Metal Oxide Nanocomposites Research Articles

Novel nanofiltration membrane modified by metal oxide nanocomposite for dyes removal from wastewater

This study focuses on the development of a nanocomposite membrane using polyvinyl chloride and nanocellulose@titanium aluminate to effectively filter and adsorb dye from wastewater. Various analytical techniques were used such as FTIR, XRD, SEM, and TGA to characterize the synthesized adsorptive nanocomposite membrane. The thermal and electrical properties of the membrane were measured using a static system. The study investigated the effect of different adsorbent dosages, pH levels, and dye concentrations on the membrane’s adsorption ability. The PVC-NC@TALCM nanocomposite membrane was found to remove 98.6% of MB dye when loaded with 5% titanium aluminate at pH 10. Kinetic and isotherm studies revealed that the adsorption of MB onto the membrane followed pseudo-second-order kinetics and Freundlich isotherms, respectively. The researchers also highlighted the economic and eco-friendly nature of the PVC-NC@TALCM nanocomposite membrane as a viable option for the removal of MB from industrial wastewater.

Ternary Metal (Cu-Ni-Zn) Oxide Nanocomposite via an Environmentally Friendly Route.

In this work, we report the engineering of sub-30 nm nanocomposites of CuO/ZnO/NiO by using Dodonaea viscosa leaf extract. Zinc sulfate, nickel chloride, and copper sulfate were used as salt precursors, and isopropyl alcohol and water were used as solvents. The growth of nanocomposites was investigated by varying the concentrations of precursors and surfactants at pH 12. The as-prepared composites were characterized by XRD analysis and found to have CuO (monoclinic), ZnO (hexagonal primitive), and NiO (cubic) phases with an average size of 29 nm. FTIR analysis was performed to investigate the mode of fundamental bonding vibrations of the as-prepared nanocomposites. The vibrations of the prepared CuO/ZnO/NiO nanocomposite were detected at 760 and 628 cm-1, respectively. The optical bandgap energy of the CuO/NiO/ZnO nanocomposite was 3.08 eV. Ultraviolet-visible spectroscopy was performed to calculate the band gap by the Tauc approach. Antimicrobial and antioxidant activities of the synthesized CuO/NiO/ZnO nanocomposite were investigated. It was found that the antimicrobial activity of the synthesized nanocomposite increases with an increase in the concentration. The antioxidant activity of the synthesized nanocomposite was examined by using both ABTS and DPPH assays. The obtained results show an IC50 value of 0.110 for the synthesized nanocomposite compared to DPPH and ABTS (0.512), which is smaller than that of ascorbic acid (IC50 = 1.047). Such a low IC50 value ensures that the antioxidant potential of the nanocomposite is higher than that of ascorbic acid, which in turn shows their excellent antioxidant activity against both DPPH and ABTS.

Highly photoactive rGO-MnO2/CuO nanocomposite photocatalyst for the removal of metanil yellow dye and bacterial resistance against Pseudomonas Aeruginosa

The superior photocatalytic, biological, and electrochemical properties of metal oxide nanocomposites have made them an important part of contemporary nanotechnology research. Nanocomposite involving MnO2 and CuO has been widely utilized for catalytic and electrochemical applications. However, the different oxidation states of MnO2 and lower band gap of CuO limits the efficiency of the devices involving the composite of these two semiconductors. As a result, reduced graphene oxide (rGO) is integrated into the MnO2/CuO matrix. rGO-MnO2/CuO and MnO2/CuO nanocomposites (NCs) were synthesized using one-pot green synthesis and chemical precipitation respectively. rGO decorated MnO2/CuO NC was green synthesized from graphene oxide using Alternanthera sessilis leaf extract. XRD detected peaks related to orthorhombic structured MnO2 and monoclinic structured CuO for both the composites. Star shaped nanostructures are observed for rGO incorporated MnO2/CuO nanocomposite. MC and rMC composites have band gaps of 2.16 and 2.04 eV, respectively. FTIR spectrum showed the characteristic peaks for MnO2 and CuO in the rGO-MnO2/ CuO composite. Raman active Ag and Bg CuO modes occur at 270 and 450 cm−1 and Mn-O symmetric vibrations at 590 and 540 cm−1. The incorporation of rGO into the MnO2/CuO composite increased its photocatalytic activity from 87 % to 96 % against the degradation of metanil yellow dye by increasing its electron conductivity, adsorption capacity, and light absorption capacity. The MnO2/CuO nanocomposite with rGO demonstrated enhanced antibacterial activity, with a zone of inhibition of 24 mm compared to 13 mm for the control and 18 mm for the MnO2/CuO composite.

