ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Shilong Wang,Chuqi Li,Ziyun Zhang,Lei Li,Wentao Ding,Sheng Han,Jibo Jiang
Engineering a heterogeneous structure with distinctive morphology and nanostructure is deemed to be an efficacious tactic for realising high energy density supercapacitors (SCs). Herein, the FeCo 2 S 4 @NiCo-LDH(FeCoS@NiCo-LDH)/NF nanocomposite heterostructure is successfully constructed through a facile two-step electrodeposition method. This heterostructure merges the merits of FeCoS with high electrical conductivity and NiCo-LDH with ultra-high specific surface area, which not only can deliver sufficient electroactive central sites, but also provide shorter routes for expedited ion diffusion, even more significantly, the heterogeneous interfaces that emerge in composites can moderate their electronic structure and augment electrical conductivity. Density functional theory (DFT) calculations indicate that the heterostructured FeCoS@NiCo-LDH/NF displays preferable electrochemical activeness and enhanced adsorption ability. Thanks to the abundance of heterogeneous interfaces and synergistic effects of the various active ingredients, FeCoS/NiCo-LDH electrodes exhibit an extraordinary specific capacity of 930 C g −1 at 1 A g −1 together with remarkable cycle longevity (10.9 % capacity decay after 10,000 cycles). In addition, a hybrid FeCoS@NiCo-LDH/NF//AC exhibits a high energy density of 52.81 Wh kg −1 at the 750 W kg −1 .
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yuqing Chen,Jun Zhou,Yongfei Li,Chengxiang Chen,Beibei Jia,Haomin Guo,Zixuan Zhang,Kai Wu
Polymer-based dielectric composites with inorganic oxide fillers could exhibit synergistic physical and chemical characteristics from both advantages, which have flexible applications in electrical and electronic technology. As composites with various substances, the interfacial structure plays a key role in the electric and dielectric properties. In this work, BaTiO3 particles were embedded in polyvinylidene fluoride (PVDF) by a solution crystallization process. The conductivity and dielectric constant of the composites increased with the increase of the BaTiO3 filler contents. The charge injection and dissipation behavior at the nanointerface of the composite is investigated by Kelvin probe force microscopy. It is found that the charges are more easily injected into the nanointerface between the particle and the polymer. The accumulation and dissipation of surface charges obey the exponential law. The space-charge polarization is also suggested to be a key factor of injection, while the charge dissipation is determined by charge tunneling. The result also demonstrates that the strong interfacial polarization between the BaTiO3 particles and the PVDF matrix plays a crucial role in the dielectric properties. This work provides significant insights into understanding the interfacial charge transport in dielectric composites.
研究领域:
材料科学
·
物理学
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产品关联
DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Huihui Liu,Yue Li,Miaomiao Xiang,Hualing Zeng,Xiang Shao
Interfacial charge transfer is critical for the photocatalytic activities of compositional photocatalysts. In this work, we have developed a strategy of growing single-layer MoS2 sheets on the rutile TiO2(110) single-crystal surface using a chemical vapor deposition method. Both on-site and off-site characterizations confirmed the monolayer thickness and single crystallinity of the MoS2 adlayer as well as the atomic flatness of the composite surface. Without the presence of contamination, the charge flow across the interface of MoS2 and TiO2 is greatly enhanced, which hence favors the charge separation under excitations and boots up the catalytic activity of the composite system. Moreover, we found the luminescing property of MoS2 is significantly tailored upon coupling with the TiO2 surface. Our work has established a method for revealing the interface properties of the transition-metal dichalcogenides and oxide semiconductors at the atomic level.
