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Inico E, Saetta C, Di Liberto G. Impact of quantum size effects to the band gap of catalytic materials: a computational perspective. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:361501. [PMID: 38830369 DOI: 10.1088/1361-648x/ad53b5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 06/03/2024] [Indexed: 06/05/2024]
Abstract
The evolution of nanotechnology has facilitated the development of catalytic materials with controllable composition and size, reaching the sub-nanometer limit. Nowadays, a viable strategy for tailoring and optimizing the catalytic activity involves controlling the size of the catalyst. This strategy is underpinned by the fact that the properties and reactivity of objects with dimensions on the order of nanometers can differ from those of the corresponding bulk material, due to the emergence of quantum size effects. Quantum size effects have a deep influence on the band gap of semiconducting catalytic materials. Computational studies are valuable for predicting and estimating the impact of quantum size effects. This perspective emphasizes the crucial role of modeling quantum size effects when simulating nanostructured catalytic materials. It provides a comprehensive overview of the fundamental principles governing the physics of quantum confinement in various experimentally observable nanostructures. Furthermore, this work may serve as a tutorial for modeling the electronic gap of simple nanostructures, highlighting that when working at the nanoscale, the finite dimensions of the material lead to an increase of the band gap because of the emergence of quantum confinement. This aspect is sometimes overlooked in computational chemistry studies focused on surfaces and nanostructures.
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Affiliation(s)
- Elisabetta Inico
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Clara Saetta
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Giovanni Di Liberto
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
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2
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Shinagawa T, Kotobuki N, Ohtaka A. Oriented growth of stacking α-cobalt hydroxide salt continuous films and their topotactic-like transformation to oriented mesoporous films of Co 3O 4 and CoO. NANOSCALE ADVANCES 2022; 5:96-105. [PMID: 36605813 PMCID: PMC9765712 DOI: 10.1039/d2na00594h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 10/18/2022] [Indexed: 06/17/2023]
Abstract
Mesoporous metal oxide films composed of nanocrystal assemblies with an aligned crystallographic orientation are key nanostructures for efficient interfacial reactions; however, the development of a simple and versatile method for their formation on substrates still constitutes a challenge. Here we report the template-free centimetre-scale formation of novel cobalt oxide films of Co3O4 and CoO with a [111]-oriented mesoporous structure starting from stacking cobalt hydroxide continuous films. The cobalt hydroxide precursor is formed electrochemically on conductive substrates from a Co(NO3)2 aqueous solution at room temperature. A thorough characterization by means of scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis-NIR spectroscopy, IR spectroscopy and Raman spectroscopy analyses reveals that the precursor film is an α-type layered cobalt hydroxide salt (α-Co-LHS) containing interlayer nitrate and hydrated water, i.e., α-Co(OH) x (NO3) y ·nH2O, with a [001]-oriented stacking film structure. Heat treatment of the [001]-α-Co-LHS films using different conditions, i.e., under air at 550 °C or under vacuum at 500 °C, results in the selective formation of Co3O4 or CoO mesoporous films, respectively. A plausible explanation for the observed centimetre-scale topotactic-like transformation from α-Co-LHS[001] to Co3O4[111] or CoO[111] is given according to the atomic framework similarity between the hydroxide precursor and the final oxides.
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Affiliation(s)
- Tsutomu Shinagawa
- Electronic Materials Research Division, Morinomiya Center, Osaka Research Institute of Industrial Science and Technology (ORIST) 1-6-50 Morinomiya, Joto Osaka 536-8553 Japan
| | - Natsuko Kotobuki
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology 5-16-1 Ohmiya, Asahi Osaka 535-8585 Japan
| | - Atsushi Ohtaka
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology 5-16-1 Ohmiya, Asahi Osaka 535-8585 Japan
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3
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Boytsova O, Zhukova I, Tatarenko A, Shatalova T, Beiltiukov A, Eliseev A, Sadovnikov A. The Anatase-to-Rutile Phase Transition in Highly Oriented Nanoparticles Array of Titania with Photocatalytic Response Changes. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4418. [PMID: 36558271 PMCID: PMC9785057 DOI: 10.3390/nano12244418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 11/30/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
An array of highly oriented anatase nanoparticles was successfully prepared from NH4TiOF3 with the assistance of polyetheleneglycol-400 at 450 °C. The study showed the stability of obtained layered TiO2-anatase close to 1200 °C. This research confirmed for the first time that the transition of mesocrystalline anatase to the rutile phase occurs between 1000 °C and 1200 °C, which is more than 400 °C higher than the transition of bulk TiO2 due to the used precursor. A small quantity of K-phase nanowhiskers, which issued after 800 °C in the composite based on TiO2, stimulated a fourfold increase in photocatalytic performance. This study offers a new approach to the construction and preparation of effective nanocrystalline photocatalyst.
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Affiliation(s)
- Olga Boytsova
- Department of Materials Science, Lomonosov Moscow State University, Building 73, Leninskie Gory 1, Moscow 119991, Russia
- Department of Chemistry, Lomonosov Moscow State University, Building 3, Leninskie Gory 1, Moscow 119991, Russia
| | - Irina Zhukova
- Department of Materials Science, Lomonosov Moscow State University, Building 73, Leninskie Gory 1, Moscow 119991, Russia
| | - Artem Tatarenko
- Department of Materials Science, Lomonosov Moscow State University, Building 73, Leninskie Gory 1, Moscow 119991, Russia
| | - Tatiana Shatalova
- Department of Chemistry, Lomonosov Moscow State University, Building 3, Leninskie Gory 1, Moscow 119991, Russia
| | - Artemii Beiltiukov
- Udmurt Federal Research Center of UB RAS, T. Baramzina Str. 34, Izhevsk 426067, Russia
| | - Andrei Eliseev
- Department of Materials Science, Lomonosov Moscow State University, Building 73, Leninskie Gory 1, Moscow 119991, Russia
| | - Alexey Sadovnikov
- Kurnakov Institute of General and Inorganic Chemistry RAS, Leninskii Prosp. 31, Moscow 119071, Russia
- Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninskii Prosp. 29, Moscow 119991, Russia
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4
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Synthesis and Characterization of Anatase TiO2 Nanorods: Insights from Nanorods’ Formation and Self-Assembly. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031614] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Highly crystalline, organic-solvent-dispersible titanium dioxide (TiO2) nanorods (NRs) present promising chemicophysical properties in many diverse applications. In this paper, based on a modified procedure from literature, TiO2 NRs were synthesized via a ligand-assisted nonhydrolytic sol-gel route using oleic acid as the solvent, reagent, and ligand and titanium (IV) isopropoxide as the titanium precursor. This procedure produced monodisperse TiO2 NRs, as well as some semi-spherical titania nanocrystals (NCs) that could be removed by size-selective precipitation. X-ray diffraction and selected area electron diffraction results showed that the nanorods were anatase, while the semipheres also contained the TiO2(B) phase. By taking samples during the particle growth, it was found that the average length of the initially grown NRs decreased during the synthesis. Possible reasons for this unusual growth path, partially based on high-resolution transmission electron microscopy (HRTEM) observations during the growth, were discussed. The dispersion of anatase TiO2 nanorods was capable of spontaneous formation of lyotropic liquid crystals on the TEM grid and in bulk. Considering high colloidal stability together with the large optical birefringence displayed by these high refractive index liquid crystalline domains, we believe these TiO2 NRs dispersions are promising candidates for application in transparent and switchable optics.
