TY  - GEN
A1  - Krüger, Stefanie
A1  - Schwarze, Michael
A1  - Baumann, Otto
A1  - Günter, Christina
A1  - Bruns, Michael
A1  - Kübel, Christian
A1  - Szabó, Dorothée Vinga
A1  - Meinusch, Rafael
A1  - de Zea Bermudez, Verónica
A1  - Taubert, Andreas
T1  - Bombyx mori silk/titania/gold hybrid materials for photocatalytic water splitting
BT  - combining renewable raw materials with clean fuels
T2  - Postprints der Universität Potsdam Mathematisch-Naturwissenschaftliche Reihe
N2  - The synthesis, structure, and photocatalytic water splitting performance of two new titania (TiO 2 )/gold(Au)/Bombyx mori silk hybrid materials are reported. All materials are monoliths with diameters of up to ca. 4.5 cm. The materials are macroscopically homogeneous and porous with surface areas between 170 and 210 m 2/g. The diameter of the TiO 2 nanoparticles (NPs) – mainly anatase with a minor fraction of brookite – and the Au NPs are on the order of 5 and 7–18 nm, respectively. Addition of poly(ethylene oxide) to the reaction mixture enables pore size tuning, thus providing access to different materials with different photocatalytic activities. Water splitting experiments using a sunlight simulator and a Xe lamp show that the new hybrid materials are effective water splitting catalysts and produce up to 30 mmol of hydrogen per 24 h. Overall the article demonstrates that the combination of a renewable and robust scaffold such as B. mori silk with a photoactive material provides a promising approach to new monolithic photocatalysts that can easily be recycled and show great potential for application in lightweight devices for green fuel production.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 581 
KW  - Bombyx mori silk
KW  - gold
KW  - photocatalytic water splitting
KW  - titania
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-423499
SN  - 1866-8372
IS  - 581
ER  - 
TY  - GEN
A1  - Junginger, Mathias
A1  - Kübel, Christian
A1  - Schacher, Felix H.
A1  - Müller, Axel H. E.
A1  - Taubert, Andreas
T1  - Crystal structure and chemical composition of biomimetic calcium phosphate nanofibers
N2  - Calcium phosphate nanofibers with a diameter of only a few nanometers and a cotton-ball-like aggregate morphology have been reported several times in the literature. Although fiber formation seems reproducible in a variety of conditions, the crystal structure and chemical composition of the fibers have been elusive. Using scanning transmission electron microscopy, low dose electron (nano)diffraction, energy-dispersive X-ray spectroscopy, and energy-filtered transmission electron microscopy, we have assigned crystal structures and chemical compositions to the fibers. Moreover, we demonstrate that the mineralization process yields true polymer/calcium phosphate hybrid materials where the block copolymer template is closely associated with the calcium phosphate.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 244 
KW  - air-water-interface
KW  - polycationic monolayer
KW  - mineralization beneath
KW  - block-copolymers
KW  - aqueous-solution
KW  - morphology
KW  - orthophosphates
KW  - biomaterials
KW  - nucleation
KW  - clusters
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-95176
SP  - 11301
EP  - 11308
ER  -