Olim Ruzimuradov

• Professor
• Head of Department at Turin Polytechnic University

2013AbstractIn this study, hierarchically porous bicrystalline nitrogen-doped titania (N-doped TiO2) monolithic material was fabricated by a simple two-stepapproach: (i) preparation of TiO2porous monolith by a sol–gel process of titanium alkoxide in a mild condition utilizing a chelating agent andmineral salt and (ii) annealing of TiO2porous monoli...

Perovskite hydroxystannate (MSn(OH)6) has garnered considerable interest in recent years as a novel flame retardant characterized by its low toxicity and environmentally benign properties. In order to improve the flame retardancy and smoke suppression properties of epoxy resin (EP) matrices, transition metal hydroxystannate (MSn(OH)6, M = Fe, Co, M...

This work presents the fabrication of a coaxial fiber triboelectric sensor (CFTES) designed for efficient energy harvesting and gesture detection in wearable electronics. The CFTES was fabricated using a facile one-step wet-spinning approach, with PVDF-HFP/CNTs/Carbon black as the conductive electrode and PVDF-HFP/MoS2 as the triboelectric layer. T...

Fuel cells are recognized as promising alternatives to existing conventional energy systems for a sustainable future. However, the synthesis of efficient and robust platinum (Pt) based catalysts remains a challenge for practical fuel cell applications. Herein, the Pt3Co/C nanoparticles with about 4.45 nm are firstly prepared by a “pre‐lithiation‐de...

In this research, the electronic states, band structures, and bond properties of the framework compounds of CoPO4, Co1-xFexPO4, and Co1–xNixPO4 were investigated by the density functional theory calculations. The potential capabilities of these systems in the photocatalytic water splitting to produce hydrogen were analyzed. The spin-up electron den...

Lithium manganese оxides with a spinel structure LiMgxMn(2–x)O4, doped with Mg2+ ions in the range 0 ≤ x ≤ 0.7, were obtained by sol-gel synthesis. Phase composition and morphology of obtained оxides were studied by using X-ray phase analysis and scanning electron microscopy. It is shown, that in the studied range 0 ≤ x ≤ 0.7 Mg-doped lithium manga...

The photocatalytic activity of photocatalysts can be enhanced by cation doping, and the dopant concentration plays a key role in achieving high efficiency. This study explores the impact of copper (Cu) doping at concentrations ranging from 0% to 10% on the microstructural, optical, electronic, and photocatalytic properties of zinc oxide (ZnO) nanos...

Sufficient utilization of visible‐light generated charge carriers in proton reduction reactions is of great significance for the development of effective solar‐fuel technologies. Achieving simultaneous bulk rapid transfer and surface efficient extraction of charge carriers is still very challenging. Herein, it is found for the first time ammonium p...

In this research, the electronic states, band structures, and bond properties of the framework compounds of CoPO4, Co1 – xFexPO4, and Co1 – xNixPO4 were investigated by the density functional theory calculations. The potential capabilities of these systems in the photocatalytic water splitting to produce hydrogen were analyzed. The spin-up electron...

Lithium manganese oxides with a spinel structure LiMgxMn(2 – x)O4 doped with Mg2+ ions in the range 0 ≤ x ≤ 0.7, were obtained by sol-gel synthesis. Phase composition and morphology of obtained oxides were studied by X-ray powder diffraction and scanning electron microscopy. It is shown, that in the studied range 0 ≤ x ≤ 0.7 Mg-doped lithium mangan...

Doping is one of the effective strategies to modulate the optoelectronic properties and photocatalytic activity of photocatalysts. In this study, the effect of Fe doping (0-10%) on morphology, optical and electronic properties, and photocatalytic activity of ZnO nanostructures is studied. The X-ray diffraction analysis shows that >5% Fe doping, ZnF...

Water is an indispensable resource for life on Earth, with its importance being highlighted by the vast range of applications that require it. Advanced oxidation techniques, well-known for their ability to generate hydroxyl radicals, have proven successful in treating water and wastewater. When different advanced oxidation processes are combined, a...

Vanadate electrodes are potential candidates for lithium-ion batteries (LIBs) due to their large theoretical specific capacity. However, its easy dissolution in the electrolyte, large structural changes, low conductivity and capacity...

