Katedra anorganickej chémie

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    • Naša katedra v médiách

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      7.6.2024 - Pozvánka: 16. katedrový seminár

      We are pleased to invite you to the 16. department seminar on Friday 7th June at 11h30 in our meeting room CH2-213. Arshitha Madhusudhan (PhD student under the supervision of Dr. Monfort) is presenting her results. Below is the title of her talk along with a short abstract:

       

      Carbon-based adsorbents and iron vanadate catalysts for wastewaters treatment   

      Adsorption and advanced oxidation processes (AOPs) have been vastly studied methods for wastewaters treatment. Adsorption is a simple process with a relatively high ability to separate large range of pollutants from the water, thus being widely studied and implemented in real wastewaters treatment in the form of C-based adsorbents. To produce such adsorbents, the recycling of organic wastes through sustainable and ash-free method is a promising pathway. It also supports the transition to a circular economy by adding innovation to conventional wastewaters treatment plants. On the other hand, AOPs are a destructive method where the pollutants are degraded and even mineralized into smaller and harmless compounds. AOPs can be trigger via the use of transition metal oxide like iron vanadate (FeVO4) as photocatalyst and radical precursors activation.

      7.6.2024 - Pozvánka: 15. katedrový seminár

      We are pleased to invite you to the 15. department seminar on Friday 7th June at 11h00 in our meeting room CH2-213. Arash Ebrahimi (PhD student under the supervision of Dr. Motola) is presenting his results. His presentation will run also online on MS teams (click here). Below is the title of his talk along with a short abstract:

       

      Polyoxometalate-based porphyrinic MOFs as heterogenous catalysts   

      he inorganic-organic hybrid materials that incorporate organic metalloporphyrins and inorganic polyoxometalates (POMs) form a ground-breaking class of metal-organic frameworks (MOFs): the POM-based porphyrinic MOFs. This class can participate in numerous kinds of chemical reactions and mimic the activity of heterogeneous bio-, photo- and electro-catalysts. These MOFs can simultaneously take advantage of the combined uniqueness of the individual traits of POMs, porphyrins and MOFs, which display rich redox photochemistry, biomimetic ability and porosity, respectively. My talk aims to present the latest progress in porous porphyrinic POM-based MOFs, encompassing their categorization, fabrication and exploitation in the catalysis field.

      24.5.2024 - Pozvánka: 14. katedrový seminár

      We are pleased to invite you to the 14. department seminar on Friday 24th May at 11h30 in our meeting room CH2-213. Peter Belasic (BSc. student under the supervision of Dr. Zamocky) is presenting his results. Below is the title of his talk along with a short abstract:

       

      Metalloenzymes with iron coordinated in heme: peroxidases and catalases and their differences

      In living organisms two main classes of iron containing metalloenzymes occur named as peroxidases and catalases, respectively. Although some peroxidases can contain besides iron also manganese, vanadium, or even selenium most of them are heme peroxidases. In analogy, in some catalases manganese is found as a central cation but most known catalases contain also the heme prosthetic group with ferric cation. Both these large group of oxidoreductases significantly differ in their reaction mechanisms. In this presentation UV-vis spectroscopic methods will be presented that can distinguish between peroxidases and catalases.

      17.5.2024 - Pozvánka: 13. katedrový seminár

      We are pleased to invite you to the 13. department seminar on Friday 17th May at 11h30 in our meeting room CH2-213. Yilan Zeng (PhD student under the supervision of Dr. Motola) is presenting her results. Below is the title of her talk along with a short abstract:

       

      Intrinsic properties variation induced by annealing temperature - Characterizing TiO2 Nanoparticles

      The application of titanium dioxide (TiO2) nanoparticles in environmental remediation and photocatalytic degradation represents a significant frontier in materials science. This research investigates the synthesis of TiO2 nanoparticles through anodic oxidation, followed by a series of modifications achieved through annealing at ten distinct temperatures. The focus of the study is to elucidate the intrinsic properties variation of these nanoparticles, which are pivotal in enhancing their efficacy for specific environmental applications. Experiments conducted include the reduction and adsorption of hexavalent chromium, photocatalytic degradation of caffeine, and measurement of hydroxyl radicals production. Results highlight that controlled annealing significantly influences the nanoparticles’ structural, crystalline, and functional characteristics. This tailored thermal treatment optimizes the nanoparticles’ performance by balancing the enhancement of crystallinity and preservation of the anatase phase, thus boosting their photocatalytic efficiency. The seminar will discuss how these intrinsic variations, induced by the annealing process, potentiate the nanoparticles for advanced environmental applications. The exploration extends to a broader discussion on the implications of these findings and potential future research directions in nanoparticle-enhanced photocatalysis.

