Formation of TiN–Ir particle films using pulsed-laser deposition and their electrolytic properties in producing hypochlorous acid

✍ Scribed by H. Deno; T. Kamemoto; S. Nemoto; A. Koshio; F. Kokai

• Book ID: 104002218
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 875 KB
• Volume: 254
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2007.10.019

✦ Synopsis

Using sintered TiN and TiN-Ir (Ir contents: 5.9-14.2 at.%) targets, pulsed-laser deposition (PLD) was carried out to produce thin films composed of nanoparticles and particulates in the presence of nitrogen gas. The size (2-100 nm) of the produced crystalline TiN nanoparticles increased as nitrogen pressure was increased in the range from 1.33 to 1.33 Â 10 2 Pa. At a pressure of 1.33 Â 10 3 Pa, amorphous TiN nanoparticles combined in the form of chains. Large Ir particulates with diameters of up to 2 mm were particularly prominent in TiN-Ir films. Size distributions of the Ir particulates were dependent on ablation laser wavelength; that is, the diameter decreased at laser wavelength shortened. The TiN-Ir films with different Ir contents and morphologies on Ti substrates were evaluated as electrolysis electrodes for water disinfection. The highest current efficiency was 0.45%, which is comparable to that of conventional Ti-Pt electrodes, for a chloride-ion concentration of 9 mg dm À3 .