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Removal of Humic Acid Using Titanium Dioxide Nanotube Thin Film Fabricated by Anodization  

Yun, Dong-Min (Department of Civil Engineering, Hanyang University)
Jang, Jun-Won (Department of Civil Engineering, Hanyang University)
Park, Jae-Woo (Department of Civil Engineering, Hanyang University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.3, 2008 , pp. 339-344 More about this Journal
Abstract
Titanium dioxide nanotubes were fabricated by self-organized electrochemical potentiostatic anodization of titanium thin film with an electrolyte solution of sodium sulfate 1M and sodium flouride 0.5wt% aqueous solution at 20$^{\circ}C$ for 20min. Field Emmision Scanning Electron Microscopy(FE-SEM) and X-ray Diffractometer(XRD) were used to evaluate the micromorphology and crystalline structure of the titanium dioxide nanotube thin film. Titanium dioxide nanotube were fabricated with diameters approx. 100nm and tube length from appox. 1 $\mu$m. Titanium dioxide films formed through anodization and annealing process at 450$^{\circ}C$ contained a phase of anatase. Also, this study was performed to evaluate the application of titanium dioxide thin film for treating humic acid dissolved in water. The reaction tended to follow the Langmuir-Hinshelwood kinetics with zero order. Comparative experiments with thin film and anatase powder showed the same zero order kinetics when 0.3g of powder had been used.
Keywords
Titanium Dioxide; Photocatalyst; Anodization; Humic Acid; Nanotube; Potentiostat;
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