Pub Date : 2024-12-27DOI: 10.1016/j.jmat.2024.100999
Yameng Jiao , Caixiang Xiao , Qingliang Shen , Xuemin Yin , Shouyang Zhang , Wei Li , Chuanyun Wang , Hejun Li , Qiang Song
The mechanics of structural ceramics, especially the toughness, are crucial to their service reliability and need to be continuously optimized. Inspired by the “brick-mortar” structure and further adjusting the microstructure of “mortar” on the interface, ceramic with strength and toughness up to 444.16 MPa and 13.79 MPa⋅m1/2 is constructed by hot pressed sintering with alumina (Al2O3) as brick and vertical graphene (VG) with active atomic edges as mortar. Relying on the covalent interface between VG grown in-situ and Al2O3, the sliding of Al2O3 links the shear-deformation process of the crosslinked and interlocked nanointerface formed by VG, making the VG-enhanced Al2O3 ceramics (AVG) obtain super toughness. Moreover, the structure of interlocked VG-nanointerface exhibits an excellent high-temperature resistance, which makes AVG still show the excellent strength of 437.66 MPa and toughness of 11.16 MPa⋅m1/2 after heat treatment at 1500 °C for 100 h and they are respective 2.51 times and 3.18 times higher than Al2O3 in the same condition. This work provides a new thought for the preparation of high-strength, ultra-tough and high-temperature mechanical stable ceramics.
{"title":"3D crosslinked and interlocked graphene nanointerface enables ultra-tough and strong alumina","authors":"Yameng Jiao , Caixiang Xiao , Qingliang Shen , Xuemin Yin , Shouyang Zhang , Wei Li , Chuanyun Wang , Hejun Li , Qiang Song","doi":"10.1016/j.jmat.2024.100999","DOIUrl":"10.1016/j.jmat.2024.100999","url":null,"abstract":"<div><div>The mechanics of structural ceramics, especially the toughness, are crucial to their service reliability and need to be continuously optimized. Inspired by the “brick-mortar” structure and further adjusting the microstructure of “mortar” on the interface, ceramic with strength and toughness up to 444.16 MPa and 13.79 MPa⋅m<sup>1/2</sup> is constructed by hot pressed sintering with alumina (Al<sub>2</sub>O<sub>3</sub>) as brick and vertical graphene (VG) with active atomic edges as mortar. Relying on the covalent interface between VG grown <em>in-situ</em> and Al<sub>2</sub>O<sub>3</sub>, the sliding of Al<sub>2</sub>O<sub>3</sub> links the shear-deformation process of the crosslinked and interlocked nanointerface formed by VG, making the VG-enhanced Al<sub>2</sub>O<sub>3</sub> ceramics (AVG) obtain super toughness. Moreover, the structure of interlocked VG-nanointerface exhibits an excellent high-temperature resistance, which makes AVG still show the excellent strength of 437.66 MPa and toughness of 11.16 MPa⋅m<sup>1/2</sup> after heat treatment at 1500 °C for 100 h and they are respective 2.51 times and 3.18 times higher than Al<sub>2</sub>O<sub>3</sub> in the same condition. This work provides a new thought for the preparation of high-strength, ultra-tough and high-temperature mechanical stable ceramics.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 5","pages":"Article 100999"},"PeriodicalIF":8.4,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142887789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-24DOI: 10.1016/j.jmat.2024.100998
Xifeng Hou , Chenbin Ai , Songyu Yang , Jianjun Zhang , Yanfeng Zhang , Jingze Liu
S-scheme heterojunction has garnered significant interest owing to its distinctive band structure and interfacial interaction. In this work, nanosheets-like Bi2O2S0.8F0.4/BiOBr heterojunction photocatalyst with dual surface oxygen vacancies was synthesized by epitaxial growing method. The experiment results revealed that the evolution rate of CO from CO2 photoreduction for optimal Bi2O2S0.8F0.4/BiOBr heterojunction was 219.3 μmol⸱g−1⸱h−1, being 9.8 times greater than that of pure BiOBr. The S-scheme band structure was shown to promote sunlight utilization, raise the reduction power of photogenerated electrons, and improve the separation and transfer of photogenerated charge carriers. Moreover, the presence of dual oxygen vacancies on the interfacial surface of Bi2O2S0.8F0.4/BiOBr heterojunction facilitates the adsorption and activation of CO2 and H2O molecules. The work focuses on the combined impact of the S-scheme band structure and oxygen vacancy on the property of photocatalytic reduction of CO2. The study presents a straightforward strategy for the on-site creation of S-scheme heterojunction with defect.
