Ciència dels Materials i Química Física: Envíos recientes
Mostrando ítems 101-120 de 1391
Analysis of embodied energy and product lifespan: the potential embodied power sustainability indicator
In the context of life cycle assessment sustainability indicators, this article proposes a new indicator that is related to the embodied energy, in order to assess the lifespan of products based on their components. The ...
Assessing salt-surfactant synergistic effects on interfacial tension from molecular dynamics simulations
In the recent years, many efforts have been carried out trying to comprehend how surfactants and salts interact among each other at the oil/brine interface to reduce the interfacial tension (IFT). To that end, the interfacial ...
Experimental study of different materials in fluidized beds with a beamdown solar reflector for CSP applications
Fluidized beds are particularly suitable for integration into Concentrated Solar Power (CSP) plants with beamdown reflectors. Due to the high mixing rates and heat diffusion typical of fluidized beds, they enable the highly ...
Problem-Based Learning in Graduate and Undergraduate Chemistry Courses: Face-to-Face and Online Experiences
he problem-based learning (PBL) methodology has been applied in a set of chemistry courses at the University of Barcelona to determine the main factors that are relevant to a satisfactory application of this educational ...
Pre-selection and assessment of green organic solvents by clustering chemometric tools
The study presents the result of the application of chemometric tools for selection of physicochemical parameters of solvents for predicting missing variables - bioconcentration factors, water-octanol and octanol-air ...
Epsomite as flame retardant treatment for wood: preliminary study
The effect of epsomite as flame retardant for wood has been investigated and compared with a commercial boron salt. Both flame retardants have been introduced into wood samples by vacuum impregnation. Epsomite is a hydrated ...
Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu
Joints of high thermal contact conductance and electrical insulation have been obtained by coating copper supports with thin alumina (Al2O3) layers (of 140–150 μm thickness). This has been achieved by a combination of ...
Highly efficient electrochemical and chemical hydrogenation of 4-nitrophenol using recyclable narrow mesoporous magnetic CoPt nanowires
Toxic nitro-compounds, such as 4-nitrophenol, are one of the most common wastewater industrial pollutants. Thus, efficient ways to neutralize them are actively pursued. Here novel procedures to degrade these types of ...
Optimization of electrocatalytic H2O2 production at pilot plant scale for solar-assisted water treatment
This manuscript summarizes the successful start-up and operation of a hybrid eco-engineered water treatmentsystem, at pilot scale. The pilot unit, with 100L capacity, has been devised for the efficient electrocatalyticproduction ...
Towards stable single-atom catalysts: Strong binding of atomically dispersed transition metals on the surface of nanostructured ceria
The interaction of a series of different transition metal atoms with nanoparticulate CeO2 has been studied by means of density-functional calculations. Recently, we demonstrated the ability of sites exposed on {100} ...
Charge transport at the protein-electrode interface in the emerging field of biomolecular electronics
The emerging field of BioMolecular Electronics aims to unveil the charge transport characteristics of biomolecules with two primary outcomes envisioned. The first is to use nature's efficient charge transport mechanisms ...
Room temperature methane capture and activation by Ni clusters supported on TiC(001): effects of metal-carbide interactions on the cleavage of the C-H bond
Methane is an extremely stable molecule, a major component of natural gas, and also one of the most potent greenhouse gases contributing to global warming. Consequently, the capture and activation of methane is a challenging ...
Removal of the drug procaine from acidic aqueous solutions using a flow reactor with a boron-doped diamond anode
This article reports the electrochemical advanced oxidation treatment of 2.5 L of acidic aqueous solutions with 0.320 mM of the drug procaine hydrochloride in 0.050 M Na2SO4 using a pre-pilot flow plant. This was equipped ...
Removal of 4-hydroxyphenylacetic acid from aqueous medium by electrochemical oxidation with a BDD anode: mineralization, kinetics and oxidation products
The degradation of 100 mL of solutions containing 4-hydroxyphenylacetic acid in 0.050 M Na2SO4 at pH 3.0 has been performed by anodic oxidation with electrogenerated H2O2 (AO-H2O2) using a stirred tank reactor equipped ...
New insights into diffusion in 3D crowded media by Monte Carlo simulations: Effect of size, mobility and spatial distribution of obstacles
Particle diffusion in crowded media was studied through Monte Carlo simulations in 3D obstructed lattices. Three particular aspects affecting the diffusion, not extensively treated in three-dimensional geometry, were ...
Multifunctional cork - alkali-activated fly ash composites: A sustainable material to enhance buildings' energy and acoustic performance
This work evaluates, for the first time, the possibility of producing multifunctional alkali-activated composites combining ultra-low density, low thermal conductivity, high acoustic absorption, and good moisture buffering ...
A highly stable metal-organic framework-engineered Fe2S/C nanocatalyst for heterogeneous electro-Fenton treatment: validation in wastewater at mild pH
Herein, the novel application of FeS2/C nanocomposite as a highly active, stable, and recyclable catalyst for heterogeneous electro-Fenton (EF) treatment of organic water pollutants is discussed. The simultaneous carbonization ...
Review of reactors with potential use in thermochemical energy storage in concentrated solar power plants
The aim of this study is to perform a review of the state-of-the-art of the reactors available in the literature, which are used for solid-gas reactions or thermal decomposition processes around 1000 C that could be further ...
Bottom-up dust nucleation theory in oxygen-rich evolved stars
Context. Aluminium oxide (alumina; Al2O3) is a promising candidate as a primary dust condensate in the atmospheres of oxygen-rich evolved stars. Therefore, alumina 'seed' particles might trigger the onset of stellar dust ...
Phase and microstructure control of electrodeposited Manganese Oxide with enhanced optical properties
Mn3O4 and Mn2O3 were synthesized by potentiostatic electrodeposition from a de-aerated manganese acetate and sodium sulfate electrolytic bath, followed by annealing. The electrodeposition parameters (including applied ...
