Alumina Research Articles

Evaluating refractory material performance in pyrometallurgical recycling of lithium-ion batteries under a reducing atmosphere

Pyrometallurgical recycling of lithium-ion batteries (LIB) has emerged as the go-to approach in industrial recycling solutions, yet it encounters significant challenges, such as lithium (Li) slagging. This study explores a reactor for pyrometallurgical recycling, that offers the potential to overcome this bottleneck by simultaneously recovering lithium and phosphorous (P) via the gas stream, more noble elements including cobalt (Co), nickel (Ni) and copper (Cu) as an alloy and less noble elements like aluminum (Al), calcium (Ca) and silicium (Si) as a slag. However, to enhance the efficiency and performance of this reactor, a critical focus is placed on evaluating refractory materials with reduced corrosion and diffusion characteristics. Already explored refractory materials, including aluminum oxide (Al2O3) or magnesium oxide (MgO), have exhibited severe issues, such as accelerated corrosion and diffusion rates, leading to diminished performance and compromised efficiency. To evaluate a more suitable refractory material for pyrometallurgical recycling of LIB, tests using silicon carbide (SiC), chromium(III)-oxide (Cr2O3) and zirconium dioxide (ZrO2) were performed up to 1600 °C. The test results indicate that the investigated refractory materials offer distinct advantages and disadvantages. While SiC shows minimal to no wear by corrosion, Cr2O3 exhibits higher resistance to Li diffusion. Contrary, ZrO2 experienced severe corrosion and crack formation, showing unsuitability for LIB recycling. Based on these findings, a continuously operated reactor could use different refractory materials in specific zones. While the degasification zone could benefit from Cr2O3's minimal diffusion properties, areas with intense contact between the crucible and melt could utilize SiC's corrosion resistance. However, partial oxidation at the outer surface of the SiC crucible led to the formation of SiO2, another critical point to consider for scale-up plans, as it might influence the mechanical integrity long-term.

Thermodynamic model for a rocket engine cycle

In an era marked by the burgeoning popularity of space stations among both developing and developed nations, the demand for rockets has surged at an unprecedented pace. This meteoric rise in rocket usage has brought to the forefront a critical challenge: the efficient cooling of rocket engines. To address this issue, engineers have explored innovative solutions. One highly promising approach involves the incorporation of fuel-conducting pipes within the walls of the engine, utilizing the cooling properties of the circulating fuel to counteract the intense heat generated during combustion. Additionally, engineers have successfully employed a protective layer of aluminum oxide on the engines inner walls to enhance thermal insulation. These solutions, however, are not one-size-fits-all; they must be tailored to account for engine reusability and mass. Nevertheless, the combined use of internal fuel pipes and aluminum oxide coating has emerged as an exceptionally cost-effective and efficient method to mitigate the damage caused by heat during fuel combustion. This ground-breaking cooling strategy holds the potential to revolutionize all liquid rocket engines, offering a sustainable and reliable solution as the worlds interest in space exploration continues to soar.

Plasmonic Al, Ga and in-doped zinc oxide nanoparticles as key components for the design of electrophoretic inks with MWIR and LWIR absorbance properties