S - scheme异质结由于其独特的能带结构和界面相互作用而引起了人们的极大兴趣。本文采用外延生长法合成了具有双表面氧空位的Bi2O2S0.8F0.4 /BiOBr异质结光催化剂。实验结果表明，最优Bi2O2S0.8F0.4/BiOBr异质结中CO2光还原CO的演化速率为219.3 μmol⸱g-1⸱h-1，是纯BiOBr的9.8倍。S - scheme能带结构促进了光能的利用，提高了光生电子的还原能力，并改善了光生载流子的分离和转移。此外，Bi2O2S0.8F0.4/BiOBr异质结界面表面存在双氧空位，有利于CO2和H2O分子的吸附和活化。研究了S - scheme能带结构和氧空位对CO2光催化还原性能的综合影响。该研究提出了一种直接的方法，可以在现场制造S型异质结缺陷。
{"title":"Design of double oxygen vacancy-rich Bi2O2S0.8F0.4/BiOBr S-scheme heterojunction via tuning band structure for CO2 photoreduction","authors":"Xifeng Hou , Chenbin Ai , Songyu Yang , Jianjun Zhang , Yanfeng Zhang , Jingze Liu","doi":"10.1016/j.jmat.2024.100998","DOIUrl":"10.1016/j.jmat.2024.100998","url":null,"abstract":"<div><div>S-scheme heterojunction has garnered significant interest owing to its distinctive band structure and interfacial interaction. In this work, nanosheets-like Bi<sub>2</sub>O<sub>2</sub>S<sub>0.8</sub>F<sub>0.4</sub>/BiOBr heterojunction photocatalyst with dual surface oxygen vacancies was synthesized by epitaxial growing method. The experiment results revealed that the evolution rate of CO from CO<sub>2</sub> photoreduction for optimal Bi<sub>2</sub>O<sub>2</sub>S<sub>0.8</sub>F<sub>0.4</sub>/BiOBr heterojunction was 219.3 μmol⸱g<sup>−1</sup>⸱h<sup>−1</sup>, being 9.8 times greater than that of pure BiOBr. The S-scheme band structure was shown to promote sunlight utilization, raise the reduction power of photogenerated electrons, and improve the separation and transfer of photogenerated charge carriers. Moreover, the presence of dual oxygen vacancies on the interfacial surface of Bi<sub>2</sub>O<sub>2</sub>S<sub>0.8</sub>F<sub>0.4</sub>/BiOBr heterojunction facilitates the adsorption and activation of CO<sub>2</sub> and H<sub>2</sub>O molecules. The work focuses on the combined impact of the S-scheme band structure and oxygen vacancy on the property of photocatalytic reduction of CO<sub>2</sub>. The study presents a straightforward strategy for the on-site creation of S-scheme heterojunction with defect.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100998"},"PeriodicalIF":8.4,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142884264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-22DOI: 10.1016/j.jmat.2024.100997
Yanfang Tao , Sujuan Zhang , Jinfeng Zhang , Zhongliao Wang , Gaoli Chen , Xiuzhen Zheng , Shifu Chen
The theory of S-scheme transfer mechanism have significant implications for exploring the mechanism of photocatalytic carrier migration and its intrinsic dynamics. Modeled NiWO4/CdS heterojunction photocatalyst (referred to as NWO/CS) was synthesized using a simple hydrothermal method and applied for alcohol oxidation coupled with H2 production. Systematically investigates the factors contributing to its enhanced performance and the internal charge transfer mechanisms. The 28% NWO/CS composite exhibited the highest activity, with a H2 production and the aldehyde generation rates of 16.08 mmol⋅g−1⋅h−1 and 16.88 mmol⋅g−1⋅h−1, which are about 320 times higher than those of NiWO4 (0.05 mmol⋅g−1⋅h−1 and 0.06 mmol⋅g−1⋅h−1) and 16 times higher than that of CdS (1.09 mmol⋅g−1⋅h−1 and 1.12 mmol⋅g−1⋅h−1). Based on the in-situ XPS, transient surface photovoltage, theoretical calculations, and other physicochemical characterization results, we have confirmed that the built-in electric field formed at the interface and the transfer of photogenerated charges follows the S-scheme mechanism between relative “n-NiWO4” and relative “p-CdS” are the key factors that promote efficient charge separation and significantly enhance the subsequent reaction activity. This work provides a theoretical basis for improving photocatalytic performance and understanding photocatalytic mechanisms.
