Journal of Materiomics最新文献_第4页

Simultaneously achieving high-κ and strong ferroelectricity in Hf0.5Zr0.5O2 thin film by structural stacking design 通过结构叠层设计，在Hf0.5Zr0.5O2薄膜中同时实现高κ和强铁电性

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2025-01-10 DOI: 10.1016/j.jmat.2025.101016

Yuchen Wang , Jiachen Li , Hansheng Zhu , Haifeng Bu , Xinzhe Du , Shengchun Shen , Yuewei Yin , Xiaoguang Li

{"title":"Simultaneously achieving high-κ and strong ferroelectricity in Hf0.5Zr0.5O2 thin film by structural stacking design","authors":"Yuchen Wang , Jiachen Li , Hansheng Zhu , Haifeng Bu , Xinzhe Du , Shengchun Shen , Yuewei Yin , Xiaoguang Li","doi":"10.1016/j.jmat.2025.101016","DOIUrl":"10.1016/j.jmat.2025.101016","url":null,"abstract":"<div><div>The superior dielectric and ferroelectric properties of HfO2-based thin films, coupled with excellent silicon compatibility, position them as highly attractive candidates for dynamic and ferroelectric random-access memories (DRAM and FeRAM). However, simultaneously achieving high dielectric constant (κ) and strong ferroelectricity in HfO2-based films presents a challenge, as high-κ and ferroelectricity are associated with the tetragonal and orthorhombic phases, respectively. In this study, we report both the good ferroelectric and dielectric properties obtained in W/Hf0.5Zr0.5O2 (HZO ∼6.5 nm)/W with morphotropic phase boundary structure by optimizing stacking sequence of HfO2 and ZrO2 sublayers. Notably, by alternating stacking of 1-cycle HfO2 with 1-cycle ZrO2 sublayers ((1–HfO2)/(1–ZrO2)), high-κ (>50) and large polarization (2Pr > 40 μC/cm2, after wake-up) can be achieved. Besides, the (1–HfO2)/(1–ZrO2) stacking configuration presents better thermal stability compared to other stacking sequences. Furthermore, the incorporation of an Al2O3 layer leads to a low leakage current density (<10−7 A/cm2 at 0.65 V) and high dielectric endurance over 1013 cycles (operating voltage ∼0.5 V). A low equivalent oxide thickness (EOT ∼0.53 nm) and considerable polarization with low leakage are simultaneously achieved. These results highlight the potential of HfO2-based films with optimized structural stacking as a trade-off approach for integrating DRAM and FeRAM on one-chip.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 5","pages":"Article 101016"},"PeriodicalIF":8.4,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940165","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}

引用次数: 0

Mesoscale mechanisms of the diffuse dielectric behaviour and retention of the polar nano-regions in the polycrystalline ferroelectric BaTiO3 多晶铁电BaTiO3中扩散介电行为和极性纳米区保留的中尺度机制

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2025-01-08 DOI: 10.1016/j.jmat.2025.101014

Lyubov Gimadeeva , Andrei Ushakov , Alexey Pugachev , Anton Turygin , Ruiyi Jing , Qingyuan Hu , Xiaoyong Wei , Zimeng Hu , Vladimir Shur , Li Jin , Denis Alikin

{"title":"Mesoscale mechanisms of the diffuse dielectric behaviour and retention of the polar nano-regions in the polycrystalline ferroelectric BaTiO3","authors":"Lyubov Gimadeeva , Andrei Ushakov , Alexey Pugachev , Anton Turygin , Ruiyi Jing , Qingyuan Hu , Xiaoyong Wei , Zimeng Hu , Vladimir Shur , Li Jin , Denis Alikin","doi":"10.1016/j.jmat.2025.101014","DOIUrl":"10.1016/j.jmat.2025.101014","url":null,"abstract":"<div><div>Barium titanate is a classical ferroelectric material that exhibits a jump-like behavior in the order parameter, spontaneous polarization, near the temperature of its transition to the paraelectric phase. This serves as a textbook example of a first-order phase transition, marked by the coexistence of polar and non-polar phase regions. Despite compelling evidence of the gradual phase transformation across Curie temperature (TC) and partial retention of ferroelectric properties above TC, the microscopic mechanisms of the phase retention remain unclear. Current study explains temperature anomalies in the macroscopic characteristics of polycrystalline barium titanate by employing complementary macroscopic and local techniques. Our findings reveal that retention of the polar phase regions is driven by the charged defects, which act as the origin of the spatially non-uniform internal electric fields. The insights from this research offer a deeper understanding of the fundamental mechanisms governing ferroelectric behavior and open new possibilities for tailoring materials with phase coexistence for a wide range of technological applications.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 5","pages":"Article 101014"},"PeriodicalIF":8.4,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937066","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}