Doped zinc oxide nanocrystals (NCs) are halfway through semiconductors and metals. They exhibit unique optoelectronic properties from a high surface density of free-charge-carriers, which are responsible for localized surface plasmon resonance (LSPR). Here, a one-pot approach is presented to synthesize doped aluminum, gallium or indium zinc oxide NCs, making them all stable in non-polar media. The effect of doping on the growth mechanisms and the final crystalline structure were studied as a function of the aliovalent doping atom used. Doping atoms were integrated by substitution of Zn atom into the crystalline mesh of ZnO with a wurtzite phase identified as the primary crystalline phase for all samples by X-ray Diffraction (XRD). Typical aluminiun doped ZnO NCs (AZO) or Gallium doped NCs (GZO) nanoflowers were identified as a single crystalline structure by High-Resolution-Transmission Electron Microscopy (HR-TEM). Indium doped ZnO NCs (IZO) and pristine ZnO appeared significantly different with spherical and heart-like shapes, respectively. The doping level tendency was identified through Energy Dispersive X-ray (EDX) and increased form Al to Ga and In doping atoms. All plasmonic doped NCs have broadband infrared absorption in the Middle-wave (MWIR) and Long-wave infrared (LWIR) wavelengths, making them interesting for thermal regulation or thermal camouflage. As part of the latter application, dispersions of doped ZnO NCs were formulated as electrophoretic inks and their IR-absorbing performances determined by using a homemade setup including an infrared camera. AZO, GZO, and IZO NCs based inks achieved temperature contrasts of 15 °C and 6 °C in the MWIR and LWIR wavelengths.

Exact solutions of a hybrid nanofluid model for the flow across a heated stretching cylinder at a stagnation point

We examined the two-dimensional, Stagnation flow across a thermally extending cylinder and identify the precise analytical solutions. As hybrid nanoparticles, Copper (Cu) and Alumina Oxide solid [Formula: see text] particles are employed with base fluid [Formula: see text]. We added nanoparticles of Copper (Cu) and Alumina Oxide solid [Formula: see text] to the water being that its heat permeability is low. The fundamental fluid’s ([Formula: see text]) thermal efficiency has risen as a result. A computational model of stationary point flow through a heated stretching cylinder is constructed using the theory behind the mechanism of the flow strategy. Carefully considered is the interaction between the impinging stagnation flow and the flow produced by stretching the cylinder’s surface. For this fascinating subject, precise analytical solutions are obtained, and the results are also graphically evaluated. The flow picture is evaluated using streams for any indications of evolved flow stretching or impinging stagnation flow dominating under pressure. A thorough investigation of heat transport is also offered, along with a graphical description of the Nusselt number (Nu). When the stretching cylinder has a lower stretching velocity A, an impinging stagnation flow that is more forceful or completely developed is seen for larger values of the approaching flow pressure parameter. When greater approaching pressure P flow values are applied, stagnation flow dominates over stretching flow. A significant portion of stagnation point flow research takes a numerical approach to the subject; nevertheless, in this work, we seek to present a precise solution to the challenge at hand. Behavior of fluid as stream lines and graphs of velocity profile, temperature profiles are plotted by using Mathematica software.

Flow analysis of water conveying nanomaterials over a rotating surface with thermal radiation

PurposeThe present findings aim to investigate the thermal behavior of water-based nanofluid flow over a rotating surface, focusing on understanding the effects of different types of nanoparticles on thermal efficiency, considering thermal radiation and variable viscosity effects. By considering four distinct nanoparticles – silicon dioxide titanium dioxide, aluminum oxide and molybdenum disulfide – the study aims to provide insights into how nanoparticle addition influences heat production, thermal boundary layer thickness and overall thermal performance.Design/methodology/approachThe study employs computational methods, utilizing the BVP mid-rich algorithm for the solution procedure. The computational approach allows for a detailed investigation of the thermal behavior of nanofluid flows across a rotating surface under varying conditions.FindingsThe study concludes that adding nanoparticles in the base liquid increases heat production in the system, resulting in enhanced thermal boundary layer thickness. The comparative analysis shows that different nanoparticle types exhibit varying effects on thermal efficiency, suggesting that careful selection of nanoparticles can optimize heat transport and thermal management processes. Moreover, there's a noteworthy uptrend in the radial velocity profile concerning the stretching parameter, whereas a converse trend is observed in the thermal profile.Originality/valueThis study contributes original insights by comprehensively investigating the thermal behavior of water-based hybrid nanofluid flow over a rotating surface.

