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                          今天是:

                          陈士夫老师课题组在Journal of Catalysis杂志发表论文-2018.1.17

                          论文名称:Simultaneous dehydrogenation and hydrogenolysis of aromatic alcohols in one reaction system via visible-light-driven heterogeneous photocatalysis

                          作者:SugangMeng*a, XiaofengNinga, SushengChanga, XianliangFua, XiangjuYeb and Shifu Chen*ab

                          单位:aHuaibei Normal University,b Anhui Science and Technology University.

                          摘要:Photocatalytic selective organic transformation has attracted worldwide interest by using of photoexcited holes and electrons. Although extensive studies have made significant progress in dehydrogenation of alcohols, hydrogenolysis of alcohols directly using photoexcited electrons constitutes a challenge. Herein, photocatalytic selective dehydrogenation and hydrogenolysis of aromatic alcohols into corresponding alkanes/ethers and aldehydes has been achieved by direct use of photoexcited electrons and holes over CdS in one reaction system under visible light irradiation. Compared with other popular visible-light-driven photocatalysts Sb2S3, Bi2O3, N-doped TiO2, Zn3In2S6, g-C3N4 and Ce2S3, the sum of the yields of alkanes and aldehydes over the as-prepared CdScould reach up to 94% after reaction for 4 h. The high photoactivity and stability of CdS toward dehydrogenation and hydrogenolysis of aromatic alcohols can be ascribed to its appropriate band potentials and effective charge separation-transportation. Theoptimum positions are thatthe valence band position should be located between oxidation potentials of alcohol/aldehyde and aldehyde/oxidized aldehyde, and the conduction band position should be more slightly negative than reduction potential of alkane /alcohol. During this reaction, dehydrogenationreaction consumes two holes and produces two protons; hydrogenolysis process depletes two electrons and two protons. Therefore, a cooperative, cycle and efficient reaction system was established.

                          Graphical abstract:

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                          影响因子:6.844

                          分区情况:SCI一区

                          论文链接:http://www.sciencedirect.com/science/article/pii/S0021951717304050

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