{"title":"Efficient visible-light-driven alcohol oxidation coupled hydrogen production on 0D/0D “n-NiWO4/p-CdS” S-scheme heterojunction","authors":"Yanfang Tao , Sujuan Zhang , Jinfeng Zhang , Zhongliao Wang , Gaoli Chen , Xiuzhen Zheng , Shifu Chen","doi":"10.1016/j.jmat.2024.100997","DOIUrl":"10.1016/j.jmat.2024.100997","url":null,"abstract":"<div><div>The theory of S-scheme transfer mechanism have significant implications for exploring the mechanism of photocatalytic carrier migration and its intrinsic dynamics. Modeled NiWO<sub>4</sub>/CdS heterojunction photocatalyst (referred to as NWO/CS) was synthesized using a simple hydrothermal method and applied for alcohol oxidation coupled with H<sub>2</sub> production. Systematically investigates the factors contributing to its enhanced performance and the internal charge transfer mechanisms. The 28% NWO/CS composite exhibited the highest activity, with a H<sub>2</sub> production and the aldehyde generation rates of 16.08 mmol⋅g<sup>−1</sup>⋅h<sup>−1</sup> and 16.88 mmol⋅g<sup>−1</sup>⋅h<sup>−1</sup>, which are about 320 times higher than those of NiWO<sub>4</sub> (0.05 mmol⋅g<sup>−1</sup>⋅h<sup>−1</sup> and 0.06 mmol⋅g<sup>−1</sup>⋅h<sup>−1</sup>) and 16 times higher than that of CdS (1.09 mmol⋅g<sup>−1</sup>⋅h<sup>−1</sup> and 1.12 mmol⋅g<sup>−1</sup>⋅h<sup>−1</sup>). Based on the <em>in-situ</em> XPS, transient surface photovoltage, theoretical calculations, and other physicochemical characterization results, we have confirmed that the built-in electric field formed at the interface and the transfer of photogenerated charges follows the S-scheme mechanism between relative “n-NiWO<sub>4</sub>” and relative “p-CdS” are the key factors that promote efficient charge separation and significantly enhance the subsequent reaction activity. This work provides a theoretical basis for improving photocatalytic performance and understanding photocatalytic mechanisms.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100997"},"PeriodicalIF":8.4,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-19DOI: 10.1016/j.jmat.2024.100996
Hui Yang , Zhongliao Wang , Jinfeng Zhang , Kai Dai , Jingxiang Low
Coupling bulk and interface electric field for enhancing photogenerated charge carrier separation represents an effective strategy toward enhancing photocatalytic performance due to the potential of superposition of electric field. However, the detailed mechanism of synergistic effect of the bulk and interface electric field in facilitating photogenerated charge carrier remains underexplored, limiting its wide applications. Herein, we integrate the bulk electric field of Bi2MoO6 (BMO) with interface electric field (IEF) of S-scheme heterojunction formed between BMO and Bi19Br3S27 (BBS) for enhancing photocatalytic performance. The two electric fields can not only superimpose for amplifying electric field strengths, but also act as the funnel for guiding photogenerated charge carrier migration towards specific regions for redox reactions. Moreover, the MoS bonds formed between BMO and BBS act as a channel for charge transfer, accelerating the charge transfer of the S-scheme and achieving effective charge separation. As a proof-of-concept, we employ optimized BMO/BBS S-scheme heterojunction for photocatalytic CO2 conversion, reaching about 32.4 times and 2.0 times to that of pristine BMO and unmodulated BMO/BBS for CO production. This method of promoting the IEF by coupling bulk and interface electric field provides new insights into the construction of S-scheme heterojunctions for photocatalysis.
