Process optimization and material properties for nanofluid manufacturing

✍ Scribed by H. Chang; C. S. Jwo; P. S. Fan; S. H. Pai

• Publisher: Springer
• Year: 2006
• Tongue: English
• Weight: 187 KB
• Volume: 34
• Category: Article
• ISSN: 0268-3768
• DOI: 10.1007/s00170-006-0597-0

✦ Synopsis

Using an innovative nanofluid preparation method, ultrasonic-aidedsubmerged arc nanoparticle synthesis system, this paper employs the robustness design method to examine the optimal parameters, such as peak current, pulse duration, open voltage and amplitude of ultrasonic vibration, for obtaining the optimal process for TiO 2 nanofluid preparation. Experimental results show that the proposed manufacturing system can successfully prepare uniformly distributed TiO 2 nanoparticle using the optimal parameters. The pH of the as prepared TiO 2 nanofluid is 7.5, which is much higher than that of isoelectric point, about 4.4. Hence, the suspended TiO 2 nanoparticles already possess electrostatic stability properties. Regarding ultraviolet/visible absorbency, the produced TiO 2 nanofluid would absorb UV energy when the wavelength is 280 nm to 400 nm. According to the UV-Vis absorption spectrum analysis, the energy band gap of the prepared TiO 2 nanoparticle is 3.4 eV.