- Photocatalytic Behaviors of Transition Metal Ions Doped TiO2 Synthesized by Mechanical Alloying
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S.H. Woo, W.W. Kim, S.J. Kim, C.K. Rhee
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J Korean Powder Metall Inst. 2005;12(4):266-272.
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DOI: https://doi.org/10.4150/KPMI.2005.12.4.266
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- Transition metal ions(Ni2+, Cr3+ and V5+) doped TiO_2 nanostructured powders were synthesized by mechanical alloying(MA) to shift the adsorption threshold into the visible light region. The synthesized powders were characterized by XRD, SEM, TEM and BET for structural analysis, UV-Vis and photoluminescence spectrum for the optical study. Also, photocatalytic abilities were evaluated by decomposition of 4-chlorophenol(4CP) under ultraviolet and visible light irradiations. Optical studies showed that the absorption wavelength of transition metal ions doped TiO_2 powders moved to visible light range, which was believed to be induced by the energy level change due to the doping. Among the prepared TiO_2 powders, NiO2+ doped TiO_2 powders, showed excellent photooxidative ability in 4CP decomposition.
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Citations
Citations to this article as recorded by  - Influence of Cu modified surface states by sol gel Technique on Photocatalytic Activity of Titanium dioxide
Zulfiqar Ali, Atta ullah Shah, Zahid Ali, Arshad Mahmood
Materials Chemistry and Physics.2020; 249: 123169. CrossRef
- Tribological Properties of Cu-Ni Alloy Nanopowders Synthesized by Pulsed Wire Evaporation (PWE) Method
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J.S. Oh, J.H. Park, W.W. Kim, C.K. Rhee
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J Korean Powder Metall Inst. 2004;11(5):376-382.
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DOI: https://doi.org/10.4150/KPMI.2004.11.5.376
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- Nanoscale Cu-Ni alloy nanopowders have been produced by a pulsed wire evaporation method in an inert gas. The effect of Cu-Ni alloy nanopowders as additives to motor oil on the tribological properties was studied at room temperature. The worn surfaces were characterized by Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray Spectroscopy (EDS). Cu-Ni alloy nanopowders as additives lowered coefficient of friction and wear rate. It was found that a copper containing layer on the worn surface was formed, and deposited layers of the metal cladding acted as lubricant on the worn surface, reducing the friction coefficient. It was clearly demonstrated that Cu-Ni alloy nanopowders as additives are able to restore the worn surface and to preserve the friction surfaces from wear.
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Citations
Citations to this article as recorded by - A Study on the Thermal Conductivity of Thermal Grease According to Cu-Ni Content
Haneul Kang, Hyunji Kim, Sunghoon Im, Jinho Yang, Sunchul Huh
Key Engineering Materials.2021; 880: 71. CrossRef
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