杨泽群论文“Magnetic Rattle-Type Fe3O4@CuS Nanoparticles as Recyclable Sorbents for Mercury Capture from Coal Combustion Flue Gas”被Applied Nano Materials接收发表
发布时间：2018-08-10
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简介：Rattle-type Fe3O4@CuS synthesized using a two-step method was applied for elemental mercury (Hg0) adsorption in coal combustion flue gas for the first time. The Fe3O4 with strong magnetization was an ideal candidate as a core to make the sorbent recyclable, while the stabilized ultrathin CuS shell assured the Fe3O4@CuS had a higher Brunauer-Emmett-Teller (BET) surface area with more exposed active sites and stronger magnetization.A multistep reaction mechanism was proposed to explain the Hg0 adsorption over Fe3O4@CuS. At the first stage, polysulfide participated in Hg0 adsorption as the most active component and was consumed rapidly. After that, S-S dimers, sulfides, and even copper-terminated sites functioned as the adsorption centers. The as-formed mercury-copper (Hg-Cu) amalgam was transformed into mercury sulfide (HgS), a process that was dependent on the extent of the saturation of sulfide sites.
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