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Yanagisawa R, Ueda T, Nakamoto KI, Lu Z, Onishi H, Minato T. The interface between ice and alcohols analyzed by atomic force microscopy. J Chem Phys 2024; 161:024702. [PMID: 38980093 DOI: 10.1063/5.0211501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Accepted: 05/28/2024] [Indexed: 07/10/2024] Open
Abstract
This study investigates the interface between ice and organic solvents using atomic force microscopy (AFM). Atomically flat ice surfaces were prepared and observed by AFM in 1-octanol, 1-hexanol, and 1-butanol. The results show differences in surface roughness influenced by the interaction of ice and alcohols. Young's modulus of ice was analyzed by force curve measurements, providing valuable insights into the properties of ice in liquid environments. The results showed the characteristics of the ice surface in different solvents, suggesting potential applications in understanding surface and interface phenomena associated with ice under realistic conditions.
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Affiliation(s)
- Ryo Yanagisawa
- Department of Chemistry, School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Tadashi Ueda
- Institute for Molecular Science, National Institutes of Natural Sciences, Nishigonaka 38, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan
| | - Kei-Ichi Nakamoto
- Institute for Molecular Science, National Institutes of Natural Sciences, Nishigonaka 38, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan
| | - Zhengxi Lu
- Department of Chemistry, School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Hiroshi Onishi
- Department of Chemistry, School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
- Institute for Molecular Science, National Institutes of Natural Sciences, Nishigonaka 38, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan
| | - Taketoshi Minato
- Institute for Molecular Science, National Institutes of Natural Sciences, Nishigonaka 38, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan
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Chon B, Lee HJ, Kang Y, Kim HW, Kim CH, Son HJ. Investigation of Interface Characteristics and Physisorption Mechanism in Quantum Dots/TiO 2 Composite for Efficient and Sustainable Photoinduced Interfacial Electron Transfer. ACS APPLIED MATERIALS & INTERFACES 2024; 16:9414-9427. [PMID: 38334708 DOI: 10.1021/acsami.3c16086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Owing to their superior stability compared to those of conventional molecular dyes, as well as their high UV-visible absorption capacity, which can be tuned to cover the majority of the solar spectrum through size adjustment, quantum dot (QD)/TiO2 composites are being actively investigated as photosensitizing components for diverse solar energy conversion systems. However, the conversion efficiencies and durabilities of QD/TiO2-based solar cells and photocatalytic systems are still inferior to those of conventional systems that employ organic/inorganic components as photosensitizers. This is because of the poor adsorption of QDs onto the TiO2 surface, resulting in insufficient interfacial interactions between the two. The mechanism underlying QD adsorption on the TiO2 surface and its relationship to the photosensitization process remain unclear. In this study, we established that the surface characteristics of the TiO2 semiconductor and the QDs (i.e., surface defects of the metal oxide and the surface structure of the QD core) directly affect the QD adsorption capacity by TiO2 and the interfacial interactions between the QDs and TiO2, which relates to the photosensitization process from the photoexcited QDs to TiO2 (QD* → TiO2). The interfacial interaction between the QDs and TiO2 is maximized when the shape/thickness-modulated triangular QDs are composited with defect-rich anatase TiO2. Comprehensive investigations through photodynamic analyses and surface evaluation using X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and photocatalysis experiments collectively validate that tuning the surface properties of QDs and modulating the TiO2 defect concentration can synergistically amplify the interfacial interaction between the QDs and TiO2. This augmentation markedly improved the efficiency of photoinduced electron transfer from the photoexcited QDs to TiO2, resulting in significantly increased photocatalytic activity of the QD/TiO2 composite. This study provides the first in-depth characterization of the physical adhesion of QDs dispersed on a heterogeneous metal-oxide surface. Furthermore, the prepared QD/TiO2 composite exhibits exceptional adsorption stability, resisting QD detachment from the TiO2 surface over a wide pH range (pH = 2-12) in aqueous media as well as in nonaqueous solvents during two months of immersion. These findings can aid the development of practical QD-sensitized solar energy conversion systems that require the long-term stability of the photosensitizing unit.
