Igor Djerdj

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• Prof. Dr.
• Professor (Full) at University of Osijek

Rare-earth high-entropy oxides are a new promising class of multifunctional materials characterized by their ability to stabilize complex, multi-cationic compositions into single-phase structures through configurational entropy. This feature enables fine-tuning structural properties such as oxygen vacancies, lattice distortions, and defect chemistr...

Rare-earth high-entropy oxides are a new promising class of multifunctional materials characterized by their ability to stabilize complex, multi-cationic compositions into single-phase structures through configurational entropy. This feature enables fine-tuning structural properties such as oxygen vacancies, lattice distortions, and defect chemistr...

High-entropy oxides with five different metal content in the lattice lead to a striking carbon dioxide photoactivator catalyst toward carbon monoxide and methanol production.

Herein, we investigate the potential of nanostructured high-entropy oxides (HEOs) for photocatalytic CO 2 hydrogenation, a process with significant implications for environmental sustainability and energy production. Several cerium-oxide-based rare-earth HEOs with fluorite structures were prepared for UV-light driven photocatalytic CO 2 hydro-genat...

In continuation of our efforts to fully utilize eggshell waste (ESW), here we report the possibility of ESW transformation to calcium chloride (CaCl2) anhydride of food-grade additive purity and eggshell membranes (ESMs) as potential enzyme immobilization carriers. ESW chemical transformation by 5% (w/v) hydrochloric acid to CaCl2 solution and ESM...

CeNiO3 has been reported in the literature in the last few years as a novel LnNiO3 compound with promising applications in different catalytic fields, but its structure has not been...

Triple perovskite Triboelectric nanogenerator.

Five different rare‐earth‐based nanocrystalline high entropy oxides (HEOs) with fluorite structure and average crystallite sizes between 6 and 8 nm are prepared and their photocatalytic behavior toward azo dye degradation and photoelectrochemical water splitting for hydrogen generation is examined. The cationic site in the fluorite lattice consists...

Four iron-based triple tungstate and tellurate perovskites have been synthesized in a nanocrystalline form using a simple sol-gel citrate route: Sr3Fe2WO9 (SFWO), Ba3Fe2WO9 (BFWO), Sr3Fe2TeO9 (SFTO), and Ba3Fe2TeO9 (BFTO). Strontium-based compounds crystallize in tetragonal space group I4/m, while barium-based compounds crystallize in hexagonal spa...

Efficient Lewis-acid-catalyzed direct conversion of aldehydes to 1,2-diketones in the liquid phase was enabled by using newly designed and developed ceria–zirconia-based high-entropy oxides (HEOs) as the actual catalysts. The synergistic effect of various cations incorporated in the same oxide structure (framework) was partially responsible for the...

Structural characterization of novel Fe(III) basic acetate with 1,3,5,7-tetraazaadamantane (hexamine – HEX), [Fe3(μ3-O)(OAc)6(H2O)3)](NO3)(HEX)2(H2O)5] (1), revealed a molecular structure typical for Fe(III) basic carboxylates, with a triangular array formed by three iron atoms being equilateral and with an uncoordinated hexamine molecule and nitra...

A modified aqueous sol-gel reaction is utilized to synthesize a triple perovskite with a composition Sr3CO2WO9 (SCWO). The structural analysis conducted at room temperature reveals the presence of the cubic phase with space group Fm-3m. The microstructure of the as-synthesized SCWO particles shows a different size of particles depicting a polycryst...

The influence of the cation of imidazolium‐derived ionic liquids (ILs) on a low‐temperature solution‐based synthesis of hexagonal tungsten bronze (HTB) type Ti(OH)OF ⋅ 0.66 H2O and bronze‐type TiO2(B) is investigated. The IL (Cxmim BF4) acts as solvent and also as reaction partner with respect to the decomposition of [BF4]−, releasing F−. In the pr...

The main objective of this work was to synthesize phase pure double perovskites Ba2NiTeO6 (BNTO) and Ba2NiWO6 (BNWO) in nanocrystalline form and to reveal the impact of nanocrystallinity onto their magnetic and dielectric properties. The studied double perovskites were synthesized in nanocrystalline form by employing citrate sol-gel route. A detail...