L-ascorbic acid (AA, also known as vitamin C) and dopamine (DA) play important roles in human life activities. When their concentrations are abnormal, they will cause diseases. Therefore, it is of great interest to develop an effective strategy to detect AA and DA levels. Here, anodic aluminum oxide (AAO) films were used as templates to fabricate i...

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001

In this study, we investigated the processes of hydrogen absorption in porous ceramic materials sythesized in a solar furnace. We used burning additives inserted into ceramic materials and melted in a solar furnace in a high-density stream of concentrated solar radiation (200 W/cm²). The melt was cooled by pouring it into water at a cool...

A strong method for developing innovative materials with numerous capabilities results from the formation of hybrid nanomaterials, in which two or more dissimilar materials are combined to form a hybrid nanomaterial. Hybrid semiconductor nanomaterials are gaining popularity because of their wide range of applications in environmental cleanup, sensi...

2H MoTe 2 (molybdenum ditelluride) has generated significant interest because of its superconducting, nonvolatile memory, and semiconducting of new materials, and it has a large range of electrical properties. The combination of transition metal dichalcogenides (TMDCs) and two dimensional (2D) materials like hexagonal boron nitride (h-BN) in latera...

Nickel and chromium metal ions have been utilized to dope and co-dope titanium dioxide nanocrystals, thereby broadening the light absorption range of titania into the visible light spectrum. The doped and co-doped TiO2 nanocrystals were prepared using sol-gel techniques, with a varied doping concentration that extended from 0.25 to 10.0 wt%.These m...

The main functional part of the supercapacitors and nanogenerators made up of various types of nanostructured materials. The contemporary devices have been manufactured employing different kinds of nanomaterials based on nanoflake and nanowire structures. These hierarchical materials show high efficiency on engineering electrodes for supercapacitor...

We fabricate field-effect transistors (FETs) from low-layer molybdenum ditelluride (MoTe2) in the nanometer range and study its optoelectronic properties. In particular, we investigate the mechanisms of photocurrent generation in MoTe2 FETs using gate and bias-dependent photocurrent measurements. The results obtained show the photocurrent effects a...

Photocatalytic CO2 conversion for hydrocarbon fuel production has been known as one of the most promising strategies for achieving carbon neutrality. Yet, its conversion efficiency remains unsatisfactory mainly due to its severe charge transfer resistance and slow charge kinetics. Herein, we demonstrate tunable interfacial charge transfer on oxygen...

Metal oxide semiconductors are promising photocatalysts due to their unique optoelectronic properties which can be tuned by several ways for multifunctional applications. Doping is one of such method to modify the semiconductor photocatalysts. Doped ZnO nanostructures have been extensively used as excellent photocatalysts in the wastewater treatmen...

A series of Ag/TiO 2 nanotube array Schottky structures with oxygen defects are synthesized by a simple and environmentally friendly predischarge–electrodeposition method.

The meticulous design of semiconductor photocatalysts has been known as the key to achieve a highly efficient and selective photocatalytic reaction toward solving the current environmental pollution and energy crisis. Recently, the combination of two or more semiconductors to form step-scheme (S-scheme) heterojunction photocatalysts has emerged as...

MnO2 is a promising material for pseudocapacitor applications due to its high specific capacity and low cost, while MnO2 electrodes suffer from their low electrical and ionic conductivities. Herein, a facile and low-cost method is adopted to synthesize MnO2 - tin-doped indium oxide nanowires (ITO NWs) composite with highly ordered network structure...

A novel nanostructured Fenton-like catalyst based on La-doped MgFe2O4 for enhanced carbamazepine degradation was prepared by facile sol-gel synthesis. The physicochemical properties of the obtained catalyst were studied by DTA-TG, XRD, FTIR, SEM-EDX, TEM, and nitrogen adsorption-desorption methods. The effect of calcination temperature on the struc...

The surface of TiO2 nanoparticles was modified with silica prepared by acid hydrolysis of tetraethoxysilane followed by polycondensation. A comparative characterization of the initial and modified nanoparticles by TEM, XRD, specific surface area and ζ-potential measurements as well as the estimation of the surface acid-base properties via dynamic p...