       

       

      17.5.2024 - Pozvánka: 12. katedrový seminár

      We are pleased to invite you to the 12. department seminar on Friday 17th May at 11h00 in our meeting room CH2-213. Janaki Devi Somasundaram (PhD student) is presenting her results. Below is the title of her talk along with a short abstract:

       

      Polyoxovanadates: Crystal Investigation of Novel Analogues and Exploration of Their Material Applications

      Polyoxometalates (POMs) are a distinct category of metal-oxo anions, clamped to each other by shared oxygen atoms, and thereby form 3D frameworks. In this presentation, the research findings are briefly presented in three sections. a)A series of five (4 Co + 1 Ni-based) novel decavanadates with their solution stability studies, water oxidation catalysis, cytotoxicity studies, and interaction of proteins, b) An interesting isopolyvanadate species [V13O38]12- coordinated to La(III), co-existing with a La-decavanadate with a unique coordination capacity c) High-pressure synthesis and crystal chemistry of a fresh Co-V mixed borate CoxV(5-x)B12O25(OH)y backed up by EDX analysis.

       

      26.4.2024 - Pozvánka: 11. katedrový seminár

      Wa are pleased to invite you to the 11. department seminar on Friday 26th January at 11h00 in our meeting room CH2-213. Our French colleague from the prestigious CNRS, Ing. Guillaume Voyard, Head of the Chromatography Analytical Platform of Institut de Chimie de Clermont-Ferrand is coming in the frame of the bilateral project Stefanik 2023 No. SK-FR-22-0002 (PI: Assoc. Prof. Olivier Monfort) to present theoretical aspects and case studies of liquid chromatography at the ICCF. Below is the title of his talk along with a short abstract (invitation):

       

      Liquid Chromatography: Theorical aspects and case studies at the Institute of Chemistry of Clermont-Ferrand (ICCF)

      Liquid chromatography is a widely used analytical method for separating, identifying, and quantifying compounds in a liquid mixture. The separation of the sample compounds is based on their affinity for a stationary phase and a mobile phase.

      The Chromatography Analytical Paltform at ICCF provides cutting-edge expertise in chemical compounds analysis through liquid chromatography. Equipped with advanced technologies such as high-performance liquid chromatography (HPLC) and Ion Chromatography coupled with Mass Spectrometry (IC-MS), the service offers precise and reliable analytical solutions for a wide variety of applications (pharmaceutical chemistry, environmental chemistry, materials chemistry, etc.). It also provides training and consultations to assist researchers in optimizing protocols and interpreting data. The Chromatography Analytical Paltform at ICCF is recognized as a trusted partner for high-quality research and analysis projects.

      In the present talk, I will introduce theoretical and technical aspects accompanied by concrete study examples, where you will appreciate the commitment to scientific excellence and the perfect scientific alignment between the research groups of ICCF and FNS CU Bratislava.

       

      26.4.2024 - Pozvánka: 10. katedrový seminár

      We are pleased to invite you to the 10. department seminar on Friday 26th April at 10h30 in our meeting room CH2-213. Zsuzsanna E. Mihalka (postdoc under the supervision of Prof. Noga) is presenting her results. Below is the title of her talk along with a short abstract:

       

      Pair-functions in electronic structure calculations

      The significance of electron pairs is evident for any chemist: we use them to describe the Lewis structure of molecules. Despite their conceptual importance, they are not as common as models relying on the one-electron (orbital) picture. Pair-function (geminal) based methods use electron pairs as building blocks, incorporating the intra-pair correlation in the wavefuncion. This makes them a good candidate for problems where strong correlation is present. In this talk, the basic properties of geminal based models will be discussed, along with their advantages as well as some of the associated challenges.