Deactivation of CeO2‐based catalysts in the HCl oxidation reaction proceeds via selective bulk chlorination of the active CeO2 component to form CeCl3×nH2O. We study the reactivation of two bulk‐chlorinated CeO2‐based Deacon catalysts by oxygen treatment at 430 °C, namely pure CeO2 and 20 mol % of CeO2 supported on preformed ZrO2 particles (20CeO2@...

Double perovskites have been extensively studied in materials chemistry due to their excellent properties and novel features attributed to the coexistence of ferro/ferri/antiferro-magnetic ground state and semiconductor band gap within the same material. Double perovskites with Sr2NiMO6 (M = Te, W) structure type have been synthesized using simple,...

Preparation of a new, mixed-cationic layered CuIBiOI was prepared and its non-photocatalytic catalytic properties were explored. This solid substance had BiOI-like, lamellar and deflected structure resulting from CuI ion incorporation in the Bi2O2 layers. The as-prepared substance was fully characterized by XRD, Raman, far IR, UVDR, XP spectroscopi...

The Pechini method allows for compositional and structural control of mixed ruthenium-iridium powder samples. Extensive characterization reveals that the calcination step leads to agglomerates with a metallic core that is encapsulated by the mixed RuxIr1 xO2 oxides. In the composition range of 21 mol% up to 74 mol% of ruthenium the metal core revea...

CeO2 is a promising material in the catalytic retrieval of Cl2 from HCl by oxidation with O2 due to its beneficial redox properties (Ce3+/Ce4+) and accompanied oxygen storage capacity (OSC). Two options to tailor the OSC is the usage of dopants and nanostructuring. In this work, we report the synthesis of mesoporous doped Ce0.9M0.1O2 (M = Zr, Gd, P...

Complex perovskites have attracted extensive attention due to their fascinating physical properties and novel features owing to the coexistence of the ferro/ferri-magnetic ground state and semiconducting behavior in the single material. Herein, the triple perovskite Sr3Co2WO9 (SCWO) has been successfully synthesized for the first time in the nanocr...

In this work a facile ionic liquid-based-synthesis towards titanium oxy hydroxy fluoride Ti(OH)OF is presented. The synthesis is carried out as a one-pot synthesis at a relatively low temperature (95 °C). The ionic liquids are used as both reaction medium and fluorination source. Powder X-Ray Diffraction (PXRD) followed by Rietveld refinement revea...

Dry impregnation of CeO2 on ZrO2 particles ([email protected]) and calcination at 600 °C for 5 h results in a highly dispersed layer of the catalytically active phase CeO2 with an enriched concentration of Ce3+. The distinct morphology of [email protected] is responsible for the high (specific) activity in the gas-phase oxidation of HCl (Deacon rea...

The promising tin perovskite solar cells (PSCs) suffer from the oxidation of Sn²⁺ to Sn⁴⁺, leading to a disappointing conversion efficiency along with poor stability. In this work, phenylethylammonium bromide (PEABr) was employed to form an ultrathin, low‐dimensional perovskite layer on the surface of the FASnI3 (FA=formamidinium) absorber film to...

Specific structure of perovskite compounds provides them with various interesting properties which vary from magnetic and electric properties to magnetic frustration and half-metallicity. Double A2Ni(Te, W)O6 and triple A3(Fe, Co)2(W/Te)O9 (A=Sr, Ba) perovskites have been prepared in nanocrystalline form using a modified aqueous sol–gel citrate rou...

Specific structure of perovskite compounds provides them with various interesting properties which vary from magnetic and electric properties to magnetic frustration and half-metallicity. Since it is hard to stabilize Mn3+ cation in solid form, it is important to use solution chemistry methods. Sr3Mn2(W/Te)O9 triple perovskites have been prepared b...

Specific structure of perovskite compounds provides them with various interesting magnetic, dielectric and optical properties. It has become very trendy to alter particle size instead of altering chemical composition since the properties of materials have appeared to be size- and shape-dependent. Triple Sr3Fe2WO9 perovskite has been prepared in for...

Perovskite materials exhibit interesting physical properties due to their exceptional structure. Those properties have been studied for various practical applications: from superconductors, electrode and electrolyte materials for fuel cells, catalytic converters in diesel vehicles, components for solar cells to the memory device components. While n...

Specific structure of perovskite compounds provides them with various interesting properties which vary from magnetic and electric properties to magnetic frustration and half‐metallicity. Because of their properties they can be found in numerous technological applications such as transducers, memory devices, solar cells, etc. A3B2(W/Te)O9 (A=Sr, Ba...