引用次数: 0

Piezoelectric neuron for neuromorphic computing 用于神经形态计算的压电神经元

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2025-01-04 DOI: 10.1016/j.jmat.2025.101013

Wenjie Li , Shan Tan , Zhen Fan , Zhiwei Chen , Jiali Ou , Kun Liu , Ruiqiang Tao , Guo Tian , Minghui Qin , Min Zeng , Xubing Lu , Guofu Zhou , Xingsen Gao , Jun-Ming Liu

{"title":"Piezoelectric neuron for neuromorphic computing","authors":"Wenjie Li , Shan Tan , Zhen Fan , Zhiwei Chen , Jiali Ou , Kun Liu , Ruiqiang Tao , Guo Tian , Minghui Qin , Min Zeng , Xubing Lu , Guofu Zhou , Xingsen Gao , Jun-Ming Liu","doi":"10.1016/j.jmat.2025.101013","DOIUrl":"10.1016/j.jmat.2025.101013","url":null,"abstract":"<div><div>Neuromorphic computing has attracted great attention for its massive parallelism and high energy efficiency. As the fundamental components of neuromorphic computing systems, artificial neurons play a key role in information processing. However, the development of artificial neurons that can simultaneously incorporate low hardware overhead, high reliability, high speed, and low energy consumption remains a challenge. To address this challenge, we propose and demonstrate a piezoelectric neuron with a simple circuit structure, consisting of a piezoelectric cantilever, a parallel capacitor, and a series resistor. It operates through the synergy between the converse piezoelectric effect and the capacitive charging/discharging. Thanks to this efficient and robust mechanism, the piezoelectric neuron not only implements critical leaky integrate-and-fire functions (including leaky integration, threshold-driven spiking, all-or-nothing response, refractory period, strength-modulated firing frequency, and spatiotemporal integration), but also demonstrates small cycle-to-cycle and device-to-device variations (∼1.9% and ∼10.0%, respectively), high endurance (1010), high speed (integration/firing: ∼9.6/∼0.4 μs), and low energy consumption (∼13.4 nJ/spike). Furthermore, spiking neural networks based on piezoelectric neurons are constructed, showing capabilities to implement both supervised and unsupervised learning. This study therefore opens up a new way to develop high-performance artificial neurons by using piezoelectrics, which may facilitate the realization of advanced neuromorphic computing systems.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 5","pages":"Article 101013"},"PeriodicalIF":8.4,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142924677","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}

引用次数: 0

π–π interactions enable in-situ exfoliation of BN nanoflakes for high-performance thermal interface materials π -π相互作用使高性能热界面材料的氮化硼纳米片的原位脱落

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2025-01-04 DOI: 10.1016/j.jmat.2025.101011

Mingming Sheng , Junbin Lu , Hongyu Gong , Jincheng Yu , Jianqiang Bi , Weibin Zhang , Guowen Chen , Jianxin Li , Jie Jing , Yujun Zhang