       

      15.4.2024 - Rozhovor s doc. Olivierom Monfortom, PhD.

      V rámci NextScience conference (20. marca 2024) poskytol Olivier Monfort rozhovor Centru vedecko-technických informácií SR (CVTI) pre projekt Alumni SK4ERA. Olivier Monfort hovoril o rozdieloch vo vedeckom výskume medzi Francúzskom a Slovenskom, ale vysvetlil aj hlavné smery svoju výskumu, ktoré rozvíja v M² skupine v KAgCH PRIF UK. Celý rozhovor si môžete pozrieť kliknutím sem!

       

      20.3.2024 - NextStep Science conference

      The NextScience conference is one of the biggest events about career opportunities in the field of natural sciences. You can registrate for free and this event is organized at the Science Park next to the FNS CU on Wednesday 20th March. In the complete and busy programme of the conference, Assoc. Prof. Olivier Monfort will give an invited talk about the research directions developped at the M² group, espcially on the protection of the water resource: an environmental challenge. You can also meet him and his team members at the M² group stand during the whole time of the conference. You can find more information on the website of the NextStep Science organization and on the social networks!

      8.3.2024 - Pozvánka: 9. katedrový seminár

      We are pleased to invite you to the 9. department seminar on Friday 8th March at 11h30 ONLINE (PIN to join MS team group: q87d1y6). Muhammad Bilal Hanif (postdoc under the supervision of Dr. Monfort) is presenting his results. Below is the title of his talk along with a short abstrac8.3.2024 - Pozvánka: 9. katedrový seminárWe are pleased to invite you to the 9. department seminar on Friday 8th March at 11h30 ONLINE (PIN to join MS team group: q87d1y6). Muhammad Bilal Hanif (postdoc under the supervision of Dr. Monfort) is presenting his results. Below is the title of his talk along with a short abstract:

       

      Design of highly efficient proton conducting electrolytes at lower sintering temperatures for solid oxide fuel cell applications

      This presentation explores innovative strategies for designing proton-conducting electrolytes with enhanced efficiency at reduced sintering temperatures, catering to the specific demands of Solid Oxide Fuel Cell (SOFC) applications. Through meticulous design and experimentation, the presented research work aims to overcome the challenges associated with high-temperature sintering, thereby contributing to the advancement of SOFC technology. The investigations involve the utilization of various materials, additives, and doping techniques to achieve optimal proton conductivity, thermal stability, and cost-effectiveness, paving the way for the development of more sustainable and commercially viable SOFCs.

      23.2.2024 - Pozvánka: 8. katedrový seminár

      We are pleased to invite you to the 8. department seminar on Friday 23rd February at 11h30 in our meeting room CH2-213. Shalu Atri (postdoc under the supervision of Dr. Monfort) is presenting her results. Below is the title of her talk along with a short abstract:

       

      Efficient catalysts for wastewaters treatment: the case study of CoFe2O4 decorated MXene

      In the frame of the environmental issues related to the efficiency of wastewaters treatment, sunlight-photoactivated 2D materials appear one of the most promising solutions. With this approach, decoration of 2D-Ti3C2Tx (MXene) by CoFe2O4 has been prepared using solvothermal method with different w/w% ratio. The prepared samples were investigated for caffeine degradation both in the dark and under UVA light in the presence of a green radical precursor i.e. peroxymonosulfate (PMS). MXene-CoFe2O4 exhibited promising efficiency for treatment of wastewaters from municipal WWTP BA-Petrzalka. The effect of catalyst dosage, pH, PMS concentration and light has been assessed along with the identification of the main reactive species.

