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Ye Z, Lu P, Chen Y, Xu Z, Huang H, Zhi M, Chen ZA, Yan B. Synthesis and photocatalytic property of Au-TiO 2 nanocomposites with controlled morphologies in microfluidic chips. LAB ON A CHIP 2024; 24:2253-2261. [PMID: 38483182 DOI: 10.1039/d3lc01053h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
We present an efficient approach for the consecutive synthesis of Au-TiO2 nanocomposites with controlled morphologies in a microfluidic chip. The seed-mediated growth method was employed to synthesize Au nanorods as the core, and TiO2 layers of varying thicknesses were deposited on the surface or tip of the Au nanorods. Au-TiO2 nanocomposites with core-shell, dumbbell, and dandelion-like structures can be precisely synthesized in a one-step manner within the microfluidic chip by finely tuning the flow rate of NaHCO3 and the amount of hexadecyl trimethyl ammonium bromide. Furthermore, we have investigated the photocatalytic activity of the synthesized nanocomposites, and it was found that Au NR-TiO2 core-shell nanostructure with a thin TiO2 shell exhibits superior catalytic performance. This work provides an effective and controlled method for the microscale preparation and photocatalytic application of various Au-TiO2 nanocomposite structures.
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Affiliation(s)
- Ziran Ye
- Department of Applied Physics, College of Science, Zhejiang University of Technology, Hangzhou, China.
- Center for Optics & Optoelectronics Research (COOR), Collaborative Innovation Center for Information Technology in Biological and Medical Physics, College of Science, Zhejiang University of Technology, Hangzhou, China
| | - Ping Lu
- Department of Applied Physics, College of Science, Zhejiang University of Technology, Hangzhou, China.
| | - Yiben Chen
- Department of Applied Physics, College of Science, Zhejiang University of Technology, Hangzhou, China.
| | - Zhixian Xu
- Department of Applied Physics, College of Science, Zhejiang University of Technology, Hangzhou, China.
| | - Haixia Huang
- Department of Applied Physics, College of Science, Zhejiang University of Technology, Hangzhou, China.
| | - Mingjia Zhi
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China
| | - Zi Ang Chen
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China
| | - Bo Yan
- Department of Applied Physics, College of Science, Zhejiang University of Technology, Hangzhou, China.
- Center for Optics & Optoelectronics Research (COOR), Collaborative Innovation Center for Information Technology in Biological and Medical Physics, College of Science, Zhejiang University of Technology, Hangzhou, China
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2
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Lau K, Giera B, Barcikowski S, Reichenberger S. The multivariate interaction between Au and TiO 2 colloids: the role of surface potential, concentration, and defects. NANOSCALE 2024; 16:2552-2564. [PMID: 38221893 DOI: 10.1039/d3nr06205h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
The established DLVO theory explains colloidal stability by the electrostatic repulsion between electrical double layers. While the routinely measured zeta potential can estimate the charges of double layers, it is only an average surface property which might deviate from the local environment. Moreover, other factors such as the ionic strength and the presence of defects should also be considered. To investigate this multivariate problem, here we model the interaction between a negatively charged Au particle and a negatively charged TiO2 surface containing positive/neutral defects (e.g. surface hydroxyls) based on the finite element method, over 6000 conditions of these 6 parameters: VPart (particle potential), VSurf (surface potential), VDef (defect potential), DD (defect density), Conc (salt concentration), and R (particle radius). Using logistic regression, the relative importance of these factors is determined: VSurf > VPart > DD > Conc > R > VDef, which agrees with the conventional wisdom that the surface (and zeta) potential is indeed the most decisive descriptor for colloidal interactions, and the salt concentration is also important for charge screening. However, when defects are present, it appears that their density is more influential than their potential. To predict the fate of interactions more confidently with all the factors, we train a support vector machine (SVM) with the simulation data, which achieves 97% accuracy in determining whether adsorption is favorable on the support. The trained SVM including a graphical user interface for querying the prediction is freely available online for comparing with other materials and models. We anticipate that our model can stimulate further colloidal studies examining the importance of the local environment, while simultaneously considering multiple factors.
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Affiliation(s)
- Kinran Lau
- Technical Chemistry I, University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE), Essen, Germany.
| | - Brian Giera
- Center for Engineered Materials and Manufacturing, Lawrence Livermore National Laboratory, California, USA
| | - Stephan Barcikowski
- Technical Chemistry I, University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE), Essen, Germany.
| | - Sven Reichenberger
- Technical Chemistry I, University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE), Essen, Germany.