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Primc D, Indrizzi L, Tervoort E, Xie F, Niederberger M. Synthesis of Cu 3N and Cu 3N-Cu 2O multicomponent mesocrystals: non-classical crystallization and nanoscale Kirkendall effect. NANOSCALE 2021; 13:17521-17529. [PMID: 34652362 DOI: 10.1039/d1nr05767g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Mesocrystals are superstructures of crystallographically aligned nanoparticles and are a rapidly emerging class of crystalline materials displaying sophisticated morphologies and properties, beyond those originating from size and shape of nanoparticles alone. This study reports the first synthesis of Cu3N mesocrystals employing structure-directing agents with a subtle tuning of the reaction parameters. Detailed structural characterizations carried out with a combination of transmission electron microscopy techniques (HRTEM, HAADF-STEM-EXDS) reveal that Cu3N mesocrystals form by non-classical crystallization, and variations in their sizes and morphologies are traced back to distinct attachment scenarios of corresponding mesocrystal subunits. In the presence of oleylamine, the mesocrystal subunits in the early reaction stages prealign in a crystallographic fashion and afterwards grow into the final mesocrystals, while in the presence of hexadecylamine the subunits come into contact through misaligned attachment, and subsequently, to some degree, realign in crystallographic register. Upon prolonged heating both types of mesocrystals undergo chemical conversion processes resulting in structural and morphological changes. A two-step mechanism of chemical conversion is proposed, involving Cu3N decomposition and anion exchange driven by the nanoscale Kirkendall effect, resulting first in multicomponent/heterostructured Cu3N-Cu2O mesocrystals, which subsequently convert into Cu2O nanocages. It is anticipated that combining nanostructured Cu3N and Cu2O in a mesocrystalline and hollow morphology will provide a platform to expand their application potential.
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Affiliation(s)
- Darinka Primc
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland.
- Department of Materials and London Centre for Nanotechnology, Imperial College London, London SW7 2AZ, UK
| | - Luca Indrizzi
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland.
| | - Elena Tervoort
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland.
| | - Fang Xie
- Department of Materials and London Centre for Nanotechnology, Imperial College London, London SW7 2AZ, UK
| | - Markus Niederberger
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zurich, Switzerland.
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Sun S, Yang X, Yang M, Cui J, Yang Q, Liang S. Surface engraving engineering of polyhedral photocatalysts. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01153g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Surface engraving engineering of polyhedral photocatalysts is overviewed based on synthetic strategies and engraved surface-related photocatalytic mechanisms. Some challenges and perspectives are also proposed.
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Affiliation(s)
- Shaodong Sun
- Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education; Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology; Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology; School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China
| | - Xiaoli Yang
- Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education; Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology; Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology; School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China
| | - Man Yang
- Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education; Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology; Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology; School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China
| | - Jie Cui
- Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education; Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology; Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology; School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China
| | - Qing Yang
- Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education; Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology; Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology; School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China
| | - Shuhua Liang
- Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education; Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology; Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology; School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China
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7
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Brunner J, Maier B, Rosenberg R, Sturm S, Cölfen H, Sturm EV. Nonclassical Recrystallization. Chemistry 2020; 26:15242-15248. [PMID: 32569441 PMCID: PMC7756702 DOI: 10.1002/chem.202002873] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Indexed: 11/17/2022]
Abstract
Applications in the fields of materials science and nanotechnology increasingly demand monodisperse nanoparticles in size and shape. Up to now, no general purification procedure exists to thoroughly narrow the size and shape distributions of nanoparticles. Here, we show by analytical ultracentrifugation (AUC) as an absolute and quantitative high‐resolution method that multiple recrystallizations of nanocrystals to mesocrystals is a very efficient tool to generate nanocrystals with an excellent and so‐far unsurpassed size‐distribution (PDIc=1.0001) and shape. Similar to the crystallization of molecular building blocks, nonclassical recrystallization removes “colloidal” impurities (i.e., nanoparticles, which are different in shape and size from the majority) by assembling them into a mesocrystal. In the case of nanocrystals, this assembly can be size‐ and shape‐selective, since mesocrystals show both long‐range packing ordering and preferable crystallographic orientation of nanocrystals. Besides the generation of highly monodisperse nanoparticles, these findings provide highly relevant insights into the crystallization of mesocrystals.
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Affiliation(s)
- Julian Brunner
- Physical Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
| | - Britta Maier
- Physical Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
| | - Rose Rosenberg
- Physical Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
| | - Sebastian Sturm
- Institute for Solid State Research, Leibniz Institute for Solid State and Materials Research Dresden, Helmholzstraße 20, 01069, Dresden, Germany
| | - Helmut Cölfen
- Physical Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
| | - Elena V Sturm
- Physical Chemistry, University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany
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8
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Qi HP, Wang HL, Zhao DY. Facile synthesis of rGO-supported AgI-TiO 2 mesocrystals with enhanced visible light photocatalytic activity. NANOTECHNOLOGY 2020; 31:375701. [PMID: 32498050 DOI: 10.1088/1361-6528/ab996d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Facile synthesis of novel rGO-supported AgI decorated TiO2 mesocrystals (AgI-TMCs-rGO) and their photocatalytic activity under visible light irradiation are reported. The catalysts were prepared by combining the hydrothermal reaction process and in situ deposition-precipitation method. The structural features and chemical compositions of the prepared catalysts were investigated by HRTEM (high resolution transmission electron microscopy), XRD (x-ray powder diffraction), Raman spectra, XPS (x-ray photoelectron spectroscopy), UV-vis DRS (UV-vis diffuse reflectance spectra), PLS (photoluminescence spectra), and N2 physisorption measurements. The AgI-TMCs-rGO catalysts featured a large surface area, high adsorption capacity, enhanced photo-induced charge separation and strong absorbance of visible light. The intimate contact of various components and the fast transfer of charge carriers effectively suppresses photolysis of AgI and favors the structural stability of AgI-TMCs-rGO. The photocatalytic activity of the catalysts was evaluated by degrading Rhodamine B (RhB) in an aqueous solution under visible light irradiation. The highest photocatalytic activity was observed in the sample 20%Ag-TMCs-rGO, attributed to the synergistic effects of a lower band gap and a lowerrecombination rate of the charge carriers, along with the larger surface area of the fabricated sample.
