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Masoud Khani, Seyyed Ebrahim Mousavi, Hassan Pahlavanzadeh, Habib Ale Ebrahim, Abbas Mozaffari
In the present study, a detailed investigation was carried out on MoO3 alumina-supported catalysts behavior in selective catalytic reduction of SO2 to sulfur with CH4 . At first, four different molybdenum catalysts with weight rates of 0, 5, 10, and 15 were impregnated on γ-alumina to be characterized using XRD, SEM, BET, BJH, and N2 adsorption. Then, to find the most active catalyst, temperature dependency test was performed on all of the prepared catalysts and the result representing Al2O3-Mo10 as the best catalyst...
February 7, 2019: Environmental Science and Pollution Research International
Nahid Kaisar, Syed Ali Abbas, Jiang Ding, Hsin-An Chen, Chun-Wei Pao, Karunakara Moorthy Boopathi, Anisha Mohapatra, Yu-Ting Chen, Sheng Hui Wu, Jason Fang, Shyankay Jou, Chih Wei Chu
Dissolution of lithium polysulfide (LiPS) into the electrolyte during discharging, causing shuttling of LiPS from the cathode to the lithium (Li) metal, is mainly responsible for the capacity decay and short battery life of lithium-sulfur batteries (LSBs). Herein, we designed a separator comprising polypropylene (PP) coated with MoO3 nanobelts (MNBs), prepared through facile grinding of commercial MoO3 powder. The formation of Li2Sn-MoO3 during discharging inhibited the polysulfide shuttling; during charging, Li passivated LixMoO3 facilitated ionic transfer during the redox reaction by decreasing the charge transfer resistance...
January 28, 2019: Nanoscale
J L Xu, S C Tao, L Z Bao, J M Luo, Y F Zheng
The porous Ti-Mo alloys were prepared by microwave sintering, and the effects of Mo contents on the pore structure, phase composition, compressive strength, elastic modulus, bending strength, corrosion resistance and cytocompatibility of porous Ti-Mo alloys were investigated. The results show that the porous Ti-Mo alloys are composed of α phase and β phase, and the volume fraction of β phase increases with increasing the Mo contents. The amount of Kirkendall pores distributed over the porous Ti-Mo alloys skeleton increases with increasing the Mo contents, which greatly increases the porosities and pore sizes of the porous Ti-Mo alloys...
April 2019: Materials Science & Engineering. C, Materials for Biological Applications
Ding Zou, Fafu Yang, Qixin Zhuang, Mingguang Zhu, Yunxiang Chen, Guofeng You, Hongyu Zhen, Zhenghuan Lin, Qidan Ling
Perylene diimide based small molecules are widely used as intermediates of liquid crystals due to the high planarity and electron mobility. In this work, a small molecule tetrachloro-perylene diimide (TCl-PDI) replacing TiO2 served as electron-transporting material (ETM) for the planar perovskite solar cells (PVSCs). Among hole-transporting materials of PVSCs, poly(3-hexylthiophene) (P3HT) endows the devices highest stability and reproducibility. Therefore, the PVSCs with the structure of ITO/electron-transporting layer/perovskite/P3HT/MoO3/Ag was used to value the performances of new ETMs...
January 11, 2019: ChemSusChem
Wei Huang, Jinhu Wang, Jiayan Du, Yuequan Deng, Yi He
Logic systems that yield two or more signal outputs in the presence of the input are scarce. A universal logic system consisting of plasmonic MoO3-x nanodots and 3,3'-diaminobenzidine (DAB) for fabrication of visual contrary logic pairs and circuits are presented here. They do not require the use of expensive instrumentation but can be visually read. It is based on the facts that the blue dispersion of MoO3-x nanodots turns to colorless after oxidation, while the colorless reagent DAB is oxidized by various oxidants to generate a brown color...
January 9, 2019: Mikrochimica Acta
Jia-Ming Zhu, Mojgan Hosseini, Ali Fakhri, Saboura Salari Rad, Tayebeh Hadadi, Nastaran Nobakht
In the present work we report the enhanced UV light photocatalytic performance of cadmium titanate photocatalyst by MoO3 for Drug pollutant degradation. The nano photocatalyst sample was synthesized employing the Pechini-ultrasonic-hydrothermal route. Therefore, the nano photocatalyst were characterized by various analytical devices. The wide scan X-ray photoelectron spectral study confirmed the MoO3 in the CdTiO3 matrix. The crystallite size calculated with the Debye-Scherrer equation (55.4, 57.0, 61.2 and 63...
