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Liu Y, Zhang M, Wang Z, He J, Zhang J, Ye S, Wang X, Li D, Yin H, Zhu Q, Jing H, Weng Y, Pan F, Chen R, Li C, Fan F. Bipolar charge collecting structure enables overall water splitting on ferroelectric photocatalysts. Nat Commun 2022; 13:4245. [PMID: 35869136 PMCID: PMC9307613 DOI: 10.1038/s41467-022-32002-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 07/13/2022] [Indexed: 11/09/2022] Open
Abstract
AbstractFerroelectrics are considered excellent photocatalytic candidates for solar fuel production because of the unidirectional charge separation and above-gap photovoltage. Nevertheless, the performance of ferroelectric photocatalysts is often moderate. A few studies showed that these types of photocatalysts could achieve overall water splitting. This paper proposes an approach to fabricating interfacial charge-collecting nanostructures on positive and negative domains of ferroelectric, enabling water splitting in ferroelectric photocatalysts. The present study observes efficient accumulations of photogenerated electrons and holes within their thermalization length (~50 nm) around Au nanoparticles located in the positive and negative domains of a BaTiO3 single crystal. Photocatalytic overall water splitting is observed on a ferroelectric BaTiO3 single crystal after assembling oxidation and reduction cocatalysts on the positively and negatively charged Au nanoparticles, respectively. The fabrication of bipolar charge-collecting structures on ferroelectrics to achieve overall water splitting offers a way to utilize the energetic photogenerated charges in solar energy conversion.
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Himcinschi C, Drechsler F, Walch DS, Bhatnagar A, Belik AA, Kortus J. Unexpected Phonon Behaviour in BiFe xCr 1-xO 3, a Material System Different from Its BiFeO 3 and BiCrO 3 Parents. NANOMATERIALS 2022; 12:nano12091607. [PMID: 35564316 PMCID: PMC9100047 DOI: 10.3390/nano12091607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/05/2022] [Accepted: 05/05/2022] [Indexed: 02/04/2023]
Abstract
The dielectric function and the bandgap of BiFe0.5Cr0.5O3 thin films were determined from spectroscopic ellipsometry and compared with that of the parent compounds BiFeO3 and BiCrO3. The bandgap value of BiFe0.5Cr0.5O3 is lower than that of BiFeO3 and BiCrO3, due to an optical transition at ~2.27 eV attributed to a charge transfer excitation between the Cr and Fe ions. This optical transition enables new phonon modes which have been investigated using Raman spectroscopy by employing multi-wavelengths excitation. The appearance of a new Raman mode at ~670 cm−1 with a strong intensity dependence on the excitation line and its higher order scattering activation was found for both BiFe0.5Cr0.5O3 thin films and BiFexCr1−xO3 polycrystalline bulk samples. Furthermore, Raman spectroscopy was also used to investigate temperature induced structural phase transitions in BiFe0.3Cr0.7O3.
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Affiliation(s)
- Cameliu Himcinschi
- Institute of Theoretical Physics, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; (F.D.); (J.K.)
- Correspondence:
| | - Felix Drechsler
- Institute of Theoretical Physics, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; (F.D.); (J.K.)
| | - David Sebastian Walch
- Zentrum für Innovationskompetenz SiLi-nano, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle (Saale), Germany; (D.S.W.); (A.B.)
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Akash Bhatnagar
- Zentrum für Innovationskompetenz SiLi-nano, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle (Saale), Germany; (D.S.W.); (A.B.)
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Alexei A. Belik
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Ibaraki, Tsukuba 305-0044, Japan;
| | - Jens Kortus
- Institute of Theoretical Physics, TU Bergakademie Freiberg, D-09596 Freiberg, Germany; (F.D.); (J.K.)
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Dong W, Xiao H, Jia Y, Chen L, Geng H, Bakhtiar SUH, Fu Q, Guo Y. Engineering the Defects and Microstructures in Ferroelectrics for Enhanced/Novel Properties: An Emerging Way to Cope with Energy Crisis and Environmental Pollution. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105368. [PMID: 35240724 PMCID: PMC9069204 DOI: 10.1002/advs.202105368] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 02/07/2022] [Indexed: 06/14/2023]
Abstract
In the past century, ferroelectrics are well known in electroceramics and microelectronics for their unique ferroelectric, piezoelectric, pyroelectric, and photovoltaic effects. Nowadays, the advances in understanding and tuning of these properties have greatly promoted a broader application potential especially in energy and environmental fields, by harvesting solar, mechanical, and heat energies. For example, high piezoelectricity and high pyroelectricity can be designed by defect or microstructure engineering for piezo- and pyro-catalyst, respectively. Moreover, highly piezoelectric and broadband (UV-Vis-NIR) light-responsive ferroelectrics can be designed via defect engineering, giving rise to a new concept of photoferroelectrics for efficient photocatalysis, piezocatalysis, pyrocatalysis, and related cocatalysis. This article first summarizes the recent developments in ferroelectrics in terms of piezoelectricity, pyroelectricity, and photovoltaic effects based on defect and microstructure engineering. Then, the potential applications in energy generation (i.e., photovoltaic effect, H2 generation, and self-powered multisource energy harvesting and signal sensing) and environmental protection (i.e., photo-piezo-pyro- cocatalytic dye degradation and CO2 reduction) are reviewed. Finally, the outlook and challenges are discussed. This article not only covers an overview of the state-of-art advances of ferroelectrics, but also prospects their applications in coping with energy crisis and environmental pollution.
