Filtern
Erscheinungsjahr
Dokumenttyp
- Zeitschriftenartikel (28)
- Beitrag zu einem Tagungsband (9)
- Beitrag zu einem Sammelband (7)
- Posterpräsentation (4)
- Forschungsbericht (3)
- Vortrag (1)
- Sonstiges (1)
- Forschungsdatensatz (1)
Schlagworte
- Glasmalerei (4)
- Kulturguterhaltung (4)
- ESEM (3)
- Emission (3)
- Klimamessungen (3)
- Quecksilber (3)
- Restaurierung (3)
- Umweltsimulation (3)
- Affinity chromatography (2)
- Antibodies (2)
Organisationseinheit der BAM
- 4 Material und Umwelt (16)
- 4.2 Material-Mikrobiom Wechselwirkungen (14)
- 6 Materialchemie (11)
- 6.3 Strukturanalytik (8)
- 1 Analytische Chemie; Referenzmaterialien (6)
- 4.0 Abteilungsleitung und andere (5)
- 1.4 Prozessanalytik (4)
- 4.5 Kunst- und Kulturgutanalyse (3)
- 6.1 Oberflächen- und Dünnschichtanalyse (3)
- 1.5 Proteinanalytik (2)
- 1.8 Umweltanalytik (2)
- 1.9 Chemische und optische Sensorik (2)
- 8 Zerstörungsfreie Prüfung (2)
- 1.0 Abteilungsleitung und andere (1)
- 1.1 Anorganische Spurenanalytik (1)
- 1.7 Organische Spuren- und Lebensmittelanalytik (1)
- 4.1 Biologische Materialschädigung und Referenzorganismen (1)
- 4.4 Thermochemische Reststoffbehandlung und Wertstoffrückgewinnung (1)
- 6.0 Abteilungsleitung und andere (1)
- 8.2 Zerstörungsfreie Prüfmethoden für das Bauwesen (1)
- 8.5 Röntgenbildgebung (1)
Eingeladener Vortrag
- nein (1)
We present how mesoporosity can be engineered in transition metal phosphate (TMPs) materials in a template-free manner. The method involves the transformation of a precursor metal phosphate phase, called M-struvite (NH4MPO4·6H2O, M = Mg2+, Ni2+, Co2+, NixCo1−x2+). It relies on the thermal decomposition of crystalline M-struvite precursors to an amorphous and simultaneously mesoporous phase, which forms during degassing of NH3 and H2O. The temporal evolution of mesoporous frameworks and the response of the metal coordination environment were followed by in situ and ex situ scattering and diffraction, as well as X-ray spectroscopy. Despite sharing the same precursor struvite structure, different amorphous and mesoporous structures were obtained depending on the involved transition metal. We highlight the systematic differences in absolute surface area, pore shape, pore size, and phase transitions depending on the metal cation present in the analogous M-struvites. The amorphous structures of thermally decomposed Mg-, Ni- and NixCo1−x-struvites exhibit high surface areas and pore volumes (240 m2 g−1 and 0.32 cm−3 g−1 for Mg and 90 m2 g−1 and 0.13 cm−3 g−1 for Ni). We propose that the low-cost, environmentally friendly M-struvites could be obtained as recycling products from industrial and agricultural wastewaters. These waste products could be then upcycled into mesoporous TMPs through a simple thermal treatment for further application, for instance in (electro)catalysis.
Nonporous corundum powder, known as an abrasive material in the industry, was functionalized covalently with protein binders to isolate and enrich specific proteins from complex matrices. The materials based on corundum were characterized by TEM, ESEM, BET, DLS, EDS, and zeta potential measurements. The strong Al-O-P bonds between the corundum surface and amino phosphonic acids were used to introduce functional groups for further conjugations. The common crosslinker glutaraldehyde was compared with a hyperbranched polyglycerol (PG) of around 10 kDa. The latter was oxidized with periodate to generate aldehyde groups that can covalently react with the amines of the surface and the amino groups from the protein via a reductive amination process. The amount of bound protein was quantified via aromatic amino acid analysis (AAAA). This work shows that oxidized polyglycerol can be used as an alternative to glutaraldehyde. With polyglycerol, more of the model protein bovine serum albumin (BSA) could be attached to the surface under the same conditions, and lower non-specific binding (NSB) was observed. As a proof of concept, IgG was extracted with protein A from crude human plasma. The purity of the product was examined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). A binding capacity of 1.8 mg IgG per gram of corundum powder was achieved. The advantages of corundum include the very low price, extremely high physical and chemical stability, pressure resistance, favorable binding kinetics, convenient handling, and flexible application.
Silver nanoparticles were generated based on citrate reduction in the ultrastructure of the sporopollenin biopolymer of Ambrosia artemisiifolia (ragweed) and Secale cereale (rye). The nanoparticles enable the acquisition of SERS spectra and thereby a vibrational characterization of the local molecular structure of sporopollenin.