Figure - available from: Journal of Sol-Gel Science and Technology
This content is subject to copyright. Terms and conditions apply.
Source publication
In the present work, Nickel doped Molybdenum trioxide (NixMoO3) where Ni = X (X = 5, 10, and 15%) nanoparticles (NPs) were synthesized by a wet chemical method. These nano crystals are structurely analysized by X-ray diffraction and confirm the formation of orthorhombic structure in both MoO3 and Ni-doped MoO3 samples. The impact of Ni doping on cr...
Similar publications
Modification of TiO 2 is one of the techniques used to enhance its photodegradation efficiency and to make it visible-light-active. In this study, Mo-doped TiO 2 nanoparticles were synthesized using a fast sol-gel technique, and then coated on granular activated carbon (GAC) as both substrate and adsorbent to obtain Mo:TiO 2 /GAC composite. The fab...
Citations
... 65 The rate at which radicals are produced can greatly impact the antibacterial activities by increasing the level of induced oxidative stress. 66 The cell wall of S. aureus consists of a thin layer of peptidoglycan and teichoic acid with pores on the surface of the bacterial cell. The existence of these pores enables the penetration of external substances into the cell wall, leading to the death of bacterial cells. ...
In this study, nickel selenide (NiSe), Ag/C3N4–NiSe, and C3N4/Ag–NiSe nanowires (NWs) were synthesized via coprecipitation. The prepared NWs were employed for the degradation of the rhodamine B (RhB) dye in the absence of light using sodium borohydride (NaBH4), bactericidal activity against pathogenic Staphylococcus aureus (S. aureus) and in silico docking study to investigate the d-alanine ligase (DDl) and deoxyribonucleic acid (DNA) gyrase of S. aureus. NWs demonstrate a catalytic degradation efficiency of 69.58% toward RhB in a basic medium. The percentage efficacy of the synthesized materials was evaluated as 19.12–42.62% at low and 36.61–49.72% at high concentrations against pathogenic S. aureus. Molecular docking results suggest that both C3N4/Ag-doped NiSe and Ag/C3N4-doped NiSe possess inhibitory activities toward DDl and DNA gyrase of S. aureus, which coincides with the in vitro bactericidal activity. Based on the research outcomes, the synthesized NWs show potential as an effective agent for water purification and resistance to microbial contaminants.
... Morphological analysis of the carburized MoO 3 catalyst using TEM provided insights into particle size, lattice fringes, and phases formed during the carburization reaction, distinguishing between crystalline, polycrystalline, or amorphous structures. In Fig. 4A, the uncarburized MoO 3 displayed nanorods with a length of 500-600 nm and a diameter of 100-150 nm, consistent with previous reports (Rajiv Chandar et al. 2021). Additionally, Fig. 4Ai revealed distinct lattice fringes with an average interplanar spacing of approximately ~ 237.57 ...
Hydrogen (H2) represents a promising avenue for reducing carbon emissions in energy systems. However, achieving its widespread adoption requires more effective and scalable synthesis methods. Herein, we investigated the isothermal carburization process of the MoO3 catalyst. This reaction was carried out at a constant temperature of 700 °C in a 60% CO/He stream, with hold reaction times varying (60-min, 90-min, and 120-min). This investigation was conducted using a micro-reactor Autochem with the aim of enhancing the yield of H2. The study focused on evaluating the chemical reduction and carburization behavior of the MoO3 catalyst through X-ray diffraction (XRD), transmission electron microscopy (TEM), and CHNS elemental analysis. The XRD analysis revealed the formation of carbides, Mo2C, and MoO2, serving as active sites for subsequent H2 production in the thermochemical water splitting (TWS) process. The carburization at a 60-min hold time exhibited enhanced H2 production, generating approximately ~ 6.60 µmol of H2 with a yield of up to ~ 32.90% and a conversion rate of ~ 54.83%. This finding emphasizes the essential role played by the formation of carbides, particularly Mo2C, in the carburization process, contributing significantly to the facilitation of H2 production. These carbides serve as exceptionally active catalytic sites that actively promote the generation of hydrogen. This study underscores that the optimized duration of catalyst exposure is a key factor influencing the successful carburization of MoO3 catalysts. This emphasizes how important carbide species are to increasing H2 efficiency. Additionally, it is noted that carbon formation on the MoO3 active sites can act as a potential poison to the catalysts, leading to rapid deactivation after prolonged exposure to the CO precursor.
... Figure 2 depicts TEM images of noncarburized MoO3 powder with magnification (100 nm and 10 nm). It is seen that nanorods with lengths of 500-600 nm and diameters of 100-150 nm is present in non-carburized MoO3, as shown in Fig. 2 (a) [21]. Figure 2 (b) shows well-defined lattice fringes and an average interplanar spacing of roughly 237.57 ...
