Photocatalytic performance of V2O5/TiO2 materials prepared by chemical vapor condensation and impregnation method under visible-light

• Published in: Powder technology 2014-05, Vol.258, p.352-357
• Main Authors: Cha, Woojoon, Chin, Sungmin, Park, Eunseuk, Yun, Seong-Taek, Jurng, Jongsoo
• Format: Article
• Language: English
• Subjects: Applied sciences; Catalysis; Catalytic reactions; Chemical engineering; Chemical vapor condensation; Chemistry; Exact sciences and technology; General and physical chemistry; Miscellaneous; Solid-solid systems; TEM; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Ti 3; V2O5/TiO2; XPS
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2014.03.012

In this study, we prepared V2O5/TiO2 nanosized materials by chemical vapor condensation (CVC) and impregnation for visible-light photocatalysis. The physicochemical surface characteristics and optical properties of all samples were determined by XRD, BET, HR-TEM, XPS, UV–visible spectroscopy, and photoluminescence (PL) spectroscopy, and the visible-light photocatalytic performance was evaluated. The materials prepared using CVC-TiO2 had a larger specific surface area, with very small particles in the amorphous phase, as well as a greater number of Ti3+ ions and hydroxyl groups, and lower PL intensity. The band gap of V2O5/TiO2 narrowed with increased V2O5 loading, resulting in increased photocatalytic activity and enhanced visible-light absorbance. The photocatalytic activity of V2O5/CVC-TiO2 was twice that of a sample obtained using commercial TiO2 (Daegussa, P25). [Display omitted] •The intensity of Ti3+ in CVC-materials were higher than in P25-materials.•The CVC-materials contained only amorphous anatase and small particles.•PL intensities of CVC-materials were very low.•Photocatalytic activity of V2O5/CVC-TiO2 was double V2O5/P25-TiO2.