Materials Characterization最新文献_第8页

Long-term oxidation behavior of ZrB2-SiC-B4C ceramics: Oxidation kinetics and mechanism at 1650 °C ZrB2-SiC-B4C陶瓷的长期氧化行为：1650℃氧化动力学及机理

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-09 DOI: 10.1016/j.matchar.2025.115555

Binghui Zhang , Yongsheng Liu , Yunlei Lv , Shaolin Fu , Yejie Cao

引用次数: 0

Matrix-induced Cr2CTx MXene superlattice transforming coherent M23(C1-xOx)6 solid solution reinforced high-entropy alloy composite 基体诱导的Cr2CTx MXene超晶格相变相干M23(C1-xOx)6固溶体增强高熵合金复合材料

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-09 DOI: 10.1016/j.matchar.2025.115554

Xue Li , Zhenying Huang , Hongjie Wang , Zhexuan Zhang , Wenqiang Hu , Qun Yu , Weici Zhuang , Youbo Wu , Yang Zhou , Ziqiang Zhu

{"title":"Matrix-induced Cr2CTx MXene superlattice transforming coherent M23(C1-xOx)6 solid solution reinforced high-entropy alloy composite","authors":"Xue Li , Zhenying Huang , Hongjie Wang , Zhexuan Zhang , Wenqiang Hu , Qun Yu , Weici Zhuang , Youbo Wu , Yang Zhou , Ziqiang Zhu","doi":"10.1016/j.matchar.2025.115554","DOIUrl":"10.1016/j.matchar.2025.115554","url":null,"abstract":"<div><div>High-entropy alloys (HEAs) exhibit robust strength and excellent ductility, rendering them well-suited for service as metal matrices. Adding 2D materials like MXene as reinforcements can further improve their properties. In this study, a specific HEA (AlCoCrFeNi<sub>2</sub>) was combined with Cr<sub>2</sub>CT<sub>x</sub> MXene in different amounts. When 0.5 wt% of MXene was added, the composite had a yield strength of 822 MPa and 9 % elongation. At a concentration of 1 wt%, MXene forms spherical particles within the composite, resulting in a yield strength of 1088 MPa and an elongation of 7 %. Additionally, the composite exhibits a 50 % increase in high-temperature strength at 1023 K compared to the base HEA. These spherical particles have a structure of oxygen-interstitial M<sub>23</sub>(C<sub>1-x</sub>O<sub>x</sub>)<sub>6</sub> solid solution. The study suggests that the MXene transforms into these spherical particles through an intermediate superlattice phase, which was confirmed by advanced microscopy and DFT calculations. This new composite material shows improved high-temperature strength, making it potentially useful for applications where heat and corrosion resistance are important.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115554"},"PeriodicalIF":5.5,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement the thermal stability and mechanical properties of ODS Cu alloy by forming composite oxide dispersion 通过形成复合氧化物分散体，提高ODS铜合金的热稳定性和力学性能

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-08 DOI: 10.1016/j.matchar.2025.115552

Yaju Zhou , Jingyi Zhou , Weiwei Zhang , Jianglei Fan , Shen Wu , Xiuqing Li , Shizhong Wei

