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    Home > Important research progress of academician Tian He and Professor Hua Jianli of East China University of science and technology in the field of solar photolysis of water for hydrogen production

    Important research progress of academician Tian He and Professor Hua Jianli of East China University of science and technology in the field of solar photolysis of water for hydrogen production

    • Last Update: 2018-11-01
    • Source: Internet
    • Author: User
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    Recently, the international famous academic journal Advanced Functional Materials Online reported the important research progress of academician Tian He and Professor Hua Jianli in the field of solar photolysis water hydrogen production in the form of research papers The title of the paper is "molecular engineering of donor acceptorconverged polymer / G-C 3N 4 heterostuctures for signally enhanced hydraulic evolution under visible illumination" The corresponding authors of the paper are Professor Hua Jianli and Professor Gong Xueqing (DOI: 10.1002 / ADFM 201804512) of School of chemistry and molecular engineering of East China University of Technology Solar driven semiconductor photocatalytic hydrogen production is regarded as one of the ideal ways to solve the problems of clean energy preparation and environment At present, most of the photocatalysis materials are inorganic semiconductors, but these traditional photocatalysis materials have some problems, such as weak visible light response, harsh preparation conditions and shortage of resources Compared with inorganic semiconductor photocatalyst, organic semiconductor photocatalyst has many advantages, such as various synthesis methods, easy functional modification, energy band structure and easy electronic regulation, which makes it have great application potential in the field of photocatalytic hydrogen production Especially in recent years, organic conjugated polymer materials, due to the diversity of their synthesis methods and the wide selection of monomers, give organic conjugated polymer chemical structure and electronic properties easy to control, become a new type of organic photocatalysis materials, attracted a lot of research attention In addition, as a new organic semiconductor, graphite phase carbon nitride (g-c3n4) has excellent photoelectrochemical properties and is widely used in photocatalytic hydrogen production However, its weak ability to capture visible light and the shortcomings of easy surface electron hole recombination greatly limit its hydrogen production performance Therefore, how to effectively absorb light energy and realize the separation and utilization of photo generated carriers in g-c3n4 photocatalytic interface is one of the important challenges in the field of photoelectric interface chemistry On the basis of the research on improving the photocatalyst's photo capture ability, electron hole separation efficiency and hydrogen production performance by dye-sensitized semiconductor, Professor Hua Jianli's research group further proposed the molecular engineering strategy of organic conjugated polymer / g-c3n4 heterojunction to improve the hydrogen production performance of photolysis water In this work, three organic conjugated polymer semiconductor photocatalysts with different electron donors and benzothiadiazole receptor structural units were designed and synthesized By changing the electron donor group in the conjugated framework, the band gap of organic conjugated polymer was regulated, so as to improve the photocatalytic activity of organic polymer / g-c3n4 heterojunction The results show that the introduction of a strong electron donor (n-heteroperylene group) into the polymer conjugated framework can greatly reduce the energy gap bandwidth of the polymer and improve the effective absorption of visible light by the polymer heterojunction photocatalyst; at the same time, the type II heterojunction further promotes the separation of electron hole, making its apparent quantum yield (AQY) as high as 27.32% at 520 nm The highest AQY for hydrogen production was obtained by organic polymer / g-c3n4 heterojunction photocatalyst As an effective way to improve the photocatalytic performance of organic conjugated polymers, this work provides a huge potential design space and preparation strategy, and provides a new idea for the development of other types of highly efficient and stable polymer Semiconductor Photocatalysts (such as MOFs, COFS and ctfs) Under the guidance of Professor Hua Jianli and Professor Gong Xueqing, the research work was completed by Yu Fengtao and Wang Zhiqiang, Ph.D students Meanwhile, it was greatly supported and carefully guided by academician Tian He The research results were supported by NSFC, NSFC innovation research groups, special funds for basic scientific research business fees of Central Universities and 111 talent introduction program.
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