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Zhang J, Li L, Li H. Adsorption-Controlled Wettability and Self-Cleaning of TiO 2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6188-6200. [PMID: 37073727 DOI: 10.1021/acs.langmuir.3c00324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Molecular adsorption on solids is inevitable and has significant influences on the wettability of materials, while the tuning mechanism of the wettability from molecular adsorption is yet to be understood. Using molecular dynamics (MD) simulations, we comprehensively studied the relation between the wettability of the TiO2 surface and the adsorption of water and carboxylic acid molecules. Our results reveal that the increasing amount of surface hydroxyl groups from the decomposition adsorption of H2O increases the hydrophilicity of TiO2, providing molecular-level evidence for the previously proposed mechanism of photo-induced hydrophilicity. By contrast, the surface wettability becomes tunable with water contact angles changing from 0 to ∼130° through length adjustment of the adsorbed carboxylic acids. The TiO2 surface is hydrophilic with the adsorption of short-alkyl-chain carboxylic acids (e.g., HCOOH) and becomes hydrophobic when longer-alkyl-chain carboxylic acids (H(CH2)nCOOH, n > 2) are present. Furthermore, long-alkyl-chain acids also increase surface oleophilicity, while the adsorption of HCOOH and CH3COOH significantly enhances the oleophobicity of TiO2. Water molecules can also more easily penetrate the space between oily contaminants and adsorbed short acid molecules, thereby further increasing its self-cleaning capacity. The present simulations not only reveal the mechanism of wettability caused by molecular adsorption but also provide a promising method to create materials with controllable wettability and high self-cleaning efficiency.
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Affiliation(s)
- Jingyan Zhang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemistry Technology, Beijing 100029, China
| | - Lei Li
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Hui Li
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemistry Technology, Beijing 100029, China
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Xue Q, Ng BKY, Man HW, Wu TS, Soo YL, Li MM, Kawaguchi S, Wong KY, Tsang SCE, Huang B, Lo TWB. Controlled synthesis of Bi- and tri-nuclear Cu-oxo nanoclusters on metal-organic frameworks and the structure-reactivity correlations. Chem Sci 2021; 13:50-58. [PMID: 35059150 PMCID: PMC8694280 DOI: 10.1039/d1sc05495c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 11/28/2021] [Indexed: 12/16/2022] Open
Abstract
Precisely tuning the nuclearity of supported metal nanoclusters is pivotal for designing more superior catalytic systems, but it remains practically challenging. By utilising the chemical and molecular specificity of UiO-66-NH2 (a Zr-based metal-organic framework), we report the controlled synthesis of supported bi- and trinuclear Cu-oxo nanoclusters on the Zr6O4 nodal centres of UiO-66-NH2. We revealed the interplay between the surface structures of the active sites, adsorption configurations, catalytic reactivities and associated reaction energetics of structurally related Cu-based 'single atoms' and bi- and trinuclear species over our model photocatalytic formic acid reforming reaction. This work will offer practical insight that fills the critical knowledge gap in the design and engineering of new-generation atomic and nanocluster catalysts. The precise control of the structure and surface sensitivities is important as it can effectively lead to more reactive and selective catalytic systems. The supported bi- and trinuclear Cu-oxo nanoclusters exhibit notably different catalytic properties compared with the mononuclear 'Cu1' analogue, which provides critical insight for the engineering of more superior catalytic systems.
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Affiliation(s)
- Qi Xue
- Department of Applied Biology and Chemical Technology, State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University Hong Kong China
- The Hong Kong Polytechnic University Shenzhen Research Institute, The Hong Kong Polytechnic University Shenzhen China
| | - Bryan Kit Yue Ng
- Department of Chemistry, Wolfson Catalysis Centre, University of Oxford Oxford OX1 3QR UK
| | - Ho Wing Man
- The Hong Kong Polytechnic University Shenzhen Research Institute, The Hong Kong Polytechnic University Shenzhen China
| | - Tai-Sing Wu
- National Synchrotron Radiation Research Center 101 Hsin-Ann Road Hsinchu 30076 Taiwan
| | - Yun-Liang Soo
- Department of Physics, National Tsing Hua University Hsinchu 30013 Taiwan
| | - Molly Mengjung Li
- Department of Applied Physics, The Hong Kong Polytechnic University Kowloon Hong Kong China
| | - Shogo Kawaguchi
- Japan Synchrotron Radiation Research Institute (JASRI), SPring-8 1-1-1 Kouto, Sayo-cho, Sayo-gun Hyogo 679-5198 Japan
| | - Kwok Yin Wong
- The Hong Kong Polytechnic University Shenzhen Research Institute, The Hong Kong Polytechnic University Shenzhen China
