that the bionanocomposite materials may open new vistas in biotechnological, biosensor and biomedical applications. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-09 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/27824 http://hdl.handle.net/10316/27824 https://doi.org/10.1016/j.ijbiomac.2014.07.019 |
url |
http://hdl.handle.net/10316/27824 https://doi.org/10.1016/j.ijbiomac.2014.07.019 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
KUMAR, Santosh; KOH, Joonseok - Physiochemical and optical properties of chitosan based graphene oxide bionanocomposite. "International Journal of Biological Macromolecules". ISSN 0141-8130. Vol. 70 (2014) p. 559–564 0141-8130 http://www.sciencedirect.com/science/article/pii/S0141813014004917 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133908806139904 |