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| Identifier |
000413122 |
| Title |
Αποφλοίωση γραφίτη και χημική τροποποίηση γραφενίου, καθώς και σχετικών νανοδομών άνθρακα, με παράγωγα υποκατεστημένων (τρι)θειοφαινίων και άλλων χρωμοφόρων ομάδων για μετατροπή ενέργειας |
| Alternative Title |
Exfoliation of graphite and chemical functionalization of graphene, and related carbon nanoforms, with substituted (ter)thiophene derivatives and other chromophores for energy conversion. |
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Author
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Στεργίου, Αναστάσιος Π
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Thesis advisor
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Σμόνου, Ιουλία
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Reviewer
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Ταγματάρχης, Νίκος
Κατερινόπουλος, Χαράλαμπος
Ορφανόπουλος, Μιχαήλ
Στρατάκης, Εμμανουήλ
Βασιλικογιαννάκης, Γεώργιος
Βουγιουκαλάκης, Γεώργιος
|
| Abstract |
In the present PhD thesis, the synthesis and characterization, in terms of spectrospopic, microspopic and electrochemical studies, of carbon nanostructured materials and specifically based on graphene (Chapters 1-3), fullerene C60 (Chapter 4) and carbon nanohorns (Chapter 5)
are discussed.
In Chapter 1, the synthesis and properties of graphene sheets
supramolecularly decorated with
linear oligothiophenes (n=3 or 9 rings)
is presented.
Τhe formation of
the charge separated state and the electron transfer from the oligothiophenes
units
to
the graphene
sheets, contributing to the understanding of the mechanism
that
takes
place
as well as
the factors affecting the rate of the charge transfer,
are
exploited.
In
Chapter 2, the reactivity of
S-doped
graphene sheets non-covalently
modified with a star-shaped oligothiophene
is evaluated
against
the electrochemical
oxygen reduction. Moreover,
the impact of the sulfur atoms
onto the grapheme sheets
and the morphology of the material on the catalytic activity
is discussed.
In
Chapter 3, the synthesis of
graphene-based
hybrid materials
carrying
either
a
covalently grafted fluorene-perylene copolymer
or a supramolecularly interacting fluorene-perylene copolymer is
described. The catalytic activity
of the hybrid
against
the reduction of nitrophenol to nitroaniline
is also presented.
In
Chapter 4,
host-guest
supramolecular interactions
were
applied for the
fabrication of novel
C60/OPV/C60
hybrid, where the
OPV-Hamilton host interacts
with
two C60-barbiturate guests via multiple hydrogen bonds.
The observed results describe
for the first time, the photoinduced electron transfer in a molecular architecture based
on the self-organization of an OPV-Hamilton molecule with C60 and the
significance
of
multiple hydrogen bonding in charge transfer processes.
In Chapter 5, a large scale (≥1 g) exfoliation protocol
for the individualization
of
aggregated (the so-called “Dhalia flower”) carbon nanohorns
species in one step with the aid of a
superacid
was developed.
Notably, the prepared
in-CNHs posses higher
conductivity than the pristine CNHs and an intact graphitic lattice.
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| Language |
Greek |
| Subject |
C60 |
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Carbon nanohorns |
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Energy convesion and storage |
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Graphene |
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Hybrid nanomaterials |
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Photoactive copolymers |
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Γραφένιο |
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Μετατροπή και αποθήκευση ενέργειας |
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Νανοκέρατα άνθρακα |
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Ολιγομερή θειοφαινίου |
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Υβριδικά νανοϋλικά |
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Φωτοενεργά συμπολυμερή |
| Issue date |
2017-12-18 |
| Collection
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School/Department--School of Sciences and Engineering--Department of Chemistry--Doctoral theses
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Type of Work--Doctoral theses
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| Views |
34 |
Αποφλοίωση γραφίτη και χημική τροποποίηση γραφενίου, καθώς και σχετικών νανοδομών άνθρακα, με παράγωγα υποκατεστημένων (τρι)θειοφαινίων και άλλων χρωμοφόρων ομάδων για μετατροπή ενέργειας
