Explore the vast range of titles available.

Molybdenum Trioxide (MoO3) is a promising candidate as an anode material for lithium‐ion batteries (LIB), with a theoretical capacity of 1 117 mAhg−1. Nevertheless, MoO3 has inherent lower electronic conductivity and suffers from significant volume expansion during the charge–discharge cycle, which hinders its ability to attain a substantial capacity and cyclability for practical applications. In this study, a novel material design strategy is reported for LIB anodes containing MoO3 and hard carbon (HC) architecture fabricated using a Physical Vapor Deposition (PVD) technique. MoO3/HC as anode materials are evaluated for LIBs, which demonstrate an exceptional performance with a capacity of 953 mAhg−1 at a discharging rate of 0.2 C. Additionally, MoO3/HC anode demonstrated exceptional rate capability during fast charging at 5 C and achieved a capacity of 342 mAhg−1. The MoO3/HC anode demonstrates remarkable cycle life, retaining over > 99% Coulombic efficiency after 3 000 cycles at a rate of 0.2 C. The exceptional performance of MoO3/HC anode can be attributed to the novel material design strategy based on a multi‐layered structure where HC provides a barrier against the possible volumetric expansion of LIB anode. This novel work aims to design high‐performance LIB anode material based on MoO3 and HC. The design criteria to address two key inherent challenges related to MoO3 include inferior electronic conductivity and volumetric expansion. The MoO3/HC multilayer materials designed demonstrated an outstanding electrochemical performance with a significant capacity of 953 mAhg−1 at a rate of 0.2 C exhibiting exceptional long‐term stability.

Metallic 1T-phase MoS2 is a newly emerging and attractive catalyst since it has more available active sites and high carrier mobility in comparison with its widely used counterpart of semiconducting 2H-MoS2. Herein, 1T/2H-MoS2(N) (N: MoO3 nanowires were used to prepare 1T/2H-MoS2) was synthesized by using molybdenum trioxide (MoO3) nanowires as the starting material and applied in the photodegradation of antibiotic residue in water. Enhanced photocatalytic performance was observed on the obtained 1T/2H-MoS2(N), which was 2.8 and 1.3 times higher than those on 1T/2H-MoS2(P) (P: commercial MoO3 powder was used to prepare 1T/2H-MoS2) and 2H-MoS2, respectively. The active component responsible for the photodegradation was detected and a reaction mechanism is proposed.

Formation and dispersion processes of monoclinic and hexagonal molybdenum-trioxide phases during thermally induced polycondensation of molybdic acid in aqueous medium at 100°C were investigated using dynamic light scattering. Programmed variation of the reaction medium concentration made it possible to control effectively particle nucleation and growth in the solution. Right prismatic crystallites of metastable hexagonal molybdenum trioxide with an average size from 200–500 nm to 10 μm could be obtained.

This study introduces a novel, eco-friendly approach for synthesizing molybdenum trioxide (MoO 3 ) nanoparticles using Leucas aspera leaf extract as a natural reducing and stabilizing agent, presenting a sustainable alternative to traditional methods. The synthesis results in molybdenum trioxide nanoparticles with well-defined structural and morphological properties, confirmed through advanced characterization techniques, including powder X-ray diffraction, scanning electron microscopy-energy dispersive X-ray spectroscopy, ultraviolet–visible spectroscopy, Fourier-transform infrared spectroscopy, and Raman spectroscopy. Notably, the molybdenum trioxide nanoparticles demonstrated potent antimicrobial activity against Escherichia coli and Salmonella typhi , significant antioxidant potential, and promising performance as corrosion inhibitors for mild steel in acidic environments, making them suitable for a range of biomedical and industrial applications. Additionally, these nanoparticles enhanced seed germination and growth in agricultural trials, establishing their potential as natural growth stimulants. This study highlights the unique multifunctionality of molybdenum trioxide nanoparticles across diverse fields such as medicine, agriculture, environmental remediation, and corrosion protection, offering new avenues for future research and practical applications.

