Higher Absorption Intensity Research Articles

Flame-retardant and phase-changing microcapsules incorporating black phosphorus for efficient solar energy storage

A novel phase change microcapsule has been developed and synthesized for solar energy storage systems. The fabrication process involved the in-situ polymerization of phase change microcapsules, wherein cellulose nanocrystals (CNCs) were employed as Pickering emulsifiers and nano-fillers to enhance the properties of the melamine formaldehyde resin (MF) shells. These enhancements included improved emulsifying ability, mechanical strength, and sustainability. Subsequently, black phosphorus (BP), a two-dimensional material with high solar absorption intensity and a wide frequency range, was covalently modified by MF to enhance the photothermal capacity of the microcapsules and reduce the thermal resistance between the photothermal material and the phase change material (PCM), this functionalized BP was referred to as MF@BP. The phase change microcapsules without and with MF@BP exhibit high latent heat values of 210.79 J g−1 and 207.92 J g−1, respectively. Furthermore, the PCM core content was measured at 88.9% and 88.5%, and the encapsulation rates are 99.0% and 98.8%, respectively. The PCM microcapsules with MF@BP demonstrated excellent photothermal characteristics with an efficiency of 92.04%. Additionally, the PCM microcapsules exhibit stability below 200 °C and retain 99.4% of their latent heat even after 100 cycles of heating and cooling. Furthermore, the PCM microcapsules display self-extinguishing properties due to the flame retardancy of the MF shell, and the incorporation of black phosphorus further enhanced the flame retardancy. Overall, these PCM microcapsules exhibit significant potential for utilization in solar energy systems.

One-step preparation of sea urchin-like conducting polypyrrole-modified porous carbonyl iron powders with excellent microwave absorption properties

Carbonyl iron powder (CIP) is a common microwave absorber frequently utilized to prepare microwave-absorbing materials. However, it exhibits only magnetic loss and no dielectric loss, which inevitably affects its wave-absorbing performance. Here, porous carbonyl iron powder (p-CIP) modified with conductive polypyrrole (PPy) was successfully prepared by one-step chemical etching and in-situ polymerization and then utilized to fabricate epoxy composites with high microwave absorption intensity. The scanning electron microscopy images revealed that conductive PPy was encapsulated on the surface of p-CIP. The reflection loss of the P-200 sample is −41.2 dB at 2.2 mm thickness. Reduction of the sample thickness to 1.8 mm resulted in a still acceptable reflection loss of −35.5 dB. Moreover, the effective absorption bandwidth widened to approximately 6.75 GHz (10.55–17.3 GHz). This provides a valuable approach for the development of microwave-absorbing materials with high absorption capacity.

All-dielectric absorber based on nano-graphite sheets/ionogels with configurable absorbing band.

With the increasing complexity of the electromagnetic environment, there is a growing demand for the manipulation of electromagnetic waves, leading to the rapid development in configurable microwave absorbers. All-dielectric absorbers offer broadband and high-intensity absorption effects in microwave absorption and shielding. However, they face a significant challenge: their performance is not adjustable once the design is completed. In this study, we propose a solution to this problem by creating all-dielectric absorbers with flexibly configurable absorbing properties. We achieve this by designing a composite material of ionogels/nano-graphite sheets into compressible deformable absorbing units that can be molded into different shapes using 3D printing modes. The plasticity allows us to change the performance of the all-dielectric absorber, including the microwave absorption intensity, absorption peak, frequency bandwidths, and wide-angle absorption performance. With this approach, we can flexibly manipulate electromagnetic waves using all-dielectric absorbers through different plasticity models.

MnFe2O4/polyaniline/diatomite composite with multiple loss mechanisms towards broadband absorption.