研究领域:
材料科学
·
物理化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Mingfei Yu,Xiangyu Kong,Jianhui Luo,Hanqiang Zhou,Yanxin Gao,Chenghui Zheng,Qiaoshan Chen,Jinhong Bi
The semiconductor-insulator heterostructure, characterized by outstanding economic-efficiency and catalytic activity, represents a promising photocatalyst for practical pollutants degradation. However, achieving energy band matching between semiconductors and insulators remains a challenge. In this study, we meticulously designed and synthesized a band-matched semiconductor-insulator photocatalysts (AgI-BaCO 3 ), leveraging the in-situ nucleation of ultrafine AgI nanoparticles on BaCO 3 surface. The finely crafted heterostructure notably enhanced degradation efficiency of tetracycline over both pure AgI and BaCO 3 , demonstrating a remarkable pseudo-first-order kinetic rate constant that surpassed them by 27.2 and 33.5 times, respectively. The density functional theory calculations uncovered that the intense covalent interaction between AgI and BaCO 3 established a specific channel for interfacial charge carriers. The generated CO 3 ·- radicals as the main active species markedly expedited the removal of antibiotics. Furthermore, the catalysts demonstrated robust activity in real wastewater and surface water. This work supplies a novel reference for constructing insulator-based photocatalysts and elucidates its potential application in actual aquatic environments.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yidong Ming,Yongqi Zhu,Yuan Chen,Bowen Jin,Chenhui Duan,Zihui Liang,Li Zhao,Shimin Wang,Binghai Dong,Haijin Li,Congcong Wu
SnO2 films as a promising electron transport layer (ETL) have been widely used in planar-type perovskite solar cells to achieve an impressive improvement in the conversion efficiency. However, compared with a mesoporous ETL, the interfacial charge carrier transfer of the SnO2 ETL is severely limited due to the issues of oxygen vacancy defects and crystal lattice mismatch between SnO2 and the perovskite, which generally leads to the growth of randomly stacked and porous perovskite layers and subsequently impacts the charge transport and transfer properties. In this work, we developed a facile approach by inducing a bifunctional molecule, β-alanine, into the SnO2 ETL, which can serve as a bridge to modulate the interfacial charge transfer and the perovskite crystallization kinetics. Benefited by the interfacial β-alanine, we grew a highly orientational perovskite layer that exhibited superior charge transport properties. Meanwhile, the β-alanine caused an intimate connection between the perovskite and SnO2 to enhance the interfacial charge transfer. As a result, the power conversion efficiency (PCE) of the β-alanine-modified device achieved a much-improved value of 19.67% and showed high reproducibility. This work provides a way for developing a high-performance ETL toward the scalable fabrication of highly efficient PSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2022
·
IF 5.6
Yunjie Zhou,Jie Wu,Zhenzhen Wang,Hui Huang,Yang Liu,Zhenhui Kang
Biomass-derived catalysts represent one of the greener alternatives for green catalysis. Oxygen reduction electrocatalysts with high efficiency, low cost and large-scale production are the key to promote the commercialization of new energy technology, such as, metal-air battery. Herein, the cheap and available spirulina was used as the carbon source, and a metal-free and porous carbon catalyst (C111-900) was prepared using dual template and solid reaction strategy. The porous structure also regulates the dynamic process of interface charge transfer, which keeps the fast process part of the charge transfer consistent while accelerating the slow process. As a result, C111-900 performs exceptionally well in alkaline media, achieving close to 20% Pt/C, including the half-wave potential, limiting current density and catalytic selectivity. Additionally, it exhibits higher power density (138.5 mW cm −2 ), specific capacity (766.4 mAh g Zn −1 ), energy density (958 Wh kg Zn −1 ) and has greater stability under high current discharge conditions than 20% Pt/C in Zn-Air batteries
研究领域:
材料科学
·
能源技术
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Tianyi Zhang,Jing Lu,Xue Li,Zhitao Zou,Mengdan Kong,Jixiang Xu,Vladimir Turkevich,Haifeng Lin,Yanyan Li,Lei Wang
Optimizing the Z-scheme charge transmission of lateral heterojunction constructed by single-layer (SL) nanosheets is an appealing yet challenging tactics to boost photocatalytic efficiency for solar fuel production and environmental remediation. Herein, we reported the edge/corner-specific growth of SL ZnIn 2 S 4 -MoSe 2 lateral heterojunction with intensified Z-scheme charge transmission through intimate Mo-S connection and S vacancies (V S ) engineering. The Mo-S chemical bonds inside ZnIn 2 S 4 -MoSe 2 heterojunction offer a speedy channel for Z-scheme charge transmission as confirmed via surface photovoltage spectroscopy, radical production, and in situ photo-irradiated X-ray photoelectron spectroscopy tests as well as density functional theory calculation, while V S engineering enlarges Fermi level difference between ZnIn 2 S 4 and MoSe 2 to strengthen internal electric field and driving force for photo-carriers transmission, resulting in an excellent photocatalytic H 2 evolution (PHE) capability. Isotopic labeling experiment verified the photocatalytic water reduction by ZnIn 2 S 4 -MoSe 2 heterojunction, which exhibited a visible-light-driven PHE rate up to 55.70 mmol g −1 h −1 (or 550.70 μmol/10 mg/h) with an apparent quantum yield reaching 38.9 % at 400 nm. Moreover, the ZnIn 2 S 4 -MoSe 2 heterojunction also possessed a robust stability during long-term photocatalytic reaction. The research findings could inspire new idea to enhance the photocatalytic capability of two-dimensional (2D) heterojunction by strengthening Z-scheme charge transmission at atomic level.
