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Aoyagi N, Motokawa R, Okumura M, Ueda Y, Saito T, Nishitsuji S, Taguchi T, Yomogida T, Sazaki G, Ikeda-Ohno A. Globular pattern formation of hierarchical ceria nanoarchitectures. Commun Chem 2024; 7:128. [PMID: 38867063 DOI: 10.1038/s42004-024-01199-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 05/13/2024] [Indexed: 06/14/2024] Open
Abstract
Dissipative structures often appear as an unstable counterpart of ordered structures owing to fluctuations that do not form a homogeneous phase. Even a multiphase mixture may simultaneously undergo one chemical reaction near equilibrium and another one that is far from equilibrium. Here, we observed in real time crystal seed formation and simultaneous nanocrystal aggregation proceeding from CeIV complexes to CeO2 nanoparticles in an acidic aqueous solution, and investigated the resultant hierarchical nanoarchitecture. The formed particles exhibited two very different size ranges, resulting in further pattern formation with opalescence. The hierarchically assembled structures in solutions were CeO2 colloids, viz. primary core clusters (1-3 nm) of crystalline ceria and secondary clusters (20-30 nm) assembled through surface ions. Such self-assembly is widespread in multi-component complex fluids, paradoxically moderating hierarchical reactions. Stability and instability are not only critical but also complementary for co-optimisation around the nearby free energy landscape prior to bifurcation.
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Affiliation(s)
- Noboru Aoyagi
- Advanced Science Research Centre (ASRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan.
| | - Ryuhei Motokawa
- Materials Sciences Research Centre (MSRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
| | - Masahiko Okumura
- Centre for Computational Science and e-Systems, JAEA, Kashiwa, Chiba, 277-0871, Japan
| | - Yuki Ueda
- Materials Sciences Research Centre (MSRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
| | - Takumi Saito
- Advanced Science Research Centre (ASRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
- Nuclear Professional School, School of Engineering, The University of Tokyo, Ibaraki, 319-1188, Japan
| | - Shotaro Nishitsuji
- Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata, 992-8510, Japan
| | - Tomitsugu Taguchi
- National Institutes for Quantum Science and Technology, Takasaki-shi, Gunma, 370-1292, Japan
| | - Takumi Yomogida
- Nuclear Science and Engineering Centre (NSEC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
| | - Gen Sazaki
- Institute of Low Temperature Science, Hokkaido University, Kita-ku, Sapporo, 060-0819, Japan
| | - Atsushi Ikeda-Ohno
- Advanced Science Research Centre (ASRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
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Palys L, Stephen D, Mao Z, Mergelsberg ST, Boglaienko D, Chen Y, Liu L, Bae Y, Jin B, Sommers JA, De Yoreo JJ, Nyman M. Cerium Nanophases from Cerium Ammonium Nitrate. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4350-4360. [PMID: 38364791 DOI: 10.1021/acs.langmuir.3c03611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
Ceria nanomaterials with facile CeIII/IV redox behavior are used in sensing, catalytic, and therapeutic applications, where inclusion of CeIII has been correlated with reactivity. Understanding assembly pathways of CeO2 nanoparticles (NC-CeO2) in water has been challenged by "blind" synthesis, including rapid assembly/precipitation promoted by heat or strong base. Here, we identify a layered phase denoted Ce-I with a proposed formula CeIV(OH)3(NO3)·xH2O (x ≈ 2.5), obtained by adding electrolytes to aqueous cerium ammonium nitrate (CAN) to force precipitation. Ce-I represents intermediate hydrolysis species between dissolved CAN and NC-CeO2, where CAN is a commonly used CeIV compound that exhibits unusual aqueous and organic solubility. Ce-I features Ce-(OH)2-Ce units, representing the first step of hydrolysis toward NC-CeO2 formation, challenging prior assertions about CeIV hydrolysis. Structure/composition of poorly crystalline Ce-I was corroborated by a pair distribution function, Ce-L3 XAS (X-ray absorption spectroscopy), compositional analysis, and 17O nuclear magnetic resonance spectroscopy. Formation of Ce-I and its transformation to NC-CeO2 is documented in solution by small-angle X-ray scattering (SAXS) and in the solid-state by transmission electron microscopy (TEM) and powder X-ray diffraction. Morphologies identified by TEM support form factor models for SAXS analysis, evidencing the incipient assembly of Ce-I. Finally, two morphologies of NC-CeO2 are identified. Sequentially, spherical NC-CeO2 particles coexist with Ce-I, and asymmetric NC-CeO2 with up to 35% CeIII forms at the expense of Ce-I, suggesting direct replacement.