Hybrid of Conjugated Polymers with Incorporation of Metal Oxide Nanocomposites for Improving Optoelectronic Properties

Herein, the incorporation of TiO2 nanoparticles (NPs), SiO2 NPs, and their nanocomposite (STNC) to enhance the optoelectronic properties of the hybrid of poly[9,9′‐di‐n‐octylfluorenyl‐2,7‐diyl] (F8), poly[2‐methoxy‐5(2‐ethylhexyl)‐1,4‐phenylenevinylene)] (MEH‐PPV), and poly[2‐methoxy‐5‐(3,7‐dimethyl‐octyloxy)‐1,4‐phenylenevinylene]‐end capped with dimethylphenyl (MDMO–PPV–DMP) are revealed. The tune of the donor (F8) conjugated length can be detected from the red shift in absorption spectra when TiO2 NPs and SiO2 NPs are added, as well as an increase in emission intensity of the donor. The addition of acceptors (MEH–PPV or MDMO–PPV–DMP) to the donor results in a new absorption peak at 510 nm, which increases when TiO2 NPs and SiO2 NPs or STNC are incorporated into the ternary hybrid. The incorporation of STNC into F8 is anticipated to reduce the donor energy bandgap and improve the energy transfer from F8 to both acceptors. Moreover, Förster resonance energy transfer (FRET) is improved in the ternary hybrid, as evidenced by enhanced emission spectra of the donor and both acceptors, increased broadness of photoluminescence excitation spectra, and shifting blue color toward white region. The ternary hybrid with STNC‐based organic light‐emitting diode shows superior current and turn‐on voltage compared to other devices, which is likely due to its superior FRET.

A Comprehensive Study of Electrocatalytic Degradation of M-Tolylhydrazine with Binary Metal Oxide (Er2O3@NiO) Nanocomposite Modified Glassy Carbon Electrode

Generally, our ecosystem is continuously contaminated as a result of anthropogenic activities that form the basis of our comfort in our routine life. Thus, most scientists are engaged in the development of new technologies that can be used in environmental remediation. Herein, highly calcined binary metal oxide (Er2O3@NiO) semiconductor nanocomposite (NC) was synthesized using a classical wet chemical process with the intention to both detect and degrade the toxic chemicals in an aqueous medium using a novel electrochemical current–potential (I–V) approach for the first time. Optical, morphological, and structural properties of the newly synthesized semiconductor NC were also studied in detail using FT-IR, UV/Vis., FESEM-EDS, XPS, BET, EIS, and XRD techniques. Then, a modified glassy carbon electrode (GCE) based on the newly synthesized semiconductor nanocomposite (Er2O3@NiO-NC/Nafion/GCE) as a selective electrochemical sensor was fabricated with the help of 5% ethanolic-Nafion as the conducting polymer binder in order to both detect and electro-hydrolyze toxic chemicals in an aqueous medium. Comparative study showed that this newly developed Er2O3@NiO-NC/Nafion/GCE was found to be very selective against m-tolyl hydrazine (m-Tolyl HDZN) and to have good affinity in the presence of other interfering toxic chemicals. Analytical parameters were also studied in this approach to optimize the newly designed Er2O3@NiO-NC/Nafion/GCE as an efficient and selective m-Tolyl HDZN sensor. Its limit of detection (LOD) at an SNR of 3 was calculated as 0.066 pM over the linear dynamic range (LDR) of our target analyte concentration (0.1 pM–0.1 mM). The limit of quantification (LOQ) and sensitivity were also calculated as 0.22 pM and 14.50 µAµM−1cm−2, respectively. m-Tolyl HDZN is among the toxic chemicals in our ecosystem that have lethal effects in living beings. Therefore, this newly designed electrochemical sensor based on semiconductor nanostructure material offers, for the first time, a cost-effective technique, in addition to long-term stability, that can be used as an alternative for efficiently probing other toxic chemicals in real samples.