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Affiliation(s)
- Hui-Ping Qi
- Department of Chemistry, Dalian University of Technology, Dalian 116023, People's Republic of China
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9
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Böhm CF, Harris J, Schodder PI, Wolf SE. Bioinspired Materials: From Living Systems to New Concepts in Materials Chemistry. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2117. [PMID: 31266158 PMCID: PMC6651889 DOI: 10.3390/ma12132117] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/25/2019] [Accepted: 06/27/2019] [Indexed: 11/16/2022]
Abstract
Nature successfully employs inorganic solid-state materials (i.e., biominerals) and hierarchical composites as sensing elements, weapons, tools, and shelters. Optimized over hundreds of millions of years under evolutionary pressure, these materials are exceptionally well adapted to the specifications of the functions that they perform. As such, they serve today as an extensive library of engineering solutions. Key to their design is the interplay between components across length scales. This hierarchical design-a hallmark of biogenic materials-creates emergent functionality not present in the individual constituents and, moreover, confers a distinctly increased functional density, i.e., less material is needed to provide the same performance. The latter aspect is of special importance today, as climate change drives the need for the sustainable and energy-efficient production of materials. Made from mundane materials, these bioceramics act as blueprints for new concepts in the synthesis and morphosynthesis of multifunctional hierarchical materials under mild conditions. In this review, which also may serve as an introductory guide for those entering this field, we demonstrate how the pursuit of studying biomineralization transforms and enlarges our view on solid-state material design and synthesis, and how bioinspiration may allow us to overcome both conceptual and technical boundaries.
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Affiliation(s)
- Corinna F Böhm
- Department of Materials Science and Engineering (WW), Institute of Glass and Ceramics (WW3), Friedrich-Alexander University Erlangen-Nuremberg (FAU), Martensstrasse 5, D-91058 Erlangen, Germany
| | - Joe Harris
- Department of Materials Science and Engineering (WW), Institute of Glass and Ceramics (WW3), Friedrich-Alexander University Erlangen-Nuremberg (FAU), Martensstrasse 5, D-91058 Erlangen, Germany
| | - Philipp I Schodder
- Department of Materials Science and Engineering (WW), Institute of Glass and Ceramics (WW3), Friedrich-Alexander University Erlangen-Nuremberg (FAU), Martensstrasse 5, D-91058 Erlangen, Germany
| | - Stephan E Wolf
- Department of Materials Science and Engineering (WW), Institute of Glass and Ceramics (WW3), Friedrich-Alexander University Erlangen-Nuremberg (FAU), Martensstrasse 5, D-91058 Erlangen, Germany.
- Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander University Erlangen-Nuremberg, 91058 Erlangen, Germany.
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10
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Gebauer D, Wolf SE. Designing Solid Materials from Their Solute State: A Shift in Paradigms toward a Holistic Approach in Functional Materials Chemistry. J Am Chem Soc 2019; 141:4490-4504. [DOI: 10.1021/jacs.8b13231] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Denis Gebauer
- Department of Chemistry, Physical Chemistry, University of Konstanz, 78457 Konstanz, Germany
| | - Stephan E. Wolf
- Department of Materials Science and Engineering, Institute of Glass and Ceramics and Interdisciplinary Center for Functional Particle Systems, Friedrich-Alexander-University Erlangen-Nuremberg, 91058 Erlangen, Germany
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11
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Titanium Dioxide (TiO2) Mesocrystals: Synthesis, Growth Mechanisms and Photocatalytic Properties. Catalysts 2019. [DOI: 10.3390/catal9010091] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Hierarchical TiO2 superstructures with desired architectures and intriguing physico-chemical properties are considered to be one of the most promising candidates for solving the serious issues related to global energy exhaustion as well as environmental deterioration via the well-known photocatalytic process. In particular, TiO2 mesocrystals, which are built from TiO2 nanocrystal building blocks in the same crystallographical orientation, have attracted intensive research interest in the area of photocatalysis owing to their distinctive structural properties such as high crystallinity, high specific surface area, and single-crystal-like nature. The deeper understanding of TiO2 mesocrystals-based photocatalysis is beneficial for developing new types of photocatalytic materials with multiple functionalities. In this paper, a comprehensive review of the recent advances toward fabricating and modifying TiO2 mesocrystals is provided, with special focus on the underlying mesocrystallization mechanism and controlling rules. The potential applications of as-synthesized TiO2 mesocrystals in photocatalysis are then discussed to shed light on the structure–performance relationships, thus guiding the development of highly efficient TiO2 mesocrystal-based photocatalysts for certain applications. Finally, the prospects of future research on TiO2 mesocrystals in photocatalysis are briefly highlighted.
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12
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Sun S, Yu X, Yang Q, Yang Z, Liang S. Mesocrystals for photocatalysis: a comprehensive review on synthesis engineering and functional modifications. NANOSCALE ADVANCES 2019; 1:34-63. [PMID: 36132462 PMCID: PMC9473194 DOI: 10.1039/c8na00196k] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 09/14/2018] [Indexed: 05/10/2023]
Abstract
Mesocrystals are a new class of superstructures that are generally made of crystallographically highly ordered nanoparticles and could function as intermediates in a non-classical particle-mediated aggregation process. In the past decades, extensive research interest has been focused on the structural and morphogenetic aspects, as well as the growth mechanisms, of mesocrystals. Unique physicochemical properties including high surface area and ordered porosity provide new opportunities for potential applications. In particular, the oriented interfaces in mesocrystals are considered to be beneficial for effective photogenerated charge transfer, which is a promising photocatalytic candidate for promoting charge carrier separation. Only recently, remarkable advances have been reported with a special focus on TiO2 mesocrystal photocatalysts. However, there is still no comprehensive overview on various mesocrystal photocatalysts and their functional modifications. In this review, different kinds of mesocrystal photocatalysts, such as TiO2 (anatase), TiO2 (rutile), ZnO, CuO, Ta2O5, BiVO4, BaZrO3, SrTiO3, NaTaO3, Nb3O7(OH), In2O3-x (OH) y , and AgIn(WO4)2, are highlighted based on the synthesis engineering, functional modifications (including hybridization and doping), and typical structure-related photocatalytic mechanisms. Several current challenges and crucial issues of mesocrystal-based photocatalysts that need to be addressed in future studies are also given.