      26.1.2024 - Pozvánka: 7. katedrový seminár

      Wa are pleased to invite you to the 7. department seminar on Friday 26th January at 11h30 in our meeting room CH2-213. Yosef Bayeh Yimer (postdoc under the supervision of Dr. Hrobarik) is presenting his results. Below is the title of his talk along with a short abstract:

       

      Spin-crossover Iron(II, III) complexes with various dimensionalities and coordination polymers based on Schiff base and bipyrazole pyridine ligands

      The present postdoctoral project work is concerned with the synthesis and characterization of spin-crossover iron(II, III) complexes having various dimensionalities based on Schiff base and bipyrazole pyridine  ligands. Schiff bases and bipyrazole pyridine have been selected because of their straight forward synthesis, easy tunability and tailoring possibility leading to the variation of the ligand field. The complexes are characterized by various spectroscopic techniques (i.e., elemental analysis, electrospray ionization–mass spectrometry (ESI-MS), Fourier-transform infrared spectroscopy (FTIR)), single crystal XRD as well as SQUID magnetometry. Molecular magnetic compounds showing abrupt SCO nature and wide thermal hysteresis are the main goal of the present postdoctoral. Such compounds can find immenseness applications in nano-technological devices e.g., molecular switches, display devices and memory storage.

      12.1.2024 - Pozvánka: 6. katedrový seminár

      Wa are pleased to invite you to the 6. department seminar on Friday 12th January at 11h30 in our meeting room CH2-213. Sridhar Gowrisankaran (PhD student under the supervision of Dr. Monfort) is presenting his results. Below is the title of his talk along with a short abstract:

       

      Transition metal ferrites for activation of AOPs for wastewaters treatment

      Transition metal ferrites with specific spinel oxides (CuFe2O4, CoFe2O4, NiFe2O4) have attracted the interest for studying the decontamination of wastewater using advanced oxidation processes (AOPs) like photocatalysis and Fenton-based processes. The present work involves the single-pot preparation of spinel ferrites in the form of powders, their characterization and their application in the treatment of real wastewaters. The controversial activation mechanism of AOPs by these ferrites has been also elucidated.

      1.12.2023 - Pozvánka: 5. katedrový seminár

      Wa are pleased to invite you to the 5. department seminar on Friday 1st December at 11h30 in our meeting room CH2-213. Lenin Thulluvan Valappil (PhD student under the supervision of Dr. Motola) is presenting his results. Below is the title of his talk along with a short abstract:

       

      Synthesis of anodic TiO2 nanostructures in fluoride-free electrolytes for environmental applications

      The current study explores the growth of anodic TiO2 nanostructures using fluoride-free electrolytes and their application in the photocatalytic degradation of organic pollutants. This includes the environmental-friendly synthesis of flower-like TiO2 nanostructures in chloride electrolytes and the single-pot synthesis of copper oxide-decorated TiO2 nanotube powder utilizing Rapid Breakdown Anodization (RBA). Furthermore, the formation of TiO2 nanotube arrays using electrolytes consisting of rare earth nitrates was investigated.

      10.11.2023 - Pozvánka: 4. katedrový seminár

      Wa are pleased to invite you to the 4. department seminar on Friday 10th November at 11h30 in our meeting room CH2-213. Prince Yadav (PhD student under the supervision of Dr. Hrobarik) is presenting his results. Below is the title of his talk along with a short abstract:

       

      Boron Complexes of Heteroarene Compounds Featuring Intramolecular Charge Transfer for NLO Applications

      Heteroaromatic scaffolds are frequently used as key building blocks of chromophores with an extensive intramolecular charge-transfer displaying large nonlinear optical (NLO) response. A special group of its own among heteroarene compounds are boron-containing dyes derived from 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene, named shortly also as boron-dipyrromethene (BODIPY). BODIPY-derived dyes are often strongly emissive and employed as fluorescent markers, but they are also used as active components in optoelectronic materials/devices, such as organic light emitting diodes (OLED) or dye-sensitized solar cells (DSSC). In this regard, the aim of my PhD thesis is to design and prepare a novel class of diverse BODIPY-like photosensitizers derived from photochemically stable push-pull benzothiazoles and/or widely used diketopyrrolopyrroles (DPP) and study their properties and potential usage in various NLO applications, such as high-resolution bioimaging, two-photon-excited photodynamic treatment, theranostics or near-infrared light (NIR) activated photocatalysis.