The effect of CuO concentration on the dc conductivity of ternary metal oxide nanocomposite

The effect of CuO concentration on the dc conductivity of ternary metal oxide nanocomposite

Observation of synergistic effects in multiphase tungsten oxide (WO3) nanocomposite and its role in enhanced supercapacitive and photoluminescence properties

Herein we report the synthesis of metal (W) and multiphase metal oxide (orthorhombic, tetragonal, and hexagonal-phase of WO3) nanocomposites through a simple hydrothermal process and the electrochemical performance of this composite displays enormous specific capacitance (CS) of 1885 F/g in 1 M H2SO4. The distinct phases of the metal tungsten and WO3 nanoplates have been identified by XRD, FTIR and Raman spectra. This study also demonstrates how the different intercalated ionic radius significantly alters the electrochemical performance with the W–O bond length and displays moderately higher CS in 1 M H2SO4 (1885 F/g) compared to 2 M KOH (821 F/g) electrolytes at 1 mV/s scan rate. The proton (H+ and K+) insertion dynamics is also explored by galvanostatic charge-discharge (GCD), scan rate-dependent electrochemical analysis and electrochemical impedance spectroscopy (EIS). The enhanced W5+ to W6+ intercalation efficiency of the individual phase of WO3 has been demonstrated by three imperfectly resolved arcs with slopes line in acidic solution of EIS spectrum, whereas a single arc with slope in the KOH solution indicates less reaction kinetics in base solution. Moreover, multiphase WO3 nanoplates show outstanding 96.6% capacitance retention in 1 M H2SO4 compared to 2 M KOH (86.2%) solution after 900 cycles at a 10 A/g current density. Based on W-WO3 nanoparticle's improved three-electrode activity, we have constructed a solid-state asymmetric supercapacitor (ASC), and it exhibits energy densities of 76.3 Wh/kg and 86.8 Wh/kg at power densities of 1125 W/kg in KOH and H2SO4 soaked devices, respectively. Linear dependence of the excitation-dependent luminance spectra (250 nm–300 nm) and clean PL spectra at the lowest excitation (1.5 W) make these multiphase WO3 nanoplates a promising candidate as UV-B detector materials. So the multifunctionality of the WO3 nanostructures makes it a potential candidate as a future-generation integrated device materials.

Fabrication of Planar Perovskite Solar Cells Using Ternary Metal Oxide Nanocomposite as Hole-Transporting Material

This work uses a hole-transporting copper cobaltite/copper oxide nanocomposite to fabricate carbon-based MAPbI3 PSCs. The copper cobaltite/copper oxide HTM-based PSC results show the highest power conversion efficiency (PCE = 7.32%) compared with an HTM-free device. The highest photocurrent density (Jsc = 15.17 mA/cm2), open-circuit voltage (Voc = 0.82 V), and fill factor (FF = 0.59) are achieved for the PSC fabricated with hydrothermally synthesized copper cobaltite/copper oxide nanocomposites. Electrochemical impedance spectroscopy is used to analyze the charge transfer resistance (Rs) and the capacitive behavior of copper cobaltite/copper oxide nanocomposite. The maximum electron lifetime of 35.16 μs is witnessed for the PSCs fabricated with 3 mg mL−1 of copper cobaltite/copper oxide (H1). The efficiency of the copper cobaltite/copper oxide-based PSC remains unchanged, showing no further perovskite layer degradation.

