LI Yongli, ZHANG Zhipeng, WANG Jinshu, ZHOU Wenyuan, XU Xiangfeng, LUO Wei, ZHANG Nan. Atomically Dispersed Ag Supported TiO2 Mesoporous Nanobelts for Enhancement of Photocatalytic Oxidation Reactions[J]. Journal of Beijing University of Technology, 2020, 46(10): 1139-1148. DOI: 10.11936/bjutxb2020050005
    Citation: LI Yongli, ZHANG Zhipeng, WANG Jinshu, ZHOU Wenyuan, XU Xiangfeng, LUO Wei, ZHANG Nan. Atomically Dispersed Ag Supported TiO2 Mesoporous Nanobelts for Enhancement of Photocatalytic Oxidation Reactions[J]. Journal of Beijing University of Technology, 2020, 46(10): 1139-1148. DOI: 10.11936/bjutxb2020050005

    Atomically Dispersed Ag Supported TiO2 Mesoporous Nanobelts for Enhancement of Photocatalytic Oxidation Reactions

    • To investigate the effect of atomically dispersed Ag-loaded TiO2 mesoporous nanobelts on photocatalytic oxidation activity, Ag clusters-TiO2 nanobelts (NBs) were prepared through a facile process, including a mild reduction of Ag+ on the surface of TiO2 mesoporous nanobelts and a moderate heat treatment, which formed atomically dispersed Ag with strong metal-substrate interaction (MSI). The microstructure, light absorption, carrier separation and photocatalytic oxidation performance of prepared materials were investigated by XRD, STEM, UV-vis, PL, EXAFS and other techniques. Results show that Ag clusters-TiO2 NBs exhibit an excellent photocatalytic oxidation activity for gaseous pollutants under visible light irradiation. At low Ag loading (w=0.1%), the photodegradation efficiency of NO reaches 56.04%, and the removal rate of formaldehyde is 95.20%, which are 2.29 times and 1.22 times higher than that of Ag NPs-TiO2 NBs counterpart, respectively. TiO2 mesoporous nanobelts provide abundant anchor sites allowing Ag to disperse atomically, resulting in increased number of catalytically active sites. The strong interaction between Ag cluster and TiO2 and the reversible oxidation state of Ag cluster favor the activation of oxygen and the effective utilization of photogenerated carriers.
    • loading

    Catalog

      Turn off MathJax
      Article Contents

      /

      DownLoad:  Full-Size Img  PowerPoint
      Return
      Return