{"title":"Improvement the thermal stability and mechanical properties of ODS Cu alloy by forming composite oxide dispersion","authors":"Yaju Zhou , Jingyi Zhou , Weiwei Zhang , Jianglei Fan , Shen Wu , Xiuqing Li , Shizhong Wei","doi":"10.1016/j.matchar.2025.115552","DOIUrl":"10.1016/j.matchar.2025.115552","url":null,"abstract":"<div><div>Oxide dispersion strengthened (ODS) Cu alloy is a kind of structural material with high thermal conductivity and high stability. It is promising to maintain mechanical integrity under thermal conductivity and high temperature conditions. These excellent properties are directly or indirectly attributed to the ultra-high number density of nano oxide particles, which act as a strong barrier for grain growth, dislocation slip and grain boundaries (GBs) slip. In this study, Cu-Cr-Y-Al-Ti-Si and ODS Cu-Cr-Y-Al-Ti-Si alloys were prepared by combining mechanical alloying with spark plasma sintering (SPS) technology. The influence of Cu<sub>2</sub>O on the microstructure, mechanical properties, and thermal stability of the Cu-Cr-Y-Al-Ti-Si alloy were investigated. Both alloys exhibited a heterogeneous mixture of coarse and fine grain structures. However, the addition of Cu<sub>2</sub>O led to grain refinement and the precipitation of a high density of uniformly distributed, nano-sized oxide particles throughout the copper matrix. Compared to the Cu-Cr-Y-Al-Ti-Si alloy, the ultimate tensile strength of the ODS Cu-Cr-Y-Al-Ti-Si alloy escalated from 409 MPa to 482 MPa, while the elongation slightly decreased from 17.2 % to 15.2 %. The ODS Cu-Cr-Y-Al-Ti-Si alloy also demonstrates a room temperature thermal conductivity equivalent to 62.8 % of pure copper, and exhibits ultra-high microstructural stability after annealing at 600 °C for 100 h. The outstanding strength, ductility and high-temperature stability are primarily owing to the coherent nano-sized Y-X-O (X = Al, Ti, Si) particles dispersed in the ultra-fine grain copper matrix. These findings indicate that by integrating component design and process optimization, it is possible to effectively and efficiently produce ODS Cu-Cr-Y-Al-Ti-Si alloy, which holds promising application prospects in structural materials for nuclear fusion reactors.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115552"},"PeriodicalIF":5.5,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controllable design of multi-shell hollow Co3O4/graphite nanosheets composite with broadband microwave absorption performance 具有宽带微波吸收性能的多壳空心Co3O4/石墨纳米片复合材料的可控设计

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-08 DOI: 10.1016/j.matchar.2025.115543

Yuanyuan Ma , Yingkun Yang , Guoqin Chen , Chunyu Wang , Pingping Wang , Zengyan Wei , Puzhen Shao , Bo Zhong , Long Xia , Gaohui Wu

{"title":"Controllable design of multi-shell hollow Co3O4/graphite nanosheets composite with broadband microwave absorption performance","authors":"Yuanyuan Ma , Yingkun Yang , Guoqin Chen , Chunyu Wang , Pingping Wang , Zengyan Wei , Puzhen Shao , Bo Zhong , Long Xia , Gaohui Wu","doi":"10.1016/j.matchar.2025.115543","DOIUrl":"10.1016/j.matchar.2025.115543","url":null,"abstract":"<div><div>In the pursuit of high-performance electromagnetic wave (EMW) absorbing materials, achieving both strong absorption and broad bandwidth remains a significant challenge. The reasonable and effective design of special microstructures is a crucial aspect for achieving efficient microwave absorption performance in electromagnetic wave absorbing materials. This study presents a breakthrough by designing a novel multi-shell hollow Co₃O₄/graphite nanosheets (ms-Co₃O₄/GNs) composite integrated with dielectric MoS₂ layers via a precise-regulated solvent thermal bonding annealing method, which demonstrates exceptional microwave absorption properties. The optimized MoS<sub>2</sub>/Co<sub>3</sub>O<sub>4</sub>/GNs composites exhibit superior electromagnetic wave absorption properties with a remarkable minimum reflection loss of −49.3 dB at an ultrathin thickness of 1.5 mm. Furthermore, the composite achieves an ultra-wide effective absorption bandwidth (EAB, RL ≤ −10 dB) of 4.96 GHz at just 1.8 mm, covering critical frequency ranges for 5G and radar applications. The superior wave-absorbing properties primarily stems from its unique multi-shell hollow structure, abundant heterogeneous interfaces, and the optimized, nearly perfect impedance matching characteristics. This work not only advances the development of Co₃O₄-based absorbers but also provides a generalizable strategy for designing lightweight, broadband, and high-strength EMW absorption materials through intelligent microstructure engineering.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115543"},"PeriodicalIF":5.5,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deformation and amorphization evolution mechanisms in boron-rich boron carbide under quasi-static loading 准静态加载下富硼碳化硼的变形与非晶化演化机制

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-08 DOI: 10.1016/j.matchar.2025.115546