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3
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Ollegott K, Wirth P, Oberste‐Beulmann C, Awakowicz P, Muhler M. Fundamental Properties and Applications of Dielectric Barrier Discharges in Plasma‐Catalytic Processes at Atmospheric Pressure. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202000075] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kevin Ollegott
- Ruhr University Bochum Laboratory of Industrial Chemistry Universitätsstraße 150 44780 Bochum Germany
| | - Philipp Wirth
- Ruhr University Bochum Institute for Electrical Engineering and Plasma Technology (AEPT) Universitätsstraße 150 44780 Bochum Germany
| | | | - Peter Awakowicz
- Ruhr University Bochum Institute for Electrical Engineering and Plasma Technology (AEPT) Universitätsstraße 150 44780 Bochum Germany
| | - Martin Muhler
- Ruhr University Bochum Laboratory of Industrial Chemistry Universitätsstraße 150 44780 Bochum Germany
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4
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Carabineiro SAC. Supported Gold Nanoparticles as Catalysts for the Oxidation of Alcohols and Alkanes. Front Chem 2019; 7:702. [PMID: 31750289 PMCID: PMC6848162 DOI: 10.3389/fchem.2019.00702] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 10/08/2019] [Indexed: 11/13/2022] Open
Abstract
Supporting gold nanoparticles have shown to be extremely active for many industrially important reactions, including oxidations. Two representative examples are the oxidation of alcohols and alkanes, that are substrates of industrial interest, but whose oxidation is still challenging. This review deals with these reactions, giving an insight of the first studies performed by gold based catalysts in these reactions and the most recent developments in the field.
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Affiliation(s)
- Sónia A C Carabineiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
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5
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Chen TM, Xu GY, Ren H, Zhang H, Tian ZQ, Li JF. Synthesis of Au@TiO 2 core-shell nanoparticles with tunable structures for plasmon-enhanced photocatalysis. NANOSCALE ADVANCES 2019; 1:4522-4528. [PMID: 36134424 PMCID: PMC9417977 DOI: 10.1039/c9na00548j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 10/09/2019] [Indexed: 06/11/2023]
Abstract
Plasmonic metal-semiconductor nanocomposites, especially those with core-shell nanostructures, have received extensive attention as they can efficiently expand light absorption and accelerate electron-hole separation thus improving the photocatalytic efficiency. However, controlled synthesis and structure manipulation of plasmonic metal-semiconductor nanocomposites still remain a significant challenge. Herein, a simple and universal method has been developed for the preparation of plasmonic Au@TiO2 core-shell nanoparticles. Using such a method, uniform TiO2 shells are successfully coated on Au nanoparticles with various morphologies including nanorods, nanocubes, and nanospheres, and the thickness and crystallinity of the TiO2 shell can be simply tuned by adjusting the pH value and thermal treatment, respectively. Furthermore, the influence of the morphology of the Au core and the thickness and crystallinity of the TiO2 shell on the photocatalytic performance of Au@TiO2 towards the photodegradation of methylene blue is systematically explored. It is found that Au@TiO2 NPs with nanorod morphology and crystalline TiO2 shells display the best performance, which is 5 times higher than that of bare Au nanoparticles. This work provides a facile strategy for the fabrication of plasmonic core-shell nanostructures that show excellent performance in plasmon-enhanced photocatalysis.
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Affiliation(s)
- Tian-Ming Chen
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Materials, College of Energy, Xiamen University Xiamen 361005 China
| | - Ge-Yang Xu
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Materials, College of Energy, Xiamen University Xiamen 361005 China
| | - He Ren
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Materials, College of Energy, Xiamen University Xiamen 361005 China
| | - Hua Zhang
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Materials, College of Energy, Xiamen University Xiamen 361005 China
| | - Zhong-Qun Tian
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Materials, College of Energy, Xiamen University Xiamen 361005 China
| | - Jian-Feng Li
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Materials, College of Energy, Xiamen University Xiamen 361005 China
- Shenzhen Research Institute of Xiamen University Shenzhen 518000 China
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6
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Lang M, Klahn M, Strunk J. Photophysical and Catalytic Properties of Silica Supported Early Transition Metal Oxides Relevant for Photocatalytic Applications. Catal Letters 2019. [DOI: 10.1007/s10562-019-02803-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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7
