JOURNAL OF ALLOYS AND COMPOUNDS
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2015
·
IF 2.999
Lijuan Sun,Lei Lu,Yu Bai,Kening Sun
In the current study，three-dimensional porous architectures (CSHPS-G) based on reduced graphene oxide (RGO) and CoS hierarchical sphere (CSHPS) are reported. A facile hydrothermal method is used to synthesize such three-dimensional architecture. When the resulting CSHPS-G is evaluated as counter electrode of dye-sensitized solar cells, it delivers an excellent electrochemical activity toward the reduction of I 3 − , which is resulted from the synergetic effect between CoS hierarchical architecture and RGO. Consequently, the device based on CSHPS-G electrode showing a better photovoltaic performance than that of the Pt electrode .
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 10
·期 2
·406-416
·
IF 7.779
Zhenyuan Ji,Guanxiang Tang,Dongwei Ma,Lizhi Chen,Guoxing Zhu,Jun Zhu,Xiaoping Shen
Devising electrode materials with novel configurations and unique properties is a feasible strategy to boost the electrochemical properties of hybrid supercapacitors. This research demonstrates an effective two-step strategy to construct N,S co-doped porous carbon (NSC) sphere supported CoS nanoparticles with phosphate functionalization (P-NSC/CoS). Benefiting from the active multi-components, the electrochemical features of CoS can be remarkably modulated after the NSC and phosphate modifications. As the cathode material for the supercapacitor, the acquired P-NSC/CoS composite delivers a splendid capacity of 436.5 C g−1 at 1 A g−1 and a superb cycling property of 91.5% after 10 000 cycles at 10 A g−1 in 6 M KOH. Furthermore, the Fe2O3 nanocrystals with ultrafine size are in situ deposited on NSC via a solvothermal-calcination process. The NSC/Fe2O3 composite presents a sizeable capacitance of 433 F g−1 at 1 A g−1 with 100.6% capacitance retention after 10 000 cycles. More significantly, it is inspiring that the assembled P-NSC/CoS//NSC/Fe2O3 hybrid supercapacitor delivers an energy density of up to 64.3 W h kg−1 at 873.6 W kg−1 and a splendid cycling stability of 94.2% after 10 000 cycles at 5 A g−1 in 6 M KOH. The appreciable data demonstrate that the prepared advanced electrode materials and the hybrid supercapacitor display excellent application prospects in energy storage.
研究领域:
材料科学
·
能源存储技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2026
·
IF 16.8
Jing Tian,Mei-Jing Cao,Jin Dang,Wen-Long Liu,Yang Zhou,Zhen-Yu Zhang,Ying Li,Jia-Run Li
The low electrical conductivity and inferior catalytic activity of cobalt sulfide are the primary factors limiting their application in electrocatalytic water splitting. In this work, CoS/Co 3 S 4 and Fe-CoS/Co 3 S 4 were initially synthesized via a hydrothermal method and subsequently annealed in an NH 3 atmosphere to obtain Fe, N-CoS/Co 3 S 4 . On the one hand, introducing the Fe element resulted in the modulation of the electronic structure and increased the electrochemically active surface area, promoting charge transfer efficiency and providing more active sites for the oxygen evolution reaction and overall water splitting reactions. On the other hand, doping N element introduced sulfur vacancies, enhancing the electrical conductivity and charge transfer efficiency. Consequently, Fe, N-CoS/Co 3 S 4 exhibits significantly higher oxygen evolution reaction (OER) and overall water splitting activity at a current density of 10 mA cm −2 compared to CoS/Co 3 S 4 , with overpotentials of 294 mV and 332 mV, respectively. Furthermore, this catalyst demonstrates excellent stability. The design of the catalyst structure provides theoretical support for researching Co-based catalysts in oxygen evolution reactions and overall water splitting.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Guangchao Jin,Dongmei Liu,Kaihan Hu,Songyuan Sun,Huigui Wu,Na Fu,Jingbo Chen
The problem of rapid degradation of the operating voltage and discharge specific capacity of lithium-rich layered oxide (LRMs) cathode materials is a major constraint for their commercial application. In this paper, CoS coating with a 3D layered structure assisted by PVP is used to enhance the cycle life and rate performance of the LRMs material. The introduction of PVP has the following effects: (1) it reduces the solubility of CoS in the electrolyte solution and forms a stable CoS coating, and (2) it acts as a nitrogen-containing carbon matrix material and the heteroatomic dopant, and can provide more active sites to improve the conductivity of CoS. In addition, the CoS coating is capable of efficaciously reducing the direct contact area between electrolyte solution and the LRMs material and alleviating the occurrence of harmful interface reactions. The result of this study manifests that after the modification through CoS modification by PVP, the problem of the capacity decay is obviously solved. When the current density is 0.2 C, the highest specific capacity of 248.87 mAh g–1 can be provided. The capacity retention ratio of the LRMs@CoS material is 87.21% after 100 cycles, and the capacity decay is 0.3182 mAh g–1 (1.1534 mAh g–1 for the LRMs material) per cycle. When the current density is 1 C, the first discharge specific capacity of 220.91 mAh g–1 is achieved, which demonstrates outstanding electrochemical performance. This study has come up with a simple and practical mentality to realize the modification of cathode materials for high-performance lithium-ion batteries.
