Seeded growth synthesis of W nanoparticles in reduction process of WO2 by hydrogen
Source abstract
Abstract
Abstract In this study, a seeded growth strategy was employed to prepare W nanoparticles (NPs) with controlled sizes through the growth of W nanoseeds via chemical vapor transport in hydrogen reduction process of WO2. It was found that the formation of sufficient dispersed W nuclei and the chemical vapor transport of W source (WO2(OH)2) were the two most crucial issues for the synthesis of W NPs. In the hydrogen reduction of WO2, it was hard to produce W NPs due to the difficulty of forming sufficient stable dispersed W nuclei. However, when WO2 contained different amounts of pre-fabricated W nanoseeds (25 nm, 12 mass% - 40 mass%) were used as raw materials, W NPs with the average sizes ranged from 35 nm to 180 nm can be successfully synthesized. The presence of W nanoseeds can promote the hydrogen reduction of WO2 and noticeably decrease the activated energy from 173.3 kJ/mol to 95.5–112.0 kJ/mol. The mechanisms of chemical vapor transport, nucleation, growth and reduction kinetics in the reduction of WO2 by hydrogen were investigated in detail. This method has a great potential for the industrial production of W NPs.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced materials and composites · Gas Sensing Nanomaterials and Sensors · Transition Metal Oxide Nanomaterials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (50)
Show source-provided references
1. Preparation of ultrafine-grained/nanostructured tungsten materials: an overview10.1016/j.jallcom.2018.11.279 ↗
2. W-Y2O3 composite nanopowders prepared by freeze-drying method and its sintering characteristics10.1016/j.jallcom.2019.07.214 ↗
3. Shape-controlled synthesis of colloidal metal nanocrystals: thermodynamic versus kinetic products10.1021/jacs.5b04641 ↗
4. Review of the methodologies used in the synthesis gold nanoparticles by chemical reduction10.1016/j.jallcom.2019.05.153 ↗
5. Nonclassical nucleation and growth of inorganic nanoparticles10.1038/natrevmats.2016.34 ↗
6. Thermodynamics versus kinetics in nanosynthesis10.1002/anie.201402986 ↗
7. Seed-mediated growth of colloidal metal nanocrystals10.1002/anie.201604731 ↗
8. Kinetically controlled seeded growth synthesis of citrate-stabilized gold nanoparticles of up to 200 nm: size focusing versus Ostwald ripening10.1021/la201938u ↗
9. Seeded growth synthesis of uniform gold nanoparticles with diameters of 15− 300 nm10.1021/jp1106982 ↗
10. Tungsten nanoparticles from liquid-ammonia-based synthesis10.1039/c3cc49854a ↗
11. Seeded growth synthesis of composition and size-controlled gold–silver alloy nanoparticles10.1021/acs.jpcc.5b02728 ↗
12. Kinetic analysis of densification behavior of nano-sized tungsten powder10.1111/j.1551-2916.2012.05282.x ↗
13. Synthesis, sintering, and mechanical properties of nanocrystalline cemented tungsten carbide - a review10.1016/j.ijrmhm.2008.07.011 ↗
14. The study on low temperature sintering of nano-tungsten powders10.1016/j.ijrmhm.2016.10.003 ↗
15. Refractory metal nanopowders: synthesis and characterization10.1016/j.cossms.2009.10.001 ↗
16. Microstructure and fracture toughness of electrodeposited Ni-21 at.% W alloy thick films10.1016/j.actamat.2017.10.001 ↗
17. Ultra-rapid processing of high-hardness tungsten–copper nanocomposites10.1016/j.scriptamat.2015.11.012 ↗
18. Microstructures and properties of ultrafine grained W–ZrC composites10.1016/j.jallcom.2014.10.128 ↗