December 21, 2018: Journal of Photochemistry and Photobiology. B, Biology
Hynek Balcar, Martin Kubů, Naděžda Žilková, Mariya Shamzhy
Highly active olefin metathesis catalysts were prepared by thermal spreading MoO3 and/or MoO2 (acac)2 on MWW zeolites (MCM-22, delaminated MCM-56) and on two-dimensional MFI (all in NH4 + form). The catalysts' activities were tested in the metathesis of neat 1-octene (as an example of a longer chain olefin) at 40 °C. Catalysts with 6 wt % or 5 wt % of Mo were used. The acidic character of the supports had an important effect on both the catalyst activity and selectivity. The catalyst activity increases in the order 6MoO3 /HZSM-5(25) (Si/Al = 25) < 6MoO2 (acac)2 /MCM-22(70) < 6MoO3 /2D-MFI(26) < 6MoO3 /MCM-56(13) < 6MoO3 /MCM-22(28) reflecting both the enhancing effect of the supports' acidity and accessibility of the catalytic species on the surface...
2018: Beilstein Journal of Organic Chemistry
Haiwen Dai, Ashutosh Rath, Shu Hearn Yu, Stephen J Pennycook, Daniel H C Chua
Reduced molybdenum oxide, generally MoO3-x, is a family of conductive metal oxides. During the reduction from MoO3 to various MoO3-x phases, the dielectric material becomes increasingly metallic all the way to MoO2. The interesting property through oxygen control has recently intrigued research of the MoO3-x family in multiple research areas including electrical and electrochemical application. One of the research difficulties in reduced molybdenum oxide is the lack of effective tools to control the oxygen level...
December 11, 2018: Journal of Physical Chemistry Letters
Geon-Hee Nam, Kyounghwan Kim, Dae Sung Chung
Here we introduce a junction engineering approach to realize a high performance non-power-driven organic photodiode. To overcome the external power source dependency of conventional photodiodes, in this work, we try not only to implement an inherently large built-in-potential of the junction but also to utilize an inherently low charge carrier concentration of the semiconductor. The strategically designed ITO/plasma-treated ZnO/poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene] (MEH-PPV)/MoO3 /Ag geometry showed near-ideal Schottky junction properties with a high zero-bias built-in potential of 0...
February 1, 2019: Nanotechnology
Niting Zeng, David G Hopkinson, Ben F Spencer, Simon G McAdams, Aleksander A Tedstone, Sarah J Haigh, David J Lewis
Direct synthesis of either 2H-MoS2 or α-MoO3 is made possible by thermolysis of the same single source precursor in either argon or air at moderate temperatures.
December 4, 2018: Chemical Communications: Chem Comm
Min Lu, Xiaoyu Zhang, Xue Bai, Hua Wu, Xinyu Shen, Yu Zhang, Wei Zhang, Weitao Zheng, Hongwei Song, William W Yu, Andrey L Rogach
Lead halide perovskite nanocrystals are currently under intense investigation as components of solution-processed light-emitting devices (LEDs). We demonstrate LEDs based on Ag doped-passivated CsPbI3 perovskite nanocrystals with external quantum efficiency of 11.2% and an improved stability. Ag and trilayer MoO3 /Au/MoO3 structure were used as cathode and anode, respectively, which reduce the electron injection barrier and ensure the high transparency and low resistance of the anode. Silver ions diffuse into perovskite film from the Ag electrode, as confirmed by the elemental mapping, the presence of Ag 3d peaks in the X-ray photoelectron spectrum, and the peak shift in the X-ray diffraction patterns of CsPbI3 ...
July 13, 2018: ACS Energy Letters
Nicolay J Pineau, Julia F Kompalla, Andreas T Güntner, Sotiris E Pratsinis
Gas sensor arrays often lack discrimination power to different analytes and robustness to interferants, limiting their success outside of research laboratories. This is primarily due to the widely sensitive (thus weakly-selective) nature of the constituent sensors. Here, the effect of orthogonality on array accuracy and precision by selective sensor design is investigated. Therefore, arrays of (2-5) selective and non-selective sensors are formed by systematically altering array size and composition. Their performance is evaluated with 60 random combinations of ammonia, acetone and ethanol at ppb to low ppm concentrations...
November 28, 2018: Mikrochimica Acta
Mohana Marimuthu, B Praveen Kumar, L Mariya Salomi, Murugan Veerapandian, Krishnaswamy Balamurugan
Hybrid nanosystem with impeccable cellular imaging and antioxidant functionality is demonstrated. The microwave-irradiation derived molybdenum trioxide nanoparticles (MoO3 NPs) were surface functionalized with cationic dye molecule, methylene blue (MB), which enables superior UV-visible absorbance and fluorescence emission wavelengths potential for bioimaging. Radical scavenging property of the pristine MoO3 NPs and MoO3-MB NPs were studied in vivo using Caenorhabditis elegans as model system. Heat shock induced oxidative stress in the C...
November 27, 2018: ACS Applied Materials & Interfaces
Kai Li, Jingwen Ma, Xinglong Guan, Hongwei He, Min Wang, Guoliang Zhang, Fengbao Zhang, Xiaobin Fan, Wenchao Peng, Yang Li
Electrolyzing water as a sustainable energy source is a promising and appealing method to resolve the environmental crisis. Developing efficient and stable bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is crucial and challenging in the overall water splitting process. Herein, we report the synthesis of Ni(PO3)2-MoO3 nanorods anchored on nickel foam (Ni(PO3)2-MoO3/NF) within a two-step strategy and their application as a bifunctional water splitting electrocatalyst...
