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Yamagami M, Tajima T, Zhang Z, Kano J, Yashima KI, Matsubayashi T, Nguyen HK, Nishiyama N, Hayashi T, Takaguchi Y. Hot Electron Extraction in SWCNT/TiO 2 for Photocatalytic H 2 Evolution from Water. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3826. [PMID: 36364601 PMCID: PMC9654061 DOI: 10.3390/nano12213826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 10/24/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
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.
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Affiliation(s)
- Masahiro Yamagami
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Tomoyuki Tajima
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Zihao Zhang
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Jun Kano
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Ki-ichi Yashima
- Department of Material Design and Engineering, Faculty of Sustainable Design, University of Toyama, Toyama 930-8555, Japan
| | - Takana Matsubayashi
- Department of Material Design and Engineering, Faculty of Sustainable Design, University of Toyama, Toyama 930-8555, Japan
| | - Huyen Khanh Nguyen
- Department of Material Design and Engineering, Faculty of Sustainable Design, University of Toyama, Toyama 930-8555, Japan
| | - Naoto Nishiyama
- Department of Material Design and Engineering, Faculty of Sustainable Design, University of Toyama, Toyama 930-8555, Japan
| | - Tomoya Hayashi
- Department of Material Design and Engineering, Faculty of Sustainable Design, University of Toyama, Toyama 930-8555, Japan
| | - Yutaka Takaguchi
- Department of Material Design and Engineering, Faculty of Sustainable Design, University of Toyama, Toyama 930-8555, Japan
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Tajima T, Okabe S, Takaguchi Y. Photoinduced Electron Transfer in a MoS 2/Anthracene Mixed-Dimensional Heterojunction in Aqueous Media. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Tomoyuki Tajima
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Shogo Okabe
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Yutaka Takaguchi
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
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Izawa T, Kalousek V, Miyamoto D, Murakami N, Miyake H, Tajima T, Kurashige W, Negishi Y, Ikeue K, Ohkubo T, Takaguchi Y. Carbon-nanotube-based Photocatalysts for Water Splitting in Cooperation with BiVO 4 and [Co(bpy) 3] 3+/2+. CHEM LETT 2019. [DOI: 10.1246/cl.180999] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takumi Izawa
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Vit Kalousek
- Advanced Materials Research Institute, Sanyo-onoda City University, 1-1-1 Daigakudori, Sanyo-Onoda, Yamaguchi 756-0884, Japan
| | - Daiki Miyamoto
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Noritake Murakami
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Hideaki Miyake
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Tomoyuki Tajima
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Wataru Kurashige
- Department of Applied Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Yuichi Negishi
- Department of Applied Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Keita Ikeue
- Department of Applied Chemistry, Faculty of Engineering, Sanyo-onoda City University, 1-1-1 Daigakudori, Sanyo-Onoda, Yamaguchi 756-0884, Japan
| | - Takahiro Ohkubo
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Yutaka Takaguchi
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
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Takaguchi Y, Miyake H, Izawa T, Miyamoto D, Sagawa R, Tajima T. Molecular design of benzothiadiazole-based dyes for working with carbon nanotube photocatalysts. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2019.1603716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Yutaka Takaguchi
- Graduate School of Environmental Science & Technology, Okayama University, Okayama, Japan
| | - Hideaki Miyake
- Graduate School of Sciences & Technology for Innovation, Yamaguchi University, Ube, Japan
| | - Takumi Izawa
- Graduate School of Environmental Science & Technology, Okayama University, Okayama, Japan
| | - Daiki Miyamoto
- Graduate School of Environmental Science & Technology, Okayama University, Okayama, Japan
| | - Ryohei Sagawa
- Graduate School of Environmental Science & Technology, Okayama University, Okayama, Japan
| | - Tomoyuki Tajima
- Graduate School of Environmental Science & Technology, Okayama University, Okayama, Japan
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Yamagami M, Tajima T, Ishimoto K, Miyake H, Michiue H, Takaguchi Y. Physical modification of carbon nanotubes with a dendrimer bearing terminal mercaptoundecahydrododecaborates (Na
2
B
12
H
11
S). HETEROATOM CHEMISTRY 2018. [DOI: 10.1002/hc.21467] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Masahiro Yamagami
- Graduate School of Environmental and Life ScienceOkayama University Okayama Japan
| | - Tomoyuki Tajima
- Graduate School of Environmental and Life ScienceOkayama University Okayama Japan
| | - Kango Ishimoto
- Graduate School of Environmental and Life ScienceOkayama University Okayama Japan
| | - Hideaki Miyake
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yamaguchi Japan
| | | | - Yutaka Takaguchi
- Graduate School of Environmental and Life ScienceOkayama University Okayama Japan
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Ishimoto K, Tajima T, Miyake H, Yamagami M, Kurashige W, Negishi Y, Takaguchi Y. Photo-induced H 2 evolution from water via the dissociation of excitons in water-dispersible single-walled carbon nanotube sensitizers. Chem Commun (Camb) 2018; 54:393-396. [PMID: 29250643 DOI: 10.1039/c7cc07194a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To observe a clear-cut example of the formation of mobile carriers from excitons on semiconducting single-walled carbon nanotubes (s-SWCNTs) surrounded by a medium with a high dielectric constant, water-dispersible s-SWCNT nanocomposites were fabricated by physical modifications using poly(amidoamine) dendrimers that contain an aliphatic core. The evolution of H2 from water using these s-SWCNT/dendrimer nanocomposites as photosensitizers under irradiation with visible light demonstrated a photo-induced electron transfer from the s-SWCNTs to the co-catalysts.
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Affiliation(s)
- Kango Ishimoto
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan.
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