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Affiliation(s)
- Wen Dong
- State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China
- Functional Ceramics of the Ministry of EducationSchool of Optical and Electronic Information and Engineering Research Centre & Wuhan National Lab for Optoelectronics & Optical Valley LaboratoryHuazhong University of Science and TechnologyWuhan430074China
| | - Hongyuan Xiao
- State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China
| | - Yanmin Jia
- School of ScienceXi'an University of Posts & TelecommunicationsXi'an710121China
| | - Long Chen
- Functional Ceramics of the Ministry of EducationSchool of Optical and Electronic Information and Engineering Research Centre & Wuhan National Lab for Optoelectronics & Optical Valley LaboratoryHuazhong University of Science and TechnologyWuhan430074China
| | - Huangfu Geng
- State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China
| | - Syed Ul Hasnain Bakhtiar
- Functional Ceramics of the Ministry of EducationSchool of Optical and Electronic Information and Engineering Research Centre & Wuhan National Lab for Optoelectronics & Optical Valley LaboratoryHuazhong University of Science and TechnologyWuhan430074China
| | - Qiuyun Fu
- Functional Ceramics of the Ministry of EducationSchool of Optical and Electronic Information and Engineering Research Centre & Wuhan National Lab for Optoelectronics & Optical Valley LaboratoryHuazhong University of Science and TechnologyWuhan430074China
| | - Yiping Guo
- State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China
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Chen XY, Ling SW, Xu HK, Che YD, Chen LF, Xu XF, Tang JJ, Ye JH, Ji H, Yan DL. Theoretical study on the ferroelectric and light absorption properties of Li 2SbBiO 6 for harvesting visible light. RSC Adv 2022; 12:32027-32034. [PMID: 36415548 PMCID: PMC9644050 DOI: 10.1039/d2ra05114a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 10/24/2022] [Indexed: 11/10/2022] Open
Abstract
Ferroelectric oxides with large bandgaps have restricted applications in photovoltaic and photocatalytic fields. Based on recent experiments with the ferroelectric compound, LiSbO3, the stability and optoelectronic properties of a new ferroelectric compound, namely Li2SbBiO6, are investigated in this study. The calculated results demonstrate that Li2SbBiO6 satisfies the stability conditions of the elastic coefficients and phonon dynamics. Li2SbBiO6 maintains the ferroelectric polarization strength of LiSbO3 and significantly reduces the bandgap, and thus has been explored for applications in photovoltaic and photocatalytic fields. Li2SbBiO6 is a new potential ferroelectric oxide for harvesting visible light owing to its suitable bandgap and a large hole–electron effective mass ratio. Li2SbBiO6 slightly improves the ferroelectric polarization of LiSbO3 and significantly reduces the band gap to expand its applications in photovoltaic and photocatalysis under visible light.![]()
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Affiliation(s)
- Xing-Yuan Chen
- Department of Physics, School of Science, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, PR China
| | - Shi-Wu Ling
- Department of Physics, School of Science, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, PR China
| | - Hua-Kai Xu
- Department of Physics, School of Science, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, PR China
| | - You-Da Che
- Department of Physics, School of Science, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, PR China
| | - Li-Fang Chen
- Department of Physics, School of Science, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, PR China
| | - Xiang-Fu Xu
- Department of Physics, School of Science, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, PR China
| | - Jia-Jun Tang
- School of Physics, South China University of Technology, Guangzhou 510640, PR China
| | - Jia-Hui Ye
- SINOPEC Guangzhou Branch, Guangzhou 510726, PR China
| | - Hong Ji
- Department of Physics, School of Science, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, PR China
| | - Dan-Lin Yan
- Department of Physics, School of Science, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, PR China
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Guo K, Zhang R, Fu Z, Zhang L, Wang X, Deng C. Regulation of Photovoltaic Response in ZSO-Based Multiferroic BFCO/BFCNT Heterojunction Photoelectrodes via Magnetization and Polarization. ACS APPLIED MATERIALS & INTERFACES 2021; 13:35657-35663. [PMID: 34309370 DOI: 10.1021/acsami.1c07534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Multiferroic devices have attracted renewed attention in applications of photovoltaic devices for their efficient carrier separation driven by internal polarization, magnetization, and above-bandgap generated photovoltages. In this work, Zn2SnO4-based multiferroic Bi6Fe1.6Co0.2Ni0.2Ti3O18/Bi2FeCrO6 (BFCNT/BFCO) heterojunction photoelectrodes were fabricated. Structural and optical analyses showed that the bandgap of the spinel Zn2SnO4 is ∼3.1 eV while those of Aurivillius-type BFCNT and double-perovskite BFCO are 1.62 and 1.74 eV, respectively. Under the simulated AM 1.5G illumination, the as-prepared photoelectrodes delivered a photoconversion efficiency (η) of 3.40% with a short-circuit current density (Jsc), open-circuit voltage (Voc), and fill factor (FF) of 10.3 mA·cm-2, 0.66 V, and 50.4%, respectively. Analyses of adjustment of an applied electric and magnetic field on photovoltaic properties indicated that both magnetization and polarization of multiferroics can effectively tune the built-in electric field and the transport of charge carriers, providing a new idea for the design of future high-performance multiferroic oxide photovoltaic devices.