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Siemer N, Lüken A, Zalibera M, Frenzel J, Muñoz-Santiburcio D, Savitsky A, Lubitz W, Muhler M, Marx D, Strunk J. Atomic-Scale Explanation of O2 Activation at the Au–TiO2 Interface. J Am Chem Soc 2018; 140:18082-18092. [DOI: 10.1021/jacs.8b10929] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Niklas Siemer
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - Alexander Lüken
- Lehrstuhl für Technische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - Michal Zalibera
- Max-Planck-Institut für Chemische Energiekonversion, 45470 Mülheim/Ruhr, Germany
- Institute of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, SK-812 37 Bratislava, Slovakia
| | - Johannes Frenzel
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | | | - Anton Savitsky
- Fakultät Physik, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Wolfgang Lubitz
- Max-Planck-Institut für Chemische Energiekonversion, 45470 Mülheim/Ruhr, Germany
| | - Martin Muhler
- Lehrstuhl für Technische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - Dominik Marx
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - Jennifer Strunk
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, 18059 Rostock, Germany
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8
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Pougin A, Dodekatos G, Dilla M, Tüysüz H, Strunk J. Au@TiO2
Core-Shell Composites for the Photocatalytic Reduction of CO2. Chemistry 2018; 24:12416-12425. [DOI: 10.1002/chem.201801796] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Anna Pougin
- Laboratory of Industrial Chemistry; Ruhr-University Bochum; 44780 Bochum Germany
- Present address: Evonik Industries; Paul-Baumann-Str. 1 45772 Marl Germany
| | | | - Martin Dilla
- Max Planck Institute for Chemical Energy Conversion; 45470 Mülheim/Ruhr Germany
| | - Harun Tüysüz
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Jennifer Strunk
- Leibniz Institute for Catalysis (LIKAT) at the University of Rostock; 18059 Rostock Germany
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9
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Pougin A, Lüken A, Klinkhammer C, Hiltrop D, Kauer M, Tölle K, Havenith-Newen M, Morgenstern K, Grünert W, Muhler M, Strunk J. Probing Oxide Reduction and Phase Transformations at the Au-TiO2 Interface by Vibrational Spectroscopy. Top Catal 2017. [DOI: 10.1007/s11244-017-0851-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hiltrop D, Masa J, Botz AJR, Lindner A, Schuhmann W, Muhler M. Micrometer-Precise Determination of the Thin Electrolyte Layer of a Spectroelectrochemical Cell by Microelectrode Approach Curves. Anal Chem 2017; 89:4367-4372. [DOI: 10.1021/acs.analchem.6b03732] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dennis Hiltrop
- Laboratory
of Industrial Chemistry, ‡Analytical Chemistry - Center for
Electrochemical Sciences (CES), §Mechanical Workshop of the Faculty of Chemistry
and Biochemistry, Ruhr-Universität Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Justus Masa
- Laboratory
of Industrial Chemistry, ‡Analytical Chemistry - Center for
Electrochemical Sciences (CES), §Mechanical Workshop of the Faculty of Chemistry
and Biochemistry, Ruhr-Universität Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Alexander J. R. Botz
- Laboratory
of Industrial Chemistry, ‡Analytical Chemistry - Center for
Electrochemical Sciences (CES), §Mechanical Workshop of the Faculty of Chemistry
and Biochemistry, Ruhr-Universität Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Armin Lindner
- Laboratory
of Industrial Chemistry, ‡Analytical Chemistry - Center for
Electrochemical Sciences (CES), §Mechanical Workshop of the Faculty of Chemistry
and Biochemistry, Ruhr-Universität Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Wolfgang Schuhmann
- Laboratory
of Industrial Chemistry, ‡Analytical Chemistry - Center for
Electrochemical Sciences (CES), §Mechanical Workshop of the Faculty of Chemistry
and Biochemistry, Ruhr-Universität Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
| | - Martin Muhler
- Laboratory
of Industrial Chemistry, ‡Analytical Chemistry - Center for
Electrochemical Sciences (CES), §Mechanical Workshop of the Faculty of Chemistry
and Biochemistry, Ruhr-Universität Bochum, Universitätsstr.
150, D-44780 Bochum, Germany
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11
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Z-scheme visible-light-driven Ag3PO4 nanoparticle@MoS2 quantum dot/few-layered MoS2 nanosheet heterostructures with high efficiency and stability for photocatalytic selective oxidation. J Catal 2017. [DOI: 10.1016/j.jcat.2016.11.013] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Okuno T, Kawamura G, Muto H, Matsuda A. Photocatalytic properties of Au-deposited mesoporous SiO2–TiO2 photocatalyst under simultaneous irradiation of UV and visible light. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2015.12.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Ristig S, Cibura N, Strunk J. Manganese Oxides in Heterogeneous (Photo)Catalysis: Possibilities and Challenges. ACTA ACUST UNITED AC 2015. [DOI: 10.1515/green-2015-0010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
AbstractThe aim to develop active photocatalysts based on abundant elements for solar energy conversion reactions has sparked wide interest in manganese oxides as visible light-absorbing alternative to TiO
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