Photocatalysis & sustainable feedstock utilization

Current research topics of the Wark group are:

1. Heterogeneous photocatalysis and photoelectrochemistry

• Systems for photocatalytic pollutant degradation, hydrogen formation and CO₂ reduction

• TiO₂ films with organized porosity and tailored modification

• Stoichiometrically optimized mixed metal oxide photocatalysts (perovskites, pyrochlores, spinels)

• Electrochemical deposition of tailored porous oxide films

2. Perovskite-based and dye-sensitized solar cells

• Development of morphology-optimized hybrid inorganic/organic perovskite layers for solar cells

• Scale-up of electrochemical deposition for solar cell fabrication

3. Ion conducting materials

• Tailor-made porous oxides and metal organic frameworks (MOFs) as proton conducting materials for fuel cell membranes

• Nanoparticle-based composites as fuel cell catalysts

• Porous TiO₂ and SnO₂ systems for Li⁺ ion conduction

4. Bioenergy and hydrothermal carbonization

• Hydrothermal carbonization of different waste biomasses, tailoring of the porosity of biochars for adsorption and catalysis, treatment of HTC water phases

• Separation of CO₂ from biogas by absorption

5. Process simulation

• Modelling of extractive separations of products from fermentation processes

• Modelling of degradation processes of fuel cells

• Method development

• Sol-Gel Synthese von dotierten Titanaten mit gezielt veränderter Stöchiometrie (Sol gel synthesis of doped titanates with specific modified stoichiometry), Josefine Hildebrand

• Synthese und Optimierung geordnet mesoporöser und mit ZnO-Nanapartikeln beladener TiO₂-Filme (Synthesis and optimization of ordered-mesoporous TiO₂-films loaded with ZnO nanoparticles), Enno Gent

• HTC-Prozesswasser Analyse (HTC-process water analytic), Tim Woriescheck

• Herstellung hochporöser Biokohlen mittels Hydrothermaler Carbonisierung (Production of highly porous biochars by application of hydrothermal carbonisation), Manuel Nowotny

• Entwicklung eines Anodenmaterials für Lithium-Ionen-Batterien (Development of anode material for lithium-ion batteries), Florian Meyer

• Ferrite für photochemische Wasserspaltung (Ferrites for photoelectrochemical water splitting), Sven Warfsmann

• Hydorthermale Carbonisierung in Gegenwart von Salz-Wasser-Gemischen (Hydrothermal carbonization in the presence of salt-water mixtures), Hendrik Multhaupt

• MOF-Polymer Hybridmembranen in Brennstoffzellen (MOF-polymer hybrid membranes in fuel cells), Konrad Wolkersdörfer

• Lösungsbasierte planare Perovskit-Solarzellen (Solution processed planar perovskite solar cells), Markus Becker

• Photocatalytic degradation of organophosphorous, carbamates and pyridazon on Titania/Zirconia nanocomposites and thin film, Anne Mbiri
• Synthesis of novel highly porous mixed metal oxide photocatalyst composites for visible-light-driven disinfection of wastewater and production of H₂, Mohammed Ismael
  

• Entwicklung eines segmentbasierten Modells zur Berechnung des realen thermodynamischen Verhaltens von Gemischen hochfunktioneller Moleküle (Method development of a segment based model for calculation of the real thermodynamic behavior of high functional molecules), Markus Graminsky

• Prozesssimulation von Biogasanlagen (Process simulation of biogas plants), Maximilian Jaugstetter

• Synthese von Ta₂O₅-Nanostrukturen zur photokatalytischen Wasserstoffproduktion (Synthesis of Ta₂O₅ nanostructures for photocatalytic hydrogen production), Arno Kohlsdorf

• Einlagerung von protisch ionischen Flüssigkeiten in metalorganische Gerüststrukturen (Intercalculation of protic ionic liquids in metall organic framworks), Raoul Schaper

• Synthese, Charakterisierung und photokatalytische Aktivität von Erdalkali-Metall-Titanate (Synthesis, characterisation and photocatalytic acitivity of earth-alkaline-metal-titanates), Christopher Rhein