Chemical, mineralogical and geotechnical properties of volcanic ash of Tajogaite (La Palma, Canary Islands, Spain)

Volcanic eruption at La Palma island (Tajogaite, 2021) has produced tons of volcanic ash as natural sediments spread all around the island covering existing crops, roads, embankments, buildings, etc., by that way producing damage to environment. For the rehabilitation and reconstruction of island, and its application to adjacent areas, it is practical and economical to employ these volcanic ashes as construction material being encountered in abundant volume, and by that way could be considered as a resource material instead as a waste material, reducing necessary volume of landfills for its deposition. This paper defines the investigation of chemical, mineralogical and geotechnical properties of these deposited materials for its possible reuse by that way providing solution for its recovery. These young volcanic ashes are studied in its fresh natural state, prior to consolidation and cementation has taken place for its chemical, mineralogical and geotechnical characterization. Volcanic ash of Tajogaite is of a poorly graded sandy nature having difficulties for its compaction, having low improvement of relative density by the application of standard compaction methods. Mineralogy analysis indicates it is rich in silica, iron, calcium and alumina oxide, although being necessary the addition of mineral additives for its alkali-activation. Geotechnical characteristics of different samples vary depending on the sampling site, being resistance parameters determined by direct shear test (friction angle 30° to 34°) and deformational properties defined by one-dimensional consolidation test considered low values as of loose sand materials (deformation modulus range from 20 to 40 MPa).

AAO-ZnO nanocomposite coatings on aluminum alloy surface with high bonding strength and long-lasting antibacterial properties

A robust and durable antibacterial nanocomposite coating consisting of anodic aluminum oxide (AAO) and zinc oxide (ZnO) was synthesized by sol–gel deposition of ZnO onto AAO nanotubes. This unique coating features a dual-layer structure: an intermediate AAO + ZnO layer (∼3.9 μm) and a ZnO layer (∼0.8 μm). Nanosized ZnO particles, ranging from 20 to 40 nm, nucleate and grow along the walls of AAO nanotubes within this structure. AAO nanotubes, functioning as “nanocontainers”, offer appropriate sites for the deposition of ZnO particles. The mechanically interlocked AAO + ZnO interlayer enhances the adhesion between the external layer and the inner substrate. Meanwhile, this interlayer facilitates the sustained release of both Zn2+ ions and reactive oxygen species (ROS), effectively impeding bacterial proliferation. Ultraviolet antibacterial tests reveal that the AAO + ZnO interlayer maintains exceptional antibacterial efficacy, even after removing the outermost ZnO layer. The antibacterial rates of the AAO + ZnO interlayer against the above two typical bacteria (E. coli and S. aureus) after 1 h could still reach 91.4 % and 89.0 %, respectively. Specifically, AAO nanopores serve as an inert container for ZnO nanoparticles with consistently release of Zn2+ ions and reactive oxygen species (ROS), thereby ensuring the long-term antibacterial effectiveness of the AAO-ZnO coating. This research also demonstrates the significant potential of AAO-ZnO nanocomposite coating on aluminum alloys for durable antibacterial applications.

Effect of silicon carbide content on microstructure, physical and mechanical properties in vat photopolymerization of alumina

AbstractVat photopolymerization (VPP) printing of ceramic parts offers advantages such as low cost, simple operation, and short fabrication cycles. However, drawbacks include low toughness and brittleness in the printed parts. This study explores enhancing the toughness and strength of alumina (Al2O3) ceramics by incorporating silicon carbide (SiC) particles as additives. The impact of varying SiC contents on the quality of VPP‐printed Al2O3 parts is examined, encompassing microstructure, physical properties, and mechanical properties. Results indicate that optimal SiC addition reduces Al2O3 ceramics' porosity, enhances crystalline quality, and boosts mechanical properties. Excessive SiC, however, diminishes these benefits. The most significant strengthening of Al2O3 parts occurred with a 1.5 wt.% SiC content, increasing bending strength and fracture toughness by 239.7% and 564.7%, respectively. This underscore SiC's positive role in enhancing the quality of VPP‐printed Al2O3 parts.

