Hot Electron Extraction in SWCNT/TiO2 for Photocatalytic H2 Evolution from Water

Masahiro Yamagami, Tomoyuki Tajima, Zihao Zhang, Jun Kano, Ki Ichi Yashima, Takana Matsubayashi, Huyen Khanh Nguyen, Naoto Nishiyama, Tomoya Hayashi, Yutaka Takaguchi

Research output: Contribution to journalArticlepeer-review


Single-walled carbon nanotube (SWCNT)/TiO2 hybrids were synthesized using 1,10-bis(decyloxy)decane-core PAMAM dendrimer as a molecular glue. Upon photoirradiation of a water dispersion of SWCNT/TiO2 hybrids with visible light (λ > 422 nm), the hydrogen evolution reaction proceeded at a rate of 0.95 mmol/h·g in the presence of a sacrificial agent (1-benzyl-1,4-dihydronicotinamide, BNAH). External quantum yields (EQYs) of the hydrogen production reaction photosensitized by (6,5), (7,5), and (8,3) tubes were estimated to be 5.5%, 3.6%, and 2.2%, respectively, using monochromatic lights corresponding to their E22 absorptions (570 nm, 650 nm, and 680 nm). This order of EQYs (i.e., (6,5) > (7,5) > (8,3)SWCNTs) exhibited the dependence on the C2 energy level of SWCNT for EQY and proved the hot electron extraction pathway.

Original languageEnglish
Article number3826
Issue number21
Publication statusPublished - Nov 2022


  • hot electron extraction
  • hydrogen evolution
  • photocatalyst
  • single-walled carbon nanotube
  • water splitting

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)


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