研究领域:
材料科学
·
能源化学
·
表面物理化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Weimeng Zheng,Zhongyue Zhang,Nannan Liu,Qingyu Li,Jianbo Sun
The construction of heterogeneous structures could boost the performance of materials in gas sensing applications since the interface may enhance charge transfer. However, appropriate design and containable synthesis methods of heterogeneous structures with high-quality interfaces remain challenging. In this paper, heterolayered SnO2/SnSe nanosheet composites were prepared by regulating the alkali concentration to control the self-assembly rates of SnSe nanosheets while forming defect point oxidation. Heterolayered SnO2/SnSe nanosheets were synthesized by a one-step hydrothermal method and then used as a highly sensitive sensor for the detection of NO2 at room temperature. The as-obtained SnO2/SnSe materials were characterized using scanning electron microscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and I–V polarization to analyze the relationships between the heterogeneous structural morphology, crystallography, chemical components, electrical properties, and sensitivity mechanism. The results showed that the SnO2/SnSe-0.4 sample was prepared by the one-step hydrothermal method at the NaOH concentration of 0.04 mol/L. The SnO2/SnSe-0.4 sensor showed great sensitivity and higher selectivity to 1 ppm NO2 (resistance ratio = 7.8) at room temperature, roughly 7.1 and 2.7 times higher than that of pure SnSe and SnO2, respectively. In addition, the sensor exhibited a lower detection limit of 0.1 ppm. The improved sensing performance could be attributed to the large number of P–N heterojunctions of the SnO2/SnSe-0.4 material, enhanced interface charge transfer, and increased defect point oxidation in the material surface. The experimental results showed that SnO2/SnSe-0.4 is a very promising room-temperature NO2 gas sensing material, providing guidance for the rational design of heterogeneous structural sensors.
研究领域:
材料科学
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传感器技术
·
纳米材料
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Zirui Lou,Yingchen Yang,Yichen Wang,Chao Qin,Rong Liang,Yanwen Wang,Zhizhen Ye,Liping Zhu
Ta 3 N 5 is a promising candidate for photoelectrochemical (PEC) water splitting. Recently gratifying photocurrents have been reported through various advanced techniques. However, obtaining high performance Ta 3 N 5 photoanode prepared by direct oxidation and nitridation remains challenging. In this work, efficient Ta 3 N 5 photoanode was fabricated on Ta foil by direct oxidation and nitridation method with LaCl 3 flux mediated treatment. The highest photoresponse (8.2 mA cm −2 @ 1.23 V RHE ) for direct oxidized and nitrided Ta 3 N 5 is achieved with the help of LaCl 3 flux, which is nearly doubled compared to the untreated counterparts. Theoretical analysis suggests an interfacial charge transfer in LaTaON 2 /Ta 3 N 5 heterostructure and significant increase in carrier concentration on La doped Ta 3 N 5 surface. The introduction of LaCl 3 flux brings a new look to this traditional method and it may potentially be applied to large area and low cost photoanodes.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Jiayan Xue,Lizhen Long,Lin Zhang,Hongtian Luo,Li Yang,Fuchi Liu,Fengzhen Lv,Wenjie Kong,Jun Liu
