SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhiwei Wang,Zhi Li,Jiaojiao Bu,Juanjian Ru,Yixin Hua,Ding Wang
Cuprous sulfide (Cu 2 S) is the main composition