Abstract
Photocatalytic reduction of CO2 was carried out on villiform spherical catalysts of Pd-TiO2 in isopropanol solution. The catalysts were synthesized by hydrothermal method, their structures, morphologies and optical absorption properties were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and UV-vis absorption spectroscopy (UV-vis). The photocatalytic activities with different loading amounts and morphologies were evaluated for determining the dominant effect and optimizing the catalyst preparation. Based on a villiform spherical TiO2 with the largest specific surface area in our experiments, we prepared a set of catalysts with various loading amounts of palladium and tested them by bubbling CO2 through the slurry of catalyst and isopropanol. The highest formation rate of isopropyl formate was 276.6 μmol/g·cat/h. Eventually we proposed the reaction mechanism.
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Acknowledgements
We gratefully acknowledge financial support by the National Natural Science Foundation of China (NSFC) (No. 21176192 and 21776220), the Tianjin Natural Science Foundation (No. 12JCZDJC29400), and Training Project of Innovation Team of Colleges and Universities in Tianjin (No.TD13-5020).
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Funded by the National Natural Science Foundation of China (No. 21176192 and 21776220)
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Shao, X., Yin, X., Wang, B. et al. Hydrothermally Synthesizing Nanospheres of Pd Loaded TiO2 for Photocatalytically Reducing CO2 in Isopropanol to Isopropyl Formate. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 1046–1050 (2018). https://doi.org/10.1007/s11595-018-1932-7
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DOI: https://doi.org/10.1007/s11595-018-1932-7