NEW PATENT - Patent No. CZ307177
10. dubna 2018
Katalyzátor pro hydroizomerizaci alkanů C4-C7, jeho příprava a použití - Catalyst for hydroizomerizaci alkanes C4-C7, its preparation and use
Publication (UFCH JH): Semi-automatic spray pyrolysis deposition of thin, transparent, titania films as blocking layers for dye-sensitized and perovskite solar cells
10. dubna 2018
For proper function of the negative electrode of dye-sensitized and perovskite solar cells, the deposition of a nonporous blocking film is required on the surface of F-doped SnO2 (FTO) glass substrates. Such a blocking film can minimise undesirable parasitic processes, for example, the back reaction of photoinjected...
NEW PATENT - Patent No. CZ307189
5. dubna 2018
Method of producing perovskite structure catalysts, perovskite structure catalysts and their use for high temperature decomposition of N2O
Publication (UFCH JH): Catalytic Properties of 3D Graphene-Like Microporous Carbons Synthesized in a Zeolite Template
18. ledna 2018
The inherent properties of a single atomic carbon layer in graphene offer opportunities for the creation of catalytically active centers tailored on a molecular level on a support with high thermal stability and very high specific surface area. We demonstrate that organization of the two-dimensional system of the ca...
Publication (UFCH JH): Effect of Ethanethiolate Spacer on Morphology and Optical Responses of Ag Nanoparticle Array–Single Layer Graphene Hybrid Systems
27. listopadu 2017
Single layer graphene (SLG) and two-dimensional (2-D) plasmonic Ag nanoparticle arrays assembled by chemisorption of ethanethiol (ET) molecules (AgNPs-ET) were employed as components of two types of hybrid systems designed for surface-enhanced Raman scattering (SERS) spectral probing of SLG localized in the vicinity...
Publication (UFCH JH): Feasibility of application of iron zeolites for high-temperature decomposition of N2O under real conditions of the technology for nitric acid production
7. listopadu 2017
The long-term stabilities of a group of iron zeolites with MFI, *BEA, and FER structures and similar Fe/Al ratios were evaluated to assess their performance as catalysts for N2O decomposition. Conditions relevant for the application of the catalyst at the secondary level for N2O elimination, i.e., directly after the...
Publication (UFCH JH): Mastering the Wrinkling of Self-supported Graphene
30. srpna 2017
We present an approach that allows for the preparation of well-defined large arrays of graphene wrinkles with predictable geometry. Chemical vapor deposition grown graphene transferred onto hexagonal pillar arrays of SiO2 with sufficiently small interpillar distance forms a complex network of two main types of wrink...
Publication (UFCH JH): Surface-Enhanced Raman Spectroscopy of Graphene
29. srpna 2017
Surface-enhanced Raman scattering (SERS) exploits surface plasmons induced by the incident field in metallic nanostructures to significantly increase the Raman intensity. Graphene provides the ideal prototype two-dimensional (2d) test material to investigate SERS. Its Raman spectrum is well-known, graphene samples a...
Publication (UFCH JH): Surface enhanced infrared absorption spectroscopy for graphene functionalization on copper
23. srpna 2017
The monolayer form of CVD graphene is imposing crucial challenges in characterization of the targeted covalent functionalization due to the low amount of grafting moieties on the surface, which in turn hampers drawing conclusions about reactivity-properties relationships. Due to the growing interest in chemically mo...
Publication (UFCH JH): Reversibility of Graphene-Enhanced Raman Scattering with Fluorinated Graphene
31. července 2017
The effect of the amount of sp3 defects in graphene on the graphene enhanced Raman scattering (GERS) is studied using gradual fluorination of chemical vapour deposition grown graphene covering the Rhodamine 6G molecules. While upon a mild fluorination the GERS effect is preserved, the GERS enhancement disappears in ...
Publication (UFCH JH): Effect of Enhanced Accessibility of Acid Sites in Micromesoporous Mordenite Zeolites on Hydroisomerization of n-Hexane
19. července 2017
This paper describes a study of the nature and the accessibility of the acid sites in micromesoporous mordenite zeolites obtained by desilication and dealumination and analysis of their activity and selectivity in the hydroisomerization of n-hexane. Alkaline–acid, acid–alkaline–acid, and fluorination–alkaline–acid p...
Publication (UFCH JH): Superior activity of non-interacting close acidic protons in Al-rich Pt/H-*BEA zeolite in isomerization of n-hexane
5. března 2017
Skeletal isomerization of linear alkanes, an essential reaction for the production of gasoline, relies on environmentally questionable chlorinated catalysts, whose activity exceeds that of alternative zeolite catalysts. This work describes an attempt to understand relations between the local arrangement of active si...
Publication (UFCH JH): High temperature performance and stability of Fe-FER catalyst for N2O decomposition
10. ledna 2017
The scope of the study was to identify the performance and long-term stability of Fe-FER for N2O decomposition under conditions relevant for use as a secondary-level catalyst for N2O decomposition in the production of HNO3, i.e., in a complex gas phase mixture produced by NH3 oxidation and at temperatures between 75...