A5031481049- Advanced Photocatalysis Techniques
- Crystallization and Solubility Studies
- Advanced Nanomaterials in Catalysis
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Copper-based nanomaterials and applications
- Polyoxometalates: Synthesis and Applications
- Oxidative Organic Chemistry Reactions
- Catalytic Processes in Materials Science
- Magnetism in coordination complexes
- Crystallography and molecular interactions
- Supercapacitor Materials and Fabrication
- Catalysis and Hydrodesulfurization Studies
- Nanocluster Synthesis and Applications
- Graphene research and applications
- Electrocatalysts for Energy Conversion
- Adsorption and biosorption for pollutant removal
- TiO2 Photocatalysis and Solar Cells
- Porphyrin and Phthalocyanine Chemistry
- Perovskite Materials and Applications
- Metal-Catalyzed Oxygenation Mechanisms
- Hydrogels: synthesis, properties, applications
- Advanced Materials and Mechanics
- Thermochemical Biomass Conversion Processes
Max Planck Institute of Colloids and Interfaces
2021-2024
Universidade Federal de Minas Gerais
2013-2023
Abstract The hydrogen evolution reaction (HER) is a complex involving many interdependent physicochemical steps. Highly ordered carbon nitride‐based materials, such as Na‐PHI and K‐PHI, display some of the highest activities for H 2 among due to their electronic properties, but also presence cyanimide terminations, which favors charge transfer Pt cocatalyst nanoparticles (NPs). For highly optimized semiconductor structures, necessity control improve other steps photocatalytic process becomes...
Abstract Renewable‐electricity‐powered carbon dioxide (CO 2 ) reduction (eCO R) to high‐value fuels like methane (CH 4 holds the potential close cycle at meaningful scales. However, this kinetically staggered 8‐electron multistep suffers from inadequate catalytic efficiency and current density. Atomic Cu‐structures can boost eCO R‐to‐CH selectivity due enhanced intermediate binding energies (BEs) resulting favorably shifted d‐band centers. In work, 2D nitride (CN) matrices, viz....
Photocatalysis provides a sustainable pathway to produce the consumer chemical H2O2 from atmospheric O2 via an oxygen reduction reaction (ORR). Such alternative is attractive replace cumbersome traditional anthraquinone method for synthesis on large scale. Carbon nitrides have shown very interesting results as heterogeneous photocatalysts in ORR because their covalent two-dimensional (2D) structure believed increase selectivity toward two-electron process. However, efficient and scalable...
We construct a carbon/KPHI heterostructure for high-performance photocatalytic H 2 and O evolution. The optimal 0.3Ad/KPHI hybrid showed an outstanding evolution rate of 738 μmol h −1 g cat production 3.94 mmol .
Single-atom catalysis is a field of paramount importance in contemporary science due to its exceptional ability combine the domains homogeneous and heterogeneous catalysis. Iron manganese metalloenzymes are known be effective C─H oxidation reactions nature, inspiring scientists mimic their active sites artificial catalytic systems. Herein, simple versatile cation exchange method successfully employed stabilize low-cost iron single-atoms poly(heptazine imides) (PHI). The resulting materials...
In this work, we investigated a series of carbon nitride-based nanomaterials (CNs), i.e., H-PHI, mpg-C3N4, PCN, Na-PHI, Mg-PHI, CN-OA-m, and LiK-PHI, as candidate catalysts for biodiesel synthesis. The heterogeneous catalyst design based on CNs, with tunable catalytic sites inexpensive syntheses, can allow production to become more sustainable process, helping meet future energy demands. Transesterification canola oil methanol using LiK-PHI catalyst, under the optimized conditions, displayed...
Adding single metal atoms to graphitic carbon nitrides alters their properties, impacting use in photocatalysis.
This work refers to the sustainable production of high-value-added products from biomass residues for application in removal environmental contaminants.
The recent findings on the fundamental understanding of activity carbon nitride-based materials in hydrogen evolution reaction (HER) allow to design rationally photocatalytic systems with improved activities.