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Affiliation(s)
- Kaixin Guo
- Key Laboratory of Electronic Composites of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Rongfen Zhang
- Key Laboratory of Electronic Composites of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Zhao Fu
- Guizhou College of Electronic Science and Technology, Guiyang 561113, Guizhou, China
| | - Liangyu Zhang
- Guizhou College of Electronic Science and Technology, Guiyang 561113, Guizhou, China
| | - Xu Wang
- Key Laboratory of Electronic Composites of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Chaoyong Deng
- Key Laboratory of Electronic Composites of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, Guizhou, China
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6
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LnFe0.5Cr0.5O3 based perovskites showing multiferroic properties and polarization induced photoelectrochemical activity. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Shah JH, Huang B, Idris AM, Liu Y, Malik AS, Hu W, Zhang Z, Han H, Li C. Regulation of Ferroelectric Polarization to Achieve Efficient Charge Separation and Transfer in Particulate RuO 2 /BiFeO 3 for High Photocatalytic Water Oxidation Activity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2003361. [PMID: 33048443 DOI: 10.1002/smll.202003361] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 09/30/2020] [Indexed: 06/11/2023]
Abstract
Exploiting spontaneous polarization of ferroelectric materials to achieve high charge separation efficiency is an intriguing but challenging research topic in solar energy conversion. This work shows that loading high work function RuO2 cocatalyst on BiFeO3 (BFO) nanoparticles enhances the intrinsic ferroelectric polarization by efficient screening of charges to RuO2 via RuO2 /BFO heterojunction. This leads to enhancement of the surface photovoltage of RuO2 /BFO single nanoparticles nearly 3 times, the driving force for charge separation and transfer in photocatalytic reactions. Consequently, efficient photocatalytic water oxidation is achieved with quantum efficiency as high as 5.36 % at 560 nm, the highest activity reported so far for ferroelectric materials. This work demonstrates that, unlike low photocurrent density in film-based ferroelectric devices, high photocatalytic activity could be achieved by regulating the ferroelectric spontaneous polarization using appropriate cocatalyst to enhance driving force for efficient separation and transfer of photogenerated charges in particulate ferroelectric semiconductor materials.
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Affiliation(s)
- Jafar H Shah
- State Key Laboratory of Catalysis & Division of Solar Energy, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Biaohong Huang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
- School of Material Science and Engineering, University of Science and Technology of China (USTC), Hefei, Anhui, 230026, China
| | - Ahmed M Idris
- State Key Laboratory of Catalysis & Division of Solar Energy, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yong Liu
- State Key Laboratory of Catalysis & Division of Solar Energy, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Anum S Malik
- State Key Laboratory of Catalysis & Division of Solar Energy, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weijin Hu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
- School of Material Science and Engineering, University of Science and Technology of China (USTC), Hefei, Anhui, 230026, China
| | - Zhidong Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
- School of Material Science and Engineering, University of Science and Technology of China (USTC), Hefei, Anhui, 230026, China
| | - Hongxian Han
- State Key Laboratory of Catalysis & Division of Solar Energy, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Can Li
- State Key Laboratory of Catalysis & Division of Solar Energy, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
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8
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Lee J, Yoon H, Choi KS, Kim S, Seo S, Song J, Choi BU, Ryu J, Ryu S, Oh J, Jeon C, Lee S. Template Engineering of CuBi 2 O 4 Single-Crystal Thin Film Photocathodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002429. [PMID: 32686276 DOI: 10.1002/smll.202002429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/07/2020] [Indexed: 06/11/2023]
Abstract
To develop strategies for efficient photo-electrochemical water-splitting, it is important to understand the fundamental properties of oxide photoelectrodes by synthesizing and investigating their single-crystal thin films. However, it is challenging to synthesize high-quality single-crystal thin films from copper-based oxide photoelectrodes due to the occurrence of significant defects such as copper or oxygen vacancies and grains. Here, the CuBi2 O4 (CBO) single-crystal thin film photocathode is achieved using a NiO template layer grown on single-crystal SrTiO3 (STO) (001) substrate via pulsed laser deposition. The NiO template layer plays a role as a buffer layer of large lattice mismatch between CBO and STO (001) substrate through domain-matching epitaxy, and forms a type-II band alignment with CBO, which prohibits the transfer of photogenerated electrons toward bottom electrode. The photocurrent densities of the CBO single-crystal thin film photocathode demonstrate -0.4 and -0.7 mA cm-2 at even 0 VRHE with no severe dark current under illumination in a 0.1 m potassium phosphate buffer solution without and with H2 O2 as an electron scavenger, respectively. The successful synthesis of high-quality CBO single-crystal thin film would be a cornerstone for the in-depth understanding of the fundamental properties of CBO toward efficient photo-electrochemical water-splitting.