Cellular uptake of metal oxide-based nanocomposites and targeting of chikungunya virus replication protein nsP3

Emergence of new pathogenic viruses along with adaptive potential of RNA viruses has become a major public health concern. Therefore, it is increasingly crucial to investigate and assess the antiviral potential of nanocomposites, which is constantly advancing area of medical biology. In this study, two types of nanocomposites: Ag/NiO and Ag2O/NiO/ZnO with varying molar ratios of silver and silver oxide, respectively have been synthesised and characterised. Three metal/metal oxide (Ag/NiO) composites having different amounts of Ag nanoparticles (NPs) anchored on NiO octahedrons are AN-5 % (5 % Ag), AN-10 % (10 % Ag) and AN-15 % (15 % Ag)) and three ternary metal oxide nanocomposites (Ag2O/NiO/ZnO) i.e., A/N/Z-1, A/N/Z-2, and A/N/Z-3 with different molar ratios of silver oxide (10 %, 20 % and 30 %, respectively) were evaluated for their antiviral potential. Cellular uptake of nanocomposites was confirmed by ICP-MS. Intriguingly, molecular docking of metal oxides in the active site of nsP3 validated the binding of nanocomposites to chikungunya virus replication protein nsP3. In vitro antiviral potential of nanocomposites was tested by performing plaque reduction assay, cytopathic effect (CPE) analysis and qRT-PCR. The nanocomposites showed significant reduction in virus titre. Half-maximal inhibitory concentration (IC50) for A/N/Z-3 and AN-5 % were determined to be 2.828 and 3.277 µg/mL, respectively. CPE observation and qRT-PCR results were consistent with the data obtained from plaque reduction assay for A/N/Z-3 and AN-5 %. These results have opened new avenues for development of nanocomposites based antiviral therapies.

MOF-derived flower-like ZnCo2O4/ZnO nanoarchitecture as a high-performance battery-type redox-active electrode material for hybrid supercapacitor applications

Implementing a facile and efficient strategy to fabricate the multi-component metal oxide nanocomposites as the high-efficient electroactive electrode materials have gathered the limelight for effective energy storage applications. However, the reasonable design and development of such materials is still a significant challenge to meet the energy storage capability. Herein, we report a bottom-up strategy to fabricate a flower-like ZnCo2O4/ZnO (ZCO/ZnO) nanoarchitecture via thermal decomposition of a metal-organic framework (MOF). The unique flower-like ZCO/ZnO nanoarchitecture provides a fruitful channel for rapid electron and ion transportation and offers abundant electroactive sites for the battery-type Faradaic charge storage process. Interestingly, the multi-component ZCO/ZnO electrode reveals a specific capacitance of (Csp) of 803 F g−1 at a specific current of 1 A g−1 as compared to its counterparts (ZCO and ZnO). Even at a high specific current of 20 A g−1, a superior Csp of 538 F g−1 can be achieved, signifying the high-rate performance of the ZCO/ZnO electrode. In addition, the hybrid supercapacitor of ZCO/ZnO//AC depicts the Csp of 161 F g−1 at a specific current of 1 A g−1. It delivers a high specific energy of 50.41 Wh kg−1 at a specific power of 710.49 W kg−1, with excellent cyclic retention of around 91.04% over 10,000 cycles. Hence, this strategy could enlighten a pathway to fabricate promising electrode materials for high-performance electrochemical energy devices.

Synthesis and electrochemical performance of rGO wrapped mixed metal oxide and sulfide nanocomposite for superior energy storage applications

Reduced graphene oxide (rGO) is added to TiO2 and TiS2 to develop several hybrid electrode materials, including rGO/TiO2, rGO/TiS2, and rGO/TiO2/TiS2 to enhance the electrochemical performance. SEM/EDX, TEM, XRD, XPS, and Raman techniques are used to study the resulting hybrid electrode materials. The capacitance and cycling capacity of the synthesized rGO/TiO2, rGO/TiS2, and rGO/TiO2/TiS2 electrode materials are assessed using galvanostatic and cyclic voltammetry testing. The rGO/TiO2/TiS2 exhibits higher electrochemical performance (726 mA h/g) at 20 mV/s, among the investigated composites. The rGO/TiO2/TiS2 electrode was found to have R ct value of 20.4 Ω.cm2. These values indicate that the rGO/TiO2/TiS2 has a much lower resistance, which may be the primary cause of the outstanding electrochemical properties of the rGO/TiO2/TiS2. The retention capacity of 97.93% at 1 A/g upto10,000 cycles shows that this rGO/TiO2/TiS2 hybrid electrode also exhibits good cycling stability. The rGO/TiO2/TiS2 composites’ respective energy and power densities are determined to be 682 Wh/kg and 5073 W/kg. Due to the synergistic interaction between TiS2, rGO, and TiO2, the rGO/TiO2/TiS2 hybrid is demonstrated to be a superior anode material in supercapacitors. Therefore, the newly fabricated rGO/TiO2/TiS2 nanocomposite could be used as the potential material for energy storage applications.