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Affiliation(s)
- Bumsoo Chon
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Republic of Korea
| | - Hyung Joo Lee
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Republic of Korea
| | - Yun Kang
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Hyun Woo Kim
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Chul Hoon Kim
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Republic of Korea
| | - Ho-Jin Son
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Republic of Korea
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Li YB, Si R, Wen B, Wei XL, Seriani N, Yin WJ, Gebauer R. The Role of Water Molecules on Polaron Behavior at Rutile (110) Surface: A Constrained Density Functional Theory Study. J Phys Chem Lett 2024; 15:1019-1027. [PMID: 38253014 DOI: 10.1021/acs.jpclett.3c02855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Understanding the behavior of a polaron in contact with water is of significant importance for many photocatalytic applications. We investigated the influence of water on the localization and transport properties of polarons at the rutile (110) surface by constrained density functional theory. An excess electron at a dry surface favors the formation of a small polaron at the subsurface Ti site, with a preferred transport direction along the [001] axis. As the surface is covered by water, the preferred spatial localization of the polarons is moved from the subsurface to the surface. When the water coverage exceeds half a monolayer, the preferred direction of polaron hopping is changed to the [110] direction toward the surface. This characteristic behavior is related to the Ti3d-orbital occupations and crystal field splitting induced by different distorted structures under water coverage. Our work describes the reduced sites that might eventually play a role in photocatalysis for rutile (110) surfaces in a water environment.
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Affiliation(s)
- Yun-Bo Li
- School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201, China
- Key Laboratory of Intelligent Sensors and Advanced Sensing Materials of Hunan Province, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Rutong Si
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, I-34151 Trieste, Italy
| | - Bo Wen
- School of Physics and Electronics, Henan University, Kaifeng 475001, China
| | - Xiao-Lin Wei
- Department of Physics and Laboratory for Quantum Engineering and Micro-Nano Energy Technology, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Nicola Seriani
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, I-34151 Trieste, Italy
| | - Wen-Jin Yin
- School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201, China
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, I-34151 Trieste, Italy
- Key Laboratory of Intelligent Sensors and Advanced Sensing Materials of Hunan Province, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Ralph Gebauer
- The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, I-34151 Trieste, Italy
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4
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Atomic structures and electronic properties of Cr-doped ZnO( ) surfaces. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63710-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mino L, Signorile M, Crocellà V, Lamberti C. Ti-Based Catalysts and Photocatalysts: Characterization and Modeling. CHEM REC 2018; 19:1319-1336. [PMID: 30570210 DOI: 10.1002/tcr.201800108] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 11/14/2018] [Indexed: 11/09/2022]
Abstract
This perspective article aims to underline how cutting-edge synchrotron radiation spectroscopies such as extended X-ray absorption spectroscopy (EXAFS), X-ray absorption near edge structure (XANES), high resolution fluorescence detected (HRFD) XANES, X-ray emission spectroscopy (XES) and resonant inelastic X-ray scattering (RIXS) have played a key role in the structural and electronic characterization of Ti-based catalysts and photocatalysts, representing an important additional value to the outcomes of conventional laboratory spectroscopies (UV-Vis, IR, Raman, EPR, NMR etc.). Selected examples are taken from the authors research activity in the last two decades, covering both band-gap and shape engineered TiO2 materials and microporous titanosilicates (ETS-10, TS-1 and Ti-AlPO-5). The relevance of the state of the art simulation techniques as a support for experiments interpretation is underlined for all the reported examples.
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Affiliation(s)
- Lorenzo Mino
- Department of Chemistry, INSTM Reference Center and NIS Interdepartmental Center, University of Turin, via Giuria 7, I-10135, Turin, Italy
| | - Matteo Signorile
- Department of Chemistry, INSTM Reference Center and NIS Interdepartmental Center, University of Turin, via Giuria 7, I-10135, Turin, Italy
| | - Valentina Crocellà
- Department of Chemistry, INSTM Reference Center and NIS Interdepartmental Center, University of Turin, via Giuria 7, I-10135, Turin, Italy
