Effect of Fe Loading Condition and Reductants on CO 2 Reduction Performance with Fe/TiO 2 Photocatalyst

Fe-doped TiO 2 (Fe/TiO 2 ) film photocatalyst was prepared by sol-gel and dip-coating process and pulse arc plasma method. The effect of pulse number on the CO 2 reduction performance with the Fe/TiO 2 was investigated in this study. In addition, the effect of reductants such as H 2 O, H 2 , and NH 3 /H 2 O on the CO 2 reduction performance with the Fe/TiO 2 photocatalyst was also investigated. The characteristics of the prepared Fe/TiO 2 film coated on a netlike glass fiber which is a base material were analyzed by SEM, EPMA, EDX, and EPMA. Furthermore, the CO 2 reduction performance of the Fe/TiO 2 film was tested under a Xe lamp with or without ultraviolet (UV) light. The results show that the CO 2 reduction performance with the pulse number of 100 is the best with H 2 O and/or H 2 as reductant under UV light illumination, while that with the pulse number of 500 is the best when NH 3 /H 2 O is used as reductant. On the other hand, the CO 2 reduction performance with the pulse number of 500 is the best under every reductant condition without UV light illumination. The highest CO 2 reduction performance with the Fe/TiO 2 is obtained under H 2 + H 2 O/CO 2 condition, and the best moral ratio of total reductants to CO 2 is 1.5 : 1.