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Zhong K, Sun P, Xu H. Advances in Defect Engineering of Metal Oxides for Photocatalytic CO 2 Reduction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2310677. [PMID: 38686700 DOI: 10.1002/smll.202310677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 02/29/2024] [Indexed: 05/02/2024]
Abstract
Photocatalytic CO2 reduction technology, capable of converting low-density solar energy into high-density chemical energy, stands as a promising approach to alleviate the energy crisis and achieve carbon neutrality. Semiconductor metal oxides, characterized by their abundant reserves, good stability, and easily tunable structures, have found extensive applications in the field of photocatalysis. However, the wide bandgap inherent in metal oxides contributes to their poor efficiency in photocatalytic CO2 reduction. Defect engineering presents an effective strategy to address these challenges. This paper reviews the research progress in defect engineering to enhance the photocatalytic CO2 reduction performance of metal oxides, summarizing defect classifications, preparation methods, and characterization techniques. The focus is on defect engineering, represented by vacancies and doping, for improving the performance of metal oxide photocatalysts. This includes advancements in expanding the photoresponse range, enhancing photogenerated charge separation, and promoting CO2 molecule activation. Finally, the paper provides a summary of the current issues and challenges faced by defect engineering, along with a prospective outlook on the future development of photocatalytic CO2 reduction technology.
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Affiliation(s)
- Kang Zhong
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Peipei Sun
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Hui Xu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
- Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
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Bacha AUR, Nabi I, Chen Y, Li Z, Iqbal A, Liu W, Afridi MN, Arifeen A, Jin W, Yang L. Environmental application of perovskite material for organic pollutant-enriched wastewater treatment. Coord Chem Rev 2023; 495:215378. [DOI: 10.1016/j.ccr.2023.215378] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
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Wang Y, Wang P, Liu L, Wang Y, Zhao Y, Tian W, Liu X, Zhu F, Shi J. Defect Dipole Behaviors on the Strain Performances of Bismuth Sodium Titanate-Based Lead-Free Piezoceramics. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114008. [PMID: 37297142 DOI: 10.3390/ma16114008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 05/17/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023]
Abstract
Bismuth sodium titanate (BNT)-based, lead-free piezoelectric materials have been extensively studied due to their excellent strain characteristics and environmental friendliness. In BNTs, the large strain (S) usually requires a relatively large electric field (E) excitation, resulting in a low inverse piezoelectric coefficient d33* (S/E). Moreover, the hysteresis and fatigue of strain in these materials have also been bottlenecks impeding the applications. The current common regulation method is chemical modification, which mainly focuses on forming a solid solution near the morphotropic phase boundary (MPB) by adjusting the phase transition temperature of the materials, such as BNT-BaTiO3, BNT-Bi0.5K0.5TiO3, etc., to obtain a large strain. Additionally, the strain regulation based on the defects introduced by the acceptor, donor, or equivalent dopant or the nonstoichiometry has proven effective, but its underlying mechanism is still ambiguous. In this paper, we review the generation of strain and then discuss it from the domain, volume, and boundary effect perspectives to understand the defect dipole behavior. The asymmetric effect caused by the coupling between defect dipole polarization and ferroelectric spontaneous polarization is expounded. Moreover, the defect effect on the conductive and fatigue properties of BNT-based solid solutions is described, which will affect the strain characteristics. The optimization approach is appropriately evaluated while there are still challenges in the full understanding of the defect dipoles and their strain output, in which further efforts are needed to achieve new breakthroughs in atomic-level insight.
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Affiliation(s)
- Yiyi Wang
- School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Pu Wang
- School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Laijun Liu
- Key Laboratory of New Processing Technology for Nonferrous Metal & Materials (MOE), College of Materials Science and Engineering, Guilin University of Technology, Guilin 541006, China
| | - Yuyin Wang
- School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Yingying Zhao
- School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Wenchao Tian
- Key Laboratory of Electronic Equipment Structure Design (MOE), School of Mechano-Electronic Engineering, Xidian University, Xi'an 710071, China
| | - Xiao Liu
- School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Fangyuan Zhu
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
| | - Jing Shi
- Key Laboratory of Electronic Equipment Structure Design (MOE), School of Mechano-Electronic Engineering, Xidian University, Xi'an 710071, China
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Rosenberg E, Bauer J, Cho E, Kumar A, Pelliciari J, Occhialini CA, Ning S, Kaczmarek A, Rosenberg R, Freeland JW, Chen YC, Wang JP, LeBeau J, Comin R, de Groot FMF, Ross CA. Revealing Site Occupancy in a Complex Oxide: Terbium Iron Garnet. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2300824. [PMID: 37060220 DOI: 10.1002/smll.202300824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Indexed: 06/19/2023]
Abstract
Complex oxide films stabilized by epitaxial growth can exhibit large populations of point defects which have important effects on their properties. The site occupancy of pulsed laser-deposited epitaxial terbium iron garnet (TbIG) films with excess terbium (Tb) is analyzed, in which the terbium:iron (Tb:Fe)ratio is 0.86 compared to the stoichiometric value of 0.6. The magnetic properties of the TbIG are sensitive to site occupancy, exhibiting a higher compensation temperature (by 90 K) and a lower Curie temperature (by 40 K) than the bulk Tb3 Fe5 O12 garnet. Data derived from X-ray core-level spectroscopy, magnetometry, and molecular field coefficient modeling are consistent with occupancy of the dodecahedral sites by Tb3+ , the octahedral sites by Fe3+ , Tb3+ and vacancies, and the tetrahedral sites by Fe3+ and vacancies. Energy dispersive X-ray spectroscopy in a scanning transmission electron microscope provides direct evidence of TbFe antisites. A small fraction of Fe2+ is present, and oxygen vacancies are inferred to be present to maintain charge neutrality. Variation of the site occupancies provides a path to considerable manipulation of the magnetic properties of epitaxial iron garnet films and other complex oxides, which readily accommodate stoichiometries not found in their bulk counterparts.