A review on the electrochemical behavior of graphene–transition metal oxide nanocomposites for energy storage applications

A review on the electrochemical behavior of graphene–transition metal oxide nanocomposites for energy storage applications

Sandwich Structured Metal oxide/Reduced Graphene Oxide/Metal Oxide-Based Polymer Electrolyte Enables Continuous Inorganic-Organic Interphase for Fast Lithium-Ion Transportation.

Introducing inorganic fillers into organic poly(ethylene oxide)(PEO)-based electrolyte has attracted substantial attention to enhance its ionic conductivity and mechanical strength, but limited inorganic-organic interphasesare always caused by isolated particles agglomeration. Herein, a variety of sandwich structured metal oxide/reduced graphene oxide(rGO)/metal oxide nanocomposites to optimize lithium-ion conduction by interconnected amorphous organic-inorganic interphases in lithium metal batteries, are proposed. With the support of high surface area rGO, the agglomeration of metal oxide particles is precluded, forming continuous amorphous organic-inorganic interphases with stacked layer-by-layer structure, thus creating 3D interconnected lithium-ion transportation channels vertically and laterally. Besides, metal oxide nanoparticles with hydroxyls possess high affinity toward bis(tri-fluoromethanesulfonyl)imideanionsby hydrogen bindings between hydroxyls and fluorine and metal-oxygen bonds, releasing more free lithium ions. Consequently, PEO-ZnO/rGO/ZnO electrolyte delivers superior ionic conductivity of 1.02 × 10-4 S cm-1 at 25°C and lithium-ion transference number of 0.38 at 60°C. Furthermore, ZnO/rGO/ZnO insertion promotes the formation of LiF-rich stable solid electrolyte interface, endowing Li symmetric cells with long-term cycling stability over 900 hours. The corresponding LiFePO4 cathode possesses a high reversible specific capacity of 130 mAh g-1 at 0.5C after cycling 300 cycles with a poor capacity fading of 0.05% per cycle.

Novel super nanocomposite (CeO-SiO2 nanocomposite) with enhanced biological application: Synthesis and characterization

Cerium Oxide nanoparticles (CeO NPs), Silica nanoparticles (SiO2 NPs), and CeO-SiO2 nanocomposite (Super Nanocomposite) are some of the most promising new developments in the field of investigation. One of the most popular metal oxide nanocomposites in biological applications is CeO-SiO2 nanocomposite (Super Nanocomposite), which has excellent biocompatibility and is also inexpensive and low-toxic. CeO nanoparticles (CeO NPs), Silica nanoparticles (SiO2 NPs), and CeO-SiO2 nanocomposite (Super Nanocomposite) have all demonstrated promise in the field of biomedicine, particularly in the anti-diabetic, anti-inflammatory, and antibacterial fields. In order to combat various bacterial species, Super Nanocomposite concentrations (50 µL/mL) were developed. In this case, silica nanoparticles (SiO2 NPs), cerium oxide nanoparticles (CeO NPs), and CeO-SiO2 nanocomposite (Super Nanocomposite) have greater antibacterial activity in the zone of inhibition. SiO2 NPs, CeO NPs, and CeO-SiO2 Nanocomposite (Super Nanocomposite) various in-vitro biological activities were also assessed, including their anti-inflammatory and anti-diabetic properties. In comparison to SiO2 NPs and CeO NPs, Super Nanocomposite exhibits greater anti-inflammatory and anti-diabetic characteristics. In this study, SiO2 NPs, CeO NPs, and CeO-SiO2 nanocomposite (Super Nanocomposite) were produced using a basic precipitation method. It was established that SiO2 NPs, CeO NPs, and CeO-SiO2 Nanocomposite (Super Nanocomposite) have been characterized utilizing XRD, SEM-EDX, FTIR, UV, and TGA. This study shown that CeO-SiO2 Nanocomposite (Super Nanocomposite) outperformed SiO2 NPs and CeO NPs in terms of in vitro bioactivities. This study emphasises the importance of producing CeO-SiO2 nanocomposite (Super Nanocomposite) materials sustainably for biomedical applications.

