APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Chunyu Yin,Xin Liu,Zhenli Xiang,Dongchuang Wan,Ruikun Jiang,Xiyuan Zhang,Jiaxin Yu,Yebin Zhou,Chaofan Ma,Chunhui Zhou,Feng Feng,Qunfeng Zhang,Chunshan Lu,Xiaonian Li,Yi Liu
It is extremely ideal but also a challenge to develop stable and effective hydrogenation catalysts with high activity for the product of value-added fine chemicals. Herein, we report a in situ S-doped NC graphene-like shell encapsulated cobalt nanoparticles catalyst (Co@S-NC) for the hydrogenation of nitroarenes. The introduction of sulphur into NC graphene-like shell surface enhances the electron disturbance and promotes the electron transfer interior metal into external graphene-like shell, accompanying with triggering hydrogenation reaction. For Co@S-NC catalyst, the unusual coordination environment between Co NPs metal and NC graphene-like shell decreases limitation of the graphene-like layer and possesses an eminent catalytic activity and reusability. The Density functional theory (DFT) calculations indicate that CoN 3 S 1 within Co@S-NC, the center of S-doped NC graphene-like shell encapsulated cobalt nanoparticles, is an active site for the hydrogenation reaction and has a lower energy barrier 1.03 eV for the rate-determining step than CoN 4 of Co@S-NC catalyst. These researches verify that the Co@S-NC, excellent graphitic carbon encapsulation material, manifests a wide application for increasing the catalytic activity of graphene-like shell embedded catalyst.
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高影响因子
Nanoscale
·
2020
·Vol. 12
·期 25
·13811-13821
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IF 6.895
Lingxia Zheng,Jianlan Song,Xiaoying Ye,Yongzhi Wang,Xiaowei Shi,Huajun Zheng
Transition metal bimetallic sulfides derived from metal–organic frameworks (MOFs) hold great promise for energy-related applications. Here, a facile two-step MOF-engaged strategy is developed to grow ultrathin nickel–cobalt sulfide nanosheet arrays (NiCo-S) on Ni foam with robust adhesion, which provides a large specific surface area and excellent electric conductivity. The optimal self-supported NiCo-S electrode exhibits the best electrochemical performance as a binder-free electrode for supercapacitors with an ultrahigh specific capacitance of 3724 F g−1 at a current density of 1 A g−1 and maintains 1680 F g−1 at 20 A g−1, outperforming recently reported best values based on nickel–cobalt sulfides and oxide/hydroxide counterparts. The results demonstrate that the in situ growth of conductive Ni3S2, the presence of Co(OH)2 and the synergy between bimetals help contribute to the superior capacity. Most importantly, electronic and valence states are carefully investigated to reveal the synergetic effect and it is evidenced that the greatly decreased energy barrier differences between two redox pairs (Ni2+/Ni3+ and Co2+/Co3+) result in higher electrochemical performance. This work might shed light on the origin of high capacitance obtained from bimetallic compound based electrochemical energy storage devices.
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DOI
PubMed
高影响因子
Journal of Sulfur Chemistry
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2022
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IF 2.325
Qingqiang Tian,Lili Wang,Yahui Li
A new and convenient copper-catalyzed synthesis of alkyl sulfides has been accomplished using S-alkyl butanethioate as a thiol source. This catalytic protocol displayed a good functional groups tolerance and high efficiency. Both secondary and primary alkyl iodides can be used in this procedure. In addition, this method features operational simplicity and a wide substrate range, providing a complementary method for alkyl sulfide synthesis without requiring toxic thiols and noble metals.
