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article

Ion beam induced structural and electrical modifications of Fe doped molybdenum oxide thin films

P. Vats, D. Chauhan, A.K. Patra, V.P. Gupta, more

Materials Science in Semiconductor Processing > 2015 > 31 > Complete > 593-598

In the present paper, structural and electrical properties of 2% Fe doped molybdenum oxide thin films grown by the pulsed laser deposition (PLD) technique have been reported. Ion beam induced modifications of these films were studied under the bombardment of 100MeV Ni ⁸⁺ ions. X-ray diffraction (XRD), Fourier transform infrared spectroscopy, and micro-Raman measurements suggested the formation...

article

Hydrogen Ion Irradiation Effect on the Luminescence of MoS₂ Nanoflowers

Khaled Al Youssef, Adrien Chauvin, Su Yan, Wenjiang Li, more

physica status solidi (a) > 220 > 2 > n/a - n/a

The influence of low kinetic energy hydrogen ion irradiation on the chemical composition and luminescence intensity of MoS₂ nanoflowers (NFs) hydrothermally synthesized is reported. X‐ray photoelectron spectroscopy (XPS) core‐level analysis of the as‐synthesized MoS₂ NFs reveals the presence of the 2H‐MoS₂ (semiconductor) crystal phase and MoO_x. Furthermore, the relative amounts of oxygen and potassium...

article

Synthesis and properties of low‐cost, photochromic transparent hydrogel based on ethaline‐assisted binary tungsten oxide‐molybdenum oxide nanocomposite for optical memory applications

Olayinka Oderinde, Onome Ejeromedoghene, Guodong Fu

Polymers for Advanced Technologies > 33 > 3 > 687 - 699

Tungsten oxide‐based composites are important smart materials for wider usage in efficient energy windows, rewritable inks and other colored displays. However, the problem of agglomeration has made it challenging to be employed in transparent, photo‐reversible materials especially in functional hydrogels. We herein report the preparation of high transparent hydrogel using water‐soluble tungsten oxide‐molybdenum...

article

A Schottky‐Barrier‐Free Plasmonic Semiconductor Photocatalyst for Nitrogen Fixation in a “One‐Stone‐Two‐Birds” Manner

Haoyuan Bai, Shiu Hei Lam, Jianhua Yang, Xizhe Cheng, more

Advanced Materials > 34 > 2 > n/a - n/a

Plasmonic photocatalysis has received much attention owing to attractive plasmonic enhancement effects in improving the solar‐to‐chemical conversion efficiency. However, the photocatalytic efficiencies have remained low mainly due to the short carrier lifetime caused by the rapid recombination of plasmon‐generated hot charge carriers. Although plasmonic metal–semiconductor heterostructures can improve...

article

On the Reduction of MoO₃ to MoO₂: A Path to Control the Particle Size and Morphology

Michael Zoller, Michael O'Sullivan, Hubert Huppertz

Chemistry – A European Journal > 27 > 72 > 18141 - 18149

During the reduction of molybdenum trioxide (MoO₃) to metallic molybdenum, the first reduction step yielding molybdenum dioxide as an intermediary product is of crucial importance. In this study, we examined the impact of the parameters reduction temperature, water influx, and potassium content on the hydrogen reduction of this first reaction step. Beginning from the same starting material, the chemical...

article

Simultaneous Electrochemical Determination of Paracetamol and Allura Red in Pharmaceutical Doses and Food Using a Mo(VI) Oxide‐Carbon Paste Microcomposite

Edgar Nagles, Mario Ceroni, Claudia Villanueva Huerta, John J. Hurtado

Electroanalysis > 33 > 11 > 2335 - 2344

This work presents a new application for MoO₃ combined with carbon paste to prepare a microcomposite electrode (Mo(VI)_Ox/CPE) for the simultaneous determination of paracetamol (PCM) and Allure Red (AR) by square‐wave voltammetry (SWV). The anodic peak currents for PCM and AR were 70.0 and 80.0 % high compared with an unmodified carbon paste electrode. The surface areas of Mo(VI)_Ox/CPE and CPE were...

article

Electrocatalytic Glycerol Oxidation with Concurrent Hydrogen Evolution Utilizing an Efficient MoO_x/Pt Catalyst