{"title":"Superposition of bulk and interface electric field for boosting charge transfer in Bi2MoO6/Bi19Br3S27 S-scheme heterojunctions","authors":"Hui Yang , Zhongliao Wang , Jinfeng Zhang , Kai Dai , Jingxiang Low","doi":"10.1016/j.jmat.2024.100996","DOIUrl":"10.1016/j.jmat.2024.100996","url":null,"abstract":"<div><div>Coupling bulk and interface electric field for enhancing photogenerated charge carrier separation represents an effective strategy toward enhancing photocatalytic performance due to the potential of superposition of electric field. However, the detailed mechanism of synergistic effect of the bulk and interface electric field in facilitating photogenerated charge carrier remains underexplored, limiting its wide applications. Herein, we integrate the bulk electric field of Bi<sub>2</sub>MoO<sub>6</sub> (BMO) with interface electric field (IEF) of S-scheme heterojunction formed between BMO and Bi<sub>19</sub>Br<sub>3</sub>S<sub>27</sub> (BBS) for enhancing photocatalytic performance. The two electric fields can not only superimpose for amplifying electric field strengths, but also act as the funnel for guiding photogenerated charge carrier migration towards specific regions for redox reactions. Moreover, the Mo<img>S bonds formed between BMO and BBS act as a channel for charge transfer, accelerating the charge transfer of the S-scheme and achieving effective charge separation. As a proof-of-concept, we employ optimized BMO/BBS S-scheme heterojunction for photocatalytic CO<sub>2</sub> conversion, reaching about 32.4 times and 2.0 times to that of pristine BMO and unmodulated BMO/BBS for CO production. This method of promoting the IEF by coupling bulk and interface electric field provides new insights into the construction of S-scheme heterojunctions for photocatalysis.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100996"},"PeriodicalIF":8.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-16DOI: 10.1016/j.jmat.2024.100995
Yuqing Sun , Zhihao Li , Yujie Zong , Fulong Liu , Hongxiang Wang , Hui Sun , Chunlei Wang , Hongchao Wang
The intrinsic low lattice thermal conductivities originates from the complex anion bonding environment make quaternary chalcogenides potential thermoelectric materials. Here, the bonding environment of Se atom in Cu2.1Mn0.9SnSe4 is further regulated by substituting Mn2+ with equimolar pairing elements (Ag+ and In3+). The increase in both bond length and angle, together with the reduction in bond strength of AgSe and InSe bonds, cause the doped samples to display strong anharmonicities (γ ∼ 1.84–2.04). And the weakened bond strength also lower the sound velocities. Consequently, the κL of the doped samples is effectively constrained, achieving a minimum value of 0.55 W⸱m−1⸱K−1 at 673 K in x = 0.10 sample. Ultimately, a zT value of 0.53 at 673 K is attained in x = 0.10 sample. The modification of bonding environment around anion is considered as an effective mean to optimize the thermoelectric performance of quaternary chalcogenides.
{"title":"Tuning the bonding environment of Se atom in Cu2MnSnSe4-based alloys for raised thermoelectric performance","authors":"Yuqing Sun , Zhihao Li , Yujie Zong , Fulong Liu , Hongxiang Wang , Hui Sun , Chunlei Wang , Hongchao Wang","doi":"10.1016/j.jmat.2024.100995","DOIUrl":"10.1016/j.jmat.2024.100995","url":null,"abstract":"<div><div>The intrinsic low lattice thermal conductivities originates from the complex anion bonding environment make quaternary chalcogenides potential thermoelectric materials. Here, the bonding environment of Se atom in Cu<sub>2.1</sub>Mn<sub>0.9</sub>SnSe<sub>4</sub> is further regulated by substituting Mn<sup>2+</sup> with equimolar pairing elements (Ag<sup>+</sup> and In<sup>3+</sup>). The increase in both bond length and angle, together with the reduction in bond strength of Ag<img>Se and In<img>Se bonds, cause the doped samples to display strong anharmonicities (<em>γ</em> ∼ 1.84–2.04). And the weakened bond strength also lower the sound velocities. Consequently, the <em>κ</em><sub>L</sub> of the doped samples is effectively constrained, achieving a minimum value of 0.55 W⸱m<sup>−1</sup>⸱K<sup>−1</sup> at 673 K in <em>x</em> = 0.10 sample. Ultimately, a <em>zT</em> value of 0.53 at 673 K is attained in <em>x</em> = 0.10 sample. The modification of bonding environment around anion is considered as an effective mean to optimize the thermoelectric performance of quaternary chalcogenides.