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Affiliation(s)
- Ethan Rosenberg
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- 3M Corporate Research Materials Laboratory, 3M Center, St. Paul, MN, 55114, USA
| | - Jackson Bauer
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Eunsoo Cho
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Abinash Kumar
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Jonathan Pelliciari
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, United States
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Connor A Occhialini
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, United States
| | - Shuai Ning
- School of Materials Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
| | - Allison Kaczmarek
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Richard Rosenberg
- Advanced Photon Source, X-Ray Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - John W Freeland
- Advanced Photon Source, X-Ray Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Yu-Chia Chen
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota, 55455, USA
| | - Jian-Ping Wang
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota, 55455, USA
| | - James LeBeau
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Riccardo Comin
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, United States
| | - F M F de Groot
- Materials Chemistry and Catalysis, Utrecht University, Universiteitslaan 99, Utrecht, 3584 CG, Netherlands
| | - Caroline A Ross
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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Tian Y, Ma M, Li S, Dong J, Ji X, Wu H, Wang J, Jing Q. Piezoelectricity and Thermophysical Properties of Ba 0.90Ca 0.10Ti 0.96Zr 0.04O 3 Ceramics Modified with Amphoteric Nd 3+ and Y 3+ Dopants. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2369. [PMID: 36984249 PMCID: PMC10052513 DOI: 10.3390/ma16062369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/09/2023] [Accepted: 03/14/2023] [Indexed: 06/18/2023]
Abstract
Lead-free barium calcium titanate zirconate (BCTZ) ceramics doped with a single rare-earth element generally exhibit excellent piezoelectric properties. However, their electrical properties deteriorate at an excessive dopant content, limiting their application. In this study, amphoteric neodymium (Nd3+) and yttrium (Y3+)-codoped BCTZ-NYx ceramics were synthesized via a solid-state reaction at 1240 °C. The influences of the Y3+ content (x) on the structural features, electrical properties, mechanical properties, and thermophysical properties were investigated. At a small x (<0.18 mol%), Y3+ could enhance the fracture strength and electrical properties by eliminating oxygen vacancies, defect dipoles, and/or structural defects. However, the outstanding performance deteriorated with excessive x. Additionally, the mechanism of the defect chemistry at different x was deduced. At an yttrium content of 0.18 mol%, the ceramic exhibited high piezoelectricity and ferroelectricity with low domain-switching activation energy (Ea = 0.401 eV), indicating that it could replace commercial lead-based piezoelectric ceramics.
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Affiliation(s)
- Yongshang Tian
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China
| | - Mingyang Ma
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China
| | - Shuiyun Li
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China
| | - Junli Dong
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China
| | - Xiang Ji
- School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Haitao Wu
- School of Environmental and Material Engineering, Yantai University, Yantai 264005, China
| | - Jinshuang Wang
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China
| | - Qiangshan Jing
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China
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Li H, Yang Y, Deng S, Liu H, Li T, Song Y, Bai H, Zhu T, Wang J, Wang H, Guo EJ, Xing X, Xiang H, Chen J. Significantly Enhanced Room-Temperature Ferromagnetism in Multiferroic EuFeO 3-δ Thin Films. NANO LETTERS 2023; 23:1273-1279. [PMID: 36729943 DOI: 10.1021/acs.nanolett.2c04447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Regulating the magnetic properties of multiferroics lays the foundation for their prospective application in spintronic devices. Single-phase multiferroics, such as rare-earth ferrites, are promising candidates; however, they typically exhibit weak magnetism at room temperature (RT). Here, we significantly boosted the RT ferromagnetism of a representative ferrite, EuFeO3, by oxygen defect engineering. Polarized neutron reflectometry and magnetometry measurements reveal that saturation magnetization reaches 0.04 μB/Fe, which is approximately 5 times higher than its bulk phase. Combining the annular bright-field images with theoretical assessment, we unravel the underlying mechanism for magnetic enhancement, in which the decrease in Fe-O-Fe bond angles caused by oxygen vacancies (VO) strengthens magnetic interactions and tilts Fe spins. Furthermore, the internal relationship between magnetism and VO was established by illustrating how the magnetic structure and magnitude change with VO configuration and concentration. Our strategy for regulating magnetic properties can be applied to numerous functional oxide materials.