Exploration of melting heat transfer and entropy generation in a magnetized hybrid nanoliquid over an extending sheet of varying thickness

The analysis of melting heat transfer over an expansive sheet of variable thickness is of the utmost importance in various industrial and engineering sectors, such as injection molding of polymers and composites, cooling of nuclear reactors, hot rolling, etc. Thus, the current work examines the flow dynamics, melting heat transport, and entropy generation of a magneto-hybrid nanofluid over a stretching device with variable thickness in porous media. A water-based hybridized nanofluid is formed using copper (Cu) and aluminium oxide (Al2O3) nanoparticles in the presence of thermal radiation, viscous dissipation, and Joulean heating. The transport partial derivatives were transmuted to ordinary derivatives using appropriate similarity quantities. These equations were numerically solved through shooting techniques combined with the Runge–Kutta–Fehlberg (RKF) method. Diverse figures and tables are sketched to illustrate the outcomes of the various parameters involved in the study. The investigation reveals an enlargement in the heat-bounding surface with an escalation in the magnitude of volume fraction, melting heat transfer, and magnetic field terms. In contrast, the momentum-bounding surface depletes with these parameters. Furthermore, as thermal radiation and Eckert numbers rise, the thermal gradient increases. The entropy generation increases with higher Brikman number and porosity term, but the melting heat parameter causes a decline in the entropy profiles.

Evaluation of Aluminum Oxide Nanoparticle Blended with Alcohol Based Biodiesel at Variable Compression Ratios

This paper highlights the use of aluminum oxide nanoparticles as an additive in diesel-butanol blends to show its effect on fuel consumption, emissions and performance. In the present experiment, different concentrations of aluminium oxide nanoadditives (30, 50, and 70 ppm) are used in alcohol-based biodiesel. Butanol has been used in concentrations of 5 and 10 % in diesel and therefore all blends are termed as B5 and B10 in addition to nanoparticle concentration to avoid complexity. These different blends (B5+30, B5+50, B5+70, B10+30, B10+50, B10+70) are tested for various engine loads at a constant speed of 1500 rpm. The experiment was performed on a Variable compression ratio (VCR) engine at varying compression ratios of 16, 17, and 18. Engine characteristics at different compositions of the blend at different compression ratios were provided by the interfaced computer through the software. The enhanced performance effects can be easily seen from the outcomes in the increment in brake thermal efficiency of the blends as compared to neat diesel. Considerable decrement can be observed in carbon monoxide (CO) and unburnt hydrocarbon (HC) values with an increase in compression ratio. Moderate reduction can be observed in NOx at higher loads in contrast to neat diesel.

Characterization of alane (AlH3) thin films grown by atomic layer deposition for hydrogen storage applications

Alane (AlH3) is an increasingly favored material for hydrogen and energy storage. It has demonstrated its potential in various applications, including rocket fuel, explosives, reducing agents, and serving as a viable source of hydrogen for portable fuel cells. In this study, we present the fabrication, morphology and elemental characterization of an AlH3 thin film grown through atomic layer deposition using a dimethylethylamine alane (DMEAA; AlH3N(CH3)2(CH2CH3)) precursor. The AlH3 thin film exhibited a rough surface with a white-like appearance, forming coarse grains as observed via scanning electron microscopy. X-ray diffraction confirmed the presence of AlH3 and it was compared with an aluminum thin film. Energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy confirmed the presence of pure AlH3 under a very thin aluminum oxide surface layer. Additionally, we propose a dissociation reaction mechanism based on the DMEAA precursor. Our work contributes to the advancement of hydrogen storage materials and energy-related applications that necessitate high hydrogen storage capacity and energy efficiency.

