TY  - JOUR
A1  - Pereira, Rui F. P.
A1  - Zehbe, Kerstin
A1  - Günter, Christina
A1  - dos Santos, Tiago
A1  - Nunes, Silvia C.
A1  - Almeida Paz, Filipe A.
A1  - Silva, Maria M.
A1  - Granja, Pedro L.
A1  - Taubert, Andreas
A1  - de Zea Bermudez, Verónica
T1  - Ionic liquid-assisted synthesis of mesoporous silk fibroin/silica hybrids for biomedical applications
JF  - ACS Omega
N2  - New mesoporous silk fibroin (SF)/silica hybrids were processed via a one-pot soft and energy-efficient sol-gel chemistry and self-assembly from a silica precursor, an acidic or basic catalyst, and the ionic liquid 1-butyl-3-methylimidazolium chloride, acting as both solvent and mesoporosity-inducer. The as-prepared materials were obtained as slightly transparent-opaque, amorphous monoliths, easily transformed into powders, and stable up to ca. 300 degrees C. Structural data suggest the formation of a hexagonal mesostructure with low range order and apparent surface areas, pore volumes, and pore radii of 205-263 m(2) g(-1), 0.16-0.19 cm(3) g(-1), and 1.2-1.6 nm, respectively. In all samples, the dominating conformation of the SF chains is the beta-sheet. Cytotoxicity/bioactivity resazurin assays and fluorescence microscopy demonstrate the high viability of MC3T3 pre-osteoblasts to indirect (>= 99 +/- 9%) and direct (78 +/- 2 to 99 +/- 13%) contact with the SF/silica materials. Considering their properties and further improvements, these systems are promising candidates to be explored in bone tissue engineering. They also offer excellent prospects as electrolytes for solid-state electrochemical devices, in particular for fuel cells.
Y1  - 2018
U6  - https://doi.org/10.1021/acsomega.8b02051
SN  - 2470-1343
VL  - 3
IS  - 9
SP  - 10811
EP  - 10822
PB  - American Chemical Society
CY  - Washington
ER  - 
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  -