      8.11.2023 - Cena Dionýza Ilkoviča

      RNDr. Chrappová z našej katedry sa stala absolútnou víťazkou Ceny Dionýza Ilkoviča za rok 2023 za popularizáciu slovenských VŠ medzi motivovanými stredoškolákmi a prácu so stredoškolskou talentovanou mládežou v oblasti prírodných vied.


      Viac informácií v médiách:
      https://nadaciadi.sk/pribehy-ucitelov/jana-chrappova-vitazka-cdi-2023/
      https://www.aktuality.sk/clanok/nRVHZmg/cenu-dionyza-ilkovica-ziskala-chemicka-jana-chrappova/
      https://domov.sme.sk/c/23241651/cenu-dionyza-ilkovica-ziskala-chemicka-jana-chrappova.html

      20.10.2023 - Pozvánka: 3. katedrový seminár

      Wa are pleased to invite you to the 3. department seminar on Friday 20th March at 11h30 in our meeting room CH2-213. Yogeswara Rao Pateda (PhD student under the supervision of Dr. Rakovsky) is presenting his results. Below is the title of his talk along with a short abstract:

       

      Mechanistic information on the RuIII(edta) reaction with H2O2: The formation of nanoparticles

      In this work, the possibility of the production of RuV(edta)(O) nanoparticles is presented using K[Ru(Hedta)Cl]·2H2O as precursor that was prepared. RuIII(edta) nanoparticles were first obtained by precipitating the precursor complex in an anti-solvent, i.e., dry ethanol, under stirring. These nanoparticles were dispersed in ethanol and reacted with H2O2 under stirring at room temperature to produce RuV(edta)(O) nanoparticles. EDX analysis confirmed the formation of RuV(edta)(O) while SEM and DLS analyses revealed the nanometer size of the product. The UV/Vis spectra of the nanoparticles dissolved in water demonstrate an absorption band at 390 nm which is characteristic of the RuV(edta)(O). These results come up with evidence of a heterogenous multiphase oxidation process of a RuIII complex at the solid-liquid interface. In addition, the reaction of RuV(edta)(O) nanoparticles formation was monitored as a function of an excess of H2O2 (over RuIII(edta)) and stirring time. The results show that a change in absorbance at 390 nm with increasing stirring time and H2O2 concentration.

       

      6.10.2023 - Pozvánka: 2. katedrový seminár

      Wa are pleased to invite you to the 2. department seminar on Friday 6th October at 11h30 in our meeting room CH2-213. Viktoriia Liapun (PhD student under the supervision of Dr. Motola) is presenting her results. Below is the title of her talk along with a short abstract:

       

      Modified titanium dioxide-based nanostructures for Cr(VI) and CO2 reduction, and caffeine degradation

      In recent years, semiconductor materials, particularly modified titanium dioxide-based nanostructures, have emerged as versatile catalysts in the fields of environmental remediation and sustainable energy. 

      On one hand, the industrial revolution has resulted in the overexploitation of raw materials, leading to the subsequent release of large amounts of inorganic and organic pollutants into the environment. Cr(VI) and caffeine are considered emerging pollutants in water, causing negative effects on water quality and living organisms. On the other hand, fossil fuel energy has become integral to world development and is often considered an irreplaceable energy source in modern society. However, excessive consumption has resulted in an energy crisis and environmental pollution. The main driver of global warming is the growing amount of CO2, mainly due to industrial manufacturing and transportation. The photocatalytic conversion of greenhouse CO2 gas to chemical fuels such as CH4 and CO is a promising way to address the future path to renewable and clean energy generation, as well as environmental remediation.  

      In my presentation, I will expose the different modified titanium dioxide-based catalysts I prepared and that I tested for photocatalytic Cr(VI) and CO2 reduction and caffeine degradation. The results showed high potential and paved the way for future investigations.  

      26.4.2023 - Študentská vedecká konferencia

      Naša doktorandka Arshitha Madhusudhan sa zúčastnila na ŠVK PriF UK (eSVK2023), kde vystúpila s prednáškou na tému "Effect of hydrochar on the photo-induced activity of magnetite for the removal of Rhodamine B". Za vynikajúcu ústnu prezentáciu získala cenu Slovenskej chemickej spoločnosti.