Xiaowen Yu, Egon Campos dos Santos, Jai White, Germán Salazar‐Alvarez, more

Small > 17 > 44 > n/a - n/a

Glycerol electrolysis affords a green and energetically favorable route for the production of value‐added chemicals at the anode and H₂ production in parallel at the cathode. Here, a facile method for trapping Pt nanoparticles at oxygen vacancies of molybdenum oxide (MoO_x) nanosheets, yielding a high‐performance MoO_x/Pt composite electrocatalyst for both the glycerol oxidation reaction (GOR) and the...

article

A New Electrochemical Method to Detect Sunset Yellow, Tartrazine and Thiomersal in a Pharmaceutical Dose Using a Carbon Paste Electrode Decorated with Molybdenum Oxide

Johisner Penagos‐Llanos, Olimpo García‐Beltrán, Edgar Nagles, John J. Hurtado

Electroanalysis > 32 > 10 > 2174 - 2182

This report allowed the detection of three substances using a carbon paste decorated with MoO₂ (MoO/CPE). Tartrazine (TZ), sunset yellow (SY) and thiomersal (TMS) were analyzed for adsorptive voltammetry. The electrode was characterized by scanning electron microscopy, energy dispersive spectroscopy and cyclic voltammetry. TZ, SY and TMS were observed at 1.07, 0.80 and 0.95 V respectively. The detection...

article

Numerical analysis of dopant‐free asymmetric silicon heterostructure solar cell with SiO₂ as passivation layer

Haris Mehmood, Hisham Nasser, Tauseef Tauqeer, Raşit Turan

International Journal of Energy Research > 44 > 13 > 10739 - 10753

Conventional silicon heterojunction solar cells employ defects‐prone a‐Si:H layers for junction formation and passivation purposes. Substituting these layers with hole‐selective MoO_x and electron‐selective TiO_x can reduce parasitic absorption and energy band offsets issues associated with doped silicon films. In this work, dopant‐free asymmetric heterostructure Si solar cells are studied with and...

article

Highly Crystalline MoS₂ Thin Films Fabricated by Sulfurization

Peter Hutar, Marianna Spankova, Michaela Sojkova, Edmund Dobrocka, more

physica status solidi (b) > 256 > 12 > n/a - n/a

The 2D transition metal dichalcogenides attract high research interest due to their electronic properties, and MoS₂ is likely the most explored compound of this group. The fabrication of MoS₂ thin films by the sulfurization of predeposited MoO₃ layers on a c‐plane sapphire substrate by radio frequency magnetron sputtering from stoichiometric MoO₃ target is reported. The structure and properties of...

article

The effects of electrolyte on the capacitive behavior of nanostructured molybdenum oxides

Hossein Farsi, Shokufeh Moghiminia, Heidar Raissi, Andrew Riley, more

Journal of Chemical Technology & Biotechnology > 94 > 12 > 3800 - 3805

BACKGROUND Nanostructured metal oxides have shown capabilities in the application of energy conversion and storage. Among a variety of metal oxide semiconducting materials, molybdenum oxide recently became a promising candidate as an electrochemical supercapacitor for storing electrical energy. Supercapacitors, which are storage devices for electrical energy, benefit from the separation of opposite...

article

Electronic Structure of Molybdenum Oxidized in Air

P. A. Dement’ev, E. V. Ivanova, M. N. Lapushkin, D. A. Smirnov, more

Physics of the Solid State > 2019 > 61 > 11 > 1993-1998

The electronic structure of a clean molybdenum surface oxidized in air and upon sodium Na adsorption at submonolayer coating have been studied by photoelectron spectroscopy in situ in an ultrahigh vacuum. The photoemission spectra from the valence band and O 1s, O 2s, Mo 4s, and Na 2p core levels are studied at the synchrotron excitation in the photon energy range 80–600 eV. The spectrum of oxygen...

article

Direct Pyrolysis of Molybdophosphate-based Ionic Salt for One-step Synthesis of N,P Co-doped Carbon/MoO_3-x Hybrids with Superior Lithium Storage Performance

