In this study, mechanical alloying was done by a high-energy planetary ball milling technique. A mixture of NiO and MoO3 and graphite powders were used as initial materials. After milling of powder mixture with 40 wt.% additional graphite, a temperature of 400, 550 and 1000 °C for 1 h was considered for the heat treatment of powder mixture. Also, powder mixtures containing 60, 80 and 100 wt.% a...

In addition to using conventional lubricants, such as oil and grease, rolling bearings can also be used with a dry lubricant. For example, the use of lubricant systems is necessary when application oils or greases not possible (e.g., at high temperatures in aerospace applications). The requirements solid are reduce friction wear mechanical contact partners. this work, molybdenum-based coating s...

Mo-Si-based superalloys are of interest as a new family of high-temperature materials to replace Ni-based alloys. By means of in situ environmental transmission electron microscope, the transient period of the early oxidation of Mo3Si was investigated at the nanometer scale. As a result of a competition between loss of volatile MoO3 and association of SiO2 molecular units into pillars, a nanome...

The molecular structures and reactivity of tantalum oxide-supported metal oxide (V2O5, Nb2O5, CrO3, MoO3, WO3, and Re2O7) catalysts were determined by Raman spectroscopy and the methanol oxidation chemical probe reaction, respectively. The metal oxides form a twodimensional surface metal oxide overlayer on the tantalum oxide support. Under ambient conditions, the hydrated surface metal oxide sp...

The formation of the crystalline phases M2, M1, orthorhombic MoO3, and a tetragonal M5O14 (M=Mo,V,Nb) type phase during heat treatment of an amorphous Mo-V-Te-Nb oxide precursor in helium is investigated applying in-situ X-ray diffraction. The precursor was synthesized by precipitation, spray-drying and subsequent calcination of the dried orange powder in air at 275°C. Crystallization of M2 sta...

In order to raise possible ways of MoO3 synthesis and improve its existing applications, nanomaterial was successfully synthesized through the solvo-hydrothermal route by utilizing a mixture ionic liquid (1-butyl-3-methylimidazolium bromide) as solvent, water co-solvent in 1:1 ratio. The morphology structural parameters IL-as­sisted product were examined X-ray diffraction (XRD), Fourier-transfo...

Metal-organic molybdenum complexes were synthesized by the hydrothermal method using ammonium heptamolybdate as metallic source, and organic ligand terephthalic acid (BDC) or bis(2-hydroxyethyl) terephthalate (BHET), obtained via glycolysis of poly(ethylene)terephthalate (PET). The BDC-Mo BHET-Mo characterized XRD, N2 physisorption, TGA, ATR-FTIR, SEM, XPS their in vitro biocompatibility was te...

In chemical vapor deposition (CVD), homogeneous molybdenum concentration is important in synthesizing uniform thickness and large coverage of two-dimensional disulfide (2D-MoS2) films. Here, we synthesize few-layer MoS2 films with adequate over 50 mm2 size area using ultra-low trioxide (MoO3) precursor placed directly under a face-down silicon dioxide/silicon (SiO2/Si) substrate one-step heatin...

Morphology transformation and crystal growth strategies of metal oxide semiconductors are still extensively studied in material science recently, because the morphology crystallinity significantly affect physicochemical characteristics nanomaterials. However, understanding changes ?-MoO3 induced by annealing is a challenge. Herein, nanostructure transition temperature carefully investigated via...

Chlorodifluoromethane (HCFC-22) is one of the air pollutants that destroy ozone layer and warm earth. In order to degrade HCFC-22, catalytic hydrolysis method currently most effective environmental technology. Herein, we prepare solid acid MoO3/ZrO2 base MgO/ZrO2 catalysts for degradation with a particular focus on revealing effects catalyst preparation methods, calcination temperatures, temper...