November 27, 2018: Nanoscale
Chenglin Yan, Kai Tang, Sidra Anis Farooqi, Xianfu Wang
Diminution in fossil-fuel resources and rise in energy demands require us to pursuit sustainable and rechargeable energy-storage alternatives including batteries and supercapacitors, whose electrochemical properties depend largely on the electrode materials. In the past decades, numerous electrode materials with excellent electrochemical energy-storage capability, long life span, and environmentally acceptable quality have been developed. Among the existed materials, molybdenum oxides containing MoO3 and MoO2 as well as their composites are very fascinating contenders for competent energy-storage devices because of their exceptional physicochemical properties like the thermal stability, high theoretical capability and mechanical strength...
November 26, 2018: ChemSusChem
Yanbing Li, Zhiliang Jin, Haiyu Wang, Yupeng Zhang, Hai Liu
Effectiveness and stability of photocatalyst are of importance not only for improving H2 evolution, but also for the realization of enhanced semiconductors property in practical applications. In this study, a novel MoO3 @Ni2 P hybrid nanostructure is successfully prepared by a two step strategy of one-pot pyrolysis followed by calcination method. The reasonable design and controllable preparation of MoO3 @Ni2 P make it exhibit much high photocatalytic activities for H2 evolution with about 39.8 and 15.8 times compared to the pure MoO3 and Ni2 P...
November 13, 2018: Journal of Colloid and Interface Science
Connor Wolenski, Aaron Wood, Cherian J Mathai, Xiaoqing He, Jacob McFarland, Keshab Gangopadhyay, Shubhra Gangopadhyay, Matthew R Maschmann
Surface reactions between heated aluminum nanoparticles (Al NPs) and thin α-MoO3 sheets are investigated. Localized photothermal heating on Al NP clusters is provided by a Raman spectrometer laser, while enhanced heating rates and imaging resolution are enabled by the use of a plasmonic grating substrate. Prominent linear reaction zones extending from Al NPs in the 〈001〉 crystal direction are observed on the surface of the host MoO3 sheets after heating. Raman spectroscopy and x-ray diffraction indicate that α-Al2 O3 is generated within these extended reacted regions, while AFM and SEM indicate that the topology of the reaction regions are indistinguishable from the MoO3 host...
January 25, 2019: Nanotechnology
Yanting Yin, David A Lewis, Gunther G Andersson
MoO3 is widely used in polymer-based organic solar cells as an anode buffer layer due to its high workfunction and formation of a strong dipole at the MoO3 /polymer interface facilitating the charge transfer across the MoO3 /polymer interface. In the present work we show that exposure of the MoO3 /polymer interface to moisture attracts water molecules to the interface via diffusion. Due to their own strong dipole water molecules counter the dipole at the MoO3 /polymer interface. As a consequence, the charge transfer across the MoO3 /polymer will reduce and affect the charge transport across the interface...
November 22, 2018: ACS Applied Materials & Interfaces
Xiaohu Luo, Qiulan Zhou, Shuo Du, Ji Li, Lei Zhang, Kaidong Lin, Huan Li, Bo Chen, Tao Wu, Dongchu Chen, Menglei Chang, Yali Liu
The development of the outstanding noble-metal-free electrocatalysts for the hydrogen evolution reaction (HER) has attracted the broad interest. Herein, a novel one-dimensional (1D) HER hybrid catalyst consisted of cobalt phosphide (CoP) and molybdenum carbide (Mo2C) nanoparticles wrapped by the nitrogen-doped graphitic carbon (called as CoP/Mo2C-NC) was successfully fabricated by a facile continuous flow method and a simple two-step annealing process. During these processes, the successful synthesis of the MoO3 nanorods coated by cobalt zeolitic imidazolate frameworks (Co-ZIF-67) (Co-ZIF-67@MoO3) through the continuous flow method plays a key step...
November 21, 2018: ACS Applied Materials & Interfaces
Bougar Sarr, Abdou Mbaye, Cheikh Abdoul Khadir Diop, Frederic Melin, Petra Hellwig, Mamadou Sidibé, Yoann Rousselin
The organic-inorganic title salt, (C6 H16 N)2 [MoO4 ] or ( i Pr2 NH2 )2 [MoO4 ], was obtained by reacting MoO3 with diiso-propyl-amine in a 1:2 molar ratio in water. The molybdate anion is located on a twofold rotation axis and exhibits a slightly distorted tetra-hedral configuration. In the crystal structure, the diiso-propyl-ammmonium ( i Pr2 NH2 )+ cations and [MoO4 ]2- anions are linked to each other through N-H⋯O hydrogen bonds, generating rings with R 12 12 (36) motifs that give rise to the formation of a three-dimensional network...
November 1, 2018: Acta Crystallographica. Section E, Crystallographic Communications
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