The CexZr1-xO2 solid solutions were prepared as a function of the composition x with constant specific surface area in order to explore the relationship between oxygen storage capacity (OSC) and activity of the oxidation reactions of CO and HCl. The as-prepared CexZr1-xO2 solid solutions were characterized by X-ray diffraction (XRD), Raman spectros...

Sr3Fe2WO9 and Ba3Fe2WO9 triple perovskites have been prepared in nanocrystalline form using a modified sol-gel route with citric acid as chelating agent. These materials have been studied by X-ray powder diffraction (PXRD), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), scanning electron microscopy (SEM), unpola...

Perovskite materials exhibit intriguing physical properties that have been extensively studied for various practical applications - from the discovery of ceramic high-temperature superconductors to the hybrid organic–inorganic semiconductors for high-efficiency solar cells - the materials science and applications of perovskites have been a very bro...

Mixed Ce1-xZrxO2 nano-rod particles with varying Zr doping levels of up to 20% were exposed to Deacon reaction mixtures with high HCl concentration at a reaction temperature of 430 °C. The mixed Ce1-xZrxO2 nano-rod samples were characterized before and after Deacon reaction by x-ray diffraction (XRD), transmission electron microscopy (TEM), and x-r...

Oxygen storage in solid catalyst is very important for industrial oxidation reactions such as HCl oxidation reaction (Deacon process). Ceria nanoparticles act as promising catalysts for HCl oxidation reaction. Ceria posseses high OSC (oxgen storage capacity) which is a measure of the oxygen quantity that material can store and release. This makes c...

In modern times of technology development there is a need for reducing size and expanding density of data storage components. Ferroelectricity and ferromagnetism are essential for achieving multifunctional properties. Complex metal oxides with double perovskite type crystal structure Sr3Fe2WO9 and Ba3Fe2WO9 have been synthesized using modified citr...

We studied the stability of CeO2 nano-cubes with preferentially (1 0 0)-oriented facets in the HCl oxidation reaction (Deacon process) for various reaction temperatures and the addition of small concentrations of water in the gas feed. For a reaction mixture HCl:O2 = 1:2 we find that CeO2 is substantially chlorinated below 380 °C, revealing a low c...

Cation distribution between tetrahedral and octahedral sites within the ZnMn2O4 spinel lattice, along with microstructural features, is affected greatly by the temperature of heat treatment. Inversion parameter can easily be tuned, from 5 to 19%, depending on the annealing temperature. The upper limit of inversion is found for T= 400 °C as confirme...

The temporary storage of oxygen in a solid catalyst is imperative for many important industrial oxidation reactions in the gas phase, for instance the post-treatment of automotive exhaust gas. A peculiar mixed Ce-Zr (1:1) oxide, the ordered κ-Ce2Zr2O8 phase, is a promising catalytic material exhibiting an extraordinarily high oxygen storage capacit...

Highly crystalline SrFe2/3Te1/3O3, Ba3Fe2TeO9 and Ba2NiTeO6 and their tungsten counterparts have been synthesized by using a modified sol- gel route methodology, reducing the time needed using solid-state routes and resulting in high reaction yield up to 75 %. These materials have been studied by X-ray powder diffraction (XRPD), scanning and transm...

CeO2 is a promising catalyst for the HCl oxidation (Deacon process) in order to recover Cl2. Employing shape-controlled CeO2 nanoparticles (cubes, octahedrons, rods) exposing facets with preferential orientations ((100), (111), (110)), we studied the activity and stability under two reaction conditions (harsh: Ar:HCl:O2= 6:2:2 and mild: Ar:HCl:O2=7...

Ferromagnetism and ferroelectricity are essential in numerous aspects of modern technology wherefore a need for synthesizing materials which have these properties appears. The main goal of this research is synthesis of complex perovskite nanoparticles with A2B2WO9 (A=earthalkali metal, B=transition metal) structure type by using specially modified...

Herein, a cost-effective and tailored synthesis route for the preparation of cubic ZrO2 nanocrystals with high dispersibility (up to 45% by weight in H2O) is reported. The procedure is straightforward and produces uniform 2–3 nm particles of a high yield of up to 98% when applying microwave dielectric heating as a “green” method. Furthermore, it ca...

