Impact of Overlapping Fe/TiO2Prepared by Sol-Gel and Dip-Coating Process on CO2Reduction

Akira Nishimura,Noriaki Ishida,Eric Hu,Masafumi Hirota,Takuya Hayakawa,Xuyan Zhao

doi:10.1155/2016/2392581

Akira Nishimura, Noriaki Ishida + Show 4 more

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https://doi.org/10.1155/2016/2392581

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Abstract

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 CO2reduction 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/TiO2film coated on netlike glass fiber and Cu disc was analyzed by SEM and EPMA. In addition, the CO2reduction performance of Fe/TiO2film 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/TiO2double overlapping is approximately 1.5 times as large as the Fe/TiO2single overlapping under the illumination condition with UV light, while the promotion ratio is approximately 1.1 times under that without UV light.

Highlights

Due to mass consumption of fossil fuels, global warming and fossil fuels depletion have become serious global environmental problems in the world
The photocatalytic performance of Fe-doped TiO2 (Fe/TiO2) coated on netlike glass disc is lower than that on Cu disc
Fe/TiO2 coated on netlike glass disc is much larger than that for Fe/TiO2 coated on Cu disc as shown in Table 1, the CO2 reduction performance of Fe/TiO2 coated on netlike glass disc equals that on Cu disc, while that on netlike glass disc is lower than that on Cu disc under the illumination condition with UV light

Summary

Introduction

Due to mass consumption of fossil fuels, global warming and fossil fuels depletion have become serious global environmental problems in the world. TiO2 sol-gel and dip-coating process with doping is adopted in order to extend its photoresponsivity to the visible spectrum to promote the CO2 reduction performance. This process can incorporate dopants into TiO2 lattice, resulting in the better optical and catalytic properties [16]. Since the netlike glass fiber has a porous characteristic, it is believed that TiO2 film and doped metal are captured by netlike glass fiber during sol-gel and dip-coating process. The CO2 reduction characteristics of Fe/TiO2 coated on net glass fiber and/or Cu disc under the condition of illuminating Xe lamp with or without UV light were investigated

Experiment

Results and Discussion

Conclusions