Characteristics and mechanisms of phosphorus adsorption-desorption in soil aggregates during cut slope restoration

Soil phosphorus (P) effectiveness and sustainability play a crucial role in influencing the ecological restoration process of cut slopes. However, the P adsorption-desorption characteristics of soil aggregates during the ecological restoration of cut slopes remain unclear. We selected three roadside slopes that have undergone ecological restoration for 7, 11, and 14 years, respectively, in Songpan County on the eastern Tibetan Plateau in China. We determined the characteristic parameters of P adsorption-desorption in soil aggregates using isothermal adsorption-desorption experiments. X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) were conducted to characterize the mineral and functional group properties of soil aggregates. The results showed that the P adsorption-desorption capacity of soil aggregates increased with the restoration years. Microaggregates (<0.25 mm) were higher adsorption-desorption capacity than that of macroaggregates (>0.25 mm). Soil organic matter (SOM), available phosphorus (AP), free iron oxide (FeDCB), and free aluminum oxide (AlDCB) were the driving factor of P adsorption. In addition, total phosphorus (TP), AP, pH, SOM, FeDCB, and AlDCB played key roles in P desorption. SOM, AP, and AlDCB affected indirectly FeDCB, while SOM and TP affected indirectly pH, consequently affecting adsorption-desorption. Calcite was involved in P adsorption by soil aggregates. The ligand exchange between the hydroxyl group in montmorillonite and P in the aqueous phase may the key adsorption-desorption process. The current study provides a scientific basis for promoting the effectiveness and sustainability of soil P in cut slope restoration.

Carbon whiskers reinforced porous glassy carbon composites by synchronous growth

A crystalline and non-crystalline composite of pure carbon was proposed, which is a carbon whiskers reinforced porous glassy carbon composite, where crystalline carbon whiskers support the microscopic pores of non-crystalline glassy carbon matrix. Two allotropes of carbon were produced simultaneously and compounded together in a single high temperature treatment of thermosetting phenolic resin, with aluminum oxide (Al2O3) as a catalyst. A synchronous growth theory was proposed to explain the growth mechanism. In the pyrolysis process of phenolic resin to generate porous glassy carbon, hydrocarbon gas was produced and trapped in the generated pores. By the same time, the hydrocarbon gas in pores was decomposed and grew carbon whiskers by catalysis of Al2O3. With linear thermal expansion coefficient from 2.0∙10−6 to 3.8∙10−6 K−1, thermal conductivity from 1.763 to 2.518 W∙m−1 K−1, specific heat capacity from 0.396 to 0.752 J∙g−1 K−1, thermal diffusivity from 6.115 to 4.598 mm2 s−1, between room temperature (RT) and 500 °C, the Vickers hardness is at 65 MPa, and the fracture toughness is at 0.329 Mpa∙m1/2 in RT. The carbon whiskers reinforced porous glassy carbon composite keeps a balance between thermophysical and mechanical properties, showing its application value in thermal insulation materials and high temperature structure materials.

Mesoporous silica modified alumina improves pressure stability of supported ionic liquid membranes

Supported liquid membranes (including those containing ionic liquids) offer the opportunity for high selectivity for a target gas imparted by the properties of the functional liquid or liquid mixture, along with high flux resulting from gas permeation through a liquid rather than a solid. One disadvantage of supported liquid membranes is limitations on the transmembrane pressure (TMP) they can sustain. Liquids held in the pores of the support by capillary forces are prone to “blow-out” at relatively modest TMP values. Here, we modify anodic aluminum oxide (AAO) membranes with uniformly sized ∼6–8 nm diameter cylindrical silica mesopores to improve the blow-out TMP. This modification increases the feasible TMP for various ionic liquids from ∼4 bar to more than ∼20 bar. Additionally, the liquid in the membrane at depths where the AAO membrane has not been modified (i.e., greater than a few microns) is expelled from the large pores, reducing the effective thickness of the liquid in the membrane and increasing permeance. This approach is analogous to asymmetric polymeric membranes, which are the standard of the commercial membrane industry. These findings open up the opportunity for investigation and use of supported liquid membranes at much higher TMPs than has been previously possible.