The research and development of absorbing materials with high absorbing capacity, wide effective absorption bandwidth, and lightweight has always been interesting. In this research, a facile hydrothermal method was used to prepare MnFe2O4, and the grain size of MnFe2O4 decreased with increasing hydrothermal temperature. When the size of MnFe2O4 nanoparticles is less than 10nm, its quantum size effect and surface effect make its electromagnetic microwave absorption performance greatly optimized. When the thickness of MnFe2O4-110 °C is 2.57mm, the minimum reflection loss (RLmin) is -35.28 dB. Based on this, light porous diatomite and a three-dimensional polyaniline network are introduced. Diatomite is used as the base material to effectively reduce the agglomeration of MnFe2O4 quantum dots. The relatively high surface area introduced by a three-dimensional network of polyaniline promotes the orientation, interfacial polarization, multiple relaxation, and impedance matching, thereby generating further dielectric loss. Additionally, the magnetic properties of manganese ferrite and the strong electrical conductivity of polyaniline play an appropriate complementary role in electromagnetic wave absorption. The RLmin of MnFe2O4/PANI/diatomite is -56.70 dB at 11.12GHz with an absorber layer thickness of 2.57mm. The effective frequency bandwidth (RL < -10 dB) ranges from 9.21 to 18.00GHz. The absorption mechanism indicates that the high absorption intensity is the result of the synergistic effect of impedance matching, conduction losses, polarization losses, and magnetic losses.

Synthesis of novel cationic photosensitizers derived from chlorin for application in photodynamic therapy of cancer.

Background Chlorins (dihydroporphyrins) are tetrapyrrole-based compounds that are more effective in photodynamic therapy than porphyrins. The instability of the compounds and their oxidation to porphyrin limits the use of these compounds. However, the design and synthesis of new stable chlorin-based cationic photosensitizers with the potential for use in cancer photodynamic therapy can be interesting. Methods In this research, new tetracationic meso substituted chlorins were designed, synthesized, and characterized. After determining the chemical structure and spectroscopic properties of five new photosensitizers, their phototoxicity on breast cancer cell lines (MCF-7) was investigated under optimized conditions in terms of factors such as photosensitizer concentrations and light intensity. Results The results of cytotoxicity assayed by the MTT method showed that the synthesized compounds, even up to the concentration of 50 μM had very low toxicity in the absence of light, which indicates their safety under dark conditions. Compounds A1 and A3 with the best physicochemical properties such as solubility, high absorption intensity in the effective range of photodynamic therapy, and the high quantum yield of singlet oxygen, had a good toxic effect (IC50=0.5 μM) on the cancer cells (MCF-7) in the presence of laser light. Conclusion According to the obtained results, compounds A1 and A3 have the potential to continue research on PDT for confirmation and use in treatment.

MOFs-derived Co/C nanoparticle embedded in N, S co-doped graphene for superior electromagnetic wave absorption capacity

Due to their physicochemical properties, the three-dimensional Metal-organic frameworks (MOFs) derived composites show great potential as electromagnetic wave (EMW) absorbers. However, poor impedance matching limits their actual EMW absorption performance. Composite materials that combine magnetic and dielectric losses offer a potential solution to enhance impedance match and significantly improve microwave absorption. In this work, a novel N,S-GS/Co/C composite was fabricated via a solvothermal method and a subsequent pyrolysis process to introducing nitrogen and sulfur co-doped graphene (N,S-GS) into Co-MOF. By co-doping nitrogen and sulfur, abundant defects and disordered sites were introduced on graphene, which stimulate interfacial polarization and dipole polarization. The minimum reflection loss (RL) of the sample obtained by pyrolysis at 600 °C is −68.8 dB at 9.7 GHz. Simultaneously, the thickness is 2.51 mm, and the effective absorption bandwidth (EAB) can reach 3.04 GHz. Its excellent EMW absorption performance is mainly attributed to interfacial polarization, multiple reflections, dipole polarization, magnetic resonance and eddy current loss. Accordingly, the N,S-GS/Co/C composite is convinced to be a competent candidate among EMW absorbers with high absorption intensity.