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100995"},"PeriodicalIF":8.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Spontaneous nucleation of SiC particles and giant macroscopic steps result in the surface roughness of the grown crystal for the top-seeded solution growth of SiC crystal. To suppress the surface roughness, the temperature gradient was carefully adjusted by changing the relative position of the crucible and induction coils. The numerical simulation and experimental results show that the surface morphology of the grown crystal becomes smoother and there are fewer spontaneous nucleation particles attached to the growth surface with the decrease in the relative crucible position, due to the increase of temperature at the entire solution surface and the reducing of temperature gradient near the growth surface. Accordingly, a lower temperature gradient, a larger solution velocity, a higher carbon concentration, and a smaller carbon supersaturation near the growth surface can be obtained when the relative position between the crucible and the induction coil is 70 mm, which is demonstrated to be the most favorable for the elimination of spontaneous nucleation of small SiC particles and suppressing surface roughening with the full width at half maximum (FWHM) of 37.5 arcsec of 4H-SiC crystals.
{"title":"Suppression of the surface roughness by adjusting the temperature distribution in the top-seeded solution growth of SiC crystal.","authors":"Mengyu Li, Yuhui Liu, Xiaofang Qi, Wencheng Ma, Yongkuan Xu, Zhanggui Hu, Yicheng Wu","doi":"10.1016/j.jmat.2024.100994","DOIUrl":"https://doi.org/10.1016/j.jmat.2024.100994","url":null,"abstract":"Spontaneous nucleation of SiC particles and giant macroscopic steps result in the surface roughness of the grown crystal for the top-seeded solution growth of SiC crystal. To suppress the surface roughness, the temperature gradient was carefully adjusted by changing the relative position of the crucible and induction coils. The numerical simulation and experimental results show that the surface morphology of the grown crystal becomes smoother and there are fewer spontaneous nucleation particles attached to the growth surface with the decrease in the relative crucible position, due to the increase of temperature at the entire solution surface and the reducing of temperature gradient near the growth surface. Accordingly, a lower temperature gradient, a larger solution velocity, a higher carbon concentration, and a smaller carbon supersaturation near the growth surface can be obtained when the relative position between the crucible and the induction coil is 70 mm, which is demonstrated to be the most favorable for the elimination of spontaneous nucleation of small SiC particles and suppressing surface roughening with the full width at half maximum (FWHM) of 37.5 arcsec of 4H-SiC crystals.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"12 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-15DOI: 10.1016/j.jmat.2024.100992
Lei Jiang , Tingting Shao , Xinran Yang , Juan Xiong , Yongming Hu , Zhao Wang , Haoshuang Gu , John Wang
One-dimensional (1D) nanostructures of perovskite piezoelectrics exhibit unique properties that distinct them from those of their bulk and thin-film counterparts. These 1D nanostructures feature cantilever-like flexibility and elasticity, a relatively high piezoelectric constant, good stability and easiness of integration, making them highly promising for applications in energy harvesting, pressure sensing, piezo-catalysis, nano-actuators and smart human-machine interfaces. Among them, (K,Na)NbO3 (KNN) has been regarded as one of the most promising lead-free perovskite piezoelectrics owing to its excellent biocompatibility, good piezoelectric performance, and high Curie temperature. Recently, significant efforts have been made to develop high-performance 1D KNN nanostructures (1D KNNs). However, the controllable growth and enhancement in piezoelectric performance of 1D KNNs remain challenging. In this work, we systematically re-examine the effective approaches for the growth of 1D KNNs and explore their unique properties. Key strategies for structural designs and performance optimization are proposed based on the recent progress, along with perspectives in developing novel functionalities and micro/nano-devices such as energy harvesters, information storage, electronic skins, biomedical applications.