Pravilno strukturirani mezoporozni silicijev dioksid dopiran samarijevim oksidom (Sm-MCM-41) se prema istraživanjima pokazao kao obećavajući kandidat za uklanjanje fosfata iz otpadnih voda. Može se sintetizirati laganim sol - gel postupkom u jednom koraku koristeći CTAB (cetiltrimetilamonijev bromid) kao predložak, TEOS (tetraortosilikat) kao izvor...

An easy, inexpensive combustion route was designed to synthesize hierarchically porous WO3. The tungsten source was fresh peroxiotungstic acid by dissolving tungsten powder into hydrogen peroxide. To promote the combustion reaction, a combined fuel of both glycine and hydrazine hydrate was used. The microstructure was well-connected pores comprised...

Highly crystalline SrFe2/3Te1/3O3, Ba3Fe2TeO9, and Ba2NiTeO6 have been synthesized by using a specially developed sol-gel route methodology, reducing the time needed employing solid-state routes and resulting in high reaction yield up to 75%. These materials have been studied by X-ray powder diffraction (XRPD), scanning and transmission electron mi...

The κ-Ce2Zr2O8 phase is synthesized starting from t-Ce0.5Zr0.5O2 solid solution which is reduced by hydrogen at high temperatures to form the pyrochlore Ce2Zr2O7 phase (pyr-Ce2Zr2O7) with high degree of ordering of the cationic sublattice. The final step in the synthesis of the κ-Ce2Zr2O8 phase includes a mild re-oxidation of pyr-Ce2Zr2O7 at around...

Zinc oxide (ZnO) microrods were fabricated on graphene/SiO2/Si substrate by a simple hydrothermal route. The obtained products were characterized using X-ray powder diffraction, scanning electron microscopy, energy dispersive X-ray spectrometry, photoluminescence and UV-visible spectrometry. Microrods exhibits hexagonal wurzite structure. Some ZnO...

A series of ordered mesoporous silica loaded with samarium oxide (Sm-MCM-41) were synthesized by a facile one-step sol-gel route using hexadecyltrimethylammonium bromide (CTAB) as the template, tetraethylorthosilicate (TEOS) as the silica source, and hexahydrated samarium chloride as the precursor. The as-synthesized materials with the Sm/Si molar...

Uniform, hollow NiO microspheres constituted from nanosheets were synthesized by a simple water bath method through a SiO2 spheres template-assisted approach and applied in an efficient gas sensor towards volatile organic compound (VOC) vapors. The structural characterizations reveal that sub-micrometer NiO hollow microspheres (350-400 nm) were for...

Pt activated SnO2 nanoparticle clusters were synthesized by a simple solvothermal method. The structure, morphology, chemical state and specific surface area were analyzed by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectrum (XPS) and N2-sorption isotherm, respectively. The SnO2 nanoparticle cluste...

Two-dimensional (2D) atomic crystals are attractive for use in next-generation nanoelectronics, due to their unique performances, which may lead to the resolution of the technological and fundamental challenges in semiconductor industry. Based on the introduction of 2D atomic crystal-based transistors and ambipolar behavior, the review presents a b...

CoMn2O4 nanomaterials are prepared by a low temperature precipitation route employing metal acetates and NaOH. Structural changes, induced by different annealing temperatures, are comprehensively analyzed by X-ray powder diffraction and Raman spectroscopy. With rising annealing temperature the crystal lattice of CoMn2O4 undergoes changes; AO4 tetra...

ZnO nanoparticles with high crystallinity and several nanometers in size were synthesized by a low-temperature solvothermal route from zinc acetate dihydrate (Zn(CH3COO)2·2H2O), potassium hydroxide (KOH) and methanol (CH3OH). The structural and the morphological characterizations of the ZnO nanoparticles were performed by X-ray powder diffraction (...

WO3 films were obtained via Evaporation-Induced Self-Assembly (EISA) using ionic surfactants such as the long-chain ionic liquid 1-hexadecyl-3-methyl imidazolium chloride and –bromide (C16mimCl and C16mimBr) and Cetyltrimethylammonium chloride and –bromide (CTAC and CTAB, respectively) as additive. Owing to the presence of the ionic surfactants, WO...

Single crystals of CoAs2O4 (I) are grown under hydrothermal conditions using an aqueous 1:1:1 molar mixture of KCl, Co(OH)2, and As2O3 at pH 6 (autoclave, 200 °C, 199 h; cooling to 25 °C within 98 h).

