Abstract
SrTiO3 nanoparticles modified with a carboxyl group were successfully prepared by microwave-assisted solvothermal reaction of SrCl2·6H2O and Ti(OC3H7)4 in methanol–organic acid solution. The as-prepared products were characterized using X-ray diffraction (XRD), diffuse reflectance spectroscopy, and Fourier-transform infrared (FTIR) spectroscopy. The photocatalytic activity was determined by DeNO x ability using a mercury arc with filters to control irradiation wavelengths to >290, >400, and >510 nm. Nanoparticles of perovskite-type SrTiO3 were successfully synthesized above pH 12. The photocatalytic activity of SrTiO3 under visible-light (>510 nm) irradiation could be promoted by surface modification of SrTiO3 with the carboxyl group (–COO), especially from oleic acid.
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Acknowledgments
This research was supported in part by Management Expenses Grants for National Universities Corporations from the Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT). The authors also thank the International Sci. & Tech. Co-operation Foundation of Gansu Provincial, China for support (Grant No. 090WCGA903).
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Li, H., Yin, S., Wang, Y. et al. Effect of carboxyl group on the visible-light photocatalytic activity of SrTiO3 nanoparticles. Res Chem Intermed 39, 1615–1621 (2013). https://doi.org/10.1007/s11164-012-0894-1
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DOI: https://doi.org/10.1007/s11164-012-0894-1