{"title":"One-dimensional potassium sodium niobates (1D KNN): Performance optimization and application prospects","authors":"Lei Jiang , Tingting Shao , Xinran Yang , Juan Xiong , Yongming Hu , Zhao Wang , Haoshuang Gu , John Wang","doi":"10.1016/j.jmat.2024.100992","DOIUrl":"10.1016/j.jmat.2024.100992","url":null,"abstract":"<div><div>One-dimensional (1D) nanostructures of perovskite piezoelectrics exhibit unique properties that distinct them from those of their bulk and thin-film counterparts. These 1D nanostructures feature cantilever-like flexibility and elasticity, a relatively high piezoelectric constant, good stability and easiness of integration, making them highly promising for applications in energy harvesting, pressure sensing, piezo-catalysis, nano-actuators and smart human-machine interfaces. Among them, (K,Na)NbO<sub>3</sub> (KNN) has been regarded as one of the most promising lead-free perovskite piezoelectrics owing to its excellent biocompatibility, good piezoelectric performance, and high Curie temperature. Recently, significant efforts have been made to develop high-performance 1D KNN nanostructures (1D KNNs). However, the controllable growth and enhancement in piezoelectric performance of 1D KNNs remain challenging. In this work, we systematically re-examine the effective approaches for the growth of 1D KNNs and explore their unique properties. Key strategies for structural designs and performance optimization are proposed based on the recent progress, along with perspectives in developing novel functionalities and micro/nano-devices such as energy harvesters, information storage, electronic skins, biomedical applications.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 5","pages":"Article 100992"},"PeriodicalIF":8.4,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-15DOI: 10.1016/j.jmat.2024.100993
Zhichao Gong , Haojie Yue , Kailing Fang , Kun Guo , Kang Li , Chong Guo , Huacheng Zhang , Ziliang Deng , Zhiyong Liu , Bing Xie , Pu Mao , Jinshan Lu , Shifeng Guo , Kui Yao , Francis Eng Hock Tay
Against the backdrop of increasing miniaturization and integration of electronic components, the demand for materials with multifunctionality has increased significantly. Among these, transparent fluorescent ferroelectric ceramics exhibiting ferroelectricity, optical transparency, and photoluminescence (PL) have garnered significant attention. However, an interdependent relationship exists in a ferroelectric material among polarization, transparency, and photoluminescence, which presents a challenge for optimizing the coupling of optoelectronic properties. In this work, the doping concentration of Er3+ in 0.825(K0.5Na0.5)NbO3-0.175Sr(Sc0.5Nb0.5)O3: x%Er (x = 0–0.15) system was modulated by first-principle calculations through compositional design and performance-influencing-factor-analysis strategies. The experimental results showed that grain size of the ceramic was reduced to 28 μm at x = 0.05, concentration of vacancy defects in the lattice was low, and band gap value was increased to 3.105 eV. The multifunctional ceramic, while maintaining an excellent recoverable energy storage density (Wrec = 2.03 J/cm3) and energy storage efficiency (η = 75.67%), demonstrated a 56% (1100 nm) good near-infrared transmittance and upconversion photoluminescence properties at 527, 549 nm, and 667 nm exhibiting weak green, strong green, and weak red light, respectively. This study provides a theoretical foundation and new approach for realizing the multifunctionality of photoelectric couple by introducing rare earth elements as luminescent centers into ferroelectric ceramics.