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Affiliation(s)
- Shaodong Sun
- Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology Xi'an 710048 Shaanxi People's Republic of China
| | - Xiaojing Yu
- Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology Xi'an 710048 Shaanxi People's Republic of China
| | - Qing Yang
- Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology Xi'an 710048 Shaanxi People's Republic of China
| | - Zhimao Yang
- School of Science, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University Xi'an 710049 Shaanxi People's Republic of China
| | - Shuhua Liang
- Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology Xi'an 710048 Shaanxi People's Republic of China
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13
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Xiang M, Song M, Zhu Q, Yang Y, Li S, Hu C, Lv P, Pan F, Ge Y. Synthesis of high melting point TiN mesocrystal powders by a metastable state strategy. CrystEngComm 2019. [DOI: 10.1039/c8ce02156b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of high melting point non-oxide ceramic powders with mesocrystal structure is an important and challenging task.
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Affiliation(s)
- Maoqiao Xiang
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- PR China
| | - Miao Song
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- PR China
| | - Qingshan Zhu
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- PR China
| | - Yafeng Yang
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- PR China
| | - Shaofu Li
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- PR China
| | - Chaoquan Hu
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- PR China
| | - Pengpeng Lv
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- PR China
| | - Feng Pan
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- PR China
| | - Yu Ge
- State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- PR China
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14
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Zhang P, Tachikawa T, Fujitsuka M, Majima T. The Development of Functional Mesocrystals for Energy Harvesting, Storage, and Conversion. Chemistry 2017; 24:6295-6307. [DOI: 10.1002/chem.201704680] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Indexed: 01/24/2023]
Affiliation(s)
- Peng Zhang
- The Institute of Scientific and Industrial Research (SANKEN); Osaka University; Mihogaoka 8-1 Ibaraki, Osaka 567-0047 Japan
| | - Takashi Tachikawa
- Molecular Photoscience Research Center; Kobe University; 1-1 Rokkodai-cho Nada-ku Kobe 657-8501 Japan
- PRESTO, Science and Technology Agency (JST); 24-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
| | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN); Osaka University; Mihogaoka 8-1 Ibaraki, Osaka 567-0047 Japan
| | - Tetsuro Majima
- The Institute of Scientific and Industrial Research (SANKEN); Osaka University; Mihogaoka 8-1 Ibaraki, Osaka 567-0047 Japan
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15
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Deshmukh R, Niederberger M. Mechanistic Aspects in the Formation, Growth and Surface Functionalization of Metal Oxide Nanoparticles in Organic Solvents. Chemistry 2017; 23:8542-8570. [DOI: 10.1002/chem.201605957] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Rupali Deshmukh
- Laboratory for Multifunctional Materials, Department of Materials; ETH Zürich; Vladimir-Prelog-Weg 5 8093 Zürich Switzerland
| | - Markus Niederberger
- Laboratory for Multifunctional Materials, Department of Materials; ETH Zürich; Vladimir-Prelog-Weg 5 8093 Zürich Switzerland
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16
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17
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Chen Q, Jia C, Li Y, Xu J, Guan B, Yates MZ. α-Calcium Sulfate Hemihydrate Nanorods Synthesis: A Method for Nanoparticle Preparation by Mesocrystallization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2362-2369. [PMID: 28161955 DOI: 10.1021/acs.langmuir.7b00013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The past decades have witnessed great advances in nanotechnology since tremendous efforts have been devoted for the design, synthesis, and application of nanoparticles. However, for most mineral materials such as calcium sulfate, it is still a challenge to prepare their nanoparticles, especially with uniform size and high monodispersity. In this work, we report a route to regulate the morphology and structure of α-calcium sulfate hemihydrate (α-HH) and successfully synthesize and stabilize its mesocrystals for the first time. The ellipsoidal mesocrystals in length of 300-500 nm are composed by α-HH nanoparticles arranged in the same crystallographic fashion and interspaced with EDTA. The time-dependent experiments indicate the α-HH aggregates evolve from irregular structure to mesocrystal structure with the subsequent growth of subunits and then partially fuse into single crystals. Disorganizing the mesocrystal structure before the emergence of fusion reaps α-HH nanorods in a length of 30-80 nm and a width of 10-20 nm with high monodispersion. This ingenious concept paves an alternative way for nanoparticle preparation and is readily extended to other inorganic systems.
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Affiliation(s)
- Qiaoshan Chen
- Department of Environmental Engineering, Zhejiang University , Hangzhou 310058, China
| | - Caiyun Jia
- Department of Environmental Engineering, Zhejiang University , Hangzhou 310058, China
| | - Yu Li
- Department of Environmental Engineering, Zhejiang University , Hangzhou 310058, China
| | - Jie Xu
- Department of Environmental Engineering, Zhejiang University , Hangzhou 310058, China
| | - Baohong Guan
- Department of Environmental Engineering, Zhejiang University , Hangzhou 310058, China
| | - Matthew Z Yates
- Department of Chemical Engineering, University of Rochester , Rochester, New York 14627, United States
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18
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Tan B, Zhang X, Li Y, Chen H, Ye X, Wang Y, Ye J. Anatase TiO 2 Mesocrystals: Green Synthesis, In Situ Conversion to Porous Single Crystals, and Self-Doping Ti 3+ for Enhanced Visible Light Driven Photocatalytic Removal of NO. Chemistry 2017; 23:5478-5487. [PMID: 28118505 DOI: 10.1002/chem.201605294] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Indexed: 11/09/2022]
Abstract
Mesocrystals are of great interest for a wide range of applications owing to their unique structural features and properties. The realization of well-defined metal oxide mesocrystals through a facile and green synthetic approach still remains a great challenge. Here, a novel synthesis strategy is reported for the production of spindle-shaped anatase TiO2 mesocrystals with a single-crystal-like structure, which was simply achieved through the one-step hydrolysis reaction of TiCl3 in the green and recyclable media polyethylene glycol (PEG-400) without any additives. Such anatase mesocrystals were constructed from small nanocrystal subunits (≈1.5-4.5 nm in diameter) and formed through oriented aggregation of the nanocrystals pre-formed in the reaction system. Owing to their novel structural characteristics, the as-synthesized anatase mesocrystals could be easily fused in situ into porous single crystals by annealing in air. More significantly, after being annealed in vacuum, Ti3+ sites could be easily induced in the anatase crystal lattice, resulting in the formation of Ti3+ self-doped anatase mesocrystals. The thus-transformed mesocrystals exhibited enhanced visible light activity towards the photocatalytic oxidation of nitric oxide (NO) to NO3- , which could be largely attributed to their intrinsic Ti3+ self-doped nature, as well as high crystallinity and high porosity of the mesocrystalline architecture.