研究领域:
材料科学
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电化学
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储能技术
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锂离子电池
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Lina Wang,Yun Zhao,Lijuan Cao,Yong Li,Gaoyi Han,Canliang Ma,Zongping Shao
Exfoliated graphite (EG) as important matrix material for potassium-ion batteries (PIBs) suffers from its inherent low surface activity, which results in poor interactions with active matter (e.g. metal sulfides) and undesired initial capacity decay of the EG-based electrodes. To address these issues, in this study, an attempt for EG’ surface engineering has been carried out through a stepwise gas-phase strategy. A S-doped carbon nanofiber/nanotube (CNF/CNT) hybrid was in-situ introduced on the surface of EG to form a novel micro-/nano- multiscale matrix structure. CoS nanoparticles are encapsulated in the inner of CNFs and CNTs. The special core–shell configuration not only prevents the aggregation of CoS during the sulfidation process, but also confines the active nanoparticles to avoid pulverization and maintains stable integrated electrode structure. Moreover, the couple effect between the active site-rich nature of CNFs and the high conductivity of CNTs as well as the formation of 3D porous network contribute to substantially elevated reversible capacity (411 mAh g −1 ), excellent initial cycling stability and rate capability (184 mAh g −1 at 2.0 A g −1 ). The effective surface modification strategy dominated by rational hybridization of CNFs and CNTs provides a new avenue for the development of high-performance electrode materials in PIB applications.
研究领域:
材料科学
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能源存储与转换
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高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 50
·505610
·
IF 3.874
Liyun Qin,Yan Lu,Qinliang Li,Zhendong Wang,Jianyu Wang,Binbing Tang,Wenda Zhou,Cailei Yuan,Qisheng Wang,Li Wang
The combination of two-dimensional (2D) materials with non-2D materials (quantum dots, nanowires and bulk materials), i.e. mixed-dimensional van der Waals (md-vdW) heterostructures endow 2D materials with remarkable electronics properties. However, it remains a big challenge to synthesize md-vdW heterostructures because of the difference of crystal symmetry between 2D and non-2D materials. Meanwhile, it is difficult to initiate the nucleation due to the lack of chemical active sites on chemical inert surfaces of 2D materials. Herein, we design a general chemical vapor deposition method for synthesizing a broad class of md-vdW heterostructures with well-aligned hexagonal symmetry including MoS2/FeS, MoS2/CoS, MoS2/MnS, MoS2/ZnS, Mo(SxSe1–x)2/ZnSxSe1–x, Mo(SxSe1–x)2/CdSxSe1–x. Combining with DFT calculation, we find that the hexagonal symmetry and the centered clusters of MoS2 and Mo(SxSe1–x)2 nanoflakes are two crucial factors to launch the hexagonally oriented growth and nucleation of non-2D materials on 2D materials. Our discovery opens an opportunity for the versatile hetero-integration of 2D materials and allows systematic investigation of physical properties in a wide variety of md-vdW heterostructures.
研究领域:
材料科学
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纳米技术
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化学
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物理学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Xiao-Shi Yuan,Sheng-Hua Zhou,San-Mei Wang,Wenbo Wei,Xiaofang Li,Xin-Tao Wu,Qi-Long Zhu
Electrocatalytic selective hydrogenation of α,β-unsaturated aldehydes represents a sustainable approach to achieve the highly value-added products, while the kinetic and selectivity are still greatly depend on the elaborated nanostructure design of electrocatalysts. In this study, by the sulfidation of ordered macroporous ZIF-67 single crystals, the ordered macroporous superstructure of carbon with abundant edge defects was achieved, where the tiny CoS nanoparticles are favorably anchored with homogeneous dispersion. Impressively, this superstructured electrocatalyst exhibited a remarkable activity towards the selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde with water as hydrogen source, acquiring the highest selectivity up to 92.1 % at 12 mA cm –2 with a cinnamaldehyde conversion of 89.6 %. The further experimental analysis combined with the density functional theory calculations revealed that the preferential absorption of C C over the tiny CoS nanoparticles with the maximal site accessibility, and the facilitated mass and charge transfer enabled by the ordered macropore engineering, jointly contribute to the excellent electrocatalytic performance. Additionally, this electrocatalyst also exhibited good expandability for several kinds of α,β-unsaturated aldehydes/ketones with different functional groups. Our findings offer new insights into the electrocatalytic selective hydrogenation, emphasizing the role of ordered pore engineering in constructing favorable microenvironments and synergizing active sites.
