Impact of Overlapping Fe/TiO2 Prepared by Sol-Gel and Dip-Coating Process on CO2 Reduction
Impact of Overlapping Fe/TiO2 Prepared by Sol-Gel and Dip-Coating Process on CO2 Reduction
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DOI：
10.1155/2016/2392581
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发表时间：
2016-06
影响因子：
3.2
通讯作者：
A. Nishimura;Xu-Hui Zhao;Takuya Hayakawa;Noriaki Ishida;M. Hirota;E. Hu
中科院分区：
文献类型：
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作者：
A. Nishimura;Xu-Hui Zhao;Takuya Hayakawa;Noriaki Ishida;M. Hirota;E. Hu
采用溶胶-凝胶法和浸渍提拉法制备了Fe掺杂的TiO2光催化剂(Fe/TiO2光催化剂)，将其光响应性扩展到可见光范围。为了提高光催化剂的CO_2还原性能，研究了网状玻璃纤维和铜盘作为包覆Fe/TiO2光催化剂的基材。利用扫描电子显微镜和电子探针对在网状玻璃纤维和铜盘上制备的Fe/TiO2膜进行了表征。此外，在氙灯下分别测试了网状玻璃盘、铜盘及其重叠层上的Fe/TiO2薄膜在紫外光和紫外光下的二氧化碳还原性能。结果表明，在紫外光照射和无紫外光照射条件下，无论使用何种基材，Fe掺杂都会增加产生的CO的浓度。由于促进了两重叠层光催化剂之间的电子转移，在紫外光照射下，Fe/TiO2双重叠层的CO峰浓度约为Fe/TiO2单重叠层的1.5倍，而在无紫外光照射的条件下，促进比约为1.1倍。
Fe-doped TiO2 (Fe/TiO2) film photocatalyst was prepared by sol-gel and dip-coating process to extend its photoresponsivity to the visible spectrum. To promote the CO2 reduction performance with the photocatalyst, some types of base materials used for coating Fe/TiO2, which were netlike glass fiber and Cu disc, were investigated. The characterization of prepared Fe/TiO2 film coated on netlike glass fiber and Cu disc was analyzed by SEM and EPMA. In addition, the CO2 reduction performance of Fe/TiO2 film coated on netlike glass disc, Cu disc, and their overlap was tested under a Xe lamp with or without ultraviolet (UV) light, respectively. The results show that the concentration of produced CO increases by Fe doping irrespective of base material used under the illumination condition with UV light as well as that without UV light. Since the electron transfer between two overlapped photocatalysts is promoted, the peak concentration of CO for the Fe/TiO2 double overlapping is approximately 1.5 times as large as the Fe/TiO2 single overlapping under the illumination condition with UV light, while the promotion ratio is approximately 1.1 times under that without UV light.