ZnO quantum dots (QDs), a few nanometers in size, were synthesized by a sol–gel method using different solvents (methanol, ethanol and hexanol). The structural, morphological and photoluminescent properties were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, X-ray pho...

The crystal structures of the hydrothermally synthesised trippkeite-related materials, CoAs2O4 and NiAs2O4 were investigated by means of single-crystal X-ray diffraction, Raman and infrared spectroscopy. As obtained compounds crystallise in the tetragonal crystal system (P42/mbc), with unit cell parameters at 293 K of a = 8.34530(10) / 8.2277(12) Å...

Here, CuO micro-sheets were successfully synthesized from Cu foil using the annealing procedure. Cupric oxalate (CuC2O4·xH2O) micro-sheets were firstly peeled off by immersing Cu foil in oxalic acid solution at room temperature, and then they were converted into CuO with preserved configuration after thermal treatment at 350 °C. Various techniques...

Porous NiO nanosheets were self-grown on an alumina tube with a pair of Au electrodes connected by platinum wires via a simple solution combustion synthesis. A cubic NiO phase was obtained by a mixed solution of an oxidizer of nickel nitrate and a fuel of ethylene glycol (EG) at 400 °C. The phases and the morphologies of the materials self-grown on...

Pt-functionalized SnO2 sheets with Pt contents of 0, 0.5, 1, and 2 wt% were synthesized by a facile solution combustion synthesis, and their crystal structure, morphology, and chemistry have been thoroughly characterized. In the combustion process, the urea (CO(NH2)2) has been employed as a fuel. The obtained products appear as porous sheets formed...

When dealing with the crystal structure solving of low-crystalline materials, it is of paramount importance to combine DFT geometry optimization with direct-space methods in order to find the correct structural model. Particularly, in the case of inorganic-organic hybrids prepared by solvothermal route, finite dimensional single crystal is very dif...

A new type of catalytic material, large-scale ZnO nanorod arrays grown on self-source substrate, was directly synthesized by a facile hydrothermal approach. The catalytic activity of the ZnO nanocrystals with different exposed surfaces, including ZnO hexagonal nanorods with exposed reactive {0001} facets, hexagonal ZnO nanopyramids with nonpolar {0...

The synthesis and the gas sensing properties of novel mixed phase (i.e., tetragonal and orthorhombic phase) coexistence SnO2 nanorods are presented. The mixed phases SnO2 nanorods were obtained by calcinations of SnC2O4 synthesized with a chemical precipitation method using SnCl2·2H2O and PEG 400 as precursors. The resulting nanorods appear as poly...

We report the evaporation-induced self-assembly synthesis of large-pore mesoporous thin films of ferrimagnetic holmium iron garnet (Ho3Fe5O12) from nitrate salt precursors and a polyisobutylene-block-poly(ethylene oxide) polymer structure-directing agent. The phase composition, atomic bonding configuration, and pore structure at the top surface and...

A new visible-light sensitive photocatalyst, Ni(OH)2 nanosheets/ZnO nanorods composites with different Ni(OH)2 contents, was synthesized via a facile water bath route. X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV–vis spectroscopy were used to examine the morphology and microstructure of the composites. XRD analysis reveale...

ZnO nanoparticles were prepared in a typical single-step experimental procedure, in different water-to-ethylene glycol volume ratios at a moderate temperature. Morphological studies performed by SEM and TEM have revealed two different types of nanosized particles: hexagonal facetted nanoparticles and spherical ones. The obtained ZnO nanoparticles w...

Herein, we report the synthesis, microstructure, and magnetic properties of cadmium ferrite (CdFe2O4) thin films with both an ordered cubic network of 18 nm diameter pores and single-phase spinel grains averaging 13 nm in diameter. These mesoporous materials were produced through facile polymer templating of hydrated nitrate salt precursors. Both t...

A new and facial (low temperature and low cost) method for a direct synthesis of the stable and crystalline phase pure Ni(OH)2 nanosheets was developed using cationic surfactant cetyltrimethylammonium bromide (CTAB). X-ray diffraction (XRD) analysis, Fourier transformed infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission...

The stable and crystalline phase of pure nanostructured CeO2 with various morphologies has been directly synthesized using a cationic surfactant (cetyltrimethylammonium bromide, CTAB) and cerium chloride (CeCl3·6H2O) at room temperature by a new, simple, and green chemical precipitation method. Thorough structural characterization techniques, inclu...