... pm. The bright spots of the SAED pattern in Fig. 2 (c) correspond to orthorhombic planes |110| and |021| that agree well with XRD data, as well as a crisp and well-defined diffraction spot confirming the single-crystalline structure of MoO3 nanorods [21]. Fig. 2 (e). ...
... Coli) and (S. aureus) bacteria (Valgas et al., 2007;Rajiv Chandar et al., 2021). MoO 3 is an n-type semiconductor having large indirect E g 3.87 eV exist in three different crystallographic forms: hexagonal (h-MoO 3 ), orthorhombic (α-MoO 3 ) and monoclinic (β-MoO 3 ) (Raj et al., 2022;Sharma et al., 2022). ...
... aureus) bacteria (Valgas et al., 2007;Rajiv Chandar et al., 2021). MoO 3 is an n-type semiconductor having large indirect E g 3.87 eV exist in three different crystallographic forms: hexagonal (h-MoO 3 ), orthorhombic (α-MoO 3 ) and monoclinic (β-MoO 3 ) (Raj et al., 2022;Sharma et al., 2022). The monoclinic and hexagonal phases are metastable, while orthorhombic is a thermodynamically stable phase (Dewangan et al., 2022). ...
Contaminants removal is usually becoming an exciting subject of research from water considering their environmental and ecological effects. This work provides pathways to remove organic pollutants from water via nanomaterials and is used as an antibiotic against bacteria like Escherichia coli (E. coli). In this study, molybdenum trioxide (MoO3) and yttrium (Y) doped (2 and 4%) MoO3 nanorods were synthesized by co-precipitation method. Advanced characterization techniques have been introduced to study textural structures, morphological developments, and optical characteristics of produced products. X-ray diffraction studied multiple crystalline structures of prepared samples as hexagonal, orthorhombic, and monoclinic of pure MoO3 with decrease in crystallinity and crystallite size upon Y doping. UV-visible spectroscopy unveiled a redshift (bathochromic effect) in absorption pattern attributed to band gap energy (Eg) decreases. Photoluminescence spectra examined the recombination rate of electrons (e-) and holes (h+) as charge carriers. A sufficient catalytic activity (CA) was observed against methylene blue (MB) dye in an acidic medium (99.74%) and efficient bactericidal action was studied against (E. coli) with zone of inhibition (5.20 mm) for 4% Y-doped MoO3. In addition, in silico docking demonstrated potential inhibitory effect of produced nanomaterials on FabH and FabI enzymes of fatty acid biosynthesis.
... The antibacterial activity principle of MoO 3 is done by dissolving the material process. Also, the incorporation of MoO 3 into the polymer enables a controlled solubility and long-term use of coatings [4,14,15]. ...
It is natural and necessary to study the antibacterial properties of different substances in conditions where microbes are evolving. In this study, the nanoparticles of Molybdenum Trioxide (MoO 3) with the Hydrothermal method were synthesized. The nanoparticles' structure and crystal phase were investigated by X-ray diffraction (XRD), and the size distribution of prepared MoO 3 nanoparticles colloids were studied using the dynamic light scattering (DLS). Also, the polyvinyl chloride (PVC) composites containing 50 wt % of MoO 3 and blank composite were prepared. Furthermore, the Fourier transform infrared spectroscopy (FTIR) and the antibacterial activity of composites were investigated. The results show the nanoparticle synthesizes were carefully, and the composites containing MoO 3 can have antibacterial properties.
... In the case of metal oxide semiconductor nanomaterials, suitable doping element also plays a vital role in antimicrobial applications [95,96]. Chandar et al. reported that the incorporation of the Ni element in the MoO 3 matrix enhanced the antibacterial activity of MoO 3 nanomaterials compared to the undoped sample [97]. Ag also increased the effectiveness of MoO 3 against bacterial strains, explored by Raj et al. [95]. ...
... Generally, many transition metal oxides are sportive against micro-organisms due to the interaction of hydrophobic and electrostatic forces [100]. The production of enhanced levels of these ROS can be explained as follows [96,97,99]: when 2D layered nanoplates of pristine and Sm- ...