Lifeng Zhang, Kechao Shen, Yongtao Jiang, Yu Guo, more

Chemical Research in Chinese Universities > 2019 > 35 > 5 > 842-847

N,P co-doped carbon/MoO_3-x hybrids(NPC/MoO_3-x) were synthesized via one-step pyrolysis of molyb-dophosphate-based ionic salt precursor. Doped carbon and oxygen vacancies(OVs) were synchronously introduced into the NPC/MoO_3-x hybrids without any other redundant procedure. As anodes for lithium-ion batteries, the NPC/MoO_3-x hybrids delivered a high initial Coulombic efficiency(ICE) of 81% as well as...

article

Structural Properties of Gas-Phase Molybdenum Oxide Clusters [Mo₄O₁₃]²⁻, [HMo₄O₁₃]⁻, and [CH₃Mo₄O₁₃]⁻ Studied by Collision-Induced Dissociation

Manuel Plattner, Aristeidis Baloglou, Milan Ončák, Christian Linde, more

Journal of The American Society for Mass Spectrometry > 2019 > 30 > 10 > 1946-1955

Molybdenum oxide-based catalysts are widely used for the ammoxidation of toluene, methanation of CO, or hydrodeoxygenation. As a first step towards a gas-phase model system, we investigate here structural properties of mass-selected [Mo₄O₁₃]²⁻, [HMo₄O₁₃]⁻, and [CH₃Mo₄O₁₃]⁻ by a combination of collision-induced dissociation (CID) experiments and quantum chemical calculations. According to calculations,...

article

Effect of MoO₃ on the Catalytic Properties of NiO/Al₂O₃ in the Carbon Dioxide Conversion of Methane

K. Dossumov, G. E. Ergazieva, L. K. Myltykbaeva, M. M. Telbaeva, more

Theoretical and Experimental Chemistry > 2019 > 55 > 2 > 137-142

The effect of molybdenum oxide as modifying additive on the catalytic properties of the catalyst NiO/Al₂O₃ obtained by the “solution combustion” method in the carbon dioxide conversion of methane was studied. It was established that the addition of 1 wt.% MoO₃ to the 3 wt.% NiO/γ-Al₂O₃ composition leads to an increase in the specific surface area of the catalyst and the mobility of the surface oxygen,...

article

Durable molybdenum oxide coated solid‐phase microextraction fiber for highly selective and efficient extraction of polycyclic aromatic hydrocarbons in water

Hongmei Liu, Xiaoqi Wang, Hua Fan, Shihao Dang

Journal of Separation Science > 42 > 10 > 1878 - 1885

A bonding method was developed for coating molybdenum oxides onto a steel wire substrate, which was used as a solid‐phase microextraction fiber, was coupled with gas chromatography. Based on the characterization, it is found that the as‐prepared molybdenum oxides material contained a nanobelt structure with a uniform size and good dispersibility. In addition, there were a large number of small protrusions...

article

Enhanced resistive acetone sensing by using hollow spherical composites prepared from MoO₃ and In₂O₃

Wenhao Jiang, Lingling Meng, Sufang Zhang, Xiaohong Chuai, more

Microchimica Acta > 2019 > 186 > 6 > 1-9

Hollow sphere composites were synthesized by a template-free hydrothermal method from MoO₃ and In₂O₃. The spheres have a typical size of 800 ± 50 nm and were characterized by XRD, FESEM, TEM, XPS. Gas sensors based on samples with different Mo/In composite ratios were fabricated and their gas sensing properties were studied. The results show that a Mo:In ratio of 1:1 in the composite gives the highest...

article

Mo‐doped CeO₂ Synthesized by the Combustion Method for Carbon‐Air Solid Oxide Fuel Cell (CA‐SOFC) Applications

I. Díaz‐Aburto, F. Gracia, M. Colet‐Lagrille

Fuel Cells > 19 > 2 > 147 - 159

Molybdenum(Mo)‐doped ceria (CMO) nanoparticles were synthesized by the combustion method with three different Mo compositions: 5 wt.%, 7 wt.%, and 10 wt.%. The catalytic activity of CMO for wet gasification of carbon was studied in a fluidized bed reactor, while the mechanical and electrical properties of this material were characterized using dense sintered CMO pellets. The Young's modulus was found...