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 11
·6533-6542
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IF 10.733
Yi Cao,Pengjian Zuo,Shuaifeng Lou,Zhen Sun,Qin Li,Hua Huo,Yulin Ma,Chunyu Du,Yunzhi Gao,Geping Yin
Lithium–sulfur batteries based on a solid-state sulfide electrolyte show great promise in achieving the next generation of rechargeable chemical power sources with high energy density and long lifespans. However, the poor solid–solid contacts within the electrode and at the electrode/electrolyte interface, as well as lithium dendrite formation and its interaction with sulfide electrolytes during cycling, are significant challenges that must be overcome before the full potential of sulfide electrolyte-based lithium–sulfur batteries can be realized. Here, we propose a [Li(triglyme)]+[TFSI]− (LiG3) solvent-salt complex with an excellent stabilizing effect towards Li10GeP2S12 electrolyte and demonstrate its application in a high-performance solid-state lithium–sulfur battery. A small quantity of LiG3 added into the cathode material dramatically enhanced the Li+ ion transfer and facilitated the transition from a solid–solid redox reaction involving sulfur species to a solid–liquid dual-phase redox reaction. Simultaneously, we achieved a stabilized solid electrolyte interphase layer at the lithium anode side by the in situ electrochemical reduction of LiG3 complex. The solid-state lithium–sulfur cells demonstrated high specific capacities of 1100 mA h g−1 at 0.2C and 650 mA h g−1 at 1.0C. Furthermore, pouch cells with dimensions of 4 × 5 cm2 were successfully fabricated, indicating the promising practical application of these cells in energy storage.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Yanei Xue,Penghui Shao,Mingli Lin,Yixing Yuan,Wenxin Shi,Fuyi Cui
Defect engineering is crucial in the development of semiconductor catalyst activity. However, the influence of defect/vacancy density and states on catalysis remains vague. Thus, the optimized sulfur vacancy (S V ) state is achieved among Fe-ZnS models (ZFS) via a chemical etching strategy for photocatalytic degradation (PD). As the S V concentration (ρS V ) increases, the predominant state of vacancies changes from isolated defects－ a state to a combination of a state and vacancy clusters－ e state, as verified by positron annihilation and X-ray absorption fine structure spectra. However, the two types of defect states activated the intrinsic activity of the crystal via radically different mechanisms and exerted different degrees of influence on PD activity, as revealed by first-principles calculations and quantitative structure-activity relationship. Our results suggest that the S V activity is strongly influenced by its concentration in the ZFS crystal, while the vacancy concentration is not a control parameter for the PD activity, but a defect form. The underlying essence of atomic defects behavior affecting crystal catalytic activity at the atomic level is also revealed in this paper. Uncovering these structural relationships provide a theoretical basis for designing effective catalysts.
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PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2014
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IF 2.129
Shuya Cui,Tao Wang,Xiaoli Hu
A new chiral ionic liquid was synthesized from (S)-1-phenylethylamine and it was studied by IR, Raman, polarimetry, NMR and X-ray crystal diffraction. Its vibrational spectral bands are precisely ascribed to the studied structure with the aid of DFT theoretical calculations. The optimized geometries and calculated vibrational frequencies are evaluated via comparison with experimental values. The vibrational spectral data obtained from IR and Raman spectra are assigned based on the results of the theoretical calculations by the DFT-B3LYP method at 6-311G(d,p) level. The computed vibrational frequencies were scaled by scale factors to yield a good agreement with observed experimental vibrational frequencies. The vibrational modes assignments were performed by using the animation option of GaussView5.0 graphical interface for Gaussian program.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Ling Wang,Wenzong Liu,Thangavel Sangeetha,Zechong Guo,Zhangwei He,Chuan Chen,Lei Gao,Aijie Wang
High overpotential and soaring prices of the cathode electrode are the bottlenecks for the development of microbial electrolysis technology for hydrogen production . In this study, a novel one-step electrodeposition method has been attempted to fabricate electrodeposited cathodes in situ growth of Ni–Co–S, Ni–S, Co–S catalyst on nickel foam (NF) to reduce the overpotential of electrodes. Finally, a uniform nanosheet with a high specific surface area and more active sites is formed on the NF surface, resulting in a lower overpotential than plain NF. At 0.8 V, the Co–S/NF cathode produces a favorable 42% increase in hydrogen yield (0.68 m 3 ·m −3 ·d −1 ), 40% upsurge in current density (10.6 mA/cm 3 ) and 39% rise of cathodic recovery rate (58.0 ± 3.2%) than bare NF, followed by Ni–Co–S/NF and Ni–S/NF cathode. All the electrodeposited electrodes demonstrate enhanced current density and reduced electron losses, thereby achieving efficient hydrogen production . These innovative varieties of electrodes are highly advantageous as they are relatively inexpensive and easy to manufacture with great potential in reducing costs and further real time application in large scale.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Bitao Zeng,Tao Xu,Yulong Ying,Lvlv Ji,Wei Li,Yuan Wei,Tao Wang,Sheng Wang
Freshwater scarcity and the high energy demand of conventional desalination technologies call for innovative and sustainable water purification strategies. Herein, we report a multifunctional, plant-transpiration-inspired photothermal fabric evaporator engineered from upcycled polyester/spandex (T/S) textile waste. Through a two-step hydrothermal–spray-coating strategy, a hierarchical asymmetric architecture is constructed: cobalt nanoneedles on the bottom layer act as root-like channels for rapid capillary pumping, the porous T/S matrix mediates intermediate water transport, and multi-walled carbon nanotubes (MWCNTs) decorated urchin-like microspheres on the top layer emulate leaf stomata for broadband photothermal harvesting and efficient interfacial evaporation. The optimized composite (CANT/S-30) delivers a high evaporation rate of 2.12 kg m −2 h −1 under one sun (82.1 % efficiency), while simultaneously generating a thermoelectric power density of 0.823 mW m −2 . In addition, the release of Co 2+ ions endowed the fabric with intrinsic antibacterial activity with >99 % bactericidal efficiency. The evaporator effectively desalinates seawater and removes organic dyes, and operates stably under outdoor solar conditions. By valorizing ubiquitous T/S waste into high-performance photothermal fabrics, this work establishes a sustainable pathway toward scalable solar desalination and distributed clean energy generation, bridging environmental remediation and circular-economy-driven textile upcycling.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Hui Feng,Wensheng Liu,Xinke Hu,Liufang Chen,Aiming Tang,Haiping Wang,Yao Huang
A novel (MoS2/C3N4)-sensitized TiO2 nanotube array (NTA) photoelectrode has been prepared by a simple hydrothermal synthesis and high-temperature calcination. When petal-like MoS2 nanosheets are uniformly distributed on the surface of TiO2 nanotubes coated with layered C3N4, a notable red-shift and high absorption are observed in the visible light region. The photocurrent density (mA cm−2) systematically increases from TiO2 NTAs (0.97), C3N4/TiO2 (1.25), MoS2/TiO2 (1.50), to TiO2/MoS2/C3N4 (1.97) under visible light irradiation, due to the dual S-scheme semiconductor heterostructures comprising multiple components with a staggered band offset. Such a heterostructure exhibits an enhanced photocatalytic performance towards the degradation of organic contaminants, e.g. P-nitrophenol (PNP) and rhodamine B (RhB).
