Large Scale Synthesis of Nitrogen Doped TiO2 Nanoparticles by Reactive Plasma

Si, Peng; Jiang, Wen; Wang, H.X.; Li, Z.F.; Liu, J.J.; Lee, J.G.; Choi, Chul-Jin

doi:10.1016/j.matlet.2011.10.067

Cited by 17 publications

(7 citation statements)

References 9 publications

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“…The Fe-Ni nanoparticles were prepared by using traditional arc discharge process analogous to our previous work [14,15]. The master invar alloy made by arc-melting of Fe and Ni powders (atomic ratio Fe:Ni = 61:39) served as anode while a tungsten needle served as a cathode.…”

Section: Methodsmentioning

confidence: 99%

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High Hardness Nanocrystalline Invar Alloys Prepared from Fe-Ni Nanoparticles

Choi

2018

Metals

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High-density (>98% of full density) nanocrystalline invar alloys with significantly enhanced hardness (>240 in Vicker's hardness) were prepared by sintering compacted Fe-Ni nanoparticles in hydrogen. The precursor Fe-Ni nanoparticles were synthesized by hydrogen plasma evaporation of bulk Fe 61 Ni 39 alloys. The size and the productivity of the Fe-Ni nanoparticles increased with increasing hydrogen pressure. The presence of surface oxidation of the Fe-Ni nanoparticles when exposed to air was proved by the X-ray photoelectron spectra measurements. The compacted Fe-Ni nanoparticles grew rapidly at 956 • C, while the oxide impurities were removed completely by following hydrogen at 735 • C, which was found to be optimum for the synthesis of oxide-free nanocrystalline metals with fine grain size. The typical hardness of an invar alloy prepared by melting method was around 140 HV. The significantly enhanced hardness of our nanocrystalline invar alloys was potentially important in strengthening the durability of its components in instruments and in improving its machinability when machining for a component.

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Section: Methodsmentioning

confidence: 99%

“…The traditional arc discharge process has been used for synthesis of a number of metallic or oxide nanoparticles with different compositions [14,15]. In this work, we prepared Fe-Ni nanoparticles with arc discharge method and the effect of hydrogen concentration on the hydrogen plasma reaction products was investigated.…”

Section: Introductionmentioning

confidence: 99%

High Hardness Nanocrystalline Invar Alloys Prepared from Fe-Ni Nanoparticles

Choi

2018

Metals

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“…NPs. 218 In particular, a pure titanium-made cylinder is set as the anode, and a tungsten needle is used as the cathode. The results depicted that most N-doped TiO 2 NPs show a disordered surface layer with 5 nm in thickness.…”

Section: Plasma Synthesis Of N-doped Tio 2 Npsmentioning

confidence: 99%

Perspectives on plasma-assisted synthesis of N-doped nanoparticles as nanopesticides for pest control in crops

et al. 2020

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“…Its wide applications, however, have been largely limited by its large band-gap of 3.2 eV for anatase TiO 2 , which only absorbs UV light of wavelengths less than 387 nm, and rapid recombination of photogenerated carriers. In order to utilize solar energy effectively, considerable efforts such as ion doping, noble metal loading, dye sensitization, and composite semiconductors, have been undertaken to narrow the band gap and reduce the recombination of photogenerated carriers [2,3]. In our previous work, an effective approach of Sm, N, and P tridoping into TiO 2 lattices via a modified sol-solvothermal process using tetrabutyl titanate as precursor and absolute ethanol as solvent has been confirmed.…”

Section: Introductionmentioning

confidence: 99%