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Affiliation(s)
- Lauren Palys
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Doctor Stephen
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Zhiwei Mao
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | | | - Daria Boglaienko
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Ying Chen
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Lili Liu
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Yuna Bae
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Biao Jin
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - James A Sommers
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - James J De Yoreo
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - May Nyman
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
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Prates da Costa E, Huang X, Kübel C, Cheng X, Schladitz K, Hofmann A, Göbel U, Smarsly BM. Tuning Mesopore Accessibility of Ce 0.18Zr 0.64Y 0.15La 0.03O 2-δ by Hydrothermal Post-treatment─A Case Study for Ceria-Based Oxidation Storage Materials. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 38011036 DOI: 10.1021/acs.langmuir.3c02067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
The connectivity and thermal stability of pores in heterogeneous, mesoporous metal oxide catalysts are key properties controlling their (long-term) efficacy. In this study, we investigate the influence of pH and temperature during a common hydrothermal aftertreatment step in the synthesis of mesoporous CexZr1-x-y-zYyLazO2-δ oxides obtained from molecular precursors via hydrothermal synthesis. This study has a strong focus on the methodological approach, elucidating whether and how even the smallest changes in morphology and connectivity may be unraveled and related to the underlying chemical processes to uncover key parameters for the ongoing improvement of material properties. Deep insights into the mesopore space were obtained by state-of-the-art physisorption (including hysteresis scanning), electron tomography, and small-angle X-ray scattering (SAXS) analysis. We also provide a simple tool to simulate SAXS curves from electron tomography data that allow direct comparison to experimentally obtained SAXS curves. Furthermore, the impact on surface-bound nitrate groups and the development during calcination were studied in detail by thermogravimetric analysis coupled with mass spectrometry. The key observations indicate a significant increase in thermal stability at temperatures as high as 1050 °C and improved mesopore accessibility with an increase in pH of the aftertreatment solution. The combined observations from the employed methods suggest a pH-dependent removal of surface-bound nitrate groups as well as a dissolution and reprecipitation-based fusing of the primary particles that constitute the mesopore skeleton. This transformation yields a mechanically and thermally stronger mesopore space with the capability to endure high temperatures.
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Affiliation(s)
- Eric Prates da Costa
- Institute of Physical Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, Giessen 35392, Germany
- Umicore AG & Co. KG, Rodenbacher Chaussee 4, Hanau 63457, Germany
| | - Xiaohui Huang
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen 76344, Germany
- Department of Materials and Earth Sciences, Technical University Darmstadt, Alarich-Weiss-Str. 2, Darmstadt 64287, Germany
| | - Christian Kübel
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen 76344, Germany
- Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen 76344, Germany
- Department of Materials and Earth Sciences, Technical University Darmstadt, Alarich-Weiss-Str. 2, Darmstadt 64287, Germany
| | - Xiaoyin Cheng
- Fraunhofer-Institut für Techno-und Wirtschaftsmathematik, Fraunhofer-Platz 1, Kaiserslautern 67663, Germany
| | - Katja Schladitz
- Fraunhofer-Institut für Techno-und Wirtschaftsmathematik, Fraunhofer-Platz 1, Kaiserslautern 67663, Germany
| | | | - Ulrich Göbel
- Umicore AG & Co. KG, Rodenbacher Chaussee 4, Hanau 63457, Germany
| | - Bernd M Smarsly
- Institute of Physical Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, Giessen 35392, Germany
- Center for Materials Research, Heinrich-Buff-Ring 16, Giessen 35392, Germany
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Abstract
Nucleation and growth are critical steps in crystallization, which plays an important role in determining crystal structure, size, morphology, and purity. Therefore, understanding the mechanisms of nucleation and growth is crucial to realize the controllable fabrication of crystalline products with desired and reproducible properties. Based on classical models, the initial crystal nucleus is formed by the spontaneous aggregation of ions, atoms, or molecules, and crystal growth is dependent on the monomer's diffusion and the surface reaction. Recently, numerous in situ investigations on crystallization dynamics have uncovered the existence of nonclassical mechanisms. This review provides a summary and highlights the in situ studies of crystal nucleation and growth, with a particular emphasis on the state-of-the-art research progress since the year 2016, and includes technological advances, atomic-scale observations, substrate- and temperature-dependent nucleation and growth, and the progress achieved in the various materials: metals, alloys, metallic compounds, colloids, and proteins. Finally, the forthcoming opportunities and challenges in this fascinating field are discussed.