Modulation of electronic and optical properties of BlueP/MoSSe heterostructures via biaxial strain and vertical electric field

Constructing van der Waals heterostructures (vdWHs) is an efficient approach for enhancing the desirable properties of two-dimensional (2D) materials and greatly expanding the range of applications of the original monolayer materials. The structure, stability, electronic and optical properties of BlueP/MoSSe heterostructures are explored by density functional theory (DFT) calculations. The different configurations of BlueP/MoSSe vdWHs are all indirect bandgap semiconductors and have similar energy band structures, with the bandgap of about 1.0 eV under the PBE method. The bandgap of the A3 (B3) configuration calculated with HSE06 method is 1.608 (1.377) eV. The A3 configuration exhibits type-II band alignment while the B3 configuration shows type-I band alignment, both of which have high stability. The bandgap and band edge of A3 (B3) configuration can be modulated effectively by biaxial strain and vertical electric field (Efield). The BlueP/MoSSe vdWHs have broader absorption range and higher absorption intensity than their monolayers. The optical absorption intensity of heterostructures is gradually improved with increasing compressive strain, and the optical absorption spectrum is red-shifted under tensile strain. We hope that our findings will provide meaningful theoretical guidance for the preparation and potential application of BlueP/MoSSe vdWHs.

Flame-assisted combustion preparation of highly efficient black TiO2 microspheres photocatalysts under visible light

Black TiO2 microspheres photocatalysts with high light absorption intensity and photosensitive activity were prepared by a simple two-step method of flame-assisted combustion hydrolysis of tetrabutylorthotitanate (TBOT) and NaBH4 reduction. The black TiO2 microspheres photocatalysts were characterized by XRD, TEM, XPS, EELS, and UV-Vis absorption spectroscopy. The results show that the reduced TiO2 exhibits a unique core-shell composite structure with a large number of oxygen vacancies and defects in the outer layer due to Ti3+, which effectively reduces the band gap of the photocatalyst. Compared with the commercial P25 catalyst, B-TiO2 (1:7) showed higher removal of carbamazepine (CBZ) under visible light and its photocatalytic activity was 1.7 times higher than that of P25. This high photocatalytic activity is due to the efficient separation of electron-hole pairs, creating a greater number of active species. B-TiO2 (1:7) maintained high activity after five repeated cycles and achieved 89.7 % removal of CBZ.

Facile synthesis of MAPbI3/CNTs composites with superior electromagnetic wave absorption performances

Perovskite shines as a top contender in the realm of electromagnetic waves (EMW) absorption, owing to its unique physical properties, structural characteristics, and multifunctionality. However, it is still a huge challenge to synthesize high-performance EMW absorbing perovskite materials with environmental-friendly and sustainable processes, despite the simplicity of the perovskite preparation procedures. To address this issue, a facile solvent-free method was developed in this study for CH3NH3PbI3 (MAPbI3), then introduced carbon nanotubes (CNTs) and subsequently prepared MAPbI3/CNTs (MC) composites using a simple procedure. The frequency, thickness, reflection loss (RL), and effective absorption bandwidth (EAB) of MC for EMW absorption were systematically investigated by adjusting the filling amount and component ratio of MC. It is interesting to find that the as-prepared MC composites always achieve high absorption intensities in X and Ku bands. Moreover, an appropriate amount of CNTs can further optimize the impedance matching of MC and promote the loss capability of MAPbI3.With a loading ratio of 25 wt% and a mass ratio of 2:1 between MAPbI3 and CNTs, the MC sample exhibits excellent absorption capability, achieving the lowest RL of −63.8 dB at 1.8 mm and the maximum EAB of 5.16 GHz at 1.69 mm. These findings contribute to the design and development of organic-inorganic halide perovskite absorbers with superior EMW absorption performances.

