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Herein we report the hydrothermal synthesis, characterization and biological applications of h-MoO3 and silver doped MoO3 nanoparticles (NPs). The phase formations of the synthesized NPs were identified using X-Ray diffraction studies and vibrational spectral studies. The average crystallite size of the NPs tends to decrease with increase in doping...
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Bio nanocomposite clay-based material Montmorillonite (MMT) and Titanium dioxide (TiO2) are modified for the application to antibacterial effect in waste water. TiO2 is employed because of its photostability, nontoxicity, high activity, and relatively low cost. In that view, the current study investigates the antibacterial potentials of TiO2/MMT na...
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... Suas propriedades térmicas incluem um elevado ponto de fusão, em torno de 795°C, e ebulição atingindo os 1155°C. Além disso, o MoO3 comercial possui densidade na faixa de intervalo de 4,5 a 4,7 g/cm³ (Bandaru et al., 2018;Chiang;Yeh, 2013;De Castro et al., 2017;Raj;Bennie;Xavier, 2021;Wang et al., 2018). ...
... Suas propriedades térmicas incluem um elevado ponto de fusão, em torno de 795°C, e ebulição atingindo os 1155°C. Além disso, o MoO3 comercial possui densidade na faixa de intervalo de 4,5 a 4,7 g/cm³ (Bandaru et al., 2018;Chiang;Yeh, 2013;De Castro et al., 2017;Raj;Bennie;Xavier, 2021;Wang et al., 2018). ...
... Suas propriedades térmicas incluem um elevado ponto de fusão, em torno de 795°C, e ebulição atingindo os 1155°C. Além disso, o MoO3 comercial possui densidade na faixa de intervalo de 4,5 a 4,7 g/cm³ (Bandaru et al., 2018;Chiang;Yeh, 2013;De Castro et al., 2017;Raj;Bennie;Xavier, 2021;Wang et al., 2018). ...
Molybdenum trioxide is an inorganic compound of great scientific and technological relevance due to its unique characteristics, which result in wide applicability. This review article discusses several synthesis methodologies and applications of MoO3, highlighting its physicochemical properties, especially crystalline structure, oxidizing activity and thermal behavior. Furthermore, the industrial specificity of this oxide is addressed, from the areas of catalysis, electrochemistry and electronics, to optics, corroborating the relevance, future research perspectives and potential innovations related to it, especially in the context of nanotechnology.
... Staphylococcus aureus, Bacillus cereus, Citrobacter koseri, and Pseudomonas aeruginosa were used to investigate the antibacterial activity of the nanoparticles. In addition, foxtail and finger millet seed germination was tested over seven days and found the antimicrobial properties (Raj et al., 2021). ...
Nanotechnology is an emerging technology that combines materials science and engineering fundamentals, altogether synthesizing materials at the nanoscale to solve various current problems. Agrochemicals are often used in modern intensive agriculture to protect crops from biotic stress, provide vital nutrients, and boost millet growth and yield. Although they are beneficial in the short term, their long-term and persistent applications damage soil fertility and negatively affect the rhizospheric microbiome. Nanotechnology in the form of nano-based agro-formulations is an innovative, environmentally acceptable, and practical solution for substitute synthetic fertilizers. Nanotechnological formulations and nanoparticles in the form of nanopesticides, nanoherbicides, nanogels, nanofertilizer, and nanofungicides are reported to have efficacy in continuous release of nutrients regulated distribution to plant nutrients very effectively. These nanoformulations helps in fighting phytopathological diseases, promotes plant, and microbiome productivity. In addition, they are effective in alleviating biotic and abiotic stress in crop plants. However, despite their extraordinary effectiveness, they also have several drawbacks, such as a tedious manufacturing process, shaky delivery, and dosage-sensitive effectiveness. Learning and acknowledging the influence of nano-based agrochemicals on highly nutritious crops such as millets is important for further commercialization and wide utilization in agriculture. Hence, this chapter focuses on the usage of nanoformulations on millet crops, their effects on soil rhizospheric communities, and soil fertility.KeywordsNanoformulationsRhizosphereMilletsSoil biotaMillet-grown soils
... 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]. ...
... 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]. Among various dopant elements, samarium is considered a less toxic and good one for enhancing the physical properties of transition metal oxides in the case of biological and other relevant applications [96]. ...
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.
... The lattice parameters "a" and "c" for the hexagonal phase of MoO 3 were calculated by considering the {h, k, l} plane values from the following equation [28]. ...
With the objective of development of electrochemical charge storage devices, currently the research in this field is centred on the study of MoO 3 nanoparticles doped with copper as an efficient supercapacitor electrode material. The synthesized nanoparticles were examined by powder X-ray diffraction which determined the metastable hexagonal phase of MoO 3 and their morphologies were examined using scanning electron microscopy displaying regularly arranged well-defined microrods. The typical vibrational bands of MoO were identified from Infra-red and Raman spectral analysis. The ultra violet diffuse reflectance spectra revealed the decrease in optical band gap from 2.96 to 2.78 eV with an increase in Cu concentration. The surface area was recorded to be higher for 5% wt Cu doped nanoparticles (14 m 2 /g) which was examined from Brunauer-Emmett-Teller (BET) isotherms. Electrochemical behaviour of the nanoparticles was probed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy measurements for which a maximum specific capacitance (C sp) value of 530 Fg −1 was achieved for 5% wt Cu doped MoO 3 nanoparticles.
In this present, we report the synthesis of surface modified zinc oxide (ZnO) nanoparticles (NPs) using chemical method (Z) as well as green method using Beta vulgaris extract (BvZ). The band gap energy of BvZ (3.14 eV) was found to be greater than that of Z (3.0 eV) owing to its smaller particle size. The X-ray diffraction patterns reveal the reduction in crystallite size for BvZ when compared to Z. TEM and SEM images show the agglomeration of particles for BvZ and spherical morphology for Z. The XPS spectra of the BvZ NPs were studied to confirm the oxidation state of Zn ions. Antimicrobial activities of BvZ and Z were tested against bacterial strains such as Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus cereus and fungal strains viz., Candida tropicalis and Aspergillus niger. The seed germination property of BvZ for chickpea seeds was also studied.