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Affiliation(s)
- Jongmin Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Hongji Yoon
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Kyoung Soon Choi
- National Research Facilities and Equipment Center, Korea Basic Science Institute, Daejeon, 34133, Republic of Korea
| | - Seungkyu Kim
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Sehun Seo
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Jaesun Song
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Byeong-Uk Choi
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34113, Republic of Korea
| | - Jiseung Ryu
- Analysis Technical Center, Korea Institute of Ceramic Engineering and Technology, Jinju, Gyeongsangnam-do, 52851, Republic of Korea
| | - Sangwoo Ryu
- Department of Advanced Materials Engineering, Kyonggi University, Suwon, Gyeonggi-do, 16227, Republic of Korea
| | - Jihun Oh
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34113, Republic of Korea
- Graduate School of Energy, Environment Water and Sustainability (EEWS), Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Cheolho Jeon
- The Advanced Nano Surface Research Group, Korea Basic Science Institute, Daejeon, 34133, Republic of Korea
| | - Sanghan Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
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9
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Xie Z, Cui Z, Shi J, Lin C, Zhang K, Yuan G, Liu JM. Enhancing photoelectrochemical performance of the Bi 2MoO 6 photoanode by ferroelectric polarization regulation. NANOSCALE 2020; 12:18446-18454. [PMID: 32941571 DOI: 10.1039/d0nr02809f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Photoelectrochemical water splitting provides a promising strategy for converting solar energy into chemical fuels and has attracted extensive interest. Herein, Bi2MoO6 nanopillars with large surface areas were fabricated on an ITO-coated glass substrate and their photoelectrochemical properties are enhanced through appropriate manipulation of ferroelectric polarization. The Bi2MoO6 photoanode with polarization orientation toward ITO shows an enhanced photocurrent density of 250 μA cm-2 at 1.23 V vs. reversible hydrogen electrode, which is 28% higher than that of pristine Bi2MoO6 nanopillars without macroscopic polarization. The corresponding depolarization electric field benefits the separation of light-excited electron-hole pairs, thus minimizing the recombination of charge carriers and further enhancing the photocurrent current density. Our work offers a new strategy of Bi2MoO6-based photoelectrochemical devices with great potential of application in the conversion of solar energy into chemical fuels.
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Affiliation(s)
- Zhongshuai Xie
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
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10
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Das S, Fourmont P, Benetti D, Cloutier SG, Nechache R, Wang ZM, Rosei F. High performance BiFeO3 ferroelectric nanostructured photocathodes. J Chem Phys 2020; 153:084705. [PMID: 32872869 DOI: 10.1063/5.0013192] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Shyamashis Das
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
- Centre Énergie Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
| | - Paul Fourmont
- École de Technologie Supérieure, 1100 Notre Dame Street West, Montréal, Québec H3C 1K3, Canada
| | - Daniele Benetti
- Centre Énergie Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
| | - Sylvain G. Cloutier
- École de Technologie Supérieure, 1100 Notre Dame Street West, Montréal, Québec H3C 1K3, Canada
| | - Riad Nechache
- Centre Énergie Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
| | - Zhiming M. Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
- Institute of Micro Engineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
| | - Federico Rosei
- Centre Énergie Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
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11
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Wei L, Li C, Guo J, Guan L, Wang Y, Liu B. Giant optical absorption and ferroelectric polarization of BiCoO 2S perovskite oxysulfide by first principles prediction. Phys Chem Chem Phys 2020; 22:11382-11391. [PMID: 32374305 DOI: 10.1039/d0cp00057d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Obtaining an ideal ferroelectric photovoltaic (FE-PV) material with a narrow bandgap and a large ferroelectric polarization value can enable us to achieve great practical FE-PV performance. By the introduction of sulfur into the tetragonal BiCoO3 perovskite with a C-type antiferromagnetic ordering, it is found that the bandgap of BiCoO2S decreases significantly (about 1.2 eV) while maintaining a large polarization value (about 1.86 C m-2) that is similar to the value of 1.793 C m-2 of BiCoO3. Most noteworthy is that the optical absorption of BiCoO2S is remarkably higher than those of BiCoO3 and other FE-PV materials. The decrease of the BiCoO2S bandgap originates from the movement of Co 3d states to a low-energy position due to the reduction of the Co ionicity when the less electronegative sulfur is introduced into BiCoO3 to substitute oxygen. The narrow bandgap and the high optical absorption of the BiCoO2S films grown on different substrates are favorable for FE-PV applications. In addition, the bandgap of BiCoO2S can be modulated by the doping amount of sulfur, which can help us fabricate multilayer FE-PV devices based on different bandgaps from different layers.
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Affiliation(s)
- Lijing Wei
- Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding, 071002, P. R. China.