{"title":"π–π interactions enable in-situ exfoliation of BN nanoflakes for high-performance thermal interface materials","authors":"Mingming Sheng , Junbin Lu , Hongyu Gong , Jincheng Yu , Jianqiang Bi , Weibin Zhang , Guowen Chen , Jianxin Li , Jie Jing , Yujun Zhang","doi":"10.1016/j.jmat.2025.101011","DOIUrl":"10.1016/j.jmat.2025.101011","url":null,"abstract":"<div><div>Boron nitride nanoflakes (BNNF) are rendered as ideal thermal conductivity fillers for thermal interface materials (TIMs) due to their ultrahigh thermal conductivity (TC) and superior electronic insulation. However, it is difficult to guarantee the high yield of well dispersed BNNF in the polymer matrix for industrial production. Herein, we propose a novel “in-situ exfoliation” strategy to fabricate the thin BNNF via chemical bonding engineering. By enhancing the π–π stacking between the inclusion and matrix, the average thickness of the BN is efficiently reduced during the three-roll mixing process. The as-prepared BNNF composite presents ultrahigh in-plane TC (10.58 W·m−1·K−1) with 49.5% (in mass) BN loading at 100 parts per hundreds of rubber (phr) with simultaneously enhanced flexibility. Notably, the tensile strength, the initial thermal decomposition temperatures (T5%) and elongation at break of the composite can reach 4.94 MPa, 470.6 °C and 98%, respectively. Our LED chip cooling tests validate the outstanding heat dissipation ability of the composites for TIM applications. Furthermore, this strategy also proves effective in exfoliating the graphite flakes, demonstrating excellent generalization capability. This work opens up a new avenue for developing the high-performance TIMs, showing huge potential in large-scale production.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 5","pages":"Article 101011"},"PeriodicalIF":8.4,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142924675","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}

引用次数: 0

Cephalopod-inspired soft composite with liquid metal inclusions for tunable infrared modulation 受头足类启发的软复合材料与可调红外调制的液态金属内含物

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2025-01-04 DOI: 10.1016/j.jmat.2025.101012

Bin Yao , Siyuan He , Run Wang , Yihang Zeng , Wenxuan Shi , Yaxuan Zhu , Xinwei Xu , Shaowei Wang , Qing Wang , Hong Wang

{"title":"Cephalopod-inspired soft composite with liquid metal inclusions for tunable infrared modulation","authors":"Bin Yao , Siyuan He , Run Wang , Yihang Zeng , Wenxuan Shi , Yaxuan Zhu , Xinwei Xu , Shaowei Wang , Qing Wang , Hong Wang","doi":"10.1016/j.jmat.2025.101012","DOIUrl":"10.1016/j.jmat.2025.101012","url":null,"abstract":"<div><div>Artificial adaptive soft infrared (IR) materials, mimicking the color-changing abilities observed in soft organisms such as cephalopods, hold significant promise in various emerging technologies, including unconventional flexible displays, intelligent camouflage systems, and advanced sensors. In this study, we integrated inherently deformable liquid metal (LM) microdroplets randomly into an elastomer matrix, creating a fully soft material that exhibits elastic compliance akin to soft biological tissue and adaptive IR-reflecting properties in response to compression. Under compressive strains, each LM inclusion behaves as a unit of dynamic IR reflector, transitioning between a contracted droplet with a corrugated surface and an expanded plate-like filler with a relatively smooth surface. These alterations in shape, size, and surface structure allow dynamic modulation of incident IR radiation's reflection, resulting in reversible changes in IR color (i.e., detected temperature). This mechanism replicates the dynamic alterations observed in cephalopod skin, where chromatophores dynamically manipulate visible light reflection by changing their size and morphology. We demonstrate proof-of-concept applications of this material, showing its ability to modify IR appearance through compression for visualization, with its localized color-change mechanism enabling its use as a tactile sensor in vision-based tactile grippers. These illustrate the potential of this material in emerging adaptive flexible electronics.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 5","pages":"Article 101012"},"PeriodicalIF":8.4,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142924678","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}

引用次数: 0

Investigation of crystal structure and chemical bonds characteristics on microwave properties of novel Ca-doped Sr1–xCaxTm2O4 (x=0.025–0.300) ceramics 新型掺钙Sr1-xCaxTm2O4 （x= 0.025-0.300）陶瓷的晶体结构和化学键特性对微波性能的影响

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2024-12-29 DOI: 10.1016/j.jmat.2024.101000

Wenjie Zhang , Yanjun Liu , Guoqiang He , Ziqi Zhao , Yuan Nie , Yiwen Ma , Fangyi Huang , Huanfu Zhou

