Fe2WO6/TiO2, an efficient visible-light photocatalyst driven by hole-transport mechanism

作者：Rawal Sher Bahadur; Ojha Devi Prashad; Sung Sang Do; Lee Wan In^*

来源：Catalysis Communications, 2014, 56: 55-59.

DOI：10.1016/j.catcom.2014.07.007

• Photocatalyst
• Visible-light
• Hole-transport
• Fe2WO6
• Fe2WO6/TiO2

Fe2WO6 nanocrystal with an average size of similar to 300 nm was prepared by solid-state reaction between Fe2O3 and WO3 at 950 degrees C. The coupled structure of Fe2WO6/TiO2 was then fabricated by covering the Fe2WO6 surface with polycrystalline TiO2 by sol-gel process. Under visible-light irradiation, the Fe2WO6/TiO2 exhibits remarkable photocatalytic activity in decomposing gaseous 2-propanol and aqueous salicylic acid which is comparable to that of typical nitrogen-doped TiO2. It is deduced that its high catalytic activity originates from the hole-transfer from Fe2WO6 to TiO2. Evidences for the hole-transport were provided by monitoring the hole-scavenging reactions, employing iodide (I-) and 1,4-terephthalic acid (TA), respectively.

• 出版日期2014-11-5