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Affiliation(s)
- Biying Tan
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Xuehao Zhang
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Yongjun Li
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Hao Chen
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Xiaozhou Ye
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Yun Wang
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
| | - Jianfeng Ye
- Department of Chemistry, College of Science, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan, 430070, P. R. China
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19
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Harish S, Sabarinathan M, Kristy AP, Archana J, Navaneethan M, Ikeda H, Hayakawa Y. ZnS quantum dots impregnated-mesoporous TiO2 nanospheres for enhanced visible light induced photocatalytic application. RSC Adv 2017. [DOI: 10.1039/c7ra03061d] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
ZnS quantum dots were impregnated on the surface of TiO2 mesospheres by a soft template-assisted solvothermal approach.
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Affiliation(s)
- S. Harish
- Research Institute of Electronics
- Shizuoka University
- Shizuoka 432-8011
- Japan
| | - M. Sabarinathan
- Research Institute of Electronics
- Shizuoka University
- Shizuoka 432-8011
- Japan
| | - A. Periyanayaga Kristy
- SRM Research Institute
- Department of Physics and Nanotechnology
- SRM University
- Chennai
- India
| | - J. Archana
- SRM Research Institute
- Department of Physics and Nanotechnology
- SRM University
- Chennai
- India
| | - M. Navaneethan
- Research Institute of Electronics
- Shizuoka University
- Shizuoka 432-8011
- Japan
| | - H. Ikeda
- Research Institute of Electronics
- Shizuoka University
- Shizuoka 432-8011
- Japan
| | - Y. Hayakawa
- Research Institute of Electronics
- Shizuoka University
- Shizuoka 432-8011
- Japan
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20
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WANG Q, YUE M, ZHONG Q, CUI M, HUANG X, HOU Y, WANG L, YANG Y, LONG Z, FENG Z. Structure and properties of cerium zirconium mixed oxide prepared under different precipitate aging processes. J RARE EARTH 2016. [DOI: 10.1016/s1002-0721(16)60081-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Liberti E, Menzel R, Shaffer MSP, McComb DW. Probing the size dependence on the optical modes of anatase nanoplatelets using STEM-EELS. NANOSCALE 2016; 8:9727-9735. [PMID: 27113455 DOI: 10.1039/c5nr09264g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Anatase titania nanoplatelets with predominantly exposed {001} facets have been reported to have enhanced catalytic properties in comparison with bulk anatase. To understand their unusual behaviour, it is essential to fully characterize their electronic and optical properties at the nanometer scale. One way of assessing these fundamental properties is to study the dielectric function. Valence electron energy-loss spectroscopy (EELS) performed using a scanning transmission electron microscope (STEM) is the only analytical method that can probe the complex dielectric function with both high energy (<100 meV) and high spatial (<1 nm) resolution. By correlating experimental STEM-EELS data with simulations based on semi-classical dielectric theory, the dielectric response of thin (<5 nm) anatase nanoplatelets was found to be largely dominated by characteristic (optical) surface modes, which are linked to surface plasmon modes of anatase. For platelets less than 10 nm thick, the frequency of these optical modes varies according to their thickness. This unique optical behaviour prompts the enhancement of light absorption in the ultraviolet regime. Finally, the effect of finite size on the dielectric signal is gradually lost by stacking consistently two or more platelets in a specific crystal orientation, and eventually suppressed for large stacks of platelets.
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Affiliation(s)
- Emanuela Liberti
- Imperial College London, Department of Materials, London SW7 2AZ, UK.
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22
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Wen Z, Wang G. In-situ Liquid Phase Epitaxy: Another Strategy to Synthesize Heterostructured Core-shell Composites. Sci Rep 2016; 6:25260. [PMID: 27121200 PMCID: PMC4848523 DOI: 10.1038/srep25260] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 04/14/2016] [Indexed: 11/10/2022] Open
Abstract
Core-shell Nb2O5/TiO2 composite with hierarchical heterostructure is successfully synthesized In-situ by a facile template-free and acid-free solvothermal method based on the mechanism of liquid phase epitaxy. The chemical circumstance change induced by the alcoholysis of NbCl5 is utilized tactically to trigger core-shell assembling In-situ. The tentative mechanism for the self-assembling of core-shell structure and hierarchical structure is explored. The microstructure and morphology changes during synthesis process are investigated systematically by using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and transmission electron microscopy. The dramatic alcoholysis of NbCl5 has been demonstrated to be the fundamental factor for the formation of the spherical core, which changes the acid circumstance of the solution and induces the co-precipitation of TiO2. The homogeneous co-existence of Nb2O5/TiO2 in the core and the co-existence of Nb/Ti ions in the reaction solution facilitate the In-situ nucleation and epitaxial growth of the crystalline shell with the same composition as the core. In-situ liquid phase epitaxy can offer a different strategy for the core-shell assembling for oxide materials.
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Affiliation(s)
- Zhongsheng Wen
- Department of Materials, Dalian Maritime University, 116026 Dalian, China
| | - Guanqin Wang
- Department of Materials, Dalian Maritime University, 116026 Dalian, China
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23
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Jordan V, Javornik U, Plavec J, Podgornik A, Rečnik A. Self-assembly of multilevel branched rutile-type TiO2 structures via oriented lateral and twin attachment. Sci Rep 2016; 6:24216. [PMID: 27063110 PMCID: PMC4827082 DOI: 10.1038/srep24216] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 03/22/2016] [Indexed: 12/17/2022] Open
Abstract
Recent breakthrough of novel hierarchic materials, orchestrated through oriented attachment of crystal subunits, opened questions on what is the mechanism of their self-assembly. Using rutile-type TiO2, synthesized by hydrothermal reaction of Ti(IV)-butoxide in highly acidic aqueous medium, we uncovered the key processes controlling this nonclassical crystallization process. Formation of complex branched mesocrystals of rutile is accomplished by oriented assembly of precipitated fibers along the two low-energy planes, i.e. {110} and {101}, resulting in lateral attachment and twinning. Phase analysis of amorphous material enclosed in pockets between imperfectly assembled rutile fibers clearly shows harmonic ordering resembling that of the adjacent rutile structure. To our understanding this may be the first experimental evidence indicating the presence of electromagnetic force-fields that convey critical structural information through which oriented attachment of nanocrystals is made possible.