Closed Bipolar Nanoelectrode Array for Ultra-Sensitive Detection of Alkaline Phosphatase and Two-Dimensional Imaging of Epidermal Growth Factor Receptors.

The combination of closed bipolar electrodes (cBPE) with electrochemiluminescence (ECL) imaging has demonstrated remarkable capabilities in the field of bioanalysis. Here, we established a cBPE-ECL platform for ultrasensitive detection of alkaline phosphatase (ALP) and two-dimensional imaging of epidermal growth factor receptor (EGFR). This cBPE-ECL system consists of a high-density gold nanowire array in anodic aluminum oxide (AAO) membrane as the cBPE coupled with ECL of highly luminescent cadmium selenide quantum dots (CdSe QDs) luminophores to achieve cathodic electro-optical conversion. When an enzyme-catalyzed amplification effect of ALP with 4-aminophenyl phosphate monosodium salt hydrate (p-APP) as the substrate and 4-aminophenol (p-AP) as the electroactive probe is introduced, a significant improvement of sensing sensitivity with a detection limit as low as 0.5 fM for ALP on the cBPE-ECL platform can be obtained. In addition, the cBPE-ECL sensing system can also be used to detect cancer cells with an impressive detection limit of 50 cells/mL by labeling ALP onto the EGFR protein on A431 human epidermal cancer cell membranes. Thus, two-dimensional (2D) imaging of the EGFR proteins on the cell surface can be achieved, demonstrating that the established cBPE-ECL sensing system is of high resolution for spatiotemporal cell imaging.

Study on the effect of heat treatment on the structure, mechanical and electrical properties of alumina fiber insulation

In this paper, the heat treatment of alumina fiber was studied. The infiltration agent on the fiber surface was removed after heat treatment at 450 °C for 6 h. TG-DSC, scanning electron microscope, x-ray diffraction, Fourier infrared spectrometer, energy dispersive spectrometer, and patterning were used to analyze the thermal weight loss, fiber surface morphology, crystal structure, and composition of alumina fibers. The results show that the aluminum oxide fiber has excellent temperature resistance and does not undergo crystal phase transformation during thermal weight loss. After heat treatment, the fiber surface infiltration agent ablates and dissolves from the fiber surface, and the internal crystal structure of the fiber remains stable. The tensile testing machine was utilized to test the breaking strength of alumina fiber. The fiber still maintained high strength after heat treatment, and the retention rate of breaking strength was greater than 74%. ZC-90G high insulation resistance measuring instrument and WDY-Ⅱ automatic voltage tester were utilized to analyze the insulation resistivity and breakdown strength of alumina fiber before and after heat treatment. The results show that heat treatment can effectively improve the insulation performance and breakdown strength of alumina fiber.

The Modification of Aluminum Oxide Inclusions in Bearing Steel under Different Cleanliness Conditions by Rare Earth Elements

The Modification of Aluminum Oxide Inclusions in Bearing Steel under Different Cleanliness Conditions by Rare Earth Elements

Flexible and sensitive three-dimension structured indium tin oxide/zinc aluminum oxide/Cu composites thin-films pressure sensors for healthcare monitoring

Flexible pressure sensors play a crucial role in large-scale commercial applications, such as health monitoring, robotics, and smart devices. However, mass production of piezoelectric sensors for industrial applications is limited by their complex and cost-intensive fabrication processes. In this study, sensitive, simple, and wearable piezoelectric sensors were prepared by magnetron sputtering of indium tin oxide/zinc aluminum oxide (AZO)/Cu composite thin films onto three-dimension structured polydimethylsiloxane) substrate. The prepared flexible sensors delivered output voltages of −200 mV and +200 mV during 1000 loading and unloading cycles, respectively, showing an outstanding sensitivity and cycling performance. The piezoelectric performance of AZO films is primarily determined by the doping concentration of aluminum in AZO; the output voltage of the sensor with the optimal doping concentration was approximately 340 % higher than that of the undoped sample. Finite-element simulations demonstrated that the substrate with a square platform exhibited the most uniform stress distributions as well as the highest stress on its microstructure surface, which resulted in a high stress and sensitivity of the thin-film sensors. Experiments revealed that the incorporation of a microstructure enhanced the output voltages of the sensors. In particular, the output voltage delivered by the flexible sensors with square microstructures was approximately 60 % higher than that exhibited by those without microstructures.