{"title":"Investigation of crystal structure and chemical bonds characteristics on microwave properties of novel Ca-doped Sr1–xCaxTm2O4 (x=0.025–0.300) ceramics","authors":"Wenjie Zhang , Yanjun Liu , Guoqiang He , Ziqi Zhao , Yuan Nie , Yiwen Ma , Fangyi Huang , Huanfu Zhou","doi":"10.1016/j.jmat.2024.101000","DOIUrl":"10.1016/j.jmat.2024.101000","url":null,"abstract":"<div><div>Dense microwave dielectric ceramics of Sr1–xCaxTm2O4 (x = 0.025–0.300) were fabricated via the conventional solid-state reaction method. Systematical investigations on the impact of Ca2+ on their microstructures, sintering behaviors, and microwave dielectric properties were detailly conducted. The combined XRD data and subsequent refinement demonstrated that all samples exhibited structural conformity with SrTm2O4 and belonged to Pnam space group. Calculations were executed to illustrate the evolution of performance-related chemical bonding parameters associated with Ca2+ on the basis of the PVL theory. High density, lattice energy and narrow full width at half maximum of Raman modes contribute to a performance boost of around 14%. Excellent dielectric properties of Sr0.95Ca0.05Tm2O4, including relative permittivity of 15.97, quality factor of 47,142 GHz, and temperature coefficient of resonant frequency of −24.65 × 10−6 °C−1. Furthermore, Sr0.95Ca0.05Tm2O4 ceramics were designed as rectangular dielectric resonator antennas with 388 MHz bandwidth at the center frequency of 6.525 GHz, along with high simulated radiation efficiency (≥90%) and realized gain (5.80–6.47 dBi), which suggests their considerable potential in 5G communication applications.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 5","pages":"Article 101000"},"PeriodicalIF":8.4,"publicationDate":"2024-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142887610","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}

引用次数: 0

3D crosslinked and interlocked graphene nanointerface enables ultra-tough and strong alumina 3D交联和互锁石墨烯纳米界面使超韧性和强氧化铝

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2024-12-27 DOI: 10.1016/j.jmat.2024.100999

Yameng Jiao , Caixiang Xiao , Qingliang Shen , Xuemin Yin , Shouyang Zhang , Wei Li , Chuanyun Wang , Hejun Li , Qiang Song

{"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⋅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.</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}

引用次数: 0

Design of double oxygen vacancy-rich Bi2O2S0.8F0.4/BiOBr S-scheme heterojunction via tuning band structure for CO2 photoreduction 利用调谐能带结构设计富双氧空位Bi2O2S0.8F0.4/BiOBr S - scheme异质结用于CO2光还原

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2024-12-24 DOI: 10.1016/j.jmat.2024.100998

Xifeng Hou , Chenbin Ai , Songyu Yang , Jianjun Zhang , Yanfeng Zhang , Jingze Liu

{"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 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.</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}

引用次数: 0

Efficient visible-light-driven alcohol oxidation coupled hydrogen production on 0D/0D “n-NiWO4/p-CdS” S-scheme heterojunction 0D/0D“n-NiWO4/p-CdS”S-scheme异质结的高效可见光驱动醇氧化偶联制氢研究

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2024-12-22 DOI: 10.1016/j.jmat.2024.100997

Yanfang Tao , Sujuan Zhang , Jinfeng Zhang , Zhongliao Wang , Gaoli Chen , Xiuzhen Zheng , Shifu Chen

{"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 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.</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}

引用次数: 0

Superposition of bulk and interface electric field for boosting charge transfer in Bi2MoO6/Bi19Br3S27 S-scheme heterojunctions Bi2MoO6/Bi19Br3S27 S-scheme异质结体电场与界面电场叠加促进电荷转移

IF 8.4 1区材料科学

Journal of Materiomics Pub Date : 2024-12-19 DOI: 10.1016/j.jmat.2024.100996

Hui Yang , Zhongliao Wang , Jinfeng Zhang , Kai Dai , Jingxiang Low

{"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 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 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 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.</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}

引用次数: 0