Transition metal oxides are in high demand as electrode materials for alkali metal‐ion batteries due to high theoretical capacity. While, low electron transfer kinetics and slow ion migration lead to poor cycle stability and rate performance of the transition metal oxide electrode. In this paper, TiO2 nanotube arrays coated with Ni (Ni/TiO2NTs) is...

In the present study, the facile hydrothermal method is used to prepare sodium vanadate (Na5V12O32) nanowire arrays to act as adsorbents for removing cationic dyes. The samples are characterized and compared using scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectrum, and X-ray diffraction. The adsorpti...

Photocatalytically active TiO2 + CuO+Cu2O composite structures on copper foil and pre-oxidized copper grids were fabricated using a novel one-step sol-gel synthesis. The sol used included titanium tetraisopropoxide, ethylene glycol monomethyl ether, and nitric acid. Scanning electron microscopy of the composites synthesized upon calcination of the...

In the present study, anodic aluminum oxide (AAO) plates with a pore size of 40 nm were used as templates to fabricate indium-tin (In9Sn1) alloy nanowires (NWs) by vacuum mechanical injection method, and then Ag nanoparticles were coated onto the surface of the In9Sn1 NWs by means of the “in-situ discharge reduction” method. Finally, the composites...

Photocatalytic carbon dioxide (CO2) conversion has been recognized as one of the promising strategies for unraveling current environmental and energy problems attributed to the growing fossil fuel consumption of the human society because it can directly harness incident sunlight energy for converting waste CO2 into valuable compounds. Increasing at...

Graphical abstract Graphical abstract The traditional 6th International Conference of the CIS countries “Sol–Gel 2020” in Samarkand (Uzbekistan).Contribution of Uzbek scientists in sol–gel science.Sol–gel process with controlled phase separation. The traditional 6th International Conference of the CIS countries “Sol–Gel 2020” in Samarkand (Uzbekist...

Titanium dioxide (TiO2) has been considered as one of the most promising photocatalysts nanomaterials and is being used in a variety of fields of energy and environment under sunlight irradiation via photocatalysis. Highly efficient photocatalytic materials require the design of the proper structure with excellent morphology, interfacial structures...

Alkylphenols and alkylphenol polyethoxylates are emerging hazardous contaminants due in particular to their endocrine-disrupting properties. These compounds originate from consumer products such as paints and latex paints, adhesives, inks, formulation of pesticides, paper industry, textile and leather industry, petroleum recovery chemicals, metal w...

Sodium vanadate have been widely used as a lithium-ion battery anode. However, its further application is restricted by the capacity attenuation during cycles because of its easy solubility in electrolyte, huge structural change, and low conductivity. Here, a lithium-ion battery electrode based on Cu-Cu2O coated Na5V12O32 nanowire arrays using a pr...

BACKGROUND The relationship between the chemical composition, texture, and the shape of the granules of the protective bed upstream hydrotreating, that influences the degree of metal removal from the residual vacuum gas oil, is a critical issue in oil refining. RESULTS The character of the metal and sulphur distribution on the surface and in the v...

(1) Background: Currently, nanomaterials have been broadly used in various applications including engineering, medicine and biology. One of the carbon allotropes such as carbon nanotubes (CNTs) implemented for fabrication of nanocomposite materials due to the hypersensitivity. The combined design of nanomaterial with chitosan (CS) and CNT expands t...

Since the 2000s, among organic contaminants, alkylphenols and alkylphenol polyethoxylates have been listed as hazardous substances by several national, European and international agencies because they are considered endocrine disruptors. Among the molecules classified as priority substances in terms for monitoring and action, nonylphenols and octyl...

Thin‐films of cation‐conducting poly(styrene sulfonate) (PSS) and anion‐conducting poly(N‐vinyl‐N‐benzyl‐N,N,N‐trimethylammonium chloride) (PVBTMA) were electrochemically deposited. A low film thickness can be obtained, because the electrodepostion is a self‐limiting process. Various cases were explored: i) the deposition of a single ionomer layer...

Nanostructured catalysts based on porous aluminum oxide (PAO) and some 3d metals, such as: nickel, cobalt, and molybdenum, have been obtained by anodic oxidation and impregnation. The synthesis of porous aluminum oxide with a highly ordered pore structure with pore sizes of 50 nm and a thickness of 50 µm is carried out by the method of two-stage an...