Ti3C2Tx/Co-BTC derived multidimensional hierarchical Co@NC/TiO2/C nanocomposites with efficient microwave absorption

Two-dimensional (2D) transition metal carbide MXene (Ti3C2Tx) exhibits great potential in electromagnetic wave (EMW) absorbing materials due to its abundant surface functional groups and defects, tunable conductivity and high specific surface area. The Co@NC/TiO2/C composites were successfully synthesized through a solvothermal method and carbonization process using Ti3C2Tx/Co-BTC as precursor. The incorporation of magnetic metal Co nanoparticles and Rutile-TiO2 effectively addresses the issue of single loss mechanism in Ti3C2Tx. The results show that CTC-100 exhibits excellent EMW absorption performance with a minimum reflection loss (RL) value of −51.3 dB at a thickness of only 1.48 mm, and the corresponding effective absorption bandwidth is (EAB, RL < −10 dB) 4.3 GHz. Simultaneously, by adjusting the matching thickness of the material from 1.29 mm to 5.0 mm, the EAB can achieve 15.42 GHz (from 2.85 GHz to 18 GHz). The excellent EMW absorption performance of CTC-100 composite is primarily attributed to the synergistic effect of magnetic loss and dielectric loss. This study provided an effective strategy for the design of Ti3C2Tx-based EMW absorbing materials with high absorption intensity, reduced thickness, and broad effective absorption bandwidth (EAB).

Production of Activated Carbon from Sifted Coke and Determination of Its Physicochemical Characteristics.

The possibility of obtaining effective coal sorbents from a low-liquid product of coke chemical production-coke fines-has been studied. To obtain a coal sorbent, coke fines with a size of ≤10 mm were crushed and sieved to obtain a fraction of 2-5 mm. The resulting fraction was activated in a specially designed reactor at 850 °C with steam treatment. Activation was carried out at different durations of the process: 60, 90, and 120 min. It was found that the sample obtained with a process duration of 120 min has the best indicator for the ability to remove phenol from aqueous solutions (74.94 mg/g) and methylene blue (145 mg/g). When cleaning tap water with the resulting carbon sorbent, there is a decrease in the content of calcium, sulfates, and bicarbonate and a decrease in total mineralization. Obtained activated carbon was studied by scanning electron microscopy, low-temperature nitrogen adsorption (BET), and FTIR spectroscopy. It was found that the resulting activated carbon has a porous structure consisting of meso- and macropores, and the specific surface value was ~301 m2/g. The presence of high-intensity absorption bands corresponding to acid functional groups has also been established.

Construction of a multifunctional MXene@β-cyclodextrin nanocomposite with photocatalytic properties

Designing a multimodal photocatalyst material with enhanced optical properties and surface area is among the important methods for removing dangerous organic contaminants under visible light irradiation. A simple synthetic method was used to electrostatically fabricate well-defined WO3 nanoparticles in and over Ti3C2 MXene nanosheets to form a 2D/2D hybrid with varying Ti3C2 contents (1–5 wt %). These nanoparticles were then bifunctionally linked with beta-cyclodextrin to create a WO3-Ti3C2@-CD nanocomposite. The as-synthesized WO3-Ti3C2@β-CD nanocomposite shows significantly enhanced optical properties such as low band gap and high absorption intensity. Also, shows photocatalytic properties such as decreased charge carriers (3.70 × 1019 cm−3 for 5% WO3-Ti3C2@ β-CD nanocomposite compared to 2.25 × 1020 cm−3 for pristine WO3). Photoelectrochemical properties were improved for the nanocomposite, such as photoinduced carriers’ separation, and transfer ability, and this could mean that the high conductivity of Ti3C2 and a large surface area between WO3 and Ti3C2 MXene that interacts to promote the separation of charges and boost reactive sites that are crucial for increasing the photocatalytic activity of the nanocomposite. Various characterization techniques analysis such as XRD and TEM further verified the interfacial interaction between WO3, Ti3C2, and beta-cyclodextrin and actively encouraged the spatial charge separation. Additionally, this work creates opportunities for building a versatile and reliable MXene-based photocatalyst for water purification.Graphical

Efficient and enhanced optical switches based on saturation absorption via composite of 2D materials

