Effect of the Structure of a TiO2 Nanotube Arrays on Photocatalytic Activity Prepared by Anodization from Sputtered Ti Film

Authors

  • Watchara Suphap คณะวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยธรรมศาสตร์
  • Chantana Aiempanakit คณะวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยเทคโนโลยีราชมงคลธัญบุรี
  • Kamon Aiempanakit คณะวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยธรรมศาสตร์

Abstract

          In this research, titanium dioxide nanotubes (TNTs) were synthesized via an anodization process from titanium (Ti) film sputtered on indium tin oxide (ITO) glass by a DC magnetron sputtering technique. The TNTs were fabricated by using potential at 30 V and electrolyte solution consisted of ammonium fluoride (NH4F), ethylene glycol (EG), and deionized water at 1-3 vol%. The crystal and surface morphology of TNTs were characterized by an       X-Ray Diffractometer (XRD) and Field Emission Scanning Electron Microscopy (FE-SEM), respectively. The results showed that the average diameters of TNTs with deionized water of 1, 2, and 3 vol% were 45.63, 55.30, and 65.32 nm, respectively. The crystallite size of the annealed TNTs at (004) plane were calculated from the Scherrer equation, which increased from 24.34 nm to 29.53 and 30.61 nm with increasing percent by volume of deionized water. It was found that TNTs prepared with deionized water at 3 vol% showed the highest crystallite size and uniform diameter. The crystal structure and tubular size of TNTs are important factors that affect the photocatalytic reaction. The TNTs were tested for the degradation of methylene blue in an aqueous solution under various UV irradiation times. The best TNTs condition for photocatalytic activity was anodized with deionized water at 3 vol% due to an increase surface area and crystallite size.               Keywords :  Titanium dioxide nanotubes ; Photocatalytic reaction ; Sputtering ; Anodization

Author Biography

Watchara Suphap, คณะวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยธรรมศาสตร์

   

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2022-05-18

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บทความวิจัยจาก The 38th International Conference of the Microscopy Society of Thailand