A5067577739- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Aerogels and thermal insulation
- Building materials and conservation
- Catalytic Processes in Materials Science
- Mesoporous Materials and Catalysis
- Nuclear materials and radiation effects
- Transition Metal Oxide Nanomaterials
- Pigment Synthesis and Properties
- Bone Tissue Engineering Materials
- Advanced Nanomaterials in Catalysis
- Chalcogenide Semiconductor Thin Films
- Free Radicals and Antioxidants
- Lignin and Wood Chemistry
- Nanotechnology research and applications
- Perovskite Materials and Applications
- Fermentation and Sensory Analysis
- Solar Thermal and Photovoltaic Systems
- Metal complexes synthesis and properties
- Silicone and Siloxane Chemistry
- Nanofluid Flow and Heat Transfer
- Machine Learning in Materials Science
- Gas Sensing Nanomaterials and Sensors
- Nanoparticles: synthesis and applications
- Biochemical and biochemical processes
Universidad de Cádiz
2013-2024
Hospital Universitario Puerto Real
2015-2018
Studies of the organic–inorganic hybrid perovskite, CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>, doped with Sn<sup>2+</sup>, Sr<sup>2+</sup>, Cd<sup>2+</sup>and Ca<sup>2+</sup>.
A good correlation was obtained between the electronic properties of Cu-doped anatase TiO2 by virtue both physical chemistry characterization and theoretical calculations. Pure were synthesized. The composition, structural properties, band gap energy using several techniques. method synthesis used produces TiO2, XRD, XPS Raman spectroscopy indicate that Cu atoms are incorporated in structure substitution Ti atoms, generating a distortion oxygen vacancies. In turn, synthesized samples...
A novel sol-gel synthesis, in which a surfactant acts to make the pore size of gel network more coarse and uniform, is shown provide an effective alternative for consolidation stone. The new mesoporous silica avoids main inconvenience current commercial consolidants, their tendency crack inside pores Since cracking xerogels well-known drawback process, synthesis presented here can be extended other applications. Finally, preliminary studies effectiveness surfactant-templated sol...
A challenging objective in monumental stone restoration is to synthesize crack-free silica materials for application as consolidants. Hydrophobicity also a valuable property such products; it important prevent the penetration of water because main vehicle by which agents decay enter pore structure stone. We report development hydrophobic nanomaterial with restoration. Specifically, organically modified silicate (ormosil) has been synthesized co-condensation tetraethoxysilane (TEOS) and...
This study introduces a new synthesis route for obtaining homogeneous chitosan (CS)-silica hybrid aerogels with CS contents up to 10 wt%, using 3-glycidoxypropyl trimethoxysilane (GPTMS) as coupling agent, tissue engineering applications. Aerogels were obtained the sol-gel process followed by CO2 supercritical drying, resulting in samples bulk densities ranging from 0.17 g/cm3 0.38 g/cm3. The textural analysis N2-physisorption revealed an interconnected mesopore network decreasing specific...
The sol-gel process has been found to be successful in applications for the conservation and restoration of stone. However, a well-known drawback materials obtained by this is their tendency crack during drying inside pores treated In article, we present an overview our current research centred on producing crack-free consolidating protecting building A novel synthesis, which surfactant acts as template make pore size gel network coarser more uniform, shown provide effective alternative...
This is an experimental and theoretical study of thulium doped TiO2 nanoparticles. From perspective, a method was used to synthesize thulium-doped nanoparticles in which Tm3+ replaces Ti4+ the lattice, our knowledge has neither been reported nor studied theoretically so far. Different proportions anatase rutile phases were obtained at different annealing temperatures, XRD Raman spectroscopy also revealed presence pyrochlore phase (Tm2Ti2O7) 1173 K. Thus, structure Tm-doped...
Abstract This study presents the experimental and theoretical of highly internally Al‐doped TiO 2 nanoparticles. Two synthesis methods were used detailed characterization was performed. There differences in doping crystallinity, but nanoparticles synthesized with different share common features. Anatase to rutile transformation occurred at higher temperatures Al doping. X‐ray photoelectron spectroscopy showed generation oxygen vacancies, which is an interesting feature photocatalysis. In...
Silica (SiO2)/chitosan (CS) composite aerogels are bioactive when they submerged in simulated body fluid (SBF), causing the formation of bone-like hydroxyapatite (HAp) layer. Silica-based hybrid improve elastic behavior, and combined CS modifies network entanglement as a crosslinking biopolymer. Tetraethoxysilane (TEOS)/CS is used precursors by employing sol-gel method assisted with high power ultrasound (600 W). Upon gelation aging, gels dried supercritical CO2 to obtain monoliths....
A Project Based Learning (PBL) methodology was used in the practical laboratories of Advanced Physical Chemistry department. The project type proposed simulates "real research" focusing on sol–gel synthesis and application obtained sol as a stone consolidant. Students were divided into small groups (2 to 3 students) simulate real-world research team. This procedure allowed students explore transition from until dry gel (xerogel), analyze properties sol, gel, xerogels (especially pore volume...
This study presents the use of TiO2 nanoparticles with Tm as photoelectrodes in DSSCs. The were annealed at 1173 K and predominant phase was rutile. XRD Raman spectroscopy revealed presence a crystalline pyrochlore mixed oxide Tm2Ti2O7. In turn, XPS confirmed Ti4+ Tm3+, so inclusion did not affect oxidation state Ti. UV–Vis spectra showed that led to new electronic states band gap. photoelectrode had positive effect, improving efficiency pure cells. increased by between 2.32% 3.16% when...
Abstract Photodegradation processes are of great interest in a range applications, one which is the photodecomposition pollutants. For this reason, analysing nanoparticles that improve efficiency these under solar radiation very necessary. Thus, study, TiO2 was doped with Mo and Cu using low-temperature hydrolysis as method synthesis. Pure x%MoS2/Cu/TiO2 were prepared, where x theoretical quantity MoS2 added (0.0%, 1.0%, 5.5%, 10.0%), setting nominal at 0.5 wt.%. The samples obtained...
We report a theoretical study of series Ru complexes interest in dye-sensitised solar cells, organic light-emitting diodes, and the war against cancer. Other metal centres, such as Cr, Co, Ni, Rh, Pd, Pt, have been included for comparison purposes. The metal–ligand trends organometallic chemistry those compounds are shown synergistically by using three molecular descriptors: quantum theory atoms molecules (QTAIM), electron localisation function (ELF) second-order perturbation analysis...
A nanocomposite powder of cerium and titanium oxide nanoparticles (NPs) was prepared using supercritical CO2. The characterization the obtained showed spheres or quasi-spheres between 68 145 nm, depending on conditions used. In all tests, N2 physisorption analysis that specific surface area samples increased 30 100 times more than precursors With ultimate goal composite powders for treatment oral diseases tissue regeneration, antimicrobial against S. aureus bacteria, present in skin...
A new strategy for enhancing the efficiency of TiO2 dye-sensitized solar cells (DSSCs) by doping foreign ion into lattice structure via low temperature hydrolysis process is reported. DSSCs are based on a semiconductor (i.e., TiO2), formed between photo-sensitized anode and an electrolyte. In order to reach high conversion efficiency, it important increase electron injection optical absorption. One promising solution decrease wide band gap structure. present work, Cu-doped nanoparticles thin...