Photoluminescence of polysiloxane-immobilized lignin-modified wood toward color-tunable and ultraviolet protective smart window

Smart windows can benefit from the use of photochromic wooden materials. In the current study, we report the preparation of fluorescent wood that can switch color under visible and ultraviolet lighting conditions. In order to develop a transparent wood that is both fluorescent and photochromic, a mixture of europium and dysprosium activated strontium aluminum oxide (EDSA) nanoparticles (NPs; 8–13 nm) and room-temperature vulcanizing (RTV) silicone rubber (Polysiloxane) was integrated into a delignified wood. EDSA is known for its excellent photostability and thermal stability. The EDSA phosphor has to be efficiently dispersed in RTV to avoid the formation of aggregates, allowing for a better fabrication of colorless wood. The coloration findings from the CIE Lab parameters displayed that when illuminated with ultraviolet rays, this colorless wooden substrate turned green. Using a transmission electron microscope (TEM), the morphological properties of the synthesized EDSA NPs were examined. Various analysis techniques, including elemental mapping, energy-dispersive X-ray (EDX), X-ray fluorescence spectroscopic analyzer (WDXRF), scanning electron microscope (SEM), hardness testing, and photoluminescence spectra, were employed to study the photochromic woods. An absorption band (365 nm) and two emission bands (436 nm and 518 nm) were determined for the prepared photoluminescent woods. When increasing the EDSA content, the results showed that the produced EDSA-infiltrated wood was more water-resistant and highly protective against UV radiation. Reversible photochromic responsiveness to UV light was observed for the prepared transparent luminous wood without fatigue.

The effect of aluminum- and silicon-containing enterosorbent on the thymic cellular composition in mice kept under two-week all-night lighting

Background. Continuous lighting contributes to the development of desynchronosis, which is stressful for the body. As a result, the normal functioning of the immune system is disrupted, which in turn can shift the physiological balance towards pathology and endotoxemia. It is relevant to develop innovative drugs based on a sorbent matrix, which can be modified with biologically active molecules that extendedly leave the sorbent surface. At the same time, the sorbent retains the properties of a detoxifier, fixing toxic agents on the surface and removing them from the body, which helps restore the internal environment and normalizes the overall reactivity of the body in extreme conditions.The aim. To study the effect of aluminum- and silicon-containing enterosorbent (based on aluminum oxide and polydimethylsiloxane) on the cellular composition of the thymus and the distribution of thymocytes in the organ according to the cell cycling state in C57Bl/6 mice kept under the all-night lighting.Materials and methods. Animals received sorbent (0.665 g per 1 kg of body weight in 200 μl of distilled water) through an intragastric tube once a day for 14 days against the background of continuous lighting. Intact mice and placebo animals composed control group. We used flow cytometry to assess the percentage of CD3hi and CD3low lymphocytes of the thymus, the CD3low/CD3hi ratio, viability and distribution of cells across according to the cell cycling state.Results. Continuous lighting inhibited the differentiation and maturation of young CD3low lymphocytes into mature forms of CD3hi, reduced the proliferation of thymic epithelial cells, and activated apoptosis of lymphocytes and epithelial cells in the organ. The introduction of the sorbent restored the content and viability of young CD3low lymphocytes and contributed to the preservation of the viability and proliferation of thymic epithelial cells.Conclusion. Using an enterosorbent based on aluminum oxide and polydimethylsiloxane under conditions of continuous lighting helps maintain the functional activity of the thymus, preventing its involution, and is advisable against the background of circadian disruption.