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LIU Guo-yang, LI Ke-ke, JIA Jia, ZHANG Ya-ting. Coal-based graphene as a promoter of TiO2 for photocatalytic degradation of organic dyes[J]. NEW CARBOM MATERIALS. doi: 10.1016/S1872-5805(21)60018-5
Citation: LIU Guo-yang, LI Ke-ke, JIA Jia, ZHANG Ya-ting. Coal-based graphene as a promoter of TiO2 for photocatalytic degradation of organic dyes[J]. NEW CARBOM MATERIALS. doi: 10.1016/S1872-5805(21)60018-5

Coal-based graphene as a promoter of TiO2 for photocatalytic degradation of organic dyes

doi: 10.1016/S1872-5805(21)60018-5
Funds:  This work was kindly supported by Open Fund Project of National Engineering Research Center of Coal Preparation and Purification (2018NERCCPP-B06), National Natural Science Foundation of China-Coal based low carbon joint Foundation of Shanxi Province (U1810113) and Natural Science Foundation of Shaanxi Province (2019JLP-12)
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  • Author Bio:

    LIU Guo-yang, Ph.D, Lecture. E-mail: liuguoyangxust@126.com

  • Corresponding author: ZHANG Ya-ting, Ph.D, Professor. E-mail:isyating@163.com
  • Received Date: 2021-01-01
  • Rev Recd Date: 2021-01-01
  • Available Online: 2021-02-05
  • A reduced graphene oxide (H-rGO)/TiO2–composite (H-TiO2@rGO) as a catalyst for photocatalytic degradation of rhodamine B (Rh B) and methyl orange (MO) was prepared by hydrothermal treating a dispersant of TiO2 nanoparticles with sizes of 5-10 nm and GO obtained by the Hummers method from coal-based graphite in water. Compared with the M-TiO2@GO and M-TiO2@rGO composites by a wet mixing method, results indicated that the TiO2 nanoparticles in H-TiO2@rGO were uniformly decorated on both sides of rGO sheet, forming a stacked-sheet structure while apparent aggregation of TiO2 nanoparticles was found in both M-TiO2@GO and M-TiO2@rGO. Therefore, H-rGO@TiO2 had the highest catalytic activity towards degradation of Rh B and MO under visible light irradiation among the three, where the incorporation of rGO into TiO2 helps to narrow the band gap of TiO2, inhibit the recombination rate of electron–hole pairs and provide conductive networks for electron transfer.
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