Journal
SOLID STATE SCIENCES
Volume 80, Issue -, Pages 116-122Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solidstatesciences.2018.03.011
Keywords
TiO2 nanotube; Ag(CH3NH2)(2)(+); Ag(NH3)(2)(+); Ag+; Photocatalytic activity
Funding
- National Natural Science Foundation of China [51372234, 21301187]
- China Postdoctoral Science Foundation [2015M582132, 2016T90652]
- Qingdao Science and Technology Plan [15-9-1-60-jch]
- Fundamental Research Funds for the Central Universities [201564001]
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In this paper, Ag(CH3NH2)(2)(+), Ag(NH3)(2)(+) and Ag+ with different radii have been used as silver sources to find out the distribution of Ag ions on the H-TNT surface, which is critical to the final performance. The influence of this distribution on visible photocatalytic activity is further studied. The results indicate that, when Ag+ used as silver source with low concentration, these small sized silver ions mainly distribute on interlayer spacing of H-TNT. After heat-treatment and photo-reduction, the generated silver nanoparticles uniformly embed in the anatase TiO2 nanotube walls, and bring large interfacial area between Ag particles and TiO(2 )nanotubes. The separation effect of photogenerated electron-hole pair in TiO2 is enhanced by Ag particles, and achieves the best at 0.15 g/L, much higher than P25, TiO2/0, Ag-N@TiO(2 )and Ag-C-N@TiO2 . This paper provides new ideas for the modification of TiO2 nanotubes. (C) 2018 Published by Elsevier Masson SAS.
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