TY  - THES
A1  - Fettkenhauer, Christian
T1  - Ionothermale Synthese funktioneller Kohlenstoffnitrid basierter Materialien
T1  - Ionothermal synthesis of functional carbon nitride based materials
N2  - Die Doktorarbeit behandelt die Synthese Kohlenstoffnitrid basierter Materialien in eutektischen Mischungen bivalenter Metallchloride. Der Fokus liegt dabei auf ZnCl2-, SnCl2- und CoCl2-haltigen eutektischen Mischungen, in denen die Kondensation gebräuchlicher organischer Precursoren durchgeführt wird. Im Rahmen dessen wird untersucht wie durch die Reaktionsführung in Salzschmelzen unterschiedlicher Lewis-Acidität, neben der Molekülstruktur andere charakteristische Eigenschaften, wie Morphologie, Kristallinität und spezifische Oberflächen, der Materialien kontrolliert werden können. Darüber hinaus werden die optischen Eigenschaften der Materialien erörtert und in diesem Zusammenhang die Eignung als Photokatalysatoren für den oxidativen Abbau organischer Farbstoffe und für die photokatalytische Wasserreduktion bzw. –oxidation untersucht. Zusätzlich wird gezeigt, wie im System LiCl/KCl in einem einstufigen Prozess edelmetallfreie Kohlenstoffnitrid Komposite zur photokatalytischen Wasserreduktion hergestellt werden können.
N2  - The thesis deals with the synthesis of carbon nitride based materials in eutectic mixtures of bivalent metal chlorides. The focus is on ZnCl2, SnCl2 and CoCl2 containing eutectic mixtures in which the condensation reaction of classical organic precursors is carried out. In this context, it is investigated how to control molecular structure and other materials properties, like morphology, crystallinity and specific surface areas by using salt melts of different Lewis acidity. Moreover optical properties of the materials are discussed and in this connection their suitability as photocatalysts for dye degradation and photocatalytic water reduction and oxidation is investigated. Additionally it is demonstrated how to produce noble metal free carbon nitride composites in LiCl/KCl melt  for photocatalytic water reduction.
KW  - Kohlenstoffnitride
KW  - ionothermal
KW  - Komposite
KW  - Photokatalyse
KW  - Wasserstoff
KW  - carbon nitride
KW  - ionothermal
KW  - composites
KW  - photocatalysis
KW  - hydrogen
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-78087
ER  - 
TY  - JOUR
A1  - Jordan, Thomas
A1  - Fechler, Nina
A1  - Xu, Jingsan
A1  - Brenner, Thomas J. K.
A1  - Antonietti, Markus
A1  - Shalom, Menny
T1  - "Caffeine Doping" of Carbon/Nitrogen-Based Organic Catalysts: Caffeine as a Supramolecular Edge Modifier for the Synthesis of Photoactive Carbon Nitride Tubes
JF  - ChemCatChem : heterogeneous & homogeneous & bio- & nano-catalysis ; a journal of ChemPubSoc Europe
N2  - An alternative method for the structure tuning of carbon nitride materials by using a supramolecular approach in combination with caffeine as lining-agent is described. The self-assembly of the precursor complex consisting of melamine and cyanuric acid can be controlled by this doping molecule in terms of morphology, electronic, and photophysical properties. Caffeine is proposed to insert as an edge-molecule eventually leading to hollow tube-like carbon nitride structures with improved efficiency of charge formation. Compared to the bulk carbon nitride, the caffeine-doped analogue possesses a higher photocatalytic activity for the degradation of rhodamineB dye. Furthermore, this approach is also shown to be suitable for the modification of carbon nitride electrodes.
KW  - caffeine
KW  - carbon nitride
KW  - films
KW  - photocatalysis
KW  - supramolecular chemistry
Y1  - 2015
U6  - https://doi.org/10.1002/cctc.201500343
SN  - 1867-3880
SN  - 1867-3899
VL  - 7
IS  - 18
SP  - 2826
EP  - 2830
PB  - Wiley-VCH
CY  - Weinheim
ER  -