| | - Carlo Lamberti
- Department of Physics, INSTM Reference Center and CrisDi Interdepartmental Center for crystallography, University of Turin, via Giuria 1, I-10135, Turin, Italy.,The Smart Materials Research Institute, Southern Federal University, Sladkova Street 174/28, 344090, Rostov-on-Don, Russia
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Martín-García I, Alonso F. Synthesis of Dihydroindoloisoquinolines through Copper-Catalyzed Cross-Dehydrogenative Coupling of Tetrahydroisoquinolines and Nitroalkanes. Chemistry 2018; 24:18857-18862. [DOI: 10.1002/chem.201805137] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Indexed: 01/17/2023]
Affiliation(s)
- Iris Martín-García
- Instituto de Síntesis Orgánica (ISO) and Departamento de Química Orgánica; Facultad de Ciencias; Universidad de Alicante; Apdo. 99 03080 Alicante Spain
| | - Francisco Alonso
- Instituto de Síntesis Orgánica (ISO) and Departamento de Química Orgánica; Facultad de Ciencias; Universidad de Alicante; Apdo. 99 03080 Alicante Spain
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Minato T, Araki Y, Umeda K, Yamanaka T, Okazaki KI, Onishi H, Abe T, Ogumi Z. Interface structure between tetraglyme and graphite. J Chem Phys 2017; 147:124701. [DOI: 10.1063/1.4996226] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Taketoshi Minato
- Office of Society-Academia Collaboration for Innovation, Kyoto University, Katsura, Nishikyo, Kyoto 615-8510,
Japan
| | - Yuki Araki
- Department of Chemistry, School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
- Department of Electronic Science and Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8510,
Japan
| | - Kenichi Umeda
- Department of Advanced Material Science, The University of Tokyo, Kashiwa, Chiba 277-8561,
Japan
| | - Toshiro Yamanaka
- Office of Society-Academia Collaboration for Innovation, Kyoto University, Katsura, Nishikyo, Kyoto 615-8510,
Japan
| | - Ken-ichi Okazaki
- Office of Society-Academia Collaboration for Innovation, Kyoto University, Uji, Kyoto 611-0011,
Japan
| | - Hiroshi Onishi
- Department of Chemistry, School of Science, Kobe University, Nada-ku, Kobe 657-8501, Japan
| | - Takeshi Abe
- Graduate School of Global Environmental Studies, Kyoto University, Katsura, Nishikyo, Kyoto 615-8510,
Japan
| | - Zempachi Ogumi
- Office of Society-Academia Collaboration for Innovation, Kyoto University, Uji, Kyoto 611-0011,
Japan
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Fukutani K, Wilde M, Ogura S. Nuclear Dynamics and Electronic Effects of Hydrogen on Solid Surfaces. CHEM REC 2016; 17:233-249. [DOI: 10.1002/tcr.201600077] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Indexed: 11/06/2022]
Affiliation(s)
- K. Fukutani
- Institute of Industrial Science; The University of Tokyo, Komaba, Meguro-ku; Tokyo 153-8505 Japan
| | - M. Wilde
- Institute of Industrial Science; The University of Tokyo, Komaba, Meguro-ku; Tokyo 153-8505 Japan
| | - S. Ogura
- Institute of Industrial Science; The University of Tokyo, Komaba, Meguro-ku; Tokyo 153-8505 Japan
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Minato T, Kajita S, Pang CL, Asao N, Yamamoto Y, Nakayama T, Kawai M, Kim Y. Tunneling Desorption of Single Hydrogen on the Surface of Titanium Dioxide. ACS NANO 2015; 9:6837-6842. [PMID: 26158720 DOI: 10.1021/acsnano.5b01607] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We investigated the reaction mechanism of the desorption of single hydrogen from a titanium dioxide surface excited by the tip of a scanning tunneling microscope (STM). Analysis of the desorption yield, in combination with theoretical calculations, indicates the crucial role played by the applied electric field. Instead of facilitating desorption by reducing the barrier height, the applied electric field causes a reduction in the barrier width, which, when coupled with the electron excitation induced by the STM tip, leads to the tunneling desorption of the hydrogen. A significant reduction in the desorption yield was observed when deuterium was used instead of hydrogen, providing further support for the tunneling-desorption mechanism.
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Affiliation(s)
- Taketoshi Minato
- †International Advanced Research and Education Organization, Tohoku University, Sendai 980-8578, Japan
- ‡Surface and Interface Science Laboratory, RIKEN, 2-1 Hirosawa, Saitama 351-0198, Japan
| | - Seiji Kajita
- §Department of Physics, Chiba University, 1-33 Yayoi, Inage, Chiba 263-0022, Japan
| | - Chi-Lun Pang
- ∥Department of Chemistry, University College London, London WC1H 0AJ, United Kingdom
| | - Naoki Asao
- ⊥WPI Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan
| | - Yoshinori Yamamoto
- ⊥WPI Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan
| | - Takashi Nakayama
- §Department of Physics, Chiba University, 1-33 Yayoi, Inage, Chiba 263-0022, Japan
| | - Maki Kawai
- #Department of Advanced Materials Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Yousoo Kim
- ‡Surface and Interface Science Laboratory, RIKEN, 2-1 Hirosawa, Saitama 351-0198, Japan
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