The amorphous-nanocrystalline silicon thin films doped with about 10% of hydrogen (a-nc-Si), 50–100 nm thick, were deposited by plasma enhanced chemical vapor deposition (PECVD) on glass covered with amorphous Si:H, using mixture of silane and hydrogen as working gas. The power of discharge was either constant or it was decreased during deposition,...

Nanocrystalline nickel molybdate (NiMoO(4)) thin film electrodes with a 3D honeycomb structure of uniform 17 nm diameter pores were successfully produced through facile polymer templating strategies. These novel sol-gel type materials exhibit enhanced lithium ion storage capabilities, and thus show promise for battery applications.

Two novel nanosized hybrid inorganic–organic frameworks, VO(C14H9COO)2, and VO(C10H7COO)2 have been solvothermally synthesized and their structures elucidated using a combination of powder XRD and DFT geometry optimization. They contain one-dimensional chains of corner-sharing tetrahedra in the case of VO(C10H7COO)2, and corner-sharing octahedra fo...

Combining sol-gel chemistry with polymer templating strategies enables production of CuFe(2)O(4) thin films with both an ordered cubic network of 17 nm diameter pores and tunable spinel domain sizes. These nanocrystalline materials contain only minor structural defects with λ = 0.85 ± 0.02 and exhibit multiple functionalities, including superparama...

We considered theoretically and experimentally a strategy to functionalize plasmonic metamaterials utilizing either a metal-organic framework (MOF) or inorganic-organic hybrids for application in adsorption-based gas sensing. MOFs are one-dimensional (1D), 2D or 3D crystalline compounds that simultaneously contain metal ions or ion clusters and org...

Ordered mesoporous, crystalline MgTa(2)O(6) thin films with a mesoscopic nanoarchitecture were synthesized by evaporation-induced self-assembly (EISA) in combination with a sol-gel procedure. Utilization of novel templates, namely the block copolymers KLE (poly(ethylene-co-butylene)-b-poly(ethylene oxide)) and PIB6000 (CH(3)C(CH(3))(2)(CH(2)C(CH(3)...

The title compound has been synthesized under solvothermal conditions by reacting vanadium(V) oxytriisopropoxide with terephthalic acid in N,N-dimethylformamide. A combination of synchrotron powder diffraction, infrared spectroscopy, scanning and transmission electron microscopy, and thermal and chemical analysis elucidated the chemical, structural...

Single-phase TiO2 (B) nanoparticles are synthesized from TiCl4 and water in a mixture of 1-hexadecyl-3-methylimidazolium chloride and 1-butyl-3-methylimidazolium tetrafluoroborate at 95 °C (14 h).

Various transition metal (TM) doped zinc oxide nanoparticles with the composition TMxZn1−xO (TM = V, Mn, Fe, Co, and Ni; x = 0.01−0.3) were prepared by a microwave-assisted nonaqueous sol−gel route in benzyl alcohol within a few minutes. The high doping levels in the range 20−30 atom % achieved for Co and Fe provide a promising opportunity to study...

Mono- and bilayered undoped and fluorine doped SnO2 thin films have been successfully prepared at optimized postdeposition temperatures of 590 and 610°C by the atmospheric pressure chemical vapor deposition method. The microstructural properties of as-deposited films were thoroughly examined using the Rietveld refinement of powder-like XRD patterns...

The synthesis as well as the electrochemical properties study of niobium-doped TiO2 (NTO) with mesoporosity and high surface area is presented. The mesoporous NTO was prepared using a novel poly(ethylene-co-butylene)-b-poly(ethylene oxide) amphiphilic diblock copolymer as a template and simple titanium reagents (TiCl4 and Nb(OC2H5)5) by a polymer-a...

A simple route to niobium, hafnium and tantalum oxide nanocrystals using a nonaqueous sol-gel route based on the solvothermal reaction of the corresponding metal chlorides with benzyl alcohol is presented. This approach can easily be extended to the preparation of high quality Co-doped HfO(2) nanoparticles of uniform size and shape and with a homog...

Diluted magnetic semiconductors with a Curie temperature exceeding 300 K are promising candidates for spintronic devices and spin-based electronic technologies. We review recent achievements in the field of one of them: Co-doped ZnO at the nanoparticulate scale.