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Abstract

Crystalline low agglomerated tungsten diselenide (WSe2) nanoparticles were successfully produced by the aerosol synthesis method. The particle size and morphology were changed by process parameters. The products were characterized by X-ray diffraction and high-resolution transmission electron microscopy. The WSe2 nanoparticle morphology varies from a spherical shape to flake-like, layered structures. Usually, as-prepared particles consist of 5–7 single layers of WSe2. These as-synthesized WSe2 nanoparticles were used as anodes to assemble lithium-ion batteries. A high reversible capacity and very stable cycle performance can be obtained, implying that these WSe2 nanostructures could provide new types of electrode materials for rechargeable Li-ion batteries.

Abstract

Synthesis of metal nanoparticles with specific properties is a newly established research area attracting a great deal of attention. Several methods have been put forward for synthesis of these materials, namely chemical vapor condensation, arc discharge, hydrogen plasma—metal reaction, and laser pyrolysis in the vapor phase, microemulsion, hydrothermal, sol-gel, sonochemical, and microbial processes taking place in the liquid phase, and ball milling carried out in the solid phase.

The properties of metal nanoparticles depend largely on their synthesis procedures. In this paper the fundamentals, advantages, and disadvantages of each synthesis method are discussed.

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Homeyer, Katharina Bösebeck, Michael Binnewies, Paul Heitjans Synthesis and Electrochemical Behavior of Nanostructured Copper Particles on Graphite for Application in Lithium Ion Batteries 1415 Ekaterina Vasilyeva, Albert Nasibulin, Oleg Tolochko, Andrey Rudskoy, Anil Sachdev, Xingcheng Xiao Application of WSe2 Nanoparticles Synthesized by Chemical Vapor Condensation Method for Li-Ion Battery Anodes 1429 Peter Jakes, Josef Granwehr, Hans Kungl, Rüdiger-A. Eichel Mixed Ionic–Electronic Conducting Li4Ti5O12 as Anode Material for Lithium Ion Batteries with Enhanced Rate

on Mn/Ti catalysts prepared using chemical vapor condensation (CVC) for low-temperature NO reduction. Acs Catalysis, 3, 1518-1525. DOI: 10.1021/cs3007846. Peña, D. A., Uphade, B. S., & Smirniotis, P. G. (2004). TiO2- supported metal oxide catalysts for low-temperature selective catalytic reduction of NO with NH3: I. Evaluation and characterization of first row transition metals. Journal of Catalysis, 221, 421-431. DOI: 10.1016/j.jcat.2003.09.003. Qi, G. S., & Yang, R. T. (2003). Low-temperature selective catalytic reduction of NO with NH3 over iron and manganese

.M., Vapor phase synthesis of hexagonal shaped single crystal yttria stabilized zirconia nanoparticles using CO 2 laser , Ceramics International 39, 2013, 1103–1109. [8] Simchi A., Ahmadi R., Seyed Reihani S.M., Mahdavi A., Kinetics and mechanisms of nanoparticle formation and growth in vapor phase condensation process , Materials and Design 28, 2007, 850–856. [9] Vasilyeva E.S., Tolochko O.V., Kim B.K., Lee D.W., Kim D.S., Synthesis of tungsten disulphide nanoparticles by the chemical vapor condensation method , Microelectronics Journal 40, 2009, 687–691. [10] Gavillet

, Allard LF, Sun YP. Hot-fluid annealing for crystalline titanium dioxide nanoparticles in stable suspension. J Am Chem Soc. 2002;124:11514–8. 12236766 10.1021/ja0206341 Lin J Lin Y Liu P Meziani MJ Allard LF Sun YP Hot-fluid annealing for crystalline titanium dioxide nanoparticles in stable suspension J Am Chem Soc 2002 124 11514 8 [9] Chin S, Park E, Kim M, Bae GN, Jurng J. Synthesis and photocatalytic activity of TiO2 nanoparticles prepared by chemical vapor condensation method with different precursor concentration and residence time. J Colloid Interface Sci. 2011

-casting method. Chem. Mater. 19 , 3484 (2007). 10.1021/cm0709065 Dong X. Chen H. Zhao W. Li X. Shi J Synthesis and magnetic properties of mesostructured gamma-Fe 2 O 3 /carbon composites by a Co-casting method Chem. Mater. 19 3484 2007 [9] Z. H. Wang, C. J. Choi, B. K. Kim, J. C. Kim, Z. D. Zhang. Characterization and magnetic properties of carbon-coated cobalt nanocapsules synthesized by the chemical vapor-condensation process. Carbon 41 , 1751 (2003). 10.1016/S0008-6223(03)00127-1 Wang Z. H. Choi C. J. Kim B. K. Kim J. C. Zhang Z. D Characterization and magnetic properties

. Nanosized powders have been produced by various methods such as the thermo-chemical spray drying process /6, 7/, mechanical alloying (MA) /8/, and chemical vapor condensation (CVC) 191. Recently, an innovative plasma processing technique of chemical vapor synthesis (CVS) has been developed for manufacturing nanosized powders. Chemical vapor synthesis (CVS) is a process for making fine solid particles by the vapor-phase chemical reactions of precursors. The thermal plasma process provides a high processing rate as well as other advantages for the synthesis of

. These thin films exhibited the minimum band gap energy. Moreover, WSe 2 nanoparticles have been synthesized by chemical vapor condensation method for Li-ion battery anodes [ 28 ]. In this study, WO 3 thin films were spin prepared by spin coating method at different deposition cycles and their sensor responses towards various concentrations of NO 2 gas were investigated. The structural, morphological, optical, and electrical properties of WO 3 films were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), FT-Raman spectra and electrical

D , Goerke O , Tovar M , Kondratenko E , Schubert H . Phase relations in the system TiO 2 -V 2 O x under oxidizing and reducing conditions . J Phase Equilib Diffus 2008 ; 29 : 482 – 7 . 20. Hanaor DA , Sorrell CC . Review of the anatase to rutile phase transformation . J Mater Sci 2011 ; 46 : 855 – 74 . 21. Chin S , Park E , Kim M , Bae G-N , Jurng J . Effect of the support material (TiO 2 ) synthesis conditions in chemical vapor condensation on the catalytic oxidation for 1, 2-dichlorobenzene over V 2 O 5 /TiO 2 . Powder Technol 2012 ; 217 : 388