19. Generation and characterization of nano-tungsten particles formed by wire explosion process10.1016/j.jallcom.2008.07.092 ↗
20. Fabrication and characterization of nanocrystalline ODS-W via a dissolution-precipitation process10.1016/j.ijrmhm.2019.01.002 ↗
21. Hydrogen reduction of tungsten oxides: alkali additions, their effect on the metal nucleation process and potassium bronzes under equilibrium conditions10.1016/j.ijrmhm.2016.06.015 ↗
22. Interaction of tungsten nanopowders with air under different conditions10.1016/j.scriptamat.2004.10.029 ↗
23. Chemical vapor synthesis (CVS) of tungsten nanopowder in a thermal plasma reactor10.1016/j.ijrmhm.2008.06.002 ↗
24. A study of formation of nanometric W by room temperature mechanosynthesis10.1016/S0925-8388(03)00125-7 ↗
25. Synthesis of tungsten nanopowders: comparison of milling, SHS, MASHS and milling-induced chemical processes10.1016/j.apt.2015.07.004 ↗
26. Single-step pathway for the synthesis of tungsten nanosized powders by RF induction thermal plasma10.1016/j.ijrmhm.2011.09.002 ↗
27. Plasma expansion synthesis of tungsten nanopowder10.1016/j.jallcom.2017.07.207 ↗
28. Formation and size control of tungsten nano particles produced by Nd : YAG laser irradiation10.1016/S1359-6462(01)00758-8 ↗
29. Low temperature preparation of tungsten nanoparticles from molten salt10.1016/j.powtec.2013.11.052 ↗
30. Synthesis of tungsten nanoparticles by solvothermal decomposition of tungsten hexacarbonyl10.1016/j.ijrmhm.2009.01.005 ↗
31. Shape-controlled synthesis of ultrafine molybdenum crystals via salt-assisted reduction of MoO2 with H210.1021/acs.jpcc.8b01236 ↗
32. Controlled growth of sub-10 nm gold nanoparticles using carbon monoxide reductant10.1021/jp107945d ↗
33. Rapid seeded growth of monodisperse, quasi-spherical, citrate-stabilized gold nanoparticles via H2O2 reduction10.1021/la3027804 ↗
34. A low-cost, efficient, and industrially feasible pathway for large scale preparation of tungsten nanopowders10.1016/j.ijrmhm.2018.08.013 ↗
35. Study on hydrogen reduction of ultrafine MoO2 to produce ultrafine Mo10.1021/acs.jpcc.5b11394 ↗
36. The vaporization of molybdenum and tungsten oxides10.1021/j150565a001 ↗
37. Volatility of the oxides of tungsten and molybdenum in the presence of water vapour10.1038/163601b0 ↗
38. ChemInform abstract: developments in measuring and calculating chemical vapor transport phenomena demonstrated on Cr, Mo, W, and their compounds
39. Preparation of tungsten carbides by reducing and carbonizing WO2 with CO10.1016/j.jallcom.2018.02.224 ↗
40. Reduction of tungsten oxides with carbon. Part 2. Tube furnace experiments10.1016/0040-6031(96)02813-4 ↗
41. Reduction of tungsten oxides with hydrogen and with hydrogen and carbon10.1016/0040-6031(96)02951-6 ↗
42. Size-controlled synthesis of nano Mo powders via reduction of commercial MoO3 with carbon black and hydrogen10.1016/j.ijrmhm.2018.12.019 ↗
43. Lassner · 1999 · 124
44. Mechanisms of the hydrogen reduction of molybdenum oxides10.1016/S0263-4368(02)00029-X ↗
45. Preparation of ultrafine/nano Mo particles via NaCl-assisted hydrogen reduction of different-sized MoO2 powders10.1016/j.ijrmhm.2019.01.020 ↗
46. Preparation of SiS and SiO2 nanospheres10.1021/acs.iecr.7b03292 ↗
47. Pyrophoric behaviour of ultrafine Mo powder10.1016/j.corsci.2017.09.006 ↗
48. Vapour growth of bulk crystals by PVT and CVT10.1016/j.pcrysgrow.2005.06.003 ↗
49. Mechanisms of nucleation and growth of nanoparticles in solution10.1021/cr400544s ↗
50. Study on kinetics of hydrogen reduction of MoO210.1016/j.ijrmhm.2013.05.009 ↗