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12
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Vonrüti N, Aschauer U. Catalysis on oxidized ferroelectric surfaces—Epitaxially strained LaTiO2N and BaTiO3 for photocatalytic water splitting. J Chem Phys 2020; 152:024701. [DOI: 10.1063/1.5135751] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Nathalie Vonrüti
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Ulrich Aschauer
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
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13
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Huang W, Li S, Bouzidi S, Lei L, Zhang Z, Xu P, Cloutier SG, Rosei F, Nechache R. Epitaxial patterned Bi 2FeCrO 6 nanoisland arrays with room temperature multiferroic properties. NANOSCALE ADVANCES 2019; 1:2139-2145. [PMID: 36131975 PMCID: PMC9419458 DOI: 10.1039/c9na00111e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/11/2019] [Indexed: 06/15/2023]
Abstract
Epitaxial multiferroic Bi2FeCrO6 nanoisland arrays with a lateral size of ∼100 nm have been successfully fabricated by patterned SiO2 template-assisted pulsed laser deposition. The as-grown island structure exhibits promising multiferroic properties (i.e. ferroelectric and magnetic) even at nanometer dimensions at room temperature. This work demonstrates an effective strategy to fabricate high-density nonvolatile ferroelectric/multiferroic memory devices.
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Affiliation(s)
- Wei Huang
- INRS-Centre Énergie, Matériaux et Télécommunications 1650, Boulevard Lionel-Boulet Varennes Québec J3X 1S2 Canada
| | - Shun Li
- SUSTech Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology Shenzhen 518055 The People's Republic of China
- School of Environmental Science and Engineering, Southern University of Science and Technology Shenzhen 518055 The People's Republic of China
| | - Soraya Bouzidi
- École de Technologie Supérieure 1100 Rue Notre-Dame Ouest Montréal Québec H3C 1K3 Canada
| | - Lei Lei
- College of Electronic Science and Technology, Shenzhen University Nanhai Ave 3688 Shenzhen 518060 The People's Republic of China
| | - Zuotai Zhang
- School of Environmental Science and Engineering, Southern University of Science and Technology Shenzhen 518055 The People's Republic of China
| | - Ping Xu
- College of Electronic Science and Technology, Shenzhen University Nanhai Ave 3688 Shenzhen 518060 The People's Republic of China
| | - Sylvain G Cloutier
- École de Technologie Supérieure 1100 Rue Notre-Dame Ouest Montréal Québec H3C 1K3 Canada
| | - Federico Rosei
- INRS-Centre Énergie, Matériaux et Télécommunications 1650, Boulevard Lionel-Boulet Varennes Québec J3X 1S2 Canada
| | - Riad Nechache
- École de Technologie Supérieure 1100 Rue Notre-Dame Ouest Montréal Québec H3C 1K3 Canada
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14
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Huang W, Harnagea C, Tong X, Benetti D, Sun S, Chaker M, Rosei F, Nechache R. Epitaxial Bi 2FeCrO 6 Multiferroic Thin-Film Photoanodes with Ultrathin p-Type NiO Layers for Improved Solar Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2019; 11:13185-13193. [PMID: 30892871 DOI: 10.1021/acsami.8b20998] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The photoelectric properties of multiferroic double-perovskite Bi2FeCrO6 (BFCO), such as above-band gap photovoltages, switchable photocurrents, and bulk photovoltaic effects, have recently been explored for potential applications in solar technology. Here, we report the fabrication of photoelectrodes based on n-type ferroelectric (FE) semiconductor BFCO heterojunctions coated with p-type transparent conducting oxides (TCOs) by pulsed laser deposition and their application for photoelectrochemical (PEC) water oxidation. The photocatalytic properties of the bare BFCO photoanodes can be improved by controlling the FE polarization state. However, the charge recombination as well as the limited charge transfer kinetics in the photoanode/electrolyte cause major energy loss and thus hinder the PEC performance. We show that this problem may be addressed by the deposition of an ultrathin p-type NiO layer on the photoanode to enhance the charge transport kinetics and reduce charge recombination at surface-trapped states for increased surface band bending. A fourfold enhancement of photocurrent density, up to 0.4 mA cm-2 (at +1.23 V vs RHE), a best performance of stability over 4 h, and a high incident photon-to-current efficiency (∼3.7%) were achieved under 1 sun illumination in such p-NiO/n-BFCO heterojunction photoanodes. These studies reveal the optimization of PEC performance by polarization switching of BFCO and the successful achievement of p-TCOs/n-FE heterojunction photoanodes that are able to sustain water oxidation that is stable for many hours.
