A5082950377- Catalysis for Biomass Conversion
- Mesoporous Materials and Catalysis
- Catalysis and Hydrodesulfurization Studies
- Chemical Synthesis and Reactions
- Asymmetric Hydrogenation and Catalysis
- Nanomaterials for catalytic reactions
- Catalytic Processes in Materials Science
- Zeolite Catalysis and Synthesis
- Biofuel production and bioconversion
- Polyoxometalates: Synthesis and Applications
- Inorganic Fluorides and Related Compounds
- Lignin and Wood Chemistry
- Metal-Organic Frameworks: Synthesis and Applications
- Enzyme Catalysis and Immobilization
- Layered Double Hydroxides Synthesis and Applications
- Multicomponent Synthesis of Heterocycles
- Supercapacitor Materials and Fabrication
- Catalysis and Oxidation Reactions
- Oxidative Organic Chemistry Reactions
- Catalysts for Methane Reforming
- Graphene research and applications
- Ionic liquids properties and applications
- biodegradable polymer synthesis and properties
- Chemical Synthesis and Analysis
- Advanced Photocatalysis Techniques
University of Bucharest
2016-2025
Transylvania University of Brașov
2021-2022
HUN-REN Research Centre for Natural Sciences
2019
Institute of Materials and Environmental Chemistry
2019
Hungarian Academy of Sciences
2019
Institute of Catalysis and Petrochemistry
2015-2018
Faculty (United Kingdom)
2014-2017
School of Engineering and Architecture of Fribourg
2013
Humboldt-Universität zu Berlin
2008-2012
Romanian Academy
1999-2011
This review highlights the recent achievements in replacing precious-metal-based catalysts with nonprecious-metal-based two important syntheses: hydroamination and C–N coupling reactions. The reported improvements are discussed direct relation to nature of ligands, catalyst preparation methods, selection other additives. Syntheses using ligand-free also analyzed.
Abstract Background Artificial intelligence (AI) has the potential to transform our healthcare systems significantly. New AI technologies based on machine learning approaches should play a key role in clinical decision-making future. However, their implementation health care settings remains limited, mostly due lack of robust validation procedures. There is need develop reliable assessment frameworks for AI. We present here an approach assessing predicting treatment response triple-negative...
Novel magnesium fluorides have been prepared by a new fluorolytic sol-gel synthesis for fluoride materials based on aqueous HF. By changing the amount of water at constant stoichiometric HF, it is possible to tune surface acidity resulting partly hydroxylated fluorides. These possess medium-strength Lewis acid sites and, increasing water, Brønsted as well. Magnesium hydroxyl groups normally basic nature and only with this synthetic route create acidic groups. XRD, MAS NMR, TEM, thermal...
Ru(III)/functionalized silica-coated magnetic nanoparticles (Ru(III)-MNP) were proven to be a highly active, selective and easily recoverable catalyst for the oxidation of levulinic acid succinic under green conditions.
A biocatalytic synthesis of glycerol carbonate (GlyC), as an added-value product renewable glycerol, has been developed using a catalytic route in which (Gly) was reacting with dimethyl (DMC) the presence lipase under solvent-free conditions. The enzyme screening indicated from Aspergillus niger most efficient biocatalyst for GlyC synthesis. After optimization reaction conditions it established that best results corresponded to 12% (w/w) nigerlipase, : DMC molar ratio 1 10, incubation time 4...
Abstract Metal oxide nanoparticles supported on graphene exhibit high catalytic activity for oxidation, reduction and coupling reactions. Here we show that pyrolysis at 900 °C under inert atmosphere of copper(II) nitrate embedded in chitosan films affords 1.1.1 facet-oriented copper nanoplatelets few-layered graphene. Oriented (1.1.1) undergo spontaneous oxidation to render oriented (2.0.0) copper(I) These containing as catalyst turnover numbers can be three orders magnitude higher the...
A series of niobium-modified aluminum hydroxide fluorides (denoted Nb@AlF3), prepared via a fluorolytic sol–gel synthesis was investigated for the catalytic one-pot conversion cellulose to lactic acid. The structure new acid catalysts is result dispersion niobium fluoride in an matrix. calcination at relatively low temperature (350 °C) stabilized this structure. Catalytic performances terms yields are directly correlated with content.
Abstract In this paper, recent developments in the field of catalysts based on nanosized metal fluorides are presented with special focus exciting and promising magnesium fluoride systems. The majority these new catalyst systems originate from work authors fluorolytic sol–gel synthesis fluorides, which was developed by group. They selected a way as to highlight principles prospects approach high‐surface‐area, strongly distorted fluorides. This route opens, opinion authors, very broad range...
N-Containing graphenes have been found to act as catalysts for the selective wet oxidation of glucose succinic acid.
Currently, carbon quantum dots (CQDs) have been widely investigated as an enhancing photocatalytic component of various nanocomposites. In this study, hetero-structures containing associated to zinc oxide were prepared following two one-pot procedures: (i) a hydrothermal approach in which commercial ZnO was used carrier for CQDs; and (ii) the ZnO/CQDs samples produced situ by adding acetate aqueous suspension CQDs. CQDs advance low-temperature (LHT) treatment useless humins wastes glucose...
The primary objective of this research was to develop efficient solid catalysts that can directly convert the lactic acid (LA) obtained from lignocellulosic biomass into alanine (AL) through a reductive amination process. To achieve this, various based on ruthenium were synthesized using different carriers such as multi-walled carbon nanotubes (MWCNTs), beta-zeolite, and magnetic nanoparticles (MNPs). Among these catalysts, Ru/MNP demonstrated remarkable yield 74.0% for at temperature 200...
Ruthenium-based catalysts were prepared through a deposition–precipitation approach, taking beta zeolites with Si/Al ratios of 12.5, 18.5, and 150, respectively, as supports, 1–3 wt% loadings metal. Their activation was performed in the presence either H2 or NaBH4. The dispersion Ru species acid–base properties influenced by both preparation method protocol. reduced under flow presented well-dispersed Ru(0) RuOx nanoparticles, while reduction NaBH4 led to larger crystallites highly dispersed...
A new strategy for the preparation of biocatalysts based on enzyme immobilization was explored, leading to cross-linked aggregate onto magnetic particles (CLEMPA). Lipase from Aspergillus niger precipitated aqueous solution followed by cross-linking aggregates using glutaraldehyde as cross-linker. An optimization study has been carried out CLEMPA approach determine best experimental conditions both steps (i.e. precipitation and particles). Type concentration agent, type size particles, ratio...
The oxidation of 5-hydroxymethylfurfural (HMF) to valuable dicarboxylic acids has been investigated on magnetic-separable nanocatalysts in the search for selectivity enhancement. Cationic Ru(4 wt %)-Fe3O4@SiO2 catalyst led 2,5-furandicarboxylic acid (FDCA), with a 80.6% HMF conversion 92%. Replacing deposited noble metal transitional oneand NaOH n-butylamine ensured further advantages, such as increase stability and possibility tune other products. Thus, under similar reaction conditions,...