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Affiliation(s)
- Vanja Jordan
- Department for Nanostructured Materials, Jožef Stefan Institute &Jožef Stefan International Postgraduate School, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
| | - Uroš Javornik
- Slovenian NMR centre, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
| | - Janez Plavec
- Slovenian NMR centre, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
| | - Aleš Podgornik
- Centre of Excellence for Biosensors, Instrumentation and Process Control, Tovarniška 26, SI-5270 Ajdovščina, Slovenia
| | - Aleksander Rečnik
- Department for Nanostructured Materials, Jožef Stefan Institute &Jožef Stefan International Postgraduate School, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
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24
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Egorysheva AV, Gajtko OM, Rudnev PO, Ellert OG, Ivanov VK. Synthesis of Bi–Fe–Sb–O Pyrochlore Nanoparticles with Visible‐Light Photocatalytic Activity. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501159] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Anna V. Egorysheva
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, 119991, Moscow, Russia
| | - Olga M. Gajtko
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, 119991, Moscow, Russia
| | - Pavel O. Rudnev
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, 119991, Moscow, Russia
| | - Olga G. Ellert
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, 119991, Moscow, Russia
| | - Vladimir K. Ivanov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, 119991, Moscow, Russia
- National Research Tomsk State University, Tomsk, Russia
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25
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Yan Z, Chen Q, Xia P, Ma W, Ren B. Strong interactions between Au nanoparticles and TiO2 mesocrystal: highly selective photocatalytic reduction of nitroarenes. NANOTECHNOLOGY 2016; 27:035707. [PMID: 26656241 DOI: 10.1088/0957-4484/27/3/035707] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Au/TiO2 mesocrystals (Au/TMCs) were synthesized via a template-free solvothermal approach, followed with in situ photoreduction of gold chloride tetrahydrate for deposition of Au nanoparticles (AuNPs). The microstructure and components of the photocatalysts were characterized with various techniques. The results indicated that the AuNPs selectively anchored on the (101) facet of TiO2 mesocrystals (TMCs). More interestingly, the strong interactions occurred between AuNP and TMC support, due to the formation of a close Schottky heterointerface, combined with Ti-O-Au chemical bonds partially formed. Unexpectedly, it was found that the AuNPs typically aligned with their [111] direction, parallelling to the [101] direction of TMC in many cases. Au/TMCs exhibited high selectivity and activity for the transformation of nitroarenes to corresponding azoxyarenes, which could be attributed to not only the plasmonic effect of AuNPs and the unique superstructure of TMC, but also the highly strong interaction between AuNPs and TMCs through the close Schottky heterointerface.
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Affiliation(s)
- Ziran Yan
- Advanced building materials Engineering Research Centre, the Ministry of Education, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, 336 Nanxinzhuang West Rd, Jinan, Shandong 250022, People's Republic of China
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26
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Lai LL, Wen W, Wu JM. Ni-doped rutile TiO2 nanoflowers: low-temperature solution synthesis and enhanced photocatalytic efficiency. RSC Adv 2016. [DOI: 10.1039/c6ra01752e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
A facile solution approach was developed to synthesize micrometre-sized aggregates of Ni-doped TiO2 nanoflowers, which exhibited a rate constant four times that of commercial Degussa P25 TiO2 nanoparticles under the UV + Vis illumination.
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Affiliation(s)
- Lu-Lu Lai
- State Key Laboratory of Silicon Materials
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Wei Wen
- College of Mechanical and Electrical Engineering
- Hainan University
- Haikou 570228
- P. R. China
| | - Jin-Ming Wu
- State Key Laboratory of Silicon Materials
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
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27
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Sun W, Liu H, Hu J, Li J. Controllable synthesis and morphology-dependent photocatalytic performance of anatase TiO2 nanoplates. RSC Adv 2015. [DOI: 10.1039/c4ra13596b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The morphology of TiO2 anatase nanoplates was controlled through tuning the ratio of HAc to DMF, reaction time and temperature. The excellent photocatalytic performance can be ascribed to the exposed {010} facet and high surface area.
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Affiliation(s)
- Wen Sun
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education
- Hubei Province
- South-Central University for Nationalities
- Wuhan 430074
- PR China
| | - Hang Liu
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education
- Hubei Province
- South-Central University for Nationalities
- Wuhan 430074
- PR China
| | - Juncheng Hu
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education
- Hubei Province
- South-Central University for Nationalities
- Wuhan 430074
- PR China
| | - Jinlin Li
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education
- Hubei Province
- South-Central University for Nationalities
- Wuhan 430074
- PR China
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28
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Ivanov VK, Fedorov PP, Baranchikov AY, Osiko VV. Oriented attachment of particles: 100 years of investigations of non-classical crystal growth. RUSSIAN CHEMICAL REVIEWS 2014. [DOI: 10.1070/rcr4453] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Wang R, Xu C, Sun J, Gao L. Three-dimensional Fe2O3 nanocubes/nitrogen-doped graphene aerogels: nucleation mechanism and lithium storage properties. Sci Rep 2014; 4:7171. [PMID: 25421070 PMCID: PMC4243062 DOI: 10.1038/srep07171] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 11/04/2014] [Indexed: 11/09/2022] Open
Abstract
We developed a solvothermal-induced self-assembly approach to construct three dimensional (3D) macroscopic Fe2O3 nanocubes/nitrogen-doped graphene (Fe2O3-NC/GN) aerogel as anode materials for lithium-ion batteries (LIBs). The Fe2O3 nanocubes with length of ~50 nm are homogeneously anchored on 3D GN frameworks and as spacers to separate the neighboring GN sheets. Based on intensively investigations on the early stages of formation process, it is discovered that a non-classical nanoparticle-mediated crystallization process and a subsequent classical ion-mediated growth dominate the nanocube formation. This is totally different from the commonly recognized classical atom-mediated crystallization and ripening mechanism. Benefitting from the unique structures and characteristics, the optimized Fe2O3-NC/GN aerogel exhibits excellent rate capability, outstanding long-term cyclic stability at high current densities, which are outperforming most of Fe2O3/GS hybrid electrodes. These results suggest us to in-depth understand the detailed crystallization process, and rational design and precisely control the morphologies of nanocrystals on graphene for high performance energy applications.