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Affiliation(s)
- Hao Li
- Beijing Advanced Innovation Center for Materials Genome Engineering and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing100083, China
| | - Yali Yang
- Key Laboratory of Computational Physical Sciences (Ministry of Education), State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai200433, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing100083, China
| | - Shiqing Deng
- Beijing Advanced Innovation Center for Materials Genome Engineering and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing100083, China
- State Key Laboratory of New Ceramic and Fine Processing, Tsinghua University, Beijing100084, China
| | - Hui Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing100083, China
| | - Tianyu Li
- Beijing Advanced Innovation Center for Materials Genome Engineering and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing100083, China
| | - Yuzhu Song
- Beijing Advanced Innovation Center for Materials Genome Engineering and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing100083, China
| | - He Bai
- Spallation Neutron Source Science Center, Dongguan523803, China
| | - Tao Zhu
- Spallation Neutron Source Science Center, Dongguan523803, China
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing100190, China
| | - Jiaou Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
| | - Huanhua Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
| | - Er-Jia Guo
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing100190, China
| | - Xianran Xing
- Beijing Advanced Innovation Center for Materials Genome Engineering and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing100083, China
| | - Hongjun Xiang
- Key Laboratory of Computational Physical Sciences (Ministry of Education), State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai200433, China
| | - Jun Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing100083, China
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Defect engineering boosts ferroelectricity in Pb0.9Ba0.1ZrO3 ceramic. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2022.06.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Irshad M, Ain QT, Zaman M, Aslam MZ, Kousar N, Asim M, Rafique M, Siraj K, Tabish AN, Usman M, Hassan Farooq MU, Assiri MA, Imran M. Photocatalysis and perovskite oxide-based materials: a remedy for a clean and sustainable future. RSC Adv 2022; 12:7009-7039. [PMID: 35424711 PMCID: PMC8982362 DOI: 10.1039/d1ra08185c] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 02/21/2022] [Indexed: 01/08/2023] Open
Abstract
The massive use of non-renewable energy resources by humankind to fulfill their energy demands is causing severe environmental issues. Photocatalysis is considered one of the potential solutions for a clean and sustainable future because of its cleanliness, inexhaustibility, efficiency, and cost-effectiveness. Significant efforts have been made to design highly proficient photocatalyst materials for various applications such as water pollutant degradation, water splitting, CO2 reduction, and nitrogen fixation. Perovskite photocatalyst materials are gained special attention due to their exceptional properties because of their flexibility in chemical composition, structure, bandgap, oxidation states, and valence states. The current review is focused on perovskite materials and their applications in photocatalysis. Special attention has been given to the structural, stoichiometric, and compositional flexibility of perovskite photocatalyst materials. The photocatalytic activity of perovskite materials in different photocatalysis applications is also discussed. Various mechanisms involved in photocatalysis application from wastewater treatment to hydrogen production are also provided. The key objective of this review is to encapsulate the role of perovskite materials in photocatalysis along with their fundamental properties to provide valuable insight for addressing future environmental challenges.
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Affiliation(s)
- Muneeb Irshad
- Department of Physics, University of Engineering and Technology Lahore 54890 Pakistan
| | - Quar Tul Ain
- Department of Physics, University of Engineering and Technology Lahore 54890 Pakistan
| | - Muhammad Zaman
- Department of Physics, University of Engineering and Technology Lahore 54890 Pakistan
| | | | - Naila Kousar
- Department of Physics, University of Engineering and Technology Lahore 54890 Pakistan
| | - Muhammad Asim
- Department of Physics, University of Engineering and Technology Lahore 54890 Pakistan
| | | | - Khurram Siraj
- Department of Physics, University of Engineering and Technology Lahore 54890 Pakistan
| | - Asif Nadeem Tabish
- Department of Chemical Engineering, University of Engineering and Technology, New Campus Lahore Pakistan
| | - Muhammad Usman
- Department of Mechanical Engineering, University of Engineering and Technology Lahore 54890 Pakistan
| | - Masood Ul Hassan Farooq
- Department of Basic Sciences, University of Engineering and Technology, New Campus Lahore Pakistan
| | - Mohammed Ali Assiri
- Department of Chemistry, Faculty of Science, Research Center for Advanced Materials Science (RCAMS), King Khalid University P. O. Box 9004 Abha 61413 Saudia Arabia
| | - Muhammad Imran
- Department of Chemistry, Faculty of Science, Research Center for Advanced Materials Science (RCAMS), King Khalid University P. O. Box 9004 Abha 61413 Saudia Arabia
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