Copper vanadate materials have a higher gravimetric capacity and energy density than those of the traditional vanadium oxide or vanadate electrodes because of the multistep oxidation-reduction reactions. This work presents the synthesis of nano-structured copper vanadates using ion-exchange reaction of sodium vanadate nanowire arrays in an aqueous...

Nanoporous anodic aluminum oxide (AAO) tubular membranes were fabricated from aluminum alloy tubes in sulfuric and oxalic acid electrolytes using a two-step anodization process. The membranes were investigated for characteristics such as pore size, interpore distance and thickness by varying applied voltage and electrolyte concentration. Morphology...

Sodium vanadate (Na5V12O32) nanowires, produced by hydrothermal synthesis are thoroughly investigated for removal of harmful lead ions (Pb²⁺) from aqueous solution. The removal reaction is visually detected by the color change of the Na5V12O32 nanowires from green to gray. After the reaction, Na5V12O32 is changed to Pb2V2O7. Theoretical DFT calcula...

The Institute of Materials Science of the Academy of Sciences of the Republic of Uzbekistan jointly with Turin Polytechnic University in Tashkent is organizing the Sixth International Conference of CIS Countries «Sol-gel synthesis and research of inorganic compounds, hybrid functional materials and disperse systems» - "SOL-GEL 2020" event. Our team...

The Institute of Materials Science of the Academy of Sciences of the Republic of Uzbekistan jointly with Turin Polytechnic University in Tashkent is organizing the Sixth International Conference of CIS Countries «Sol-gel synthesis and research of inorganic compounds, hybrid functional materials and disperse systems» - "SOL-GEL 2020" event. Our team...

A facile synthesis of polyethylene glycol-templated silica–titania (PEG-templated SiO2–TiO2) nanoparticles has been carried out using sol–gel reactions by partial-prehydrolysis of tetraethoxysilane and titanium isopropoxide. The prepared nanomaterials have been investigated by N2 adsorption, FTIR, FT-Raman, TG-DSC, XRD, TEM, DLS, ¹³C and ²⁹Si MAS N...

ZnS-containing industrial waste (ZnSW) from the mining-metallurgy industry was characterized as a useful photocatalytic material for environmental remediation. The XRD results reveal that the ZnSW contains cubic ZnS (sphalerite) as a major phase and hexagonal ZnS (wurtzite), triclinic FeS2 (pyrite) and hexagonal SiO2 (quartz) as minor phases. The a...

A nanocomposite solid ion conductor was prepared by infiltrating zirconia or titania nanotube arrays, made by electrochemical anodization of Zr or Ti metal, with proton-conducting sulfonated poly(ether-ether-ketone) (SPEEK) ionomer. The resulting material was characterized using scanning electron microscopy, X-ray diffraction, and infrared spectros...

Нами проведены исследования по созданию бионанокатализатора иммобилизацией амилазы на нанодисперсный кремнезем, а также на диацетат целлюлоза-кремнеземный нанокомпозиционный материал в виде пленок. Кроме этого, с целью создания сенсоров глюкозы разрабатываются условия иммобилизации фермента глюкозооксидазы на эти наноматериалы. Следует отметить, чт...

This study investigates the dissolution behavior as well as the surface biomineralization in simulated body fluid (SBF) of a paste composed of glycerol (gly) and a bioactive glass in the system CaO-MgO-SiO2-Na2O-P2O5-CaF2 (BG). The synthesis of the bioactive glass in an alumina crucible has been shown to significantly affect its bioactivity due to...

Herein, we demonstrate a facile way of fabricating visible-light-active lanthanum and nitrogen – co-doped SrTiO3 – TiO2 heterostructured macroporous monolithic materials with bicontinuous morphology by impregnating strontium and lanthanum ions into a preformed porous TiO2 gel in aqeuous solution containing urea followed by heat treatment in NH3 atm...

Herein, we demonstrate a facile way of fabricating visible-light-active lanthanum and nitrogen – co-doped SrTiO3 – TiO2 heterostructured macroporous monolithic materials with bicontinuous morphology by impregnating strontium and lanthanum ions into a preformed porous TiO2 gel in aqeuous solution containing urea followed by heat treatment in NH3 atm...