{"title":"Multifunctional energy storage and photoluminescence of Er-modified KNN-based transparent ferroelectric ceramics","authors":"Zhichao Gong , Haojie Yue , Kailing Fang , Kun Guo , Kang Li , Chong Guo , Huacheng Zhang , Ziliang Deng , Zhiyong Liu , Bing Xie , Pu Mao , Jinshan Lu , Shifeng Guo , Kui Yao , Francis Eng Hock Tay","doi":"10.1016/j.jmat.2024.100993","DOIUrl":"10.1016/j.jmat.2024.100993","url":null,"abstract":"<div><div>Against the backdrop of increasing miniaturization and integration of electronic components, the demand for materials with multifunctionality has increased significantly. Among these, transparent fluorescent ferroelectric ceramics exhibiting ferroelectricity, optical transparency, and photoluminescence (PL) have garnered significant attention. However, an interdependent relationship exists in a ferroelectric material among polarization, transparency, and photoluminescence, which presents a challenge for optimizing the coupling of optoelectronic properties. In this work, the doping concentration of Er<sup>3+</sup> in 0.825(K<sub>0.5</sub>Na<sub>0.5</sub>)NbO<sub>3</sub>-0.175Sr(Sc<sub>0.5</sub>Nb<sub>0.5</sub>)O<sub>3</sub>: <em>x</em>%Er (<em>x</em> = 0–0.15) system was modulated by first-principle calculations through compositional design and performance-influencing-factor-analysis strategies. The experimental results showed that grain size of the ceramic was reduced to 28 μm at <em>x</em> = 0.05, concentration of vacancy defects in the lattice was low, and band gap value was increased to 3.105 eV. The multifunctional ceramic, while maintaining an excellent recoverable energy storage density (<em>W</em><sub>rec</sub> = 2.03 J/cm<sup>3</sup>) and energy storage efficiency (<em>η</em> = 75.67%), demonstrated a 56% (1100 nm) good near-infrared transmittance and upconversion photoluminescence properties at 527, 549 nm, and 667 nm exhibiting weak green, strong green, and weak red light, respectively. This study provides a theoretical foundation and new approach for realizing the multifunctionality of photoelectric couple by introducing rare earth elements as luminescent centers into ferroelectric ceramics.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100993"},"PeriodicalIF":8.4,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-15DOI: 10.1016/j.jmat.2024.100991
Lingfei Lv, Xiaoming Yang, Hongjiang Wu, Rongbing Su, Zujian Wang, Bin Su, Pai Shan, Bingxuan Li, Xifa Long, Ge Zhang, Feng Xu, Chao He
Electro-optical materials are crucial for lasers and modulators applications. Perovskite ferroelectric crystals, characterized by oxygen octahedrons and superior dipole migration capabilities, are recognized for their high electro-optic coefficients. However, the application of perovskite ferroelectric crystals is often limited by reduced optical transparency, which results from light scattering and reflection at domain walls. In this study, we implemented a structure dimensionality reduction strategy to successfully transform a three-dimensional structure KNbO3 (KNO) crystal into a quasi-two-dimensional layered structure K3Nb3B2O12 (KNBO) crystal through BO3 planar groups. This modification restricts the mobility of B-site ions within the layers while preserving significant spontaneous polarization along the interlayer direction, thus converting multipolar axis into a unipolar axis in the ferroelectric. This alteration in the direction of spontaneous polarization modifies the domain structure, thereby minimizing the scattering effects of the domain walls. As a result, the KNBO crystal exhibits a large effective electro-optic (EO) coefficient of 50.14 pm/V and a high transmittance exceeding 80% in the 330 nm to 2500 nm wavelength range. These properties surpass those of currently available commercial EO crystals. This research establishes a model for enhancing transparency and EO coefficient through structural design, offering potential applications to other EO crystals.
{"title":"A new-type electro-optic crystal: K3Nb3B2O12","authors":"Lingfei Lv, Xiaoming Yang, Hongjiang Wu, Rongbing Su, Zujian Wang, Bin Su, Pai Shan, Bingxuan Li, Xifa Long, Ge Zhang, Feng Xu, Chao He","doi":"10.1016/j.jmat.2024.100991","DOIUrl":"https://doi.org/10.1016/j.jmat.2024.100991","url":null,"abstract":"Electro-optical materials are crucial for lasers and modulators applications. Perovskite ferroelectric crystals, characterized by oxygen octahedrons and superior dipole migration capabilities, are recognized for their high electro-optic coefficients. However, the application of perovskite ferroelectric crystals is often limited by reduced optical transparency, which results from light scattering and reflection at domain walls. In this study, we implemented a structure dimensionality reduction strategy to successfully transform a three-dimensional structure