In this study, a cost-effective and stable heterogeneous acidic carbocatalyst (CZnLS950) derived from Na-lignosulfonate (LS), side product of the paper industry, was employed to produce hydrocarbon fuels through pyrolysis waste cooking oil (WCO) crude natural-oil extracted sunflower seeds, aligning with principles circular economy. To enhance its practicality in industrial settings, catalyst synthesized pellet form, enabling easy separation biofuel produced during reaction. CZnLS950...
A nanocomposite photocatalyst with engineered interfaces between Au and defect enriched carbon nitride for efficient pure water splitting under solar irradiation.
C–H activation of hydrocarbons is extremely challenging, especially in short-chain like propane. In industry, propane first converted to propylene mostly by steam cracking, which only oxidized acetone the cumene process, yielding and phenol. this work, we show that simple FeCl3 salt acetonitrile photocatalyzes oxidation at room temperature under aerobic conditions visible-light irradiation. We achieved 100% conversion with 67% selectivity after 4 h irradiation TON up 600. Mechanistic...
Study of the Fe<sup>III</sup> dinuclear metallacycle complex as a size selective adsorbent to amines with excellent capacity adsorb ammonia.
A discrete dicopper(II) system, [Cu(bipy)(H2mpba)]2·2H2O (1), and its isomeric chain, [Cu(bipy)(H2mpba)]·dmso (2) [bipy = 2,2′-bipyridine H4mpba N,N′-1,3-phenylenebis(oxamic acid)], were obtained by modifying the ratio of H2O–dmso solvent mixture, their interconversion was also monitored changing solvents during synthesis. The play an essential role in formation crystallization these complexes, presenting different dimensionalities connectivities. double deprotonated H2mpba2− adopts...
In this work, selective interactions between the constituents of composite CNT@MnCu (2) prepared using carbon nonotubes (CNTs) (1) and heterobimetallic chain [MnCu(opba)]n (MnCu), opba = o-phenylenebis(oxamate), were studied mainly by resonance Raman spectroscopy high-resolution transmission electron microscopy (HRTEM). An apparent interaction CNTs MnCu complex with wrapping former was observed in images. The data suggest that interations are selective, occurring metallic independently...
Multifunctional hydrogel based on glycerol/citric acid presents absorptive and reducing capacities, affording a hybrid gel containing AgNPs in the matrix.
5-hydroxymethylfurfural (HMF) oxidation in aqueous media using visible photocatalysis is a green and sustainable route for the valorization of lignocellulosic biomass derivatives. Several semiconductors have already been applied this purpose; however, use Poly(heptazine imides), which has high crystallinity special cation exchange property that allows replacement held between layers C3N4 structure by transition metal ions (TM), remains scarce. In study, PHI(Na) was synthesized melamine/NaCl...
Solar-to-chemical conversion via photocatalysis is of paramount importance for a sustainable future. Thus, investigating the synergistic effects promoted by light in photocatalytic reactions crucial. The tandem oxidative coupling alcohols and amines an attractive route to synthesize imines. Here, we unravel performance underlying reaction pathway visible-light-driven benzyl alcohol aniline employing Au/CeO2 nanorods as catalysts. We propose alternative this transformation that leads improved...
An unexpected heterobimetallic ring {CoII6CuII6} was synthesised by slow diffusion in water under ambient conditions and its dc magnetic properties were analysed through an effective Hamiltonian the light of DFT type calculations.
The rapid integration of green, clean, and renewable technologies in a circular economy requires stable, abundant, visible-light responsive absorbers. ideal solar energy harness conversion process uses single material that fulfills photon absorption, exciton dissociation, carrier migration, surface activity requirements. Heterojunctions enable multiple charge pathways, inhibiting recombination while promoting transfer across the heterointerface. This study pinpoints synergy combining...
Hybrid oxidation catalysts and adsorbent materials containing niobium(<sc>v</sc>)–copper(<sc>ii</sc>) for the decontamination of real wastewater organic pollutants are reported herein.