| | - Shik Chi Edman Tsang
- Department of Chemistry, Wolfson Catalysis Centre, University of Oxford Oxford OX1 3QR UK
| | - Bolong Huang
- Department of Applied Biology and Chemical Technology, State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University Hong Kong China
- The Hong Kong Polytechnic University Shenzhen Research Institute, The Hong Kong Polytechnic University Shenzhen China
| | - Tsz Woon Benedict Lo
- Department of Applied Biology and Chemical Technology, State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University Hong Kong China
- The Hong Kong Polytechnic University Shenzhen Research Institute, The Hong Kong Polytechnic University Shenzhen China
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Wang X, Yang J, Salla M, Xi S, Yang Y, Li M, Zhang F, Zhu M, Huang S, Huang S, Zhang Y, Wang Q. Redox‐Mediated Ambient Electrolytic Nitrogen Reduction for Hydrazine and Ammonia Generation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xun Wang
- Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117576 Singapore
| | - Jing Yang
- Institute of High Performance Computing A*STAR Singapore 138632 Singapore
| | - Manohar Salla
- Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117576 Singapore
| | - Shibo Xi
- Singapore Synchrotron Light Source National University of Singapore 5 Research Link Singapore 117603 Singapore
| | - Yi Yang
- Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117576 Singapore
| | - Mengsha Li
- Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117576 Singapore
| | - Feifei Zhang
- Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117576 Singapore
| | - Ming‐Ke Zhu
- Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117576 Singapore
| | - Songpeng Huang
- Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117576 Singapore
| | - Shiqiang Huang
- Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117576 Singapore
| | - Yong‐Wei Zhang
- Institute of High Performance Computing A*STAR Singapore 138632 Singapore
| | - Qing Wang
- Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117576 Singapore
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4
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Wang X, Yang J, Salla M, Xi S, Yang Y, Li M, Zhang F, Zhu MK, Huang S, Huang S, Zhang YW, Wang Q. Redox-Mediated Ambient Electrolytic Nitrogen Reduction for Hydrazine and Ammonia Generation. Angew Chem Int Ed Engl 2021; 60:18721-18727. [PMID: 34076954 DOI: 10.1002/anie.202105536] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/22/2021] [Indexed: 11/05/2022]
Abstract
This work presents a redox-mediated electrolytic nitrogen reduction reaction (RM-eNRR) using polyoxometalate (POM) as the electron and proton carrier which frees the TiO2 -based catalyst from the electrode and shifts the reduction of nitrogen to a reactor tank. The RM-eNRR process has achieved an ammonium production yield of 25.1 μg h-1 or 5.0 μg h-1 cm-2 at an ammonium concentration of 6.7 ppm. With high catalyst loading, 61.0 ppm ammonium was accumulated in the electrolyte upon continuous operation, which is the highest concentration detected for ambient eNRR so far. The mechanism underlying the RM-eNRR was scrutinized both experimentally and computationally to delineate the POM-mediated charge transfer and hydrogenation process of nitrogen molecule on the catalyst. RM-eNRR is expected to provide an implementable solution to overcome the limitations in the conventional eNRR process.
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Affiliation(s)
- Xun Wang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Jing Yang
- Institute of High Performance Computing, A*STAR, Singapore, 138632, Singapore
| | - Manohar Salla
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Shibo Xi
- Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore, 117603, Singapore
| | - Yi Yang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Mengsha Li
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Feifei Zhang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Ming-Ke Zhu
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Songpeng Huang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Shiqiang Huang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Yong-Wei Zhang
- Institute of High Performance Computing, A*STAR, Singapore, 138632, Singapore
| | - Qing Wang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117576, Singapore
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Groppi J, Casimiro L, Canton M, Corra S, Jafari‐Nasab M, Tabacchi G, Cavallo L, Baroncini M, Silvi S, Fois E, Credi A. Precision Molecular Threading/Dethreading. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003064] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jessica Groppi
- CLAN-Center for Light Activated Nanostructures Istituto ISOF-CNR via Gobetti 101 40129 Bologna Italy
| | - Lorenzo Casimiro
- CLAN-Center for Light Activated Nanostructures Istituto ISOF-CNR via Gobetti 101 40129 Bologna Italy
- Dipartimento di Chimica “G. Ciamician” Università di Bologna via Selmi 2 40126 Bologna Italy