研究领域:
材料科学
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电化学
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催化
·
化工
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Wenxue Zhao,Aihua Yan,Zigao Su,Fei Huang,Jixu Zhang,Ye Gao,Huaqi Yuan
Enabling highly-efficient multiplex-optimization photocatalysts is critical to overcome the bottlenecks of hydrogen evolution reaction efficiency and photostability. Herein, novel CoS/S v -ZnIn 2 S 4 /MoS 2 composites are successfully synthesized through an in situ technique. Taking advantage of the synergistic effect of sulfur vacancy, Schottky-type MoS 2 /S v -ZnIn 2 S 4 junction and Ohmic-type CoS/S v -ZnIn 2 S 4 junction, the light absorption, electron/hole separation efficiency, charge transfer rate and hydrogen reduction reaction dynamic can be significantly enhanced. As a result, an impressive photocatalytic hydrogen evolution rate of 18.43 mmol g −1 h −1 is achieved under the visible-light irradiation. Furthermore, apparent quantum efficiencies of 72.14 % and 9.91 % are also achieved under 350 and 420 nm monochromatic light irradiation. This work presents an in situ perspective to design multiplex-optimization photocatalytic system for highly-efficient hydrogen production.
研究领域:
材料科学
·
光化学
·
能源材料
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Haoran Pan,Xinning Huang,Zhenjie Lu,Zhiqiang Zhang,Baigang An,Dongling Wu,Tao Wang,Xingxing Chen,Fangyi Cheng
The development of high-performance non-precious bifunctional electrocatalysts for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is urgently needed to realize the commercialization of rechargeable metal-air battery. Herein, we report a ZIF-67 derived hybrid Co-based carbon composite as bifunctional ORR/OER electrocatalyst exhibiting excellent performance and stability in a custom-built Zn-air battery. The catalyst was formed by pyrolytic carbonization of ZIF-67 followed by mild oxidation and sulfurization to a hybrid composite (Co/Co 3 O 4 @CoS-SNC) comprised of multiple active sites including Co-N 4 , Co-N/S-C, C-N/S-C, Co 3 O 4 and CoS, as well as the surface and edge defects in the carbon matrix, that act concertedly yielding a highly efficient bifunctional ORR/OER catalyst for reversible oxygen electrodes. The catalyst affords remarkably low reversible overpotentials and stability not only in a 3-electrode system, but also in a custom-constructed Zn-air battery, exhibiting competitive performance against state-of-the-art bifunctional ORR/OER electrocatalysts reported to date and thus placing it among the best non-precious metal catalysts for reversible oxygen reactions.
研究领域:
材料科学
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能源化学
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电催化
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DOI
高影响因子
JOURNAL OF ETHNOPHARMACOLOGY
·
2024
·
IF 4.8
Chunlei Wei,Lingjiao Wu,Yuyi Wu,Chunyi Xu,Huiling Hu,Zhanguo Wang
Ethnopharmacological relevance As a representative local medicinal herb produced in China, Vladimiriae Radix (VR) has been proven to exert hepatoprotective and choleretic effects, with particular therapeutic efficacy in cholestatic liver injury (CLI), as demonstrated by the VR extract (VRE). However, the quality markers (Q-markers) of VRE for the treatment of CLI remain unclear. Aim of the study A new strategy based on the core element of “efficacy" was proposed, using a combination of spectrum-effect relationship, pharmacokinetics, and molecular docking methods to select and confirm Q-markers of VRE. Material and methods First, the HPLC fingerprinting of 10 batches of VRE was studied, and the in vivo pharmacological index of anti-CLI in rats was determined. The spectrum-effect relationship was utilized as a screening method to identify the Q-markers of VRE. Secondly, Q-markers were used as VRE pharmacokinetic markers to measure their concentrations in normal and CLI rat plasma, and to analyze their disposition. Finally, molecular docking was utilized to predict the potential interaction between the identified Q-markers and crucial targets of CLI. Results The fingerprints of 10 batches of VRE was established. The in vivo pharmacological evaluation of rats showed that VRE had a significant therapeutic effect on CLI. The spectrum-effect correlation analysis showed that costunolide (COS) and dehydrocostus lactone (DEH) were the Q-markers of VRE anti-CLI. The pharmacokinetic results showed that AUC (0-t) , C max , CL Z/F , and V Z/F of COS and DEH in CLI rats had significant differences ( P < 0.01). They were effectively absorbed into the blood plasma of CLI rats, ensuring ideal bioavailability, and confirming their role as Q-markers. Molecular docking results showed that COS, DEH had good affinity with key targets (FXR, CAR, PXR, MAPK, TGR5, NRF2) for CLI treatment (Binding energy < −4.52 kcal mol −1 ), further verifying the correctness of Q-marker selection. Conclusions In this study, through the combination of experimental and theoretical approaches from the aspects of pharmacodynamic expression, in vivo process rules, and interaction force prediction, the therapeutic effect of VRE and Q-markers (COS、DEH) were elucidated. Furthermore, a new idea based on the principle of “efficacy" was successfully proposed for screening and evaluating Q-markers.