article

In Situ Transmission Electron Microscopy Study of Molybdenum Oxide Contacts for Silicon Solar Cells

Haider Ali, Supriya Koul, Geoffrey Gregory, James Bullock, more

physica status solidi (a) > 216 > 7 > n/a - n/a

In this study, a molybdenum oxide (MoO_x) and aluminum (Al) contact structure for crystalline silicon (c‐Si) solar cells is investigated using a combination of transmission line measurements (TLM) and in‐situ transmission electron microscopy (TEM). Cross‐sectional high‐resolution TEM (HRTEM) micrographs reveal a ≈2 nm silicon oxide (SiO_x) interlayer at c‐Si/MoO_x interface in the as‐deposited state,...

article

Porous MoO₃@SiC hallow nanosphere composite as an efficient oxidative desulfurization catalyst

Leila Seifikar Gomi, Maryam Afsharpour

Applied Organometallic Chemistry > 33 > 4 > n/a - n/a

A novel N‐doped MoO₃@SiC hollow nanosphere has been synthesized through two steps. Due to the first step, N‐doped MoO₂@C nanosphere was synthesized using the hydrothermal method and in the second step, Si‐C bonds were formed through the low‐temperature magnesiothermic method and MoO₃@SiC hollow nanosphere was produced. The prepared nanostructures were identified by various techniques such as IR, XRD,...

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Search results

Ion beam induced structural and electrical modifications of Fe doped molybdenum oxide thin films

Hydrogen Ion Irradiation Effect on the Luminescence of MoS₂ Nanoflowers

Synthesis and properties of low‐cost, photochromic transparent hydrogel based on ethaline‐assisted binary tungsten oxide‐molybdenum oxide nanocomposite for optical memory applications

A Schottky‐Barrier‐Free Plasmonic Semiconductor Photocatalyst for Nitrogen Fixation in a “One‐Stone‐Two‐Birds” Manner

On the Reduction of MoO₃ to MoO₂: A Path to Control the Particle Size and Morphology

Simultaneous Electrochemical Determination of Paracetamol and Allura Red in Pharmaceutical Doses and Food Using a Mo(VI) Oxide‐Carbon Paste Microcomposite

Electrocatalytic Glycerol Oxidation with Concurrent Hydrogen Evolution Utilizing an Efficient MoO_x/Pt Catalyst

A New Electrochemical Method to Detect Sunset Yellow, Tartrazine and Thiomersal in a Pharmaceutical Dose Using a Carbon Paste Electrode Decorated with Molybdenum Oxide

Numerical analysis of dopant‐free asymmetric silicon heterostructure solar cell with SiO₂ as passivation layer

Highly Crystalline MoS₂ Thin Films Fabricated by Sulfurization

The effects of electrolyte on the capacitive behavior of nanostructured molybdenum oxides

Electronic Structure of Molybdenum Oxidized in Air

Direct Pyrolysis of Molybdophosphate-based Ionic Salt for One-step Synthesis of N,P Co-doped Carbon/MoO_3-x Hybrids with Superior Lithium Storage Performance

Structural Properties of Gas-Phase Molybdenum Oxide Clusters [Mo₄O₁₃]²⁻, [HMo₄O₁₃]⁻, and [CH₃Mo₄O₁₃]⁻ Studied by Collision-Induced Dissociation

Effect of MoO₃ on the Catalytic Properties of NiO/Al₂O₃ in the Carbon Dioxide Conversion of Methane

Durable molybdenum oxide coated solid‐phase microextraction fiber for highly selective and efficient extraction of polycyclic aromatic hydrocarbons in water

Enhanced resistive acetone sensing by using hollow spherical composites prepared from MoO₃ and In₂O₃

Mo‐doped CeO₂ Synthesized by the Combustion Method for Carbon‐Air Solid Oxide Fuel Cell (CA‐SOFC) Applications

In Situ Transmission Electron Microscopy Study of Molybdenum Oxide Contacts for Silicon Solar Cells

Porous MoO₃@SiC hallow nanosphere composite as an efficient oxidative desulfurization catalyst

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