Tian Tian , Yunwei Shi , Qianglong He , Weimin Wang

{"title":"Deformation and amorphization evolution mechanisms in boron-rich boron carbide under quasi-static loading","authors":"Tian Tian , Yunwei Shi , Qianglong He , Weimin Wang","doi":"10.1016/j.matchar.2025.115546","DOIUrl":"10.1016/j.matchar.2025.115546","url":null,"abstract":"<div><div>The inhomogeneous collapse of the periodic crystal structure of boron carbide at high values of shear stress leads to amorphization, resulting in loss of strength and toughness. Doping amorphous boron into boron carbide to replace the C atoms in the boron carbide icosahedron is believed to be effective in retarding the amorphization in boron carbide. In this study, boron carbides with stoichiometric amounts of B<sub>4.2</sub>C, B<sub>6.1</sub>C, and B<sub>8.6</sub>C were prepared through hot pressing. Raman spectroscopy was employed for the microstructure characterisation of the amorphization intensity in the indented regions of the three types of boron carbides under multiple quasi-static Vickers loads. Boron-rich boron carbide undergoes lattice expansion in the presence of a solid solution of excessive amounts of boron, forming a plastic region with many plane defects, thereby inhibiting the amorphization of the boron carbide and changing its deformation mechanism. The dislocations and stacking faults that occur in boron-rich boron carbide would promote the formation of extremely narrow linear and sharp type amorphous shear bands, which would inhibit the formation of broad amorphous bands.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115546"},"PeriodicalIF":5.5,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compositional and structural evolution advance thermoelectric performance of copper sulfides 硫化铜的组成和结构演化促进了其热电性能的提高

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-07 DOI: 10.1016/j.matchar.2025.115541

Tian-Yu Yang , Yi-Ming Zhang , Chong-Yu Wang , Yi-Xin Zhang , Zhen-Hua Ge

{"title":"Compositional and structural evolution advance thermoelectric performance of copper sulfides","authors":"Tian-Yu Yang , Yi-Ming Zhang , Chong-Yu Wang , Yi-Xin Zhang , Zhen-Hua Ge","doi":"10.1016/j.matchar.2025.115541","DOIUrl":"10.1016/j.matchar.2025.115541","url":null,"abstract":"<div><div>The thermoelectric (TE) performance of copper sulfides relies on the phase structure, which is sensitive to the synthesis conditions and composition. To date, precisely adjusting the phase structure of copper sulfides is still a challenge. Herein, a novel path to regulate the phase structure and composition while introducing multiscale precipitates is proposed. This approach is effective in optimizing the electrical and thermal transport properties of copper sulfide-based composites. BFe was introduced into the Cu<sub>1.8</sub>S material, and B atoms occupied the interstitial sites of the matrix, decreasing the solid solubility of Fe in copper sulfide. Then, the electron probe microanalysis (EPMA) and transmission electronic microscopy (TEM) Fe atoms partially consumed Cu and S to form multiscale Cu<sub>5</sub>FeS<sub>4</sub> precipitates. The carrier concentration of the bulk composites was tuned by compositional variation, resulting in an improved Seebeck coefficient. The existence of multiscale precipitates, phase interfaces, dislocations and point defects scatter all-scale phonons, and the thermal conductivity of the samples was maintained at about 0.35 W m<sup>−1</sup> K<sup>−1</sup> throughout the entire temperature range. Ultimately, a peak ZT value of 1.13 was realized at 773 K for the Cu<sub>1.8</sub>S + 1.25 <em>wt</em>% BFe sample, which was a 130 % increase over that of the pure sample of ∼0.49. This study proposes a route to realize compositional and structural evolution for enhancing thermoelectric performance, which might be useful in other systems.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115541"},"PeriodicalIF":5.5,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dislocation-mediated rejuvenation of deformation energy in a novel nickel-based single crystal superalloy 一种新型镍基单晶高温合金中位错介导的变形能回春

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-07 DOI: 10.1016/j.matchar.2025.115523