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Affiliation(s)
- Wei Huang
- Centre Énergie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
| | - Catalin Harnagea
- Centre Énergie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
| | - Xin Tong
- Centre Énergie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
- School of Chemistry and Materials Science , Guizhou Normal University , Guiyang 550001 , People's Republic of China
| | - Daniele Benetti
- Centre Énergie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
| | - Shuhui Sun
- Centre Énergie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
| | - Mohamed Chaker
- Centre Énergie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
| | - Federico Rosei
- Centre Énergie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
- Institute of Fundamental and Frontier Science , University of Electronic Science and Technology of China , Chengdu 610054 , People's Republic of China
| | - Riad Nechache
- École de Technologie Supérieure , 1100 Rue Notre-Dame Ouest , Montréal , Québec H3C 1K3 , Canada
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15
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Plasmonic enhanced Cu 2O-Au-BFO photocathodes for solar hydrogen production. Sci Rep 2019; 9:5140. [PMID: 30914703 PMCID: PMC6435794 DOI: 10.1038/s41598-019-41613-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 03/13/2019] [Indexed: 11/21/2022] Open
Abstract
A novel Cu2O-Au-BFO heterostructure photocathode was constructed which significantly improved the efficiency of photo-generated carrier transfer for solar hydrogen production. A BiFeO3 (BFO) ferroelectric film was synthesized on top of a Cu2O layer by a sputtering process. The BFO layer acted to protect the Cu2O layer from photochemical corrosion, increasing photoelectrochemical (PEC) stability. The p–n heterojunction between Cu2O and BFO layers enhanced the PEC properties by suppressing charge recombination and improved interfacial charge transfer efficiency. When Cu2O and BFO are interfaced by Au Nanoparticles (NPs) the PEC performance was further enhanced, due to hot-electron transfer at the plasmonic resonance. After positive poling, the depolarization field across the whole volume of BFO film drove electrons into the electrolyte solution, inducing a significant anodic shift, Vop of 1.01 V vs. RHE, together with a significantly enhanced photocurrent density of −91 μA/cm2 at 0 V vs. RHE under 100 mW/cm2 illumination. The mechanism was investigated through experimental and theoretivcal calculations.
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16
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Ferroelectric Materials: A Novel Pathway for Efficient Solar Water Splitting. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8091526] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Over the past few decades, solar water splitting has evolved into one of the most promising techniques for harvesting hydrogen using solar energy. Despite the high potential of this process for hydrogen production, many research groups have encountered significant challenges in the quest to achieve a high solar-to-hydrogen conversion efficiency. Recently, ferroelectric materials have attracted much attention as promising candidate materials for water splitting. These materials are among the best candidates for achieving water oxidation using solar energy. Moreover, their characteristics are changeable by atom substitute doping or the fabrication of a new complex structure. In this review, we describe solar water splitting technology via the solar-to-hydrogen conversion process. We will examine the challenges associated with this technology whereby ferroelectric materials are exploited to achieve a high solar-to-hydrogen conversion efficiency.
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17
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Basu K, Zhang H, Zhao H, Bhattacharya S, Navarro-Pardo F, Datta PK, Jin L, Sun S, Vetrone F, Rosei F. Highly stable photoelectrochemical cells for hydrogen production using a SnO 2-TiO 2/quantum dot heterostructured photoanode. NANOSCALE 2018; 10:15273-15284. [PMID: 30067257 DOI: 10.1039/c8nr02286k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photoelectrochemical (PEC) water splitting implementing colloidal quantum dots (QDs) as sensitizers is a promising approach for hydrogen (H2) generation, due to the QD's size-tunable optical properties. However, the challenge of long-term stability of the QDs is still unresolved. Here, we introduce a highly stable QD-based PEC device for H2 generation using a photoanode based on a SnO2-TiO2 heterostructure, sensitized by CdSe/CdS core/thick-shell "giant" QDs. This hybrid photoanode architecture leads to an appreciable saturated photocurrent density of ∼4.7 mA cm-2, retaining an unprecedented ∼96% of its initial current density after two hours, and sustaining ∼93% after five hours of continuous irradiation under an AM 1.5G (100 mW cm-2) simulated solar spectrum. Transient photoluminescence (PL) measurements demonstrate that the heterostructured SnO2-TiO2 photoanode exhibits faster electron transfer compared with the bare TiO2 photoanode. The lower electron transfer rate in the TiO2 photoanode can be attributed to slow electron kinetics in the ultraviolet regime, revealed by ultrafast transient absorption spectroscopy. Graphene microplatelets were further introduced into the heterostructured photoanode, which boosted the photocurrent density to ∼5.6 mA cm-2. Our results demonstrate that the SnO2-TiO2 heterostructured photoanode holds significant potential for developing highly stable PEC cells.
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Affiliation(s)
- Kaustubh Basu
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, Université du Québec, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada.
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18
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Huang W, Chakrabartty J, Harnagea C, Gedamu D, Ka I, Chaker M, Rosei F, Nechache R. Highly Sensitive Switchable Heterojunction Photodiode Based on Epitaxial Bi 2FeCrO 6 Multiferroic Thin Films. ACS APPLIED MATERIALS & INTERFACES 2018; 10:12790-12797. [PMID: 29565117 DOI: 10.1021/acsami.8b00459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Perovskite multiferroic oxides are promising materials for the realization of sensitive and switchable photodiodes because of their favorable band gap (<3.0 eV), high absorption coefficient, and tunable internal ferroelectric (FE) polarization. A high-speed switchable photodiode based on multiferroic Bi2FeCrO6 (BFCO)/SrRuO3 (SRO)-layered heterojunction was fabricated by pulsed laser deposition. The heterojunction photodiode exhibits a large ideality factor ( n = ∼5.0) and a response time as fast as 68 ms, thanks to the effective charge carrier transport and collection at the BFCO/SRO interface. The diode can switch direction when the electric polarization is reversed by an external voltage pulse. The time-resolved photoluminescence decay of the device measured at ∼500 nm demonstrates an ultrafast charge transfer (lifetime = ∼6.4 ns) in BFCO/SRO heteroepitaxial structures. The estimated responsivity value at 500 nm and zero bias is 0.38 mA W-1, which is so far the highest reported for any FE thin film photodiode. Our work highlights the huge potential for using multiferroic oxides to fabricate highly sensitive and switchable photodiodes.
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Affiliation(s)
- Wei Huang
- INRS-Centre Énergie, Matériaux et Télécommunications , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
| | - Joyprokash Chakrabartty
- INRS-Centre Énergie, Matériaux et Télécommunications , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
| | - Catalin Harnagea
- INRS-Centre Énergie, Matériaux et Télécommunications , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
| | - Dawit Gedamu
- École de Technologie Supérieure , 1100 Rue Notre-Dame Ouest , Montréal , Québec H3C 1K3 , Canada
| | - Ibrahima Ka
- École de Technologie Supérieure , 1100 Rue Notre-Dame Ouest , Montréal , Québec H3C 1K3 , Canada
| | - Mohamed Chaker
- INRS-Centre Énergie, Matériaux et Télécommunications , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
| | - Federico Rosei
- INRS-Centre Énergie, Matériaux et Télécommunications , 1650, Boulevard Lionel-Boulet , Varennes , Québec J3X 1S2 , Canada
- Department of Electrical Engineering, Institute for Fundamental and Frontier Science , University of Electronic Science and Technology of China , Chengdu 610054 , People's Republic of China
| | - Riad Nechache
- École de Technologie Supérieure , 1100 Rue Notre-Dame Ouest , Montréal , Québec H3C 1K3 , Canada
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19
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Bhat SSM, Jang HW. Recent Advances in Bismuth-Based Nanomaterials for Photoelectrochemical Water Splitting. CHEMSUSCHEM 2017; 10:3001-3018. [PMID: 28612464 DOI: 10.1002/cssc.201700633] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 06/11/2017] [Indexed: 06/07/2023]
Abstract
In recent years, bismuth-based nanomaterials have drawn considerable interest as potential candidates for photoelectrochemical (PEC) water splitting owing to their narrow band gaps, nontoxicity, and low costs. The unique electronic structure of bismuth-based materials with a well-dispersed valence band comprising Bi 6s and O 2p orbitals offers a suitable band gap to harvest visible light. This Review presents significant advancements in exploiting bismuth-based nanomaterials for solar water splitting. An overview of the different strategies employed and the new ideas adopted to improve the PEC performance of bismuth-based nanomaterials are discussed. Morphology control, the construction of heterojunctions, doping, and co-catalyst loading are several approaches that are implemented to improve the efficiency of solar water splitting. Key issues are identified and guidelines are suggested to rationalize the design of efficient bismuth-based materials for sunlight-driven water splitting.
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Affiliation(s)
- Swetha S M Bhat
- Department of Materials Science and Engineering, Research Institute for Advanced Materials, Seoul National University, Seoul, 151-744, Korea
| | - Ho Won Jang
- Department of Materials Science and Engineering, Research Institute for Advanced Materials, Seoul National University, Seoul, 151-744, Korea
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20
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Ren Y, Nan F, You L, Zhou Y, Wang Y, Wang J, Su X, Shen M, Fang L. Enhanced Photoelectrochemical Performance in Reduced Graphene Oxide/BiFeO 3 Heterostructures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1603457. [PMID: 28181404 DOI: 10.1002/smll.201603457] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 01/10/2017] [Indexed: 06/06/2023]
Abstract
BiFeO3 (BFO)-based ferroelectrics have been proved to be visible-light-driven photoelectrodes for O2 production. However, the hitherto reported photoelectrochemical performances remain inferior to meet the requirements for any applications. Besides, expensive noble metals (Ag, Au) are commonly required to achieve high photoelectric conversion efficiency. Here, the significant enhancements of photoelectrochemical performance is reported by fabricating a noble-metal-free reduced graphene oxide (RGO)/BFO composite film via a simple and cost-effective solution process. The optimized RGO/BFO composite film exhibits a 600% improvement of the short-circuit photocurrent density compared to that of the pristine BFO, and also outperforms the noble-metal/BFO cells under the same reaction conditions. Furthermore, the incident photon-to-current efficiency of the optimized RGO/BFO sample shows threefold enhancement. This study delivers a facile and low-cost approach to preparing 2D materials/ferroelectric heterostructures and offers a promising pathway to boost the performance of semiconducting ferroelectric photoelectrodes.
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Affiliation(s)
- Yan Ren
- College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China
| | - Feng Nan
- College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China
| | - Lu You
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Yang Zhou
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Yanyan Wang
- College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China
| | - Junling Wang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Xiaodong Su
- College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China
| | - Mingrong Shen
- College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China
| | - Liang Fang
- College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China
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21
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Zhang J, Huang Y, Jin L, Rosei F, Vetrone F, Claverie JP. Efficient Upconverting Multiferroic Core@Shell Photocatalysts: Visible-to-Near-Infrared Photon Harvesting. ACS APPLIED MATERIALS & INTERFACES 2017; 9:8142-8150. [PMID: 28212485 DOI: 10.1021/acsami.7b00158] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We report the two-step synthesis of a core@shell nanohybrid material for visible-to-near-infrared (NIR) photocatalysis. The core is constituted of NaGdF4:Er3+, Yb3+ upconverting nanoparticles (UCNPs). A bismuth ferrite (BFO) shell is assembled around the UCNPs via a hydrothermal process. The photocatalytic degradation assays of methylene orange and 4-chlorophenol reveal that these core@shell nanostructures possess remarkably enhanced reaction activity under visible and NIR irradiation, compared to the BFO powder alone and the BFO-UCNP mixture. Photo-charge scavenger tests and fluorescent assays indicate that hydroxyl radicals play a pivotal role in the photodegradation mechanism. The enhanced photoactivity of the core@shell structure is attributed to the NIR radiation which is converted into visible light by UCNPs, and which is then captured by BFO via a nonradiative luminescence resonance energy transfer process. Therefore, this core@shell architecture optimizes solar energy use by efficiently harvesting visible and NIR photons.
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Affiliation(s)
- Jianming Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University , Zhenjiang 212013, China
| | - Yue Huang
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique , 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
| | - Lei Jin
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique , 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
| | - Federico Rosei
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique , 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
- Institute for Fundamental and Frontier Science, University of Electronic Science and Technology of China , Chengdu, China
| | - Fiorenzo Vetrone
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique , 1650 Boul. Lionel Boulet, Varennes, Québec J3X 1S2, Canada
- Institute for Fundamental and Frontier Science, University of Electronic Science and Technology of China , Chengdu, China
| | - Jerome P Claverie
- Department of Chemistry, Université de Sherbrooke , Sherbrooke, Quebec J1K 2R1, Canada
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22
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Fan D, Zhu J, Wang X, Wang S, Liu Y, Chen R, Feng Z, Fan F, Li C. Dual Extraction of Photogenerated Electrons and Holes from a Ferroelectric Sr0.5Ba0.5Nb2O6 Semiconductor. ACS APPLIED MATERIALS & INTERFACES 2016; 8:13857-13864. [PMID: 27183145 DOI: 10.1021/acsami.6b00809] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The separation of photogenerated charges is a critical factor in photocatalysis. Recently, anomalous photovoltaic (APV) field effects (Voc ∼ 10(3) V/cm) in ferroelectrics, with their strong driving force for charge separation, have attracted much attention in photocatalysis and photoelectrocatalysis. However, it is still unknown whether photogenerated electrons and holes can be simultaneously extracted by the strong driving force toward the surface of ferroelectrics and can become available for surface reactions. This issue becomes critically important in photocatalysis because the surface reaction utilizes both the electrons and holes that reach the surface. In this work, a model lateral symmetric structure, metal/Sr0.5Ba0.5Nb2O6/metal (metal = Ag or Pt), as an electrode was fabricated. The dual extractions of photogenerated electrons and holes on the two opposite metal electrodes were achieved, as revealed by photovoltaic and ferroelectrical hysteresis measurements and photoassisted Kelvin probe force microscopy (KPFM). It was found that the high Schottky barriers of the two opposite Sr0.5Ba0.5Nb2O6-Pt electrodes are key factors that alter the two space charge regions (SCRs) by a poling effect. The resulting built-in electrical fields with parallel directions near both electrodes significantly enhance the charge separation ability. Our model unravels the driving force of charge separation in ferroelectric semiconductors, thus demonstrating the potential for highly efficient charge separation in photocatalysis.
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Affiliation(s)
- Dayong Fan
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy , Dalian 116023, China
- Graduate University of Chinese Academy of Sciences , Beijing 100049, China
| | - Jian Zhu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy , Dalian 116023, China
- Graduate University of Chinese Academy of Sciences , Beijing 100049, China
| | - Xiuli Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy , Dalian 116023, China
| | - Shengyang Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy , Dalian 116023, China
- Graduate University of Chinese Academy of Sciences , Beijing 100049, China
| | - Yong Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy , Dalian 116023, China
- Graduate University of Chinese Academy of Sciences , Beijing 100049, China
| | - Ruotian Chen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy , Dalian 116023, China
- Graduate University of Chinese Academy of Sciences , Beijing 100049, China
| | - Zhaochi Feng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy , Dalian 116023, China
| | - Fengtao Fan
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy , Dalian 116023, China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy , Dalian 116023, China
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