The molybdenum trioxide (MoO 3 ) is the highly intriguing transition metal oxide with outstanding photocatalytic activity mainly with organic pollutants. In this study, two types of MoO 3 has been successfully synthesized by sol–gel (SG-MoO 3 ) and hydrothermal (HT-MoO 3 ) methods. The structure, morphology, and functional groups of the synthesized samples have been characterized by X-ray diffraction (XRD), scanning, and transmission electron microscope (SEM and TEM), and Fourier-transform infrared spectroscopy, respectively. The thermal stability has been explored by thermogravimetric analysis (TGA). The obtained results show that both samples were crystallized in the orthorhombic structure. FTIR peaks for both samples are inconsistent with the XRD results. SEM images show that the prepared samples possess a belt-like shape; their size is ranging from 12.7 to 44.5 nm for SG-MoO 3 , and 2.5–7.7 nm for HT-MoO 3 . To assess the photocatalytic activity, the photodegradation of methylene blue (MB) was studied. The effect of the exposure time, catalyst load, and wavelength of the excitation source was investigated. The results showed that the synthesized MoO 3 has a good photocatalytic activity to degrade the organic dye of MB in the aqueous solution. The removal rate of the MB with α-MoO 3 increases as the irradiation time increases. It is also found that the removal rate of MB increases with the increase of the catalyst load prepared by both methods. Furthermore, the photodegradation efficiency of the MB with MoO 3 induced by visible light irradiation is slightly higher than the samples irradiated by UV light at the same catalyst concentrations.

Optically anisotropic materials show important advantages in constructing polarization-dependent optical devices. Very recently, a new type of two-dimensional van der Waals (vdW) material, known as α-phase molybdenum trioxide (α-MoO3), has sparked considerable interest owing to its highly anisotropic characteristics. In this work, we theoretically present an anisotropic metamaterial absorber composed of α-MoO3 rings and dielectric layer stacking on a metallic mirror. The designed absorber can exhibit ultra-narrowband perfect absorption for polarizations along [100] and [001] crystalline directions in the visible light region. Plus, the influences of some geometric parameters on the optical absorption spectra are discussed. Meanwhile, the proposed ultra-narrowband anisotropic perfect absorber has an excellent angular tolerance for the case of oblique incidence. Interestingly, the single-band perfect absorption in our proposed metamaterials can be arbitrarily extended to multi-band perfect absorption by adjusting the thickness of dielectric layer. The physical mechanism can be explained by the interference theory in Fabry–Pérot cavity, which is consistent with the numerical simulation. Our research results have some potential applications in designs of anisotropic optical devices with tunable spectrum and selective polarization in the visible light region.

Silicon has dimensional limitations in following Moore’s law; thus, new 2D materials complementing Silicon are being researched. Molybdenum disulfide (MoS2) is a prospective material anticipated to bridge the gap to complement Silicon and enhance the performances of semiconductor devices and embedded systems in the package. For a synthesis process to be of any relevance to the industry. it needs to be at the wafer scale to match existing Silicon wafer-processing standards. Atomic Layer Deposition (ALD) is one of the most promising techniques for synthesizing wafer-scale monolayer MoS2 due to its self-limiting, conformal, and low-temperature characteristics. This paper discusses the wafer-scale ALD synthesis of Molybdenum trioxide (MoO3) using Mo (CO)6 as a precursor with Ozone as a reactant. An ALD-synthesized wafer-scale MoO3 thin film was later sulfurized through Chemical Vapor Deposition (CVD) to transform into stoichiometric MoS2, which was evaluated using X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, Scanning Electron Microscopy (SEM), and Atomic Force Microscopy (AFM). The roles of activation energy and first-order reaction kinetics in determining the ALD recipe parameters of the pulse time, reactor temperature, and purge time are explicitly discussed in detail. Discretized pulsing for developing one-cycle ALD for monolayer growth is suggested. Remedial measures to overcome shortcomings observed during this research are suggested.