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Affiliation(s)
- Ronghua Wang
- The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding Xi Road, Shanghai 200050
| | - Chaohe Xu
- The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding Xi Road, Shanghai 200050
| | - Jing Sun
- The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding Xi Road, Shanghai 200050
| | - Lian Gao
- The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding Xi Road, Shanghai 200050
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30
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Dai H, Zhang S, Hong Z, Li X, Xu G, Lin Y, Chen G. Enhanced Photoelectrochemical Activity of a Hierarchical-Ordered TiO2 Mesocrystal and Its Sensing Application on a Carbon Nanohorn Support Scaffold. Anal Chem 2014; 86:6418-24. [DOI: 10.1021/ac500813u] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Shupei Zhang
- Ministry
of Education Key Laboratory of Analysis and Detection for Food Safety,
and Department of Chemistry, Fuzhou University, Fuzhou 350002, People’s Republic of China
| | | | | | | | | | - Guonan Chen
- Ministry
of Education Key Laboratory of Analysis and Detection for Food Safety,
and Department of Chemistry, Fuzhou University, Fuzhou 350002, People’s Republic of China
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31
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Linnikov OD. Mechanism of precipitate formation during spontaneous crystallization from supersaturated aqueous solutions. RUSSIAN CHEMICAL REVIEWS 2014. [DOI: 10.1070/rc2014v083n04abeh004399] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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32
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33
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Lv W, He W, Wang X, Niu Y, Cao H, Dickerson JH, Wang Z. Understanding the oriented-attachment growth of nanocrystals from an energy point of view: a review. NANOSCALE 2014; 6:2531-2547. [PMID: 24481078 DOI: 10.1039/c3nr04717b] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Since Penn et al. first discovered the oriented attachment growth of crystals, the oriented attachment mechanism has now become a major research focus in the crystal field, and extensive efforts have been carried out over the past decade to systematically investigate the growth mechanism and the statistical kinetic models. However, most of the work mainly focuses on the experimental results on the oriented attachment growth. In contrast to the previous reviews, our review provides an overview of the recent theoretical advances in oriented attachment kinetics combined with experimental evidences. After a brief introduction to the van der Waals interaction and Coulombic interaction in a colloidal system, the correlation between the kinetic models of oriented attachment growth and the interactions is then our focus. The impact of in situ experimental observation techniques on the study of oriented attachment growth is examined with insightful examples. In addition, the advances in theoretical simulations mainly investigating the thermodynamic origin of these interactions at the atomic level are reviewed. This review seeks to understand the oriented attachment crystal growth from a kinetic point of view and provide a quantitative methodology to rationally design an oriented attachment system with pre-evaluated crystal growth parameters.
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Affiliation(s)
- Weiqiang Lv
- School of Energy Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 611731, PR China.
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34
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Lai LL, Huang LL, Wu JM. K2TiO(C2O4)2-mediated synthesis of rutile TiO2 mesocrystals and their ability to assist photodegradation of sulfosalicylic acid in water. RSC Adv 2014. [DOI: 10.1039/c4ra09445j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Flower-like rutile TiO2 mesocrystals were synthesized by a K2TiO(C2O4)2-mediated low temperature solution route under the atmospheric pressure, which exhibited high photocatalytic activity because of the large specific surface area as well as the high charge separation rate inherent from the single crystal nature.
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Affiliation(s)
- Lu-Lu Lai
- State Key Laboratory of Silicon Materials
- Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou, P. R. China
| | - Li-Liang Huang
- State Key Laboratory of Silicon Materials
- Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou, P. R. China
| | - Jin-Ming Wu
- State Key Laboratory of Silicon Materials
- Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou, P. R. China
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35
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Stroppa DG, Montoro LA, Campello A, Gracia L, Beltrán A, Andrés J, Leite ER, Ramirez AJ. Prediction of dopant atom distribution on nanocrystals using thermodynamic arguments. Phys Chem Chem Phys 2014; 16:1089-94. [DOI: 10.1039/c3cp53427h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Abstract
Mesocrystals that consist of crystallographically aligned individual building blocks and controlled level of porosity in between exhibit unique structures and multifunctional behavior.
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Affiliation(s)
- Yanqiong Liu
- Department of Materials Science and Engineering
- Faculty of Engineering
- National University of Singapore
- Singapore 117574
| | - Yu Zhang
- Department of Materials Science and Engineering
- Faculty of Engineering
- National University of Singapore
- Singapore 117574
| | - John Wang
- Department of Materials Science and Engineering
- Faculty of Engineering
- National University of Singapore
- Singapore 117574
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37
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Uchaker E, Gu M, Zhou N, Li Y, Wang C, Cao G. Enhanced intercalation dynamics and stability of engineered micro/nano-structured electrode materials: vanadium oxide mesocrystals. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:3880-3886. [PMID: 23650258 DOI: 10.1002/smll.201203187] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 02/04/2013] [Indexed: 06/02/2023]
Abstract
An additive and template free process is developed for the facile synthesis of VO2 (B) mesocrystals via the solvothermal reaction of oxalic acid and vanadium pentoxide. The six-armed star architectures are composed of stacked nanosheets homoepitaxially oriented along the [100] crystallographic register with respect to one another, as confirmed by means of selected area electron diffraction and electron microscopy. It is proposed that the mesocrystal formation mechanism proceeds through classical as well as non-classical crystallization processes, and is possibly facilitated or promoted by the presence of a reducing/chelating agent. The synthesized VO2 (B) mesocrystals are tested as a cathodic electrode material for lithium-ion batteries, and show good capacity at discharge rates ranging from 150-1500 mA g(-1) and a cyclic stability of 195 mA h g(-1) over fifty cycles. The superb electrochemical performance of the VO2 (B) mesocrystals is attributed to the porous and oriented superstructure that ensures large surface area for redox reaction and short diffusion distances. The mesocrystalline structure ensures that all the surfaces are in intimate contact with the electrolyte, and that lithium-ion intercalation occurs uniformly throughout the entire electrode. The exposed (100) facets also lead to fast lithium intercalation, and the homoepitaxial stacking of nanosheets offers a strong inner-sheet binding force that leads to better accommodation of the strain induced during cycling, thus circumventing the capacity fading issues typically associated with VO2 (B) electrodes.