In this study, linear and nonlinear optical absorption has been investigated in a composite consisting of thin film wrapped nano-sphere dielectrics. This type of plasmonic coupled hybridized nano-elements can lay the groundwork for many functional devices. The graphene-based coupled plasmonic structure could benefit from superior plasmons and new coupled plasmon modes. By taking advantage of theoretical concepts based on quasi-static approximation and experimental data, it is shown that achieving high modulation depth (∼94%) is possible. Apart from the high modulation depth, saturation intensity, linear and nonlinear absorption can be controlled through adjusting optical and geometrical parameters of the composite. This model proves excellent saturable absorber characteristics particularly its outstanding nonlinear optical properties, which show outstanding potential in manufacturing high-performance and new functional optoelectronic devices.

A theoretical approach on estimating temperature-dependent optical properties of two typical molten alkali chloride salts (KCl and NaCl)

Due to high working temperature of molten salts, radiative heat transfer has great effects on the temperature field computation accuracy. Since few optical property data of alkali chlorides is available, making it difficult to take radiative heat transfer into consideration, hence hindering its further application. In this paper, a theoretical approach on estimating temperature-dependent optical property of molten salts is developed to get temperature effect involved into optical property computation. After this, temperature-dependent optical properties of KCl and NaCl are estimated as an example. Due to the similarity of K and Na, the optical properties of KCl and NaCl exhibit extremely similar patterns. In short-wavelength region, they all show very high absorption intensity. In long-wavelength region the refractive index nearly keeps unchanged along with wavelength, while the extinction coefficient subtly increases. When temperature increases, the variations of optical properties of KCl are much more obviously than that of NaCl, but the overall trends are consistent. In short-wavelength region, an increase in temperature could lead to a slight red shift of refractive index peak and a decrease of extinction coefficient peak value. In long-wavelength region, increasing temperature will make both refractive index and extinction coefficient decrease.

Visual evaluation of acetylcholinesterase inhibition by an easy-to-operate assay based on N-doped carbon nanozyme with high stability and oxidase-like activity.

Acetylcholinesterase (AChE) is the key enzyme associated with neurotransmission, and thus many drugs have been explored for their inhibitory effect on AChE, such as donepezil for Alzheimer's disease and organophosphorus pesticides (OPs). Compared with clinical trials, in vitro screening bioassays for AChE inhibitors are preferable in terms of operability and cost. Herein, we developed an easy-to-operate nanozyme-based colorimetric assay for the evaluation of AChE inhibitory strength with excellent anti-interference ability and low dependence on professional equipment. The metal-free carbon nanozyme NC900 played an important role in the signal output due to its features of efficient oxidase-like activity, excellent water dispersibility, high stability and low color interference. Employing various AChE-targeted or non-targeted pesticides as examples, the as-proposed assay exhibited excellent distinguishing ability for different chemicals. The higher absorption intensity at 652 nm represents a stronger inhibitory effect, as well as blue color. In addition, this method was used to study the influence of pH on the degradation of prodrugs, and the efficiency of mixed pesticides. This work provides a simple and reliable assay to screen AChE inhibitors, which is promising for the preliminary evaluation of a large number of potential candidates.

Computational investigation of photoswitch conjugates for molecular solar energy storage.

Solar energy conversion and storage are vital for combating climate change. Molecular solar thermal systems offer a promising solution, where energy is stored in molecular compounds. This study investigates dyad molecular photoswitches by combining bicyclooctadiene/tetracyclooctane and dihydroazulene/vinylheptafulvene systems with phenyl and cyano groups. Density functional theory calculations were employed to determine molecular properties and consider solvation effects in toluene and dichloromethane. The results show that the combined systems have a predicted storage energy of up to 206.14 kJ mol-1 and an absorption peak at 390.26 nm with appreciable intensity. These dyad photoswitches exhibit favorable properties for molecular solar thermal storage and other applications. A comparison with individual photoswitches reveals advantages and disadvantages. The most effective conjugate has a slightly lower storage density than an equal mixture of individual systems, but it demonstrates better absorption characteristics, with improved overlap with the solar spectrum and higher absorption intensity. These findings contribute to the understanding of dyad molecular photoswitches, showcasing their potential for advanced energy storage and conversion technologies.