The study of Transition Metal Oxides (TMOs) has expanded in recent years because of their interesting electronic, mechanical, and chemical properties and extensive applicability in electronics and optoelectronics. One such material is trioxide molybdenum (MoO 3 ), which has been used in novel applications in recent years. Beyond its applications, the theoretical understanding of MoO 3 is crucial, as it provides deeper insight into the material's behavior and could aid in predicting its performance in different applications. This review article presents the most recent known information about the optical properties, growing techniques, and applications of MoO 3 nanostructures and thin films, emphasizing how these findings and theoretical advances can guide future research. Hence, any researcher has a more accessible and efficient way to understand further and exploit this promising material and its optical properties.

An economical and easy one-step method for the biosynthesis of highly stable molybdenum trioxide (MoO3) nanoparticles was developed using gum arabic as a bio-template; ensuing nanoparticles (NP) were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, Raman spectroscopy, UV–visible spectroscopy, transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDX). The crystallinity and purity of MoO3 nanoparticles in the orthorhombic phase were confirmed by XRD analysis, and their rod-shaped identity (average sizes ranging from 7.5 to 42 nm) were observed by TEM. Cytotoxic effects of the NP were monitored using Hep G2 (human liver cancer) and HEK 293 (human embryonic kidney) cell lines via 2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide assays. The results of this study revealed that MoO3 nanoparticles are nontoxic towards Hep G2 cell lines and displayed negligible toxicity, even at very high concentrations (1000 ppm), although had moderate toxicity towards HEK 293 cells. Furthermore, their catalytic activity was evaluated for the reduction of p-nitrophenol to p-aminophenol.Graphical abstractSynopsis: Green synthesis of MoO3 nanorods using gum arabic demonstrated as an eco-friendly catalyst for the conversion of p-nitrophenol with negligible toxicity towards Hep G2 cell lines.

This study substituted sodium molybdate dehydrate (Na2MoO4.2H2O) in MS medium (Murashige and Skoog 1962) with molybdenum trioxide nanoparticles (MoO3NPs) to evaluate their impact on the morphogenesis, growth, absorption of metal-mineral elements and the activity of antioxidant enzymes of chrysanthemum. The results indicated that 100% callus formation was observed when 1-month-old leaf explants were cultured on medium supplemented with MoO3NPs and Na2MoO4.2H2O in basic MS medium, while leaf explants cultured on MS medium without Na2MoO4.2H2O did not induce callus induction. In addition, the treatment with 223.5 µL/L MoO3NPs resulted in the highest shoot regeneration (33.33%), with 1 shoot per explant, and shoot height (1.14 cm), and fresh weight (1.21 g) compared to those in others and control treatments. Meanwhile, 1-month-old stem node (1 cm) explants cultured on medium supplemented with 149 µL/L MoO3NPs recorded 100% shoot regeneration and the highest number of shoots larger than 2 cm (5 shoots/stem node), shoot height (3.23 cm) and fresh weight (1.87 g) of the shoot cluster after 30 days of culture. During the regeneration stage, the activity of antioxidant enzymes in 149 µg/L MoO3NPs treatment was better than the control (+) treatment (except for SOD) and all the other treatments. Similar results were also observed during the shoot multiplication phase, where either the lack or surplus of Mo in the culture medium also caused the decline of SOD, CAT, and APX enzymes activity. Besides, at the concentration of 6.4 µg/L MoO3NPs in the culture media, nutrients are absorbed more efficiently and rapidly by explants. These findings suggest that substituting ion salt in the culture medium with MoO3NPs led to enhanced absorption, providing a micro-mineral source for plants to support biosynthesis and essential functions. The chrysanthemum plantlets exhibited enhanced rooting and growth when treated with 149 µg/L MoO3NPs, particularly during the rooting stage after 15 days of culture.Key messageMolybdenum trioxide nanoparticles effected on the morphogenesis, growth, absorption of metal-mineral elements and the activity of antioxidant enzymes of chrysanthemum