Joanna Kuncewicz

Joanna Kuncewicz
Jagiellonian University | UJ · Faculty of Chemistry

PhD

About

18
Publications
2,096
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
346
Citations

Publications

Publications (18)
Article
In the pre-Hispanic Central Andes, the mummified bodies of ancestors stood as the basis for the social and cosmic order. However, the mummification techniques in that region are still poorly understood, as there have been surprisingly few archaeometric studies on their technical aspects. For that reason, we selected two mummies of the Chancay cultu...
Article
Full-text available
The core-shell NaYb0.99F4:Tm0.01@NaYF4 upconverting particles (UCPs) with a high UV emission to apply in NIR-driven photocatalysis were synthesized. The influence of the Yb3+ doping concentration in NaYxF4:Yb0.99−xTm0.01 core particles, and the role of the NaYF4 shell on the upconversion emission intensity of the UCPs were studied. The absorption o...
Article
For the first time, photosensitization of selected alkaline titanates with surface charge transfer complexes has been proven. Activation of BaTiO3, SrTiO3 and CaTiO3 to visible as well as ultraviolet light has been achieved by impregnation with catechol, salicylic acid and 2,3-naphthalenediol. Simple modification of titanates with organic compounds...
Article
The preparation of ZnO nanocrystals with enhanced stability and photoluminescence intensity in an aqueous environment is a challenging task. We report on an one-pot two-step organometallic approach for the synthesis of processable alkyne-functionalized quantum-sized ZnO crystals and their efficient phase transfer protocol from an organic solvent to...
Article
Colloidal coordination compounds in the submicron range were synthesized from an Au(I) chloro carbene complex via the anti solvent procedure and stabilized by a surfactant shell of Tween 20. This compound was successfully applied as model system to monitor heterogeneous multiphase ligand substitution reactions at the solid-liquid interface.
Article
Colloidal coordination compounds in the submicron range were synthesized from an Au(I) chloro carbene complex via the anti solvent procedure and stabilized by a surfactant shell of Tween 20. This compound was successfully applied as model system to monitor heterogeneous multiphase ligand substitution reactions at the solid-liquid interface.
Article
Full-text available
Correction for ‘Rhodium-doped titania photocatalysts with two-step bandgap excitation by visible light—influence of the dopant concentration on photosensitization efficiency’ by J. Kuncewicz and B. Ohtani, RSC Adv., 2016, 6, 77201–77211.
Article
Development of photocatalysts active under visible light has been achieved through the modification of titania with rhodium (Rh) ions. Depending on the concentration of the precursor of Rh species, various crystalline phases and modification modes have been obtained. Lower Rh concentrations (below 0.5%) resulted in doped rutile particles, while hig...
Article
Full-text available
Titania particles modified with extremely small amount (< 0.01mol%) of rhodium species exhibited photocatalytic activity for oxidative decomposition of acetaldehyde in air under visible-light irradiation through two-photon band-gap excitation mechanism, resembling so-called Z-scheme with an external redox couple, using a built-in Rh(III)/Rh(IV) red...
Article
Titanium dioxide photosensitization may be achieved in various ways, involving surface modification with appropriate species. The photosensitization process requires a visible light-induced electron or hole injection into conduction or valence band, respectively. Efficiency of this process depends on electronic interaction between the photosensitiz...
Article
The photocatalytic activity of materials synthesized by titanium dioxide impregnation with chromates(VI) was studied in the processes of 4-chlorophenol oxidation and photocurrent generation. The materials show measurable activity when excited with visible light. Electron paramagnetic resonance (EPR) studies revealed the presence of chromium(V) spec...
Article
A photoinduced electron injection from the excited photosensitizer to the conduction band is usually a key step of photosensitization of wide bandgap semiconductors. The significance of this process has been recognized especially in the case of titanium dioxide, when applied as a visible light active photocatalyst or as an anode material in dye-sen...
Article
Titanium dioxide photosensitization to visible light can be observed in the presence of chromate(VI) ions adsorbed at the surface of TiO2. The resulting materials do not show, however, sufficient stability and photostability—chromium(VI) species desorb from the surface and can be reduced to chromium(III). The stability of such systems has been impr...
Chapter
Structure and reactivity of coordination compounds in their ground and excited electronic states are so rich and variable that have always been an inspiration for designing of an advanced materials and molecular functional systems. Thus obtained functionalized systems greatly contribute to the development of modern high-tech society. This paper pre...

Network

Cited By