Dongxue Han
Chinese Academy of Sciences, China.
Title: The New Photoelectric Materials for Analytical Applications
Biography
Biography: Dongxue Han
Abstract
Photoelectrochemical technique has attracted tremendous attentions since it combined merits of both optical and electrochemical methods, which has been applied as efficient strategy to develop DNA sensor, cytosensing, enzymatic analysis, immunoassay and many other small molecules sensing etc. The mechanism of photoelectrochemical sensor is based on reductive property of photoelectron or oxidative capacity of photo-generated hole. Howbeit, efficient and stable photocatalyst that are capable of harvesting visible light for an optimized use of solar energy are still very prerequisite. In order to best facilitate the specific analytical system, in our group, through theoretical simulations with calculation of the binding energies, a variety of semiconductor and composite materials have been designed and optimized including silver halide series of composites (AgBr/g-C3N4/N-graphene, AgCl/Ag nanocrystles, Ag@AgCl/BiVO4, AgX/graphene aerogels, AgClxBr1-x, Ag@AgBr/SO3H-Graphene, etc.), series of doped & hybrid TiO2 composites (ug-C3N4/TiO2, GO/TiO2, SO3H-Graphene/TiO2, Ce-S-TiO2/SO3H-graphene, polyaniline-graphene/TiO2, etc.) and other semiconductors (V doped BiMoO4, Pd/SnO2/graphene, etc.) It reveals that such photoelectrochemical technique is considered to be an ideal platform for water quality monitoring & purification, global antioxidant capacity assessment, o-diphenol discrimination, carbon dioxide reduction and other applications1-5. It is anticipated that the photoelectrochemical technique will open up new insights into the architectural design of novel photocatalysts with high photoactivity and further utilizations in the environmental, food and energy field.