A5048688676- Lignin and Wood Chemistry
- Supercapacitor Materials and Fabrication
- Thermochemical Biomass Conversion Processes
- Electrocatalysts for Energy Conversion
- Biofuel production and bioconversion
- Fuel Cells and Related Materials
- Advanced Cellulose Research Studies
- Conducting polymers and applications
- Catalysis for Biomass Conversion
- Enzyme-mediated dye degradation
- Catalytic Processes in Materials Science
- Phytochemicals and Antioxidant Activities
- Adsorption and biosorption for pollutant removal
- Biochemical and biochemical processes
- Mesoporous Materials and Catalysis
- Advancements in Battery Materials
- Catalysis and Hydrodesulfurization Studies
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Nanomaterials for catalytic reactions
- Environmental and Industrial Safety
- Coal Combustion and Slurry Processing
- Electrochemical sensors and biosensors
- Plant-Derived Bioactive Compounds
- Flame retardant materials and properties
- Wood Treatment and Properties
Latvian State Institute of Wood Chemistry
2016-2025
University of Latvia
2019-2020
Riga Technical University
2007-2019
National Academy of Sciences of Ukraine
2019
Joint Institute for High Temperatures
2015
University of Haifa
2013
University of Aveiro
2013
Carbonization of biomass residues followed by activation has great potential to become a safe process for the production various carbon materials applications. Demand commercial use biomass-based is growing rapidly in advanced technologies, including energy sector, as catalysts, batteries and capacitor electrodes. In this study, were synthesized from hardwood using two carbonization methods, with H3PO4, KOH NaOH doping nitrogen. Their chemical composition, porous structure, thermal stability...
Fractionation of softwood and hardwood LignoBoost kraft lignins, using sequential extraction with organic solvents increasing hydrogen-bonding ability (dichloromethane, n-propanol, methanol), was carried out. Using SEC, analytical pyrolysis, FTIR UV/VIS spectroscopy, chemical methods, four fractions were obtained characterized in terms their yield, composition, functionality, lignin structural features, antioxidant properties. In tests free radicals (ABTS●+, DPPH●, O2●-) the ORAC (oxygen...
In this recent decade, great interest has risen to develop metal-free and cheap, biomass-derived electrocatalysts for oxygen reduction reaction (ORR). Herein, we report a facile strategy synthesize an electrochemically active nanocarbon material from the renewable biological resource, wood biomass. The ORR activity of catalyst was investigated in 0.1 M KOH solution by employing rotating disc electrode method. Scanning electron microscopy, transmission X-ray photoelectron spectroscopy, Raman...
Porous carbon materials (specific area over 2400 m2 g−1) were obtained from birch wood chips, the waste of its thermochemical processing water-insoluble lignocellulosic pyrolysis tar, and their mixture, by activation with NaOH at 800 °C. Raw carbonized two methods: (500 °C) hydrothermal (250 treatment. The elemental chemical composition precursors effect these parameters on materials’ structure porosity studied. Results study showed that carbonization method has little activated carbons’...
Lignin fractions having different molecular weights and varied chemical structures isolated from kraft lignins of both softwood hardwood via a sequential solvent fractionation technique were incorporated into tunicate cellulose nanofibers (CNF)—starch mixture to prepare 100% bio-based composite films. The aim was investigate the impact lignin structural diversity on film performance. It confirmed that lignin’s distribution in films dependent polarity solvents used for (acetone > methanol...
The study presents cellulose-based membranes derived from lignin-rich (unbleached high-kappa number softwood and hardwood) lignin-free (fully bleached softwood) kraft pulps for the removal of cationic dyes both simulated real aqueous environmental systems. Characterization techniques revealed that lignin-enriched exhibited enhanced wet mechanical properties a broader range functional groups. diversity inherent in lignin-containing resulted superior adsorption capacity such as Methylene Blue...
In this study we present an application of wood biomass - alder char as the carbon precursor for synthesis novel and sustainable nitrogen-doped activated supported nickel nanoparticle catalyst (AWC-Ni-N) hydrazine oxidation. For comparison, wood-based material doped with nitrogen only (AWC-N) was also synthesized. Extensive characterization, including SEM, Raman spectroscopy, XPS, XRD revealed catalysts' microstructure properties. Electrochemical testing demonstrated that AWC-Ni-N...
In this study we present an application of wood biomass—alder char—as the carbon precursor for synthesis novel and sustainable nitrogen-doped activated-carbon-supported nickel nanoparticle catalyst (AWC-Ni-N) hydrazine oxidation. For comparison, wood-based material doped with nitrogen only (AWC-N) was also synthesized. Extensive characterization, including SEM, Raman spectroscopy, XPS, XRD revealed catalysts’ microstructure properties. Electrochemical testing demonstrated that AWC-Ni-N...
Abstract The oxidative modification of Biolignin (BL) has been investigated to make it more suitable as an adsorbent for transition/heavy metals. BL is a by-product wheat straw organosolv process the production pulp, ethanol, and pentoses (CIMV S.A. pilot plant, Levallois Perret, France). It was subjected oxidation by polyoxometalate (POM) H 3 [PMo 12 O 40 ], aiming at increment oxygen-containing adsorption-active sites. POM performed under moderate conditions (1 bar, 60–90°C, 200°C) with...