Reforming Characteristics under Visible Light Response of Cr- or Ag-Doped Prepared by Sol-Gel and Dip-Coating Process

• Published in: International journal of photoenergy Vol. 2012; pp. 1 - 12
• Main Authors: Nishimura, Akira, Mitsui, Go, Nakamura, Katsuya, Hirota, Masafumi, Hu, Eric
• Format: Journal Article
• Language: English
• Published: 2012
• ISSN: 1110-662X; 1687-529X
• DOI: 10.1155/2012/184169

A Cr- or Ag-doped TiO 2 film was prepared by sol-gel and dip-coating process and used as the photocatalyst for CO 2 reforming under the visible light. The ratio of amount of Cr or Ag added to amount of Ti in TiO 2 sol solution ( R ) varied from 0 to 100 wt% or 0 to 50 wt%, respectively. The total layer number of Cr- or Ag-doped TiO 2 film ( N ) coated was changed. The CO 2 reforming performance with the Cr- or Ag-doped TiO 2 film was tested under a Xe lamp with or without ultraviolet (UV) light. As a result, when N equals to 1, the concentration of CO which was a product from CO 2 reforming was maximized in Cr doping case for R = 70 wt% and in Ag doping case for R = 1 wt%, respectively. The best result of concentration of CO = 8306 ppmV, concentration of CH 4 = 1367 ppmV, concentration of C 2 H 6 = 1712 ppmV is obtained when with Cr doping in this study.