| | - Martina Canton
- CLAN-Center for Light Activated Nanostructures Istituto ISOF-CNR via Gobetti 101 40129 Bologna Italy
- Dipartimento di Chimica Industriale “Toso Montanari” Università di Bologna viale del Risorgimento 4 40136 Bologna Italy
| | - Stefano Corra
- CLAN-Center for Light Activated Nanostructures Istituto ISOF-CNR via Gobetti 101 40129 Bologna Italy
- Dipartimento di Scienze e Tecnologie Agro-alimentari Università di Bologna viale Fanin 44 40127 Bologna Italy
| | - Mina Jafari‐Nasab
- Dipartimento di Chimica “G. Ciamician” Università di Bologna via Selmi 2 40126 Bologna Italy
| | - Gloria Tabacchi
- Dipartimento di Scienza ed Alta Tecnologia and INSTM Università dell'Insubria via Valleggio 11 22100 Como Italy
| | - Luigi Cavallo
- KAUST Catalysis Center King Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia
| | - Massimo Baroncini
- CLAN-Center for Light Activated Nanostructures Istituto ISOF-CNR via Gobetti 101 40129 Bologna Italy
- Dipartimento di Scienze e Tecnologie Agro-alimentari Università di Bologna viale Fanin 44 40127 Bologna Italy
| | - Serena Silvi
- CLAN-Center for Light Activated Nanostructures Istituto ISOF-CNR via Gobetti 101 40129 Bologna Italy
- Dipartimento di Chimica “G. Ciamician” Università di Bologna via Selmi 2 40126 Bologna Italy
| | - Ettore Fois
- Dipartimento di Scienza ed Alta Tecnologia and INSTM Università dell'Insubria via Valleggio 11 22100 Como Italy
| | - Alberto Credi
- CLAN-Center for Light Activated Nanostructures Istituto ISOF-CNR via Gobetti 101 40129 Bologna Italy
- Dipartimento di Chimica Industriale “Toso Montanari” Università di Bologna viale del Risorgimento 4 40136 Bologna Italy
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Groppi J, Casimiro L, Canton M, Corra S, Jafari‐Nasab M, Tabacchi G, Cavallo L, Baroncini M, Silvi S, Fois E, Credi A. Precision Molecular Threading/Dethreading. Angew Chem Int Ed Engl 2020; 59:14825-14834. [PMID: 32396687 PMCID: PMC7496742 DOI: 10.1002/anie.202003064] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Indexed: 12/12/2022]
Abstract
The general principles guiding the design of molecular machines based on interlocked structures are well known. Nonetheless, the identification of suitable molecular components for a precise tuning of the energetic parameters that determine the mechanical link is still challenging. Indeed, what are the reasons of the "all-or-nothing" effect, which turns a molecular "speed-bump" into a stopper in pseudorotaxane-based architectures? Here we investigate the threading and dethreading processes for a representative class of molecular components, based on symmetric dibenzylammonium axles and dibenzo[24]crown-8 ether, with a joint experimental-computational strategy. From the analysis of quantitative data and an atomistic insight, we derive simple rules correlating the kinetic behaviour with the substitution pattern, and provide rational guidelines for the design of modules to be integrated in molecular switches and motors with sophisticated dynamic features.
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Affiliation(s)
- Jessica Groppi
- CLAN-Center for Light Activated NanostructuresIstituto ISOF-CNRvia Gobetti 10140129BolognaItaly
| | - Lorenzo Casimiro
- CLAN-Center for Light Activated NanostructuresIstituto ISOF-CNRvia Gobetti 10140129BolognaItaly
- Dipartimento di Chimica “G. Ciamician”Università di Bolognavia Selmi 240126BolognaItaly
| | - Martina Canton
- CLAN-Center for Light Activated NanostructuresIstituto ISOF-CNRvia Gobetti 10140129BolognaItaly
- Dipartimento di Chimica Industriale “Toso Montanari”Università di Bolognaviale del Risorgimento 440136BolognaItaly
| | - Stefano Corra
- CLAN-Center for Light Activated NanostructuresIstituto ISOF-CNRvia Gobetti 10140129BolognaItaly
- Dipartimento di Scienze e Tecnologie Agro-alimentariUniversità di Bolognaviale Fanin 4440127BolognaItaly
| | - Mina Jafari‐Nasab
- Dipartimento di Chimica “G. Ciamician”Università di Bolognavia Selmi 240126BolognaItaly
| | - Gloria Tabacchi
- Dipartimento di Scienza ed Alta Tecnologia and INSTMUniversità dell'Insubriavia Valleggio 1122100ComoItaly
| | - Luigi Cavallo
- KAUST Catalysis CenterKing Abdullah University of Science and TechnologyThuwal23955-6900Saudi Arabia
| | - Massimo Baroncini
- CLAN-Center for Light Activated NanostructuresIstituto ISOF-CNRvia Gobetti 10140129BolognaItaly
- Dipartimento di Scienze e Tecnologie Agro-alimentariUniversità di Bolognaviale Fanin 4440127BolognaItaly
| | - Serena Silvi
- CLAN-Center for Light Activated NanostructuresIstituto ISOF-CNRvia Gobetti 10140129BolognaItaly
- Dipartimento di Chimica “G. Ciamician”Università di Bolognavia Selmi 240126BolognaItaly
| | - Ettore Fois
- Dipartimento di Scienza ed Alta Tecnologia and INSTMUniversità dell'Insubriavia Valleggio 1122100ComoItaly
| | - Alberto Credi
- CLAN-Center for Light Activated NanostructuresIstituto ISOF-CNRvia Gobetti 10140129BolognaItaly
- Dipartimento di Chimica Industriale “Toso Montanari”Università di Bolognaviale del Risorgimento 440136BolognaItaly
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