KNbO<sub>3</sub> (KNO) crystal into a quasi-two-dimensional layered structure K<sub>3</sub>Nb<sub>3</sub>B<sub>2</sub>O<sub>12</sub> (KNBO) crystal through BO<sub>3</sub> planar groups. This modification restricts the mobility of B-site ions within the layers while preserving significant spontaneous polarization along the interlayer direction, thus converting multipolar axis into a unipolar axis in the ferroelectric. This alteration in the direction of spontaneous polarization modifies the domain structure, thereby minimizing the scattering effects of the domain walls. As a result, the KNBO crystal exhibits a large effective electro-optic (EO) coefficient of 50.14 pm/V and a high transmittance exceeding 80% in the 330 nm to 2500 nm wavelength range. These properties surpass those of currently available commercial EO crystals. This research establishes a model for enhancing transparency and EO coefficient through structural design, offering potential applications to other EO crystals.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-14DOI: 10.1016/j.jmat.2024.100990
Changbai Long , Anwei Xu , Ziqian Su , Wei Ren , Laijun Liu , Xiangdong Ding
Aurivillius phase CaBi2Nb2O9 (CBNO) ceramic with an ultrahigh Curie temperature (TC) of ∼934 °C shows huge potential in high-temperature piezoelectric applications. However, low piezoelectricity and poor electric insulation prevent its applications in high-temperature sensing. Here, we propose an effective multi-field coupling strategy to synergistically optimize piezoelectric property, electrical conduction behavior and temperature stability of CBNO ceramic. The constructed lattice stress and electric fields induced by introducing Li/Pr and Bi/Sc doping have great impacts on the lattice structure, microstructure, domain structure and defect chemistry. Therefore, a significant increase in piezoelectric activity (d33) is resulted from the enhancement of polarization, the improvement of breakdown electric field and the production of nanoscale domains. In especial, the existence of pseudo-tetragonal phase boundary is helpful for the enhanced d33. In the designed Ca1–3x (Li0.5Pr0.5)xBi2+2xNb2–xScxO9 system, a high d33 of ∼18.2 pC/N accompanied by an ultrahigh TC of ∼938 °C is achieved in the x = 0.02 ceramic. This combined with high electrical resistivity (ρ∼1.72 MΩ⋅cm at 600 °C) and nearly stable d33 (up to 800 °C) indicates that it is a very promising piezoelectric material for high-temperature (up to 600 °C or higher) sensing applications.
{"title":"Achieving outstanding comprehensive performance with high piezoelectricity in CaBi2Nb2O9-based high-temperature piezoelectric ceramics via multi-field coupling strategy","authors":"Changbai Long , Anwei Xu , Ziqian Su , Wei Ren , Laijun Liu , Xiangdong Ding","doi":"10.1016/j.jmat.2024.100990","DOIUrl":"10.1016/j.jmat.2024.100990","url":null,"abstract":"<div><div>Aurivillius phase CaBi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> (CBNO) ceramic with an ultrahigh Curie temperature (<em>T</em><sub>C</sub>) of ∼934 °C shows huge potential in high-temperature piezoelectric applications. However, low piezoelectricity and poor electric insulation prevent its applications in high-temperature sensing. Here, we propose an effective multi-field coupling strategy to synergistically optimize piezoelectric property, electrical conduction behavior and temperature stability of CBNO ceramic. The constructed lattice stress and electric fields induced by introducing Li/Pr and Bi/Sc doping have great impacts on the lattice structure, microstructure, domain structure and defect chemistry. Therefore, a significant increase in piezoelectric activity (<em>d</em><sub>33</sub>) is resulted from the enhancement of polarization, the improvement of breakdown electric field and the production of nanoscale domains. In especial, the existence of pseudo-tetragonal phase boundary is helpful for the enhanced <em>d</em><sub>33</sub>. In the designed Ca<sub>1–3<em>x</em></sub> (Li<sub>0.5</sub>Pr<sub>0.5</sub>)<sub><em>x</em></sub>Bi<sub>2+2<em>x</em></sub>Nb<sub>2–<em>x</em></sub>Sc<sub><em>x</em></sub>O<sub>9</sub> system, a high <em>d</em><sub>33</sub> of ∼18.2 pC/N accompanied by an ultrahigh <em>T</em><sub>C</sub> of ∼938 °C is achieved in the <em>x</em> = 0.02 ceramic. This combined with high electrical resistivity (<em>ρ</em>∼1.72 MΩ⋅cm at 600 °C) and nearly stable <em>d</em><sub>33</sub> (up to 800 °C) indicates that it is a very promising piezoelectric material for high-temperature (up to 600 °C or higher) sensing applications.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 5","pages":"Article 100990"},"PeriodicalIF":8.4,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142820678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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