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a The XPS survey spectra, b the XPS spectra for Mo3d, O 1S, and Al 2P binding energy region of MoO3/Al2O3 (ALD and IM) prepared samples
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MoOx/Al2O3 based catalyst has long been widely used as an active catalyst in Oxidative Desulfurization reaction due to its high stability under severe reaction conditions and high resistance to sulfur poisoning. In this context, 4 and 9 Wt.% MoO3 grafted on mesoporous γ-Al2O3 has been synthesized using the modified atomic layer deposition (ALD) met...
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Citations
... Additionally, MoO 3 thin films can be fabricated by using different cost-effective methods, including thermal evaporation [15], Sol-gel spin coated [16], spray pyrolysis [17,18], atomic layer deposition [19], chemical vapor deposition [20], and hydrothermal method [21], etc. ...
... On the other hand, several methods are employed for preparing MoO 3 thin-film nanostructures like chemical and physical methods [12][13][14][15][16][17][18]. Further, most studies on the synthesis of such MoO 3 thin-film nanostructures have focused on spray pyrolysis [19], hydrothermal [20], electrodeposition [21], thermal evaporation [22], spin coating [23], atomic layer deposition [24], and magnetron sputtering techniques. Despite the development of various synthesis methods, magnetron sputter deposition is the industrially practised technique for the deposition of large-area homogeneous films or coating on different substrates. ...
The detection of phenolic compounds with electrochemical sensors is still very exciting regarding their selectivity, sensitivity, and stability. There is a need yet to operate sensors for ferulic acid (FA) and other phenolic compounds that function reliably under environmental conditions. Herein, we present a FA chemical sensor based on molybdenum trioxide (MoO3) Radiofrequency magnetron-sputtered carbon cloth (CC) thin-film electrode (MoO3/CC). With the lowest limit of detection (LOD) value of 2.3 nM and sensitivity of 0.0249 µA/µM, the sensor performed admirably. The presence of aggregated crystallites with wedge-shaped nanostructures for an average length of 800 nm was discovered using field emission scanning electron microscopy of MoO3 thin films. The MoO3 thin-film X-ray diffraction (XRD) patterns showed an orthorhombic crystal structure. The presence of multiphonon vibrations of Mo sublattice and oxygen atoms was visible in the Raman spectrum. The chemical structure of the resulting film of Mo, O, and C atoms was discovered using X-ray photoelectron spectroscopy. Notably, the sensor was used to authenticate spiked tap water and pineapple juice samples, yielding recaptures ranging from 99.53 to 102.52%, indicating that it could be used as an alternative method for the quantitative identification of FA.
Novel PbMoO 4 /BiOBr nanocomposites were fabricated via a facile ultrasound-assisted impregnation method.
The feasibility of gas phase deposition using a Ti alkoxide precursor for precise surface modification of catalysts was demonstrated by modifying a mesoporous alumina support with a Ti oxide overcoat.
Urea is a chemical compound utilized largely as an industrial and biological molecule and travels in liver to the kidney via bloodstream. For this views, the present work was design with γ-Al2O3QDs, which act as a sensor material for to detect the urea. The γ-Al2O3QDs were processed via solution method and characterized well. The γ-Al2O3QDs was utilize as a sensor material for their sensing efficiency with urea solution. The performance of γ-Al2O3QDs/GCE sensor was tested with different parameters such as effect of different concentration of urea (3.56, 7.815, 15.625, 31.25, 62.5, 125, 250, 500 and 1000 µM in PBS), effect of number of potentials (1×10⁻² to 15×10⁻² mV/s) were applied and checked in PBS. The ability to maintain a produced sensor process continuously cyclic response and electrochemical impedance (EI) were tested. In addition to these, a real sample analysis was also conducted with γ-Al2O3QDs/GCE for tap water samples and analysed.
The production of alternative fuel from the cracking process (CP) of waste cooking oil (WCO) is considered an efficient way to displace the used fossil fuel. The catalytic cracking process was evaluated using praseodymium oxide-supported alumina. The prepared catalysts were characterized by advanced techniques such as XRD, BET, IR, TGA, SEM, and TEM. Different parameters such as praseodymium loading, effect of temperature and effect of catalyst concentration were studied and investigated. The data revealed that the maximum conversion was found to be ∼ 92 % at Pr weight loading of 10 %, temperature of 350 °C, and catalyst weight as a percent of WCO weight is 0.6 %. The routine analysis established that the specifications of the resulting fuel indicate that it conforms to international specifications of fossil fuel. The gas chromatography proved that the percent of hydrocarbons from C5-C16 represents 41.5 % of the liquid biofuel.
The strengthening effect of particle-reinforced copper-based composites mainly depends on the interfacial bonding strength and dispersibility of the reinforcement. However, agglomeration of nanoparticles, as a bottleneck, restricts Orowan's strengthening mechanism. Different from the traditional preparation method for stacked nanoparticles, a hydrothermal method was developed to prepare interconnected bridge-like MoO2 quantum dots. Based on the interconnected structure and the brittleness of MoO2, it can be easily broken and uniformly dispersed into copper matrix during the ball milling process. Due to the dispersion strengthening effect and coherence of the interface between MoO2 and copper, these factors improve the mechanical performance of the composite material synergistically, resulting in simultaneous increases in YS (145.76 MPa), UTS (321.67 MPa), and hardness (94.79 Hv). The effectiveness of YS and UTS enhancement is 234% and 41%, respectively, while maintaining appropriate elongation (20.29%) and conductivity (94.9 IACS). MoO2 quantum dots are used for the first time in this work as particle reinforcements, and we demonstrate that the addition of oxide quantum dots to metal matrix composites can significantly enhance the mechanical properties of the composites by changing the morphology of the quantum dots.