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120662
·
IF 7.2
Bin Ou,Hongwei Rong,Baihui Cui,Jie Zhang,Fang Zhang,Dabin Guo
The coordination calcination method is used to form a coordination complex between Co 2 + and thiophene, which is adsorbed on carbon black (CB) and then calcined to prepare Co-S-C/CB single atom catalyst. Co-S-C/CB could efficiently activate peroxymonosulfate (PMS) by forming Co-S 3 coordination structure and Co-S 3 is the active site for activating PMS. Electron rich region was formed on the Co atom and the Co atom could keep in a low valence state during the catalytic process and donate electrons to PMS to produce radicals (•OH and SO 4 •- ) through a single-electron-reduction. Co-S-C/CB could not only promote PMS to generate •OH and SO 4 •- , but also inhibit the generation of 1 O 2 and O 2 •- . The radical pathway has the lowest Gibbs free energy (ΔG) compared to the 1 O 2 pathway and the Co(IV)=O pathway. Therefore, Co-S-C/CB could regulate the radical pathway of PMS. •OH and SO 4 •- are mainly responsible for the removal of Rhodamine B (RhB). Co-S-C/CB could be applied to efficiently degrade various organic pollutants and has good stability. Macro preparation of Co-S-C/CB could be achieved from both the preparation process and raw material aspects.
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高影响因子
Journal of Building Engineering
·
2025
·
IF 7.4
Juanhong Liu,Yayun Xi,Fanghui Han,Lingzhi Guo,Jinmei Hu
This study investigates the influence of aluminum incorporation on the chemical composition, morphology, silicate chain structure, and functional groups of C(-A)-S-H gel through micro- and nanoscale characterization. Based on experimental data, an atomic-scale structural model was constructed to closely reflect realistic Ca/Si and Al/Si ratios as well as Q n distributions, and to explore the effects of aluminum content on the mechanical properties and failure mechanisms of C-A-S-H at the atomic level. Results show that at low Al/Si ratios, Al can be effectively incorporated into the C-S-H gel; however, when Al/Si exceeds 0.10, Al-containing secondary phases start to precipitate. Al atoms bridge defects in silicate chains, extend the length of aluminosilicate chains, and form crosslinking structures along the z direction, with the degree of crosslinking increasing with Al content. Simulation results further indicate that Al incorporation restricts the diffusion pathways of interlayer water molecules, thereby enhancing gel structural integrity. Meanwhile, the formation of a three-dimensional crosslinking network substantially improves mechanical performance, significantly increasing Young's modulus and tensile strength in the y and z directions—especially enhancing interlayer cohesion and ductility along the z direction . Under tensile loading, stress-induced hydrolysis and bond depolymerization accelerate bond cleavage and hydroxyl formation within the C-A-S-H.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yimeng Yang,Jiaqi Lou,Duo Qi,Chengji Zhao
The rapid development of wearable electronics is driving the exploration of flexible and transparent humidity sensors . However, the limited humidity response and mechanical flexibility of sensitive materials hinder the normal operation of the device. In this research, flexible humidity sensors with a fast response time (1 s) were prepared using transparent imidazolium-based hyperbranched poly(ionic liquid)s (HPIL). The sensor performance was improved by regulating the counter anions with different hydrophobicity , such as trifluoromethanesulfonimide ion (TFSI - ). The HPIL-TFSI sensor featured an improved response under low humidity condition (6%∼33% RH) with good linearity, excellent bending humidity response, mechanical stability , and long-term stability over a wide humidity range from 6% to 98% RH. Moreover, accurate sensing was achieved for respiratory monitoring, non-contact sensing, and detecting moisture on patched skin. The HPIL-TFSI sensor paves the way for the production of high-performance wearable sensor platforms.
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高影响因子
危险品化学品经营许可证（带存储）