Formation of Metal-Oxide Nanocomposites with Highly Dispersed Co Particles from a Co-Zr Powder Blend by Mechanical Alloying and Hydrogen Treatment.

The use of metal powders produced by mechanical treatment in various fields, such as catalysis or gas absorption, is often limited by the low specific surface area of the resulting particles. One of the possible solutions for increasing the particle fineness is hydrogen treatment; however, its effect on the structure of mechanically treated powders remains unexplored. In this work, for the first time, a metal-oxide nanocomposite powder was produced by mechanical alloying (MA) in a high-energy planetary ball mill from commercial powders of Zr and Co in the atomic ratio Co:Zr = 53:47 in an inert atmosphere, followed by high-pressure hydrogenation at room temperature. The initial powders and products of alloying and hydrogenation were studied by XRD, 59Co Internal Field NMR, SEM, and HRTEM microscopy with EDX mapping, as well as Raman spectroscopy. MA resulted in significant amorphization of the powders, as well as extensive oxidation of zirconium by water according to the so-called "Fukushima effect". Moreover, an increase in hcp Co sites was observed. 59Co IF NMR spectra revealed the formation of magnetically single-domain cobalt particles after hydrogenation. The crystallite sizes remained unchanged, which was not observed earlier. The pulverization of Co and an increase in hcp Co sites made this nanocomposite suitable for the synthesis of promising Fischer-Tropsch catalysts.

Graphene Nanocomposite Membranes: Fabrication and Water Treatment Applications.

Graphene, a two-dimensional hexagonal honeycomb carbon structure, is widely used in membrane technologies thanks to its unique optical, electrical, mechanical, thermal, chemical and photoelectric properties. The light weight, mechanical strength, anti-bacterial effect, and pollution-adsorption properties of graphene membranes are valuable in water treatment studies. Incorporation of nanoparticles like carbon nanotubes (CNTs) and metal oxide into the graphene filtering nanocomposite membrane structure can provide an improved photocatalysis process in a water treatment system. With the rapid development of graphene nanocomposites and graphene nanocomposite membrane-based acoustically supported filtering systems, including CNTs and visible-light active metal oxide photocatalyst, it is necessary to develop the researches of sustainable and environmentally friendly applications that can lead to new and groundbreaking water treatment systems. In this review, characteristic properties of graphene and graphene nanocomposites are examined, various methods for the synthesis and dispersion processes of graphene, CNTs, metal oxide and polymer nanocomposites and membrane fabrication and characterization techniques are discussed in details with using literature reports and our laboratory experimental results. Recent membrane developments in water treatment applications and graphene-based membranes are reviewed, and the current challenges and future prospects of membrane technology are discussed.

Magnetic anisotropy modulation of co-sputtered Fe–SrTiO3 nanocomposite thin films

Nanocomposite thin films that exhibit magnetic anisotropy, in which the direction of the easy axis is perpendicular, are highly desirable for emerging spin-based devices. In this study, the growth behavior and magnetic properties of single-layer Fe thin films sputtered at different temperatures were investigated. The surface morphologies of Fe films dramatically changed when the deposition temperature was varied, and the iron oxide phase was detected in a high-temperature-sputtered film, resulting in the degradation of magnetization and magnetic anisotropy. Then, the microstructures and magnetic properties of the co-sputtered Fe-SrTiO3 nanocomposite thin films were examined. The low-temperate-grown thin films exhibited a flat surface morphology with isotropic magnetic loops at a low power supplied to the Fe target, whereas spherical grains with a strong magnetic anisotropy with in-plane easy axis appeared in a film grown at high power. However, the nanocomposite thin films grown at a high temperature with a higher power for Fe showed perpendicular magnetic anisotropy owing to the vertically aligned Fe rod surrounded by SrTiO3. The modulation of magnetic anisotropy by tuning the geometry and composition of metal–metal-oxide nanocomposites offers a promising approach for the design of future multifunctional devices.