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Affiliation(s)
- Evan Uchaker
- Department of Materials Science & Engineering, University of Washington, Seattle, WA 98195, USA
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Stroppa DG, Righetto RD, Montoro LA, Houben L, Barthel J, Cordeiro MAL, Leite ER, Weng W, Kiely CJ, Ramirez AJ. Assessment of a nanocrystal 3-D morphology by the analysis of single HAADF-HRSTEM images. NANOSCALE RESEARCH LETTERS 2013; 8:475. [PMID: 24225330 PMCID: PMC3831815 DOI: 10.1186/1556-276x-8-475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 10/06/2013] [Indexed: 06/02/2023]
Abstract
This work presents the morphological characterization of CeO2 nanocrystals by the analysis of single unfiltered high-angle annular dark-field (HAADF)-high-resolution scanning transmission electron microscopy (HRSTEM) images. The thickness of each individual atomic column is estimated by the classification of its HAADF integrated intensity using a Gaussian mixture model. The resulting thickness maps obtained from two example nanocrystals with distinct morphology were analyzed with aid of the symmetry from the CeO2 crystallographic structure, providing an approximation for their 3-D morphology with high spatial resolution. A confidence level of ±1 atom per atomic column along the viewing direction on the thickness estimation is indicated by the use of multislice image simulation. The described characterization procedure stands out as a simple approach for retrieving morphological parameters of individual nanocrystals, such as volume and specific surface areas for different crystalline planes. The procedure is an alternative to the tilt-series tomography technique for a number of nanocrystalline systems, since its application does not require the acquisition of multiple images from the same nanocrystal along different zone axes.
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Affiliation(s)
- Daniel G Stroppa
- Brazilian Nanotechnology National Laboratory, Campinas, São Paulo 13083-970, Brazil
- Ernst Ruska Centre, Forschungszentrum Jülich GmbH, Jülich 52425, Germany
- Mechanical Engineering School, University of Campinas, Campinas, São Paulo 13083-860, Brazil
| | - Ricardo D Righetto
- Brazilian Nanotechnology National Laboratory, Campinas, São Paulo 13083-970, Brazil
- School of Electrical and Computer Engineering, University of Campinas, Campinas, São Paulo 13083-852, Brazil
| | - Luciano A Montoro
- Brazilian Nanotechnology National Laboratory, Campinas, São Paulo 13083-970, Brazil
| | - Lothar Houben
- Ernst Ruska Centre, Forschungszentrum Jülich GmbH, Jülich 52425, Germany
| | - Juri Barthel
- Ernst Ruska Centre, Forschungszentrum Jülich GmbH, Jülich 52425, Germany
| | - Marco AL Cordeiro
- Department of Chemistry, Federal University of São Carlos, São Carlos 13565-905, Brazil
| | - Edson R Leite
- Department of Chemistry, Federal University of São Carlos, São Carlos 13565-905, Brazil
| | - Weihao Weng
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA 18015, USA
| | - Christopher J Kiely
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA 18015, USA
| | - Antonio J Ramirez
- Brazilian Nanotechnology National Laboratory, Campinas, São Paulo 13083-970, Brazil
- Mechanical Engineering School, University of Campinas, Campinas, São Paulo 13083-860, Brazil
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Yang X, Qin J, Li Y, Zhang R, Tang H. Graphene-spindle shaped TiO₂ mesocrystal composites: facile synthesis and enhanced visible light photocatalytic performance. JOURNAL OF HAZARDOUS MATERIALS 2013; 261:342-50. [PMID: 23959254 DOI: 10.1016/j.jhazmat.2013.07.044] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 06/25/2013] [Accepted: 07/18/2013] [Indexed: 05/12/2023]
Abstract
Graphene (GR)-TiO2 mesocrystal composites were prepared by a facile template-free process based on the combination of sol-gel and solvothermal methods, and were characterized using field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Raman spectroscopy, UV-vis diffuse reflectance spectroscopy (UV-vis DRS), nitrogen absorption and electron spin resonance (ESR). Visible light photocatalytic performance of GR-TiO2 composites was evaluated for photocatalytic degradation of organic dye Rhodamine B. It was found that the amount of graphene oxide (GO) added obviously affects morphologies of TiO2 mesocrystals and photocatalytic activities of as-prepared nanocomposites. Composites prepared in the presence of different amounts of GO all exhibit higher photocatalytic activity than pure TiO2 mesocrystals and P25, the composite obtained by using 20mg GO presents the most uniform TiO2 mesocrystals in the composite and shows the highest photocatalytic efficiency. The mechanism for the generation of TiO2 mesocrystals in the GR-TiO2 composite is proposed and possible reasons for the enhancement in visible light photocatalytic efficiency are also discussed.
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Affiliation(s)
- Xiaofei Yang
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China.
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Zhou L, Chen J, Ji C, Zhou L, O'Brien P. A facile solid phase reaction to prepare TiO2 mesocrystals with exposed {001} facets and high photocatalytic activity. CrystEngComm 2013. [DOI: 10.1039/c3ce27095e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chen Q, Ma W, Chen C, Ji H, Zhao J. Anatase TiO2Mesocrystals Enclosed by (001) and (101) Facets: Synergistic Effects between Ti3+and Facets for Their Photocatalytic Performance. Chemistry 2012; 18:12584-9. [DOI: 10.1002/chem.201201178] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Indexed: 11/11/2022]
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Zhang D, Li G, Li H, Lu Y. The Development of Better Photocatalysts through Composition- and Structure-Engineering. Chem Asian J 2012; 8:26-40. [DOI: 10.1002/asia.201200123] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 06/18/2012] [Indexed: 11/09/2022]
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Hong Z, Xu Y, Liu Y, Wei M. Unique Ordered TiO2 Superstructures with Tunable Morphology and Crystalline Phase for Improved Lithium Storage Properties. Chemistry 2012; 18:10753-60. [DOI: 10.1002/chem.201200515] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Indexed: 11/09/2022]
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Inoguchi M, Afzaal M, Tanaka N, O'Brien P. The poly(ethylene glycol) assisted preparation of NH4TiOF3 mesocrystals and their topotactic conversion to TiO2. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30872j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liu Y, Zhu G, Ge B, Zhou H, Yuan A, Shen X. Concave Co3O4 octahedral mesocrystal: polymer-mediated synthesis and sensing properties. CrystEngComm 2012. [DOI: 10.1039/c2ce25788b] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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