In this study, we have synthesized pristine and [0.5,1.5, and 2.5] M% samarium (Sm)-incorporating α-MoO3 2D-layered nanoplates utilizing a facile hydrothermal process, and investigated the physical properties along with antibacterial effectiveness. X-ray diffraction (XRD) patterns confirmed the single-phase, stable orthorhombic polycrystalline structure of the as-prepared samples. The crystallite size, lattice strain, and dislocation density were measured using both Debye–Scherrer (D–S) and Williamson-Hall (W-H) techniques. Both pristine and Sm-incorporating α-MoO3 samples showed two-dimensional (2D) layered nanoplate-type surface morphology, revealed by field emission scanning electron microscopy (FE-SEM) images. Energy dispersive X-ray spectroscopy (EDS) confirmed the presence of Sm contents in the α-MoO3 matrix. After Sm incorporation in α-MoO3, the different functional groups as well as vibrational groups were observed by Fourier-transform infrared (FTIR) spectroscopy and Raman spectroscopy analyses, respectively. The optical band gaps were measured from UV-vis diffuse reflectance spectroscopy (DRS) by employing the Kubelka–Munk formula and interestingly it is found that the bandgap energy (Eg) gradually decreased from 2.96 to 2.83 eV with the increment of Sm content. When compared to pristine α-MoO3, the Sm-incorporating samples experienced a steady improvement in room temperature ferromagnetic (RTFM) behavior as Sm content increased, as measured by hysteresis loops. The antibacterial activities of both samples were assessed against Gram-positive: Staphylococcus aureus (S. aureus), and Gram-negative: Escherichia coli (E. coli) and Salmonella enteritidis (S. enteritidis) bacteria by the agar well diffusion method and enhanced antibacterial activity was observed as the Sm concentration increased, compared to pristine nanoplates. The obtained results suggest that the synthesized Sm-incorporating α-MoO3 2D-layered nanoplate could be a potential antibacterial agent.
... Many transition metal oxides are sportive against microorganisms due to the interaction of hydrophobic and electrostatic forces. The production of reactive oxygen species (ROS) can be explained as follows [51][52][53]. can react with superoxide anion radicals (*O -2 ) to generate hydroxyl radical (*OH), hydroxyl ion (OH -) and singlet oxygen (O 2 ). Negatively charged radicals (hydroxyl radicals and superoxide anions) cannot penetrate microorganism cell membranes, but they can cause critical damage to the bacteria's outer surface, whereas positively charged hydrogen peroxide radicals (*H 2 O 2 ) can easily penetrate negatively charged bacterial cell membranes and kill the bacteria. ...
A chemical co-precipitation route was used to synthesize novel strontium oxide (SrO), SrO-starch composite and various tellurium (Te) concentrations were incorporated in SrO-starch composite. This study aims to enhance the catalytic activities and bactericidal behavior of SrO, SrO-starch composite with different percentage concentrations of Te doping and a fixed amount of starch nanoparticles. XRD affirmed that the dopant contribution was investigated to improve crystallinity. Surface morphological characteristics and elemental composition evaluation were determined using an FE-SEM and EDS exhibit a doping concentration of an element in the synthesized products. The configuration of Sr–O–Sr bonds and molecular vibrations has been indicated by FTIR spectra. In addition, dye degradation of prepared samples was investigated through catalytic activity (CA) in the existence of NaBH4 act as a reduction representative. The Te-doped SrO-starch composite indicates superior catalytic activity and shows a degradation of Methylene blue dye (91.4 %) in an acidic medium. The synthesis nanocatalyst demonstrated impressive antibacterial activity against Staphylococcus aureus (S. aureus) at high and low concentrations exhibiting zones of inhibition 9.30 mm as compared to ciprofloxacin. Furthermore, molecular docking studies of synthesized nanocomposites were performed against selected enzyme targets, i.e., β-lactamaseE.coli and DNA GyraseE.coli.
The multidrug-resistant bacteria induced infections have become one of the serious threats to global public health. There is an urgent need to fight against bacteria using efficient strategies beyond traditional antibiotics treatments. As essential trace element, molybdenum (Mo) is an indispensable component of many enzymes in the living body. The relatively low toxicity and unique physicochemical properties of Mo-based nanomaterials make them develop in various biomedical applications especially in antimicrobial stewardship for curing wound infection, sterilizing biomedical equipment, disinfecting water, and so on. In this review, we introduce the synthetic methods, physicochemical properties-related antibacterial activities, and applications of various Mo-based nanomaterials (MoS2, MoOx, molybdates, Mo-based polyoxometalates (POMs), and their hybrids). Then, the main antibacterial strategies including physical contact, photo-induced antibacterial, enzyme-like catalysis, ions release, and synergistic antibacterial are summarized. The antimicrobial mechanisms oriented by antimicrobial strategies are calssified. Furthermore, their inhibition on antimicrobial resistance (AMR) evolution and their biological safety are discussed. Finally, their challenges and prospects to advance the antibacterial activity are also reviewed.
