Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 256, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.117881
Keywords
Lewis base; [WO4](2-); Photocatalytic CO2 reduction; CO2 adsorption; TiO2
Funding
- National Key Research and Development Program of China [2017YFB0307900]
- Natural Science Foundation of Shandong Province, China [ZR2018BB042]
- National Natural Science Foundation of China [31670595,31770628]
- Taishan Scholars Program
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TiO2 is one of the most studied in photocatalytic CO2 filed, while its efficiency was seriously limited by the weak adsorption ability for CO2 and low separation efficiency of charge carriers. Here a lewis base [WO4](2-) was used to modify TiO2 via an in-situ ion exchange strategy. It was found that the prepared samples showed better performance in CO2 adsorption and carriers' separation. As a result, the TiO2 /[WO4](2-) composites had exhibited good activities in photocatalytic CO2 reduction. The amount of generated CO was over 19 times that of the pure TiO2 and it was even much better than precious metal (Ag, Au) modified TiO2. Our experiment proves that this kind of modifying Lewis base method is an efficient strategy for enhancing the CO2 reduction activity of semiconductor photocatalysts.
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