Graphene Coated Dielectric Hierarchical Nanostructures for Highly Sensitive Broadband Infrared Sensing

Broadband infrared (IR) absorption is sought after for wide range of applications. Graphene can support IR plasmonic waves tightly bound to its surface, leading to an intensified near-field. However, the excitation of graphene plasmonic waves usually relies on resonances. Thus, it is still difficult to directly obtain both high near-field intensity and high absorption rate in ultra-broad IR band. Herein, a novel method is proposed to directly realize high near-field intensity in broadband IR band by graphene coated manganous oxide microwires featured hierarchical nanostructures (HNSs-MnO@Gr MWs) both experimentally and theoretically. Both near-field intensity and IR absorption of HNSs-MnO@Gr MWs are enhanced by at least one order of magnitude compared to microwires with smooth surfaces. The results demonstrate that the HNSs-MnO@Gr MWs support vibrational sensing of small organic molecules, covering the whole fingerprint region and function group region. Compared with the graphene-flake-based enhancers, the signal enhancement factors reach a record high of 103 . Furthermore, just a single HNSs-MnO@Gr MW can be constructed to realize sensitively photoresponse with high responsivity (over 3000VW-1 ) from near-IR to mid-IR. The graphene coated dielectric hierarchical micro/nanoplatform with enhanced near-field intensity is scalable and can harness for potential applications including spectroscopy, optoelectronics, and sensing.

Carbon-encapsulated Co7Fe3 nanocomposites with high intensity and ultra-wideband microwave absorption

Composites composed of ferromagnetic alloy/dielectric material have been widely studied and applied. The alloying of the two metals endows these composites with escalated magnetic loss capacity, but they are usually micro-sized, which is not conducive to further improving the absorption performance. Herein, we develop an efficient approach to synthesize Co7Fe3@C nanocomposites with particle sizes ranging from 32 to 42 nm based on the in-situ carbon coating on the FeCo2O4 precursor and subsequent carbothermal reduction procedure. The thickness of carbon coating can be effectively tailored by controlling the reaction conditions. The minimum reflection loss (RL) value of the Co7Fe3@C nanocomposite with a carbon coating of 2.5 nm goes up to −100.8 dB at only 1.7 mm thickness, and the effective absorption bandwidth (EAB) also reaches 9.9 GHz (8.1–18 GHz) at 2.0 mm. Moreover, as the carbon coating increases to 4.2 nm, the bandwidth escalates to 11.5 GHz (6.5–18 GHz) at 2.0 mm, which covers the whole X and Ku bands and half of the C band. The remarkable performance originates from the strong magnetic loss capability of the nano-sized Co7Fe3 core as well as the good impedance matching brought by appropriate carbon coating. Accordingly, the Co7Fe3@C nanocomposite is convinced to be a competent candidate among absorbers with high absorption intensity and ultra-wide broadband.

The impact of yttrium aluminum garnet stoichiometry deviation on the conversion efficiency of tetravalent chromium ions