研究领域:
民族药理学
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药理学
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分析化学
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分子生物学
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DOI
PubMed
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 26
·3240-3250
·
IF 3.1
Ruihua Tang,Xueyan Yan,Min Li,Aoqi Du,Hui Yang,Huancai Yin,Mingyue Xie
Nucleic acid detection technologies have been widely utilized for various diseases. Conventional laboratory tests are less suitable for use in resource-limited settings as they are time-consuming, high-cost, complex, and heavily dependent on benchtop equipment. Rapid nucleic acid detection methods that consist of rapid nucleic acid extraction steps could overcome these challenges. A paper-based platform has been utilized to develop various rapid nucleic acid extraction methods owing to its cost-effectiveness, portability, and easy-modification. However, the existing paper-based nucleic acid extraction technologies mainly focus on improving the adsorption capacity of nucleic acids without reducing the non-specific adsorption capacity of proteins. In this study, paper-based nucleic acid extraction technology with wash-free, elution-free, and low protein adsorption was developed. The fabrication of paper involves the mixing of polyethylene glycol (PEG)-modified cotton fiber, chitosan (COS)-modified cotton fiber, and cotton fiber to form PEG-modified cotton fiber/chitosan-modified cotton fiber/cotton fiber (PEG-CF/COS-CF/CF) paper by the wet molding method. The result showed that PEG-CF/COS-CF/CF paper has a desirable pore size (23.9 ± 4.03 μm), good mechanical strength (dry: 9.37 Mpa and wet: 0.28 Mpa), and hydrophilicity (contact angle: 42.6° ± 0.36°). NH3+ groups of COS and OH− groups of PEG were observed on its surface and the adsorption efficiency of nucleic acid in TE buffer was 42.48% ± 0.30%. The limit of detection of pure DNA with this PEG-CF/COS-CF/CF paper by qPCR was as low as 25 ng. Additionally, this platform could successfully extract nucleic acid from 30 μL of a saliva sample, highlighting its potential use for clinical sample testing. The proposed paper-based nucleic acid extraction platform shows tremendous potential for disease diagnosis in resource-limited settings.
研究领域:
生物技术
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分子生物学
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诊断技术
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Wei Tian,Yaqin Rong,Dali Li,Jin Tian,Naiming Lin,Zhongde Wang
The contamination of water by heavy metal ions can easily cause serious environmental problems and damage to the human body hands down. Using zeolitic imidazolate framework-67 (ZIF-67) as a sacrificial template, polyhedral CoS hollow nanocages (HNC) were successfully synthesized by self-template approach as adsorbents for heavy metal ions removal. The CoS HNCs suggested good chemical stability and extremely efficient heavy metal ions removal of Ag + , Cd 2+ , Cu 2+ , Pb 2+ and Zn 2+ , which can be ranked in the order of Ni 2+ ≪ Zn 2+ , Cd 2+ < Pb 2+ , Cu 2+ , Ag + . The saturation adsorption for Ag + reached 2147.944 mg g −1 and exhibited high distribution coefficients (K d ) > 107 mL g −1 . The CoS HNCs can rapidly reduce the Ag + concentration from ppm level to trace level of 1 ppb. It has been proved that the rapid and selective adsorption was achieved via the hierarchical pore structure of the CoS HNCs can better disperse these metal vacancies with super affinity and the S 2− , reduce the mass transfer distance and accelerate mass transfer. It is expected that such a CoS HNCs could be a promising alternative to conventional materials for the adsorption of heavy metal ions.
研究领域:
环境科学
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材料化学
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纳米技术
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水处理
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吸附材料
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DOI
高影响因子
危险品化学品经营许可证（带存储）