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

ABSTRACT: 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.

SUBMITTER: Yamagami M 

PROVIDER: S-EPMC9654061 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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Hot Electron Extraction in SWCNT/TiO<sub>2</sub> for Photocatalytic H<sub>2</sub> Evolution from Water.

Yamagami Masahiro M   Tajima Tomoyuki T   Zhang Zihao Z   Kano Jun J   Yashima Ki-Ichi KI   Matsubayashi Takana T   Nguyen Huyen Khanh HK   Nishiyama Naoto N   Hayashi Tomoya T   Takaguchi Yutaka Y  

Nanomaterials (Basel, Switzerland) 20221029 21

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)  ...[more]

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