In this work, the conversion efficiency of Cr4+ ions and the optical properties of ceramics based on chromium-doped yttrium aluminum garnet were investigated. Increasing the conversion efficiency of Cr3+ to Cr4+ opens up broad prospects for using YAG ceramics as saturable absorbers for passive Q-switching of Nd- and Yb-solid-state lasers. The aim of this work was to study the effect of magnesium oxide concentration on the conversion efficiency of Cr3+ to Cr4+ under conditions of Al3+ (4.8 mol.%) and Y3+ (2.9 mol.%) cations excess in the garnet structure as well as the stoichiometric ratio Y3+/Al3+ = 3/5. The possibility of changing the concentration of Cr4+ ions in both the octahedral and tetrahedral positions due to the formation of magnesium substitution defects when the composition deviates from the yttrium-aluminum garnet stoichiometry has been studied. Chromium-doped transparent optical ceramics based on yttrium-aluminum garnet with different ratios of Y3+/Al3+ cations was obtained by the two-stage coprecipitation method. Magnesium oxide was used as a sintering additive and charge compensator for converting chromium ions from the trivalent to the tetravalent state in concentrations of 0 to 0.2 wt.%. It was found that aluminum excess in the yttrium-aluminum garnet matrix leads to a decrease in the Cr3+ to Cr4+ conversion efficiency. A deviation of stoichiometry towards an excess of yttrium leads to a decrease of air annealing temperature for oxidizing chromium ions to the tetravalent state and their transition to the tetrahedral position. However, the samples optical transmittance with an excess of yttrium was lower than in the cases of an excess of aluminum and stoichiometry. It was found that with an increase in the vacuum sintering temperature from 1780 to 1820 °C in the samples with an excess of aluminum, an increase in the concentration of Cr4+ ions in the tetrahedral position occurs, as evidenced by higher absorption intensity at a wavelength of 1030 nm. For the cases of stoichiometry and an excess of yttrium in garnet, this effect is less pronounced. Samples of optical ceramics of yttrium-aluminum garnet with a light transmission of more than 75 % in the visible and near-IR ranges with pronounced absorption bands of chromium have been obtained. The results of the work can be applied to the creation of passive switches for solid-state lasers.

Solution blowing spinning of polylactate/polyvinyl alcohol/ZnO nanocomposite toward green and sustainable preparation of wound dressing nanofibrous films.

The outstanding biodegradability, biocompatibility, affordability, and renewability of polylactic acid have made it a prominent biomaterial. Herein, an innovative, easy, and eco-friendly technique is used to prepare sodium polylactate (SP)-based nanofibers. Solution blowing spinning (SBS) was used to create fibrous mats of SP and polyvinyl alcohol (PVA). SBS's SP nanfibers were crosslinked using an aqueous solution of calcium chloride to produce moisture-resistant calcium polylactate nanofibrous spun mats. Both of UV-visible absorption spectra and transmission electron microscopy were utilized to study the produced zinc oxide (ZnO) nanoparticles (NPs) to indicate a diameter of around 15-23 nm with a high intensity absorption intensity at 370 nm. New polylactate copolymer was synthesized and characterized by infrared and NMR spectroscopic techniques. In order to prepare SP/PVA/ZnO nanocomposite nanofibers, various ZnO ratios were used. The morphologies of the composite nanofibers were investigated by infrared spectroscopy (FTIR), energy-dispersive X-ray analyzer, and scanning electron microscopy. The cytotoxicity tests of the prepared mat were studied by conducting experiments with L-929 cells at various time intervals. The prepared composite SP/PVA/ZnO nanofibers were subjected to cytotoxicity tests to determine their cytocompatibility. Results showed that those with ZnO concentrations between 0.5% and 2% were found to be less harmful than those with higher concentrations. A variety of bacterial species, including Bacillus pumilus and Staphylococcus aureus, as well as Klebseilla pneumoniae and Escherichia coli, were used to test the antibacterial properties of SP/PVA/ZnO spun mats. The ZnO NPs integrated in the SP/PVA fibrous mats were responsible for their antibacterial properties. After finding the appropriate concentration of ZnO that is least harmful while yet giving a satisfactory antibacterial activity, this biomaterial might be perfect for wound dressing applications. HIGHLIGHTS: New eco-friendly biodegradable sodium polylactate (SP) copolymer was synthesized. Zinc oxide nanoparticles (ZnO NPs) with a diameter of 15-23 nm were prepared. High antibacterial SP/PVA/ZnO fibers were prepared by solution blowing spinning. SP/PVA/ZnO nanofibers (180-220 nm) with various ratios of ZnO were presented. Cytotoxicity results showed that the cell viability decreases with increasing ZnO.