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Affiliation(s)
- Junjie Li
- Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing100049, China
| | - Francis Leonard Deepak
- Nanostructured Materials Group, International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330Braga, Portugal
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Baranchikov AE, Razumov MI, Kameneva SV, Sozarukova MM, Beshkareva TS, Filippova AD, Kozlov DA, Ivanova OS, Shcherbakov AB, Ivanov VK. Facile Synthesis of Stable Cerium Dioxide Sols in Nonpolar Solvents. Molecules 2022; 27:5028. [PMID: 35956978 PMCID: PMC9370500 DOI: 10.3390/molecules27155028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/03/2022] [Accepted: 08/05/2022] [Indexed: 11/18/2022] Open
Abstract
A method is proposed for the preparation of stable sols of nanocrystalline cerium dioxide in nonpolar solvents, based on surface modification of CeO2 nanoparticles obtained by thermal hydrolysis of concentrated aqueous solutions of ammonium cerium(IV) nitrate with residues of 2-ethylhexanoic and octanoic acids. The synthesis was carried out at temperatures below 100 °C and did not require the use of expensive and toxic reagents. An assessment of the radical-scavenging properties of the obtained sols using the superoxide anion-radical neutralization model revealed that they demonstrate notable antioxidant activity. The results obtained indicate the potential of the nanoscale cerium dioxide sols in nonpolar solvents to be used for creating nanobiomaterials possessing antioxidant properties.
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Affiliation(s)
- Alexander E. Baranchikov
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
- Faculty of Chemistry, National Research University Higher School of Economics, 101000 Moscow, Russia
| | - Mikhail I. Razumov
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - Svetlana V. Kameneva
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - Madina M. Sozarukova
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - Tatiana S. Beshkareva
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
- Faculty of Materials Science, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Arina D. Filippova
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - Daniil A. Kozlov
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
- Faculty of Materials Science, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Olga S. Ivanova
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - Alexander B. Shcherbakov
- Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, 03680 Kyiv, Ukraine
| | - Vladimir K. Ivanov
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
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6
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Özkan E, Hofmann A, Votsmeier M, Wang W, Huang X, Kübel C, Badaczewski F, Turke K, Werner S, Smarsly BM. Comprehensive Characterization of a Mesoporous Cerium Oxide Nanomaterial with High Surface Area and High Thermal Stability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:2563-2574. [PMID: 33590755 DOI: 10.1021/acs.langmuir.0c02747] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In the present study, the pore space of a mesoporous cerium oxide material is investigated, which forms by the self-assembly of primary particles into a spherical secondary structure possessing a disordered mesopore space. The material under study exhibits quite stable mesoporosity upon aging at high temperatures (800 °C) and is, thus, of potential interest in high-temperature catalysis. Here, different characterization techniques were applied to elucidate the structural evolution taking place between heat treatment at 400 °C and aging at 800 °C, i.e., in a water-containing atmosphere, which is usually detrimental to nanoscaled porosity. The changes in the mesoporosity were monitored by advanced physisorption experiments, including hysteresis scanning, and electron tomography analysis coupled with a 3D reconstruction of the mesopore space. These methods indicate that the 3D spatial arrangement of the primary particles during the synthesis under hydrothermal conditions via thermal hydrolysis is related to the thermal stability of the hierarchical mesopore structure. The assembly of the primary CeO2 particles (∼4 nm in size) results in an interparticulate space constituting an open 3D mesopore network, as revealed by skeleton analysis of tomography data, being in conformity with hysteresis scanning. At elevated temperatures (800 °C), sinter processes occur resulting in the growth of the primary particles, but the 3D mesopore network and the spherical secondary structure are preserved.
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Affiliation(s)
- Elifkübra Özkan
- Institute of Physical Chemistry, Justus-Liebig-University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
- Umicore AG & Co. KG, Rodenbacher Chaussee 4, 63457 Hanau, Germany
| | | | - Martin Votsmeier
- Umicore AG & Co. KG, Rodenbacher Chaussee 4, 63457 Hanau, Germany
- Department of Chemistry, Technical University Darmstadt, Alarich-Weiss-Str. 8, 64287 ̈Darmstadt, Germany
| | - Wu Wang
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Xiaohui Huang
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Department of Materials and Earth Science, Technical University Darmstadt, Alarich-Weiss-Str.2, 64287 Darmstadt, Germany
| | - Christian Kübel
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Department of Materials and Earth Science, Technical University Darmstadt, Alarich-Weiss-Str.2, 64287 Darmstadt, Germany
| | - Felix Badaczewski
- Institute of Physical Chemistry, Justus-Liebig-University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
- Center for Materials Research (LaMa), Justus-Liebig-University, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
| | - Kevin Turke
- Institute of Physical Chemistry, Justus-Liebig-University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Sebastian Werner
- Institute of Physical Chemistry, Justus-Liebig-University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Bernd M Smarsly
- Institute of Physical Chemistry, Justus-Liebig-University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
- Center for Materials Research (LaMa), Justus-Liebig-University, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
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