Please cite this article in press as: Ruzimuradov O, et al. A facile preparation of dual-phase nitrogen-doped TiO 2 –SrTiO 3 macroporous monolithic photocatalyst for organic dye photodegradation under visible light. J Eur Ceram Soc (2015), http://dx. Abstract A dual-phase nitrogen-doped TiO 2 –SrTiO 3 macroporous monolithic photocatalyst was fabric...

Microporous (TiO2)x-(SiO2)100-x (0<x<40) xerogels have been produced by sol-gel methods either by partial-prehydrolysis or reflux of tetraethoxysilane and titanium isopropoxide. These have been characterized by 29Si nuclear magnetic resonance (NMR), X-ray diffraction (XRD), EXAFS at the Ti K-edge, X-ray photoelectron spectroscopy (XPS), temperature...

Macroporous gels with bicontinuous morphology in micrometer range were prepared in a titania–silica system containing 5 and 7.6 mass % titania using tetraethoxysilane and four kinds of Ti precursors, two titanium alkoxides, titanium chloride and titanium sulfate, under coexistence of poly(ethylene glycol) (PEG) with an average molecular weight of 2...

Besom-like CdWO4 structures composed of single-crystalline nanorods were prepared by hydrothermal process with a wide range of pH, without the assistance of any template. The phase composition, crystal structure and morphology of final product were characterized by XRD, SEM and TEM. The obtained results revealed that with increasing the pH of synthe...

Surface coatings that can help deter and solve gun crime are described. These nanoengineered coatings have been applied and evaluated on brass cartridge cases, where they increase associative forensic evidence through nanotag donation to the handler and the retention of handler's DNA. In future we expect this approach to be used for other surfaces...

Microporous (TiO2)x –(SiO2)100 − x (0 < x < 40) xerogels have been produced by sol–gel methods either by partial pre-hydrolysis or reflux of tetraethoxysilane and titanium isopropoxide. These have been characterised by 29Si nuclear magnetic resonance, X-ray diffraction, EXAFS at the Ti–K edge, X-ray photoelectron spectroscopy, temperature-programme...

Silica-titania monoliths with micrometer-scale macroporous and nanometer-scale mesoporous structure and high titania contents are prepared by sol-gel process and phase separation. Titanium alkoxide precursor was not effective in the preparation of high titania content composites because of strong decrease in phase separation tendency. Bimodal porou...

In this study, we for the first time came up with a facile approach to fabricate hierarchically porous nano-crystalline monolithic magnesium titanates (MgTi2O5/MgTiO3) by impregnating magnesium chloride into hierarchically porous TiO2 monolith in a solution containing urea followed by appropriate heat-treatment. The formation of porous MgTi2O5/MgTi...

Hierarchically porous nanocrystalline CaTiO3, SrTiO3, and BaTiO3 ceramics have been produced by impregnating corresponding alkaline-earth metal ions into preformed macroporous TiO2 monoliths in a solution containing urea, followed by calcination. The macroporous TiO2 had been obtained via the sol–gel process accompanied by phase separation utilizin...

This report describes the thermal properties of nanostructured poly(acrylonitrile)–silica materials having potential as chromatography sorbents. Thermal analysis of nanostructured materials obtained by simultaneously polymerization of acrylonitrile and hydrolytical polycondensation of tetraethoxysilane are showed the presence of two exothermic peak...

This report describes the synthesis and some properties of hybrid Poly (acrylonitrile) – silica nanocomposites having potential as chromatography sorbents. The focus is on the fact that the properties of such nanostructures can depend not only on the chemical nature of their components, but also on the synergy of these components. The sol–gel appro...

The kinetics of acrylonitrile polymerization on the surface of porous microspherical silica gel (PMSS) was studied and some kinetic parameters were determined. The structure of PMSS-based sorbents was analyzed by FTIR-spectroscopy, XRD and sorption analysis before and after microcapsulation with polyacrylonitrile.

Preparation of hybrid nanocompositional chitosan/silica sorbent was carried out. It was shown that formation of gel in sol-gel process of hydrolytic polycondensation of tetraethoxysilane (TEOS) with including of chitosan consists of two stages. Suppression of crystallization of chitosan in obtained two-phase system and changes in IR spectra are evi...