      Tu je abstrakt jej príspevku:

      Water pollution is one of the major issues faced in the current time due to the limited resource. One of the easiest and most efficient ways of removing persistent water pollutants are using Advanced Oxidation Processes (AOPs) as they generate highly reactive radicals that oxidize and mineralize the pollutants. A composite of hydrochar and Fe3O4 was synthesized and used for adsorption and degradation of Rhodamine B (RhB) in presence of solar-like radiation. This was conducted at various pH and it was determined that natural pH was the best to achieve maximum removal of RhB. Also, the extent of removal using composite was compared to Fe3O4 and hydrochar.

      22.9.2023 - Druhý francúzsko-slovenský workshop

      V rámci projektu SOLAREM spolufinancovaného APVV a Francúzskym inštitútom na Slovensku (zmluva č. SK-FR-22-0002 a PHC č. 49871WH) vystúpia s pozvanými prednáškami prof. Marcello Brigante (dekan Fakulty chémie, Université Clermont Auvergne, FR) a Ing. Guillaume Voyard (vedúci Chromatografickej analytickej platformy, Institut de Chimie de Clermont-Ferrand, FR) na témy "Environmental photochemistry in water media at ICCF" a "Interest and use of IC-MS at ICCF". Ak vás tieto témy zaujímajú z  blízka alebo zďaleka, ste veľmi vítaní.

      Kedy: pondelok 22.9.2023

      Kde: CPS+ (B1-322)

      Viac info: tu

      Kontakt: olivier.monfort@uniba.sk

      26.10.2022 - "Druhý domov našiel v obľúbených Vajnoroch"

      Mladý francúzsky vedec Olivier Monfort žijúci na Slovensku sa usadil vo Vajnoroch.  Pochádza z Bretónska, čo je oblasť na západe Francúzska  pri Atlantickom oceáne, z  dediny Séné pri okresnom meste Vannes v Morbihanskom zálive. Pôsobí na Katedre anorganickej chémie Prírodovedeckej fakulty Univerzity Komenského v Bratislave, kde pracuje ako vedec i pedagóg.
      Viac info: tu

      12.6.2022 - Fotochémia: riešenie pre zdravie našej planéty?

      Dr. Olivier Monfort, jeden z výskumných pracovníkov na Katedre anorganickej chémie PRIF UK, napísal článok o výzvach environmentálnej fotochémie. Článok si môžete prečítať na aktuality.sk.

      30.9.2021 - Falling Walls Lab Slovakia

      Vo štvrtok 30. septembra 2021 sa Dr. Olivier Monfort umiestnil na 2. mieste vo finále súťaže Falling Walls Lab Slovakia so svojím vystúpením o prelomení stien environmentálnej fotochémie. Nižšie uvádzame abstrakt jeho prezentácie:

      The water is undergoing a huge antropogenic stress worldwide. Therefore, the protection of this natural resource along with the treatment of wastewaters is a crucial problematic. Photochemically versatile materials appear a promising solution for efficient removal of emerging pollutants in wastewaters. The treated water can be reused, thus integrating the circular economy. My presentation aims to proof the concept of photochemical versatility using sustainable inorganic materials and to highlight the application of such materials in the degradation process of contaminants of emerging concern contained in real wastewaters.

      Viac info: tu

      13.9.2021 - Prvý francúzsko-slovenský workshop

      Prvý francúzsko-slovenský workshop "Inorganic Compounds for Environmental Applications" sa organizuje na PriF UK v rámci programu PARCECO, ktorý financuje francúzske ministerstvo pre vysoké školstvo, výskum a inovácie (MESRI). Renomovaní vedci predstavia svoje najnovšie vedecké výsledky v oblasti sanácie životného prostredia, keďže ide o kľúčovú výzvu na celom svete. Okrem toho je cieľom workshopu nadviazať a upevniť budúcu spoluprácu medzi francúzskymi a slovenskými výskumníkmi a senzibilizovať akademikov a študentov v oblasti ochrany životného prostredia.

      Kedy: pondelok 13.9.2021

      Kde: CPS+ (B1-322)

      Viac info: tu

      Kontakt: olivier.monfortuniba.sk