Carbon quantum dots assisted graphene exfoliation derived activated carbon

Graphene is deemed as the strongest and toughest material since its discovery in 2004 by Andre Geim and Konstantin Novoselov as it offers exceptional potential in electronic, thermal and mechanical properties for various application in future. Graphene can be derived from any materials that have pre...

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Main Author:	Norshahirah Nadiah, Abd Rahman
Format:	Undergraduates Project Papers
Language:	English English English English
Published:	2016
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/19281/ http://umpir.ump.edu.my/id/eprint/19281/ http://umpir.ump.edu.my/id/eprint/19281/1/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-Table%20of%20contents.pdf http://umpir.ump.edu.my/id/eprint/19281/2/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-Abstract.pdf http://umpir.ump.edu.my/id/eprint/19281/3/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-Chapter%201.pdf http://umpir.ump.edu.my/id/eprint/19281/4/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-References.pdf

id	ump-19281
recordtype	eprints
spelling	ump-192812017-12-19T03:35:12Z http://umpir.ump.edu.my/id/eprint/19281/ Carbon quantum dots assisted graphene exfoliation derived activated carbon Norshahirah Nadiah, Abd Rahman TA Engineering (General). Civil engineering (General) Graphene is deemed as the strongest and toughest material since its discovery in 2004 by Andre Geim and Konstantin Novoselov as it offers exceptional potential in electronic, thermal and mechanical properties for various application in future. Graphene can be derived from any materials that have presence of carbon in its structure and can be exfoliated in various ways including wet chemicals route. However, chemical reduction of graphene from any carbon sources is highly toxic and harmful to human‟s health and environment. In this study, an environmental friendly approach to exfoliate graphene is proposed where graphene is derived from activated carbon (AC) and water as solvent through liquid phase exfoliation method. The exfoliation is assisted by sonication process where the induced microbubbles due to cavitation will collapse and release a tremendous amount of energy to exfoliate graphene from AC. Since water has high surface tension, carbon quantum dots (CQDs) is added to reduce the surface tension to the optimum range and as an exfoliation agent. The CQDs is synthesized from citric acid and urea by microwave irradiation. Dialysis process of CQDs solution is done to remove large and unreacted particles to obtained fine particle size of CQDs. The morphology of exfoliated graphene and CQDs is confirmed by FESEM analysis. The functional groups for exfoliated graphene and CQDs are determined by FT-IR (ATR) spectroscopy analysis. The concentration of exfoliated graphene obtained is calculated by linear regression equation obtained from a standard curve of graphene where 0.01177 mg/mL is produced from 24 mg of activated carbon. 2016-12 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/19281/1/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-Table%20of%20contents.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/19281/2/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-Abstract.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/19281/3/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-Chapter%201.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/19281/4/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-References.pdf Norshahirah Nadiah, Abd Rahman (2016) Carbon quantum dots assisted graphene exfoliation derived activated carbon. Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:102316&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English English English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Norshahirah Nadiah, Abd Rahman Carbon quantum dots assisted graphene exfoliation derived activated carbon
description	Graphene is deemed as the strongest and toughest material since its discovery in 2004 by Andre Geim and Konstantin Novoselov as it offers exceptional potential in electronic, thermal and mechanical properties for various application in future. Graphene can be derived from any materials that have presence of carbon in its structure and can be exfoliated in various ways including wet chemicals route. However, chemical reduction of graphene from any carbon sources is highly toxic and harmful to human‟s health and environment. In this study, an environmental friendly approach to exfoliate graphene is proposed where graphene is derived from activated carbon (AC) and water as solvent through liquid phase exfoliation method. The exfoliation is assisted by sonication process where the induced microbubbles due to cavitation will collapse and release a tremendous amount of energy to exfoliate graphene from AC. Since water has high surface tension, carbon quantum dots (CQDs) is added to reduce the surface tension to the optimum range and as an exfoliation agent. The CQDs is synthesized from citric acid and urea by microwave irradiation. Dialysis process of CQDs solution is done to remove large and unreacted particles to obtained fine particle size of CQDs. The morphology of exfoliated graphene and CQDs is confirmed by FESEM analysis. The functional groups for exfoliated graphene and CQDs are determined by FT-IR (ATR) spectroscopy analysis. The concentration of exfoliated graphene obtained is calculated by linear regression equation obtained from a standard curve of graphene where 0.01177 mg/mL is produced from 24 mg of activated carbon.
format	Undergraduates Project Papers
author	Norshahirah Nadiah, Abd Rahman
author_facet	Norshahirah Nadiah, Abd Rahman
author_sort	Norshahirah Nadiah, Abd Rahman
title	Carbon quantum dots assisted graphene exfoliation derived activated carbon
title_short	Carbon quantum dots assisted graphene exfoliation derived activated carbon
title_full	Carbon quantum dots assisted graphene exfoliation derived activated carbon
title_fullStr	Carbon quantum dots assisted graphene exfoliation derived activated carbon
title_full_unstemmed	Carbon quantum dots assisted graphene exfoliation derived activated carbon
title_sort	carbon quantum dots assisted graphene exfoliation derived activated carbon
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/19281/ http://umpir.ump.edu.my/id/eprint/19281/ http://umpir.ump.edu.my/id/eprint/19281/1/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-Table%20of%20contents.pdf http://umpir.ump.edu.my/id/eprint/19281/2/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-Abstract.pdf http://umpir.ump.edu.my/id/eprint/19281/3/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-Chapter%201.pdf http://umpir.ump.edu.my/id/eprint/19281/4/Carbon%20quantum%20dots%20assisted%20graphene%20exfoliation%20derived%20activated%20carbon%20-References.pdf
first_indexed	2023-09-18T22:27:39Z
last_indexed	2023-09-18T22:27:39Z
_version_	1777416074018422784

Carbon quantum dots assisted graphene exfoliation derived activated carbon

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