Synergistic the modulation of photon absorption capability and interfacial charge transfer of the photocatalyst are highly required for developing high-performance heterojunction photocatalysts. The ternary CdS-graphene quantum dots-titanate nanotubes (CdS-GQDs-TNTs) nanocomposite have been prepared by an in situ growth method. The physicochemical characterization reveals that the GQDs are firmly decorated on both inner and outer surface of TNT through the formation of Ti–O–C chemical bonding, and CdS QDs are loaded on the outer surface of TNTs through strong interfacial interaction . The intimate integrated CdS-GQDs-TNTs nanocomposite exhibits much superior photocatalytic performance toward H 2 production compared with binary GQDs-TNTs and pure TNTs photocatalyst, which can be attributed to the combined interaction of the stronger visible light harvesting, the longer lifetime of photogenerated electron−hole pairs, faster interfacial charge transfer rate, fast and long-distance electron transport pass. The interfacial charge transfer mechanism of CdS-GQDs-TNTs ternary composite are proposed based on photoelectrochemical measurements.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 8
·618
·
IF 4.3
Ting Liu,Yun Wu,Hao Wang,Jichang Lu,Yongming Luo
The urgent need for sustainable CO2conversion technologies has driven the development of advanced photocatalysts that harness solar energy. This study employs a CTAB-assisted solvothermal method to fabricate a Z-scheme heterojunction Fe-MOFs/VO-Bi2WO6(FM/VO-BWO) for photocatalytic CO2reduction. Positron annihilation lifetime spectroscopy (PALS) was employed to confirm the existence of oxygen vacancies, while spherical aberration-corrected transmission electron microscope (STEM) characterization verified the successful construction of heterointerfaces. X-ray absorption fine structure (XAFS) spectra confirmed that the defect configuration and heterostructure changed the surface chemical valence state. The optimized 1.0FM/VO-BWO composite demonstrated exceptional photocatalytic performance, achieving CO and CH4yields of 60.48 and 4.3 μmol/g, respectively, under visible-light 11.8- and 1.5-fold enhancements over pristine Bi2WO6. The enhanced performance is attributed to oxygen vacancy-induced active sites facilitating CO₂ adsorption/activation. In situ molecular spectroscopy confirmed the formation of critical CO2-derived intermediates (COOH* and CHO*) through surface interactions involving four-coordinated and two-coordinated hydrogen-bonded water molecules. Furthermore, the accelerated interfacial charge transfer efficiency mediated by the Z-scheme heterojunction has been conclusively demonstrated. This work establishes a paradigm for defect-mediated heterojunction design, offering a sustainable route for solar fuel production.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Qiang Wang,Lina Kong,Jianping Xu,Baozeng Zhou,Xiaofan Liu,Ziyu Lin,Shaobo Shi,Xiaosong Zhang,Lan Li
The construction of efficient and nonprecious cocatalysts, along with the establishment of rapid interfacial charge migration pathways to host semiconductors, is a major process in enhancing photocatalytic water splitting performance and remains a formidable challenge. Herein, the composition of CoP/CoO cocatalysts on g-C3N4 is regulated through phosphating for efficient and stable H2 evolution. Comprehensive analyses reveal that the CoO nanocrystals, possessing a bandgap of 1.95 eV, are uniformly loaded onto g-C3N4 with a portion undergoing an in situ transformation to metallic CoP, thereby forming a well-defined interfacial energy level structure for carrier separation. Moreover, the CoP/CoO cocatalysts exhibited a lower hydrogen adsorption Gibbs free energy (ΔGH) than that of the mono CoP or CoO. The optimal CoP/CoO/g-C3N4 exhibits an attractive and stable rate of solar-driven H2 evolution at 0.86 mmol·g–1·h–1, surpassing the rates of CoO/g-C3N4 and Pt/g-C3N4 by 30 and 1.5 times, respectively. The dual-driven interfaces of CoP/CoO/g-C3N4 provide a 2-fold acceleration for directional carrier transfer, in conjunction with accelerated surface reaction kinetics, resulting in efficient and stable H2 evolution. This scalable strategy, focusing interfacial engineering for rapid carrier transfer, offers a novel perspective in the design of highly active cocatalysts to boost the photocatalytic application.
研究领域:
材料科学
·
催化化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）