Synthesis and Characterization of ZnO Doped TiO2 Nanocomposites for Their Potential Photocatalytic and Antimicrobial Applications

As a result of the sol-gel method, we were able to produce pure ZnO and ZnO-doped TiO2 nanocomposites. The hexagonal wurtzite phase in ZnO products was discovered by powder X-ray diffraction (XRD). ZnO products are typically hexagonal wurtzite crystallites, formed according to the Debye Scherrer formula. Nanocomposites with significant morphological changes were created using the sol-gel process, including those that resembled rocks. To determine the composition of Zn, O, and Ti atoms in the samples, a multidimensional X-ray analysis was performed. There is an energy gap between 3.61 eV, as determined by UV-vis spectroscopy. In this study, pure ZnO and ZnO-doped TiO2 nanocomposites were used to study the degradation of methylene blue (MB) under visible light irradiation. Over an irradiation course of 6 h, a ZnO-doped TiO2 composite (84%) were studied. As determined by the kinetic analysis, nanocomposites made from pure ZnO and ZnO-doped TiO2 followed pseudo-first-order kinetics. In the presence of ZnO-doped TiO2 nanocomposites, antibacterial activity was significantly improved. This was shown to be effective against Gram-positive and Gram-negative bacteria (Escherichia coli and B. sublittus). There is evidence that the metal oxide nanocomposites that are produced can be used as an appropriate antimicrobial and disinfection alternative, particularly in biomedical settings, as reported in more detail.

Probing novel photoanodes relying on CuBiSe/metal' oxides nanocomposites-based dye-sensitizing solar cells

CuBiSe / Metal oxides (TiO2, V2O5, and ZnO) nanocomposites were synthesized by a simple and low-cost hydrothermal technique for application in Dye-Sensitised Solar Cells (DSSCs). XRD, XPS, SEM with EDX analysis, FTIR spectrum, UV visible Spectroscopy, PL spectrum, Hall Effect analysis, and Impedance analysis were performed to evaluate the prepared nanocomposites. The photovoltaic performance of DSSCs which were constructed with CBS/ TiO2, CBS/V2O5, and CBS/ZnO photoanodes were investigated. With a short-circuit, photocurrent density of 3.728 mA cm2, an open circuit voltage of 0.398 V, a fill factor of 0.72, and a Power conversion efficiency (PCE) of 1.07% was achieved for CBS/V2O5 DSSCs device, which is greater than that of DSSCs devices using CBS/ TiO2 and CBS/ZnO based photo-anodes (PCE = 0.62, and 0.37%). The obtained results propose that the prepared nanocomposite is an appropriate photo-anodic material for DSSCs applications.

Recent Progress of Advanced Metal-Oxide Nanocomposites for Effective and Low-Cost Antimicrobial Activates: A Review

Pathogens with multidrug resistance have recently been responsible for widespread disease, fatalities, and economic distress. A nanomaterial with antibacterial characteristics is used to reduce the infection’s resistance. Metal-oxide nanocomposites are nanomaterials that exhibit outstanding physical and chemical characteristics. They are prime candidates for innovative functional materials with antimicrobial activity as one of their main uses. This review will summarize the current progress on the antimicrobial activity of metal-oxide nanocomposite, including widely recognized research outputs and recent findings, as these materials can overcome the limitation of the individual material due to their utterly different properties from the single materials. Additionally, it describes several metal-oxide nanocomposites that are produced using various methods for the application of antimicrobial activity, as well as the variables that can affect such activities and the main inhabitation mechanisms of this materials.