Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (3): 20210655.doi: 10.7503/cjcu20210655

• Physical Chemistry • Previous Articles     Next Articles

Photothermal Enhanced Photocatalytic Hydrogenation Performance of Au/RGO/Na2Ti3O7

MENG Xiangyu, ZHAN Qi, WU Yanan, MA Xiaoshuang, JIANG Jingyi, SUN Yueming(), DAI Yunqian()   

  1. School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China
  • Received:2021-09-10 Online:2022-03-10 Published:2021-10-13
  • Contact: SUN Yueming,DAI Yunqian E-mail:sun@seu.edu.cn;daiy@seu.edu.cn
  • Supported by:
    the National Nature Science Foundation of China(21975042);the Project of Six Talents Climax Foundation of Jiangsu, China(XCL-082);the Young Talent Lifting Project of Jiangsu Science and Technology Association, China

Abstract:

Typical photothermal plasmon graphene and nano gold were simply supported on sodium titanate(Na2Ti3O7). Thus, Au/RGO/Na2Ti3O7 photothermal-assisted photocatalytic system was constructed, featured with narrow bandgap and high photocatalytic activity. Graphene sheets and gold nanoparticles could generate a large number of hot-electron for activating reactants and reducing the reaction energy,through their local surface plasmon resonance effect under light. The photothermal effect can precisely raise the temperature near the reaction site, thus greatly improving the photocatalytic reaction rate. In addition, the Au/RGO/Na2Ti3O7 catalyst is endow with enhanced light-trapping performance by ably constructing special micro-branched structure. Also, the stability of catalyst was enhanced by confinement effects. Under the synergistic enhancement of photothermal effect and photocatalysis, Au/RGO/Na2Ti3O7 catalyst showed enhanced photocatalytic activity for the p-nitrophenol hydrogenation and cin-namaldehyde hydrogenation. The turnover frequency(TOF) of the p-nitrophenol reduction reaction catalyzed by the photothermal-assisted Au/RGO/Na2Ti3O7 was up to 54.4 min-1, and the activation energy barrier was significantly reduced to 15.78 kJ/mol. Moreover, it showed high stability in the long-term test(after 4 cycling test, the conversion retention rate was nearly 90%).

Key words: Photothermal effect, Photocatalysis, Hot-electron, Hydrogenation reduction

CLC Number: 

TrendMD: