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Shi H, Li K, Li F, Ma J, Tu Y, Long M, Lu Y, Gong W, Wang C, Shan L. Enhanced Piezoelectricity and Thermal Stability of Electrostrain Performance in BiFeO 3-Based Lead-Free Ceramics. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:942. [PMID: 36903821 PMCID: PMC10005518 DOI: 10.3390/nano13050942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/24/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
BiFeO3-based ceramics possess an advantage over large spontaneous polarization and high Curie temperature, and are thus widely explored in the field of high-temperature lead-free piezoelectrics and actuators. However, poor piezoelectricity/resistivity and thermal stability of electrostrain make them less competitive. To address this problem, (1 - x) (0.65BiFeO3-0.35BaTiO3)-xLa0.5Na0.5TiO3 (BF-BT-xLNT) systems are designed in this work. It is found that piezoelectricity is significantly improved with LNT addition, which is contributed by the phase boundary effect of rhombohedral and pseudocubic phase coexistence. The small-signal and large-signal piezoelectric coefficient (d33 and d33*) peaks at x = 0.02 with 97 pC/N and 303 pm/V, respectively. The relaxor property and resistivity are enhanced as well. This is verified by Rietveld refinement, dielectric/impedance spectroscopy and piezoelectric force microscopy (PFM) technique. Interestingly, a good thermal stability of electrostrain is obtained at x = 0.04 composition with fluctuation η = 31% (Smax'-SRTSRT×100%), in a wide temperature range of 25-180 °C, which is considered as a compromise of negative temperature dependent electrostrain for relaxors and the positive one for ferroelectric matrix. This work provides an implication for designing high-temperature piezoelectrics and stable electrostrain materials.
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Affiliation(s)
- Hongwei Shi
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
| | - Kai Li
- Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou 516001, China
| | - Feng Li
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
| | - Jianxing Ma
- Laboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, China
| | - Yubing Tu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
| | - Mingsheng Long
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
| | - Yilin Lu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
| | - Weiping Gong
- Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou 516001, China
| | - Chunchang Wang
- Laboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, China
| | - Lei Shan
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, China
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
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Cao Q, Li Q, Pi Z, Zhang J, Sun LW, Xu J, Cao Y, Cheng J, Bian Y. Metal-Organic-Framework-Derived Ball-Flower-like Porous Co 3O 4/Fe 2O 3 Heterostructure with Enhanced Visible-Light-Driven Photocatalytic Activity. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:904. [PMID: 35335718 PMCID: PMC8951189 DOI: 10.3390/nano12060904] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 03/08/2022] [Indexed: 12/22/2022]
Abstract
A porous ball-flower-like Co3O4/Fe2O3 heterostructural photocatalyst was synthesized via a facile metal-organic-framework-templated method, and showed an excellent degradation performance in the model molecule rhodamine B under visible light irradiation. This enhanced photocatalytic activity can be attributed to abundant photo-generated holes and hydroxyl radicals, and the combined effects involving a porous structure, strong visible-light absorption, and improved interfacial charge separation. It is notable that the ecotoxicity of the treated reaction solution was also evaluated, confirming that an as-synthesized Co3O4/Fe2O3 catalyst could afford the sunlight-driven long-term recyclable degradation of dye-contaminated wastewater into non-toxic and colorless wastewater.
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Affiliation(s)
- Qi Cao
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Wuxi Engineering Research Center of Taihu Lake Water Environment, Southeast University, Nanjing 210096, China; (J.Z.); (L.-W.S.); (J.X.)
| | - Qingqing Li
- Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China;
| | - Zhichao Pi
- State-Operated Wuhu Machinery Plant, Wuhu 241099, China;
| | - Jing Zhang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Wuxi Engineering Research Center of Taihu Lake Water Environment, Southeast University, Nanjing 210096, China; (J.Z.); (L.-W.S.); (J.X.)
| | - Li-Wei Sun
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Wuxi Engineering Research Center of Taihu Lake Water Environment, Southeast University, Nanjing 210096, China; (J.Z.); (L.-W.S.); (J.X.)
| | - Junzhou Xu
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Wuxi Engineering Research Center of Taihu Lake Water Environment, Southeast University, Nanjing 210096, China; (J.Z.); (L.-W.S.); (J.X.)
| | - Yunyi Cao
- Department of Intelligent Development Platform, Laundry Appliances Business Division of Midea Group, Wuxi 214028, China;
| | - Junye Cheng
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China
| | - Ye Bian
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Wuxi Engineering Research Center of Taihu Lake Water Environment, Southeast University, Nanjing 210096, China; (J.Z.); (L.-W.S.); (J.X.)
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