Sen Liu , Xianjue Ye , Yuefei Zhang , Xinbao Zhao , Ze Zhang

{"title":"Dislocation-mediated rejuvenation of deformation energy in a novel nickel-based single crystal superalloy","authors":"Sen Liu , Xianjue Ye , Yuefei Zhang , Xinbao Zhao , Ze Zhang","doi":"10.1016/j.matchar.2025.115523","DOIUrl":"10.1016/j.matchar.2025.115523","url":null,"abstract":"<div><div>Recrystallization in Ni-based single crystal superalloys (NiSXs) frequently occurs during manufacturing or transportation, posing challenges to ensuring the integrity and performance of turbine components. In this study, we propose an efficient rejuvenation protocol for a fourth-generation Ni-based single crystal superalloy following deformation. By gradually increasing the temperature to just below the sub-solidus temperature and applying annealing, we effectively suppress the occurrence of recrystallization. Experimental evidence demonstrates that partial dissolution of γ' precipitates broadens the γ channels, promoting interface migration and facilitating dislocation annihilation. This approach reduces the driving force for recrystallization and helps preserve the single-crystal structure of the superalloy after solution treatment. Molecular dynamics (MD) simulations are employed to analyze the deformation and recovery mechanisms; results show that increased deformation leads to a significant rise in dislocation density. The simulations further reveal that superalloys with wider γ channels exhibit enhanced coordinated deformation capability, attributed to the reduced obstruction to dislocation motion imparted by these wider channels. This study elucidates the effectiveness of the proposed rejuvenation protocol and offers valuable insights for the maintenance and longevity of single-crystal turbine blades.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115523"},"PeriodicalIF":5.5,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced Cu0.5-xZnxMg0.5Fe₂O₄/CeO₂/ZnFe₂O₄ nanocomposites: From structural integrity to energy and biomedical functionality 先进的Cu0.5-xZnxMg0.5Fe₂O₄/ ceo2 /ZnFe₂O₄纳米复合材料：从结构完整性到能源和生物医学功能

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-06 DOI: 10.1016/j.matchar.2025.115547

Ala Manohar , Thirukachhi Suvarna , S.V. Prabhakar Vattikuti , Panchanathan Manivasagan , Eue-Soon Jang , Amjad A. Almunyif , Ki Hyeon Kim

{"title":"Advanced Cu0.5-xZnxMg0.5Fe₂O₄/CeO₂/ZnFe₂O₄ nanocomposites: From structural integrity to energy and biomedical functionality","authors":"Ala Manohar , Thirukachhi Suvarna , S.V. Prabhakar Vattikuti , Panchanathan Manivasagan , Eue-Soon Jang , Amjad A. Almunyif , Ki Hyeon Kim","doi":"10.1016/j.matchar.2025.115547","DOIUrl":"10.1016/j.matchar.2025.115547","url":null,"abstract":"<div><div>This study presents the synthesis and thorough characterization of a series of novel nanocomposites, Cu<sub>0.5-x</sub>Zn<sub>x</sub>Mg<sub>0.5</sub>Fe₂O₄ (x = 0.1–0.3)/CeO₂/ZnFe₂O₄, designated as ZCMF@ZC1, ZCMF@ZC2, and ZCMF@ZC3. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HR-TEM) analyses confirmed the crystalline structures and the successful incorporation of the different phases. Morphological studies using field emission scanning electron microscopy (FESEM) and TEM revealed uniformly distributed nanoparticles with sizes in the range of 11–15 nm. Elemental analysis through energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) verified the composition and indicated the presence of mixed oxidation states among the constituent elements. Fourier transform infrared (FTIR) spectroscopy identified characteristic metal–oxide bonds. Brunauer–Emmett–Teller (BET) measurements showed mesoporous features, with specific surface areas between 8.7 and 11 m<sup>2</sup>/g. Magnetic measurements demonstrated superparamagnetic behavior across all samples, with ZCMF@ZC2 exhibiting the highest saturation magnetization (Ms) of 25.91 emu/g. Electrochemical testing, including cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD), revealed prominent pseudocapacitive behavior, with ZCMF@ZC2 achieving a maximum specific capacitance (Cs) of 340 F/g at 1 A/g and excellent rate capability. Biocompatibility assessments, performed using MTT and live/dead cell assays, confirmed that all composites maintained cell viability above 80 %. These findings highlight the promising potential of synthesized nanocomposites for applications in both energy storage devices and biomedical fields.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115547"},"PeriodicalIF":5.5,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear ultrasonic evaluation and simulation of precipitation coherence change in thermal aging damage of P91 P91热老化损伤中沉淀相干性变化的非线性超声评价与模拟

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-05 DOI: 10.1016/j.matchar.2025.115550

Jinchuan Shen , Yang Zheng , Sujun Li , Wujun Zhu , Xingquan Shen , Jinjie Zhou , Jingui Yu , Wenying Yue

{"title":"Nonlinear ultrasonic evaluation and simulation of precipitation coherence change in thermal aging damage of P91","authors":"Jinchuan Shen , Yang Zheng , Sujun Li , Wujun Zhu , Xingquan Shen , Jinjie Zhou , Jingui Yu , Wenying Yue","doi":"10.1016/j.matchar.2025.115550","DOIUrl":"10.1016/j.matchar.2025.115550","url":null,"abstract":"<div><div>The thermal aging damage of P91 steel was assessed using nonlinear ultrasonic detection technology. Acoustic nonlinear parameters demonstrate high sensitivity to thermal aging damage. The variation in acoustic nonlinearity during the early thermal aging period results from the interplay between a reduction in dislocation density and the coarsening of carbide precipitation. In the late thermal aging period, a loss of precipitation coherence leads to a reduction in acoustic nonlinear parameters. Based on the existing prediction model, dynamic mismatch parameters are added, and the precipitation size distribution is coupled with the corresponding mismatch parameters. This model effectively captures the contributions of both the precipitation size distribution and coherence variations to acoustic nonlinearity. Based on the molecular dynamic method, the contribution of precipitation coherence to acoustic nonlinearity is explored from a microscopic perspective. Both experimental and simulation studies demonstrate the potential of nonlinear ultrasonic detection technology for detecting changes in precipitation coherence.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115550"},"PeriodicalIF":5.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

External field induced piezo-photocatalytic hydrogen evolution for BiFeO3@CdS heterojunction BiFeO3@CdS异质结外场诱导压电光催化析氢

IF 5.5 2区材料科学

Materials Characterization Pub Date : 2025-09-05 DOI: 10.1016/j.matchar.2025.115544

Zongzhi Yue, Ze Wu, Jinwei Zhang, Dapeng Hong, Yanyang Zhang, Lianwei Shan

{"title":"External field induced piezo-photocatalytic hydrogen evolution for BiFeO3@CdS heterojunction","authors":"Zongzhi Yue, Ze Wu, Jinwei Zhang, Dapeng Hong, Yanyang Zhang, Lianwei Shan","doi":"10.1016/j.matchar.2025.115544","DOIUrl":"10.1016/j.matchar.2025.115544","url":null,"abstract":"<div><div>In this work, we synthesized S-type BiFeO<sub>3</sub>@CdS heterojunction piezo-photocatalysts through an innovative core-shell structure design. Their efficient hydrogen evolution performances were systematically investigated under the synergistic effect of ultrasound and visible light irradiation. The core-shell-structured BiFeO<sub>3</sub>@CdS-1 exhibits a remarkable piezo-photocatalytic hydrogen evolution rate of 1704 μmol g<sup>−1</sup> within 4 h, which is 4.19 and 8.52 times higher than those achieved under sole light irradiation and piezoelectric conditions, respectively. Comprehensive characterizations (XPS, SPV, and electrochemical analyses etc) confirm the formation of efficient charge transfer channels at the heterojunction interface, thereby promoting the spatial separation of electron-hole pairs. By combining density functional theory (DFT) calculations, we demonstrate that the piezoelectricity-induced built-in electric field and the interfacial electric field of the heterojunction significantly reduces the energy barrier for the hydrogen evolution reaction and enhanced carrier separation efficiency. This work presents a novel strategy for designing highly efficient and stable hydrogen evolution catalysts through the integration of interface engineering and piezo-photocatalysis.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115544"},"PeriodicalIF":5.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0