Mrach 06 | Virtual Event
Dongping Duan
Chinese Academy of Sciences, China
Dr. Dongping Duan is a distinguished researcher affiliated with the Institute of Process Engineering at the Chinese Academy of Sciences, China. With expertise in materials science and engineering, Dr. Duan has made significant contributions to the field of semiconductor photocatalysis, particularly focusing on the synthesis and characterization of SrTiO3-based materials. Throughout his career spanning over a decade, Dr. Duan has led a pioneering research team in exploring various synthesis methods, including hydrothermal, molten salt, ion doping, and surface modification techniques, to develop advanced SrTiO3 photocatalytic materials. Notably, his team’s groundbreaking work includes the synthesis of novel morphologies such as polyhedral SrTiO3 and hollow-cage SrTiO3, along with innovative composite materials incorporating quantum dots.
The cubic SrTiO3 is a well-known perovskite semi-conductor as the excellent dielectric and piezoelectric properties. However, due to the band gap width of 3.2 eV, it has only shown excellent photocatalytic performance under the ultraviolet light band. Based on the decade of research, using the methods of hydrothermal, molten salt, ions doping, and surface modification, the research team led by the author had synthesized various SrTiO3 photocatalytic materials including the polyhedral SrTiO3, hollow-cage SrTiO3, the related composite materials, and a unique composite of polyhedral SrTiO3 and quantum dots. Importantly, the innovative SrTiO3 with 26-facet and hollow cage morphology were first synthesized, which had never been reported before. Moreover, in aspects of crystal structure, thermal stability and chemical stability, the polyhedral SrTiO3 crystals showed distinguishing and excellent performances, as well as the carrier transport characteristics and photoelectric conversion capabilities verified by multiple experiments. Simultaneously, the author proposed a new excited state model of photo-induced carrier by studying the enhancement mechanism of the light absorption ability and the separation efficiency of photo-induced electron-hole pairs in polyhedral SrTiO3. And through regulation of crystal structure and the exposed crystal facets distribution effectively, polyhedral SrTiO3 had achieved multi-band light response. In summary, as new photocatalytic materials, we are convinced that the polyhedral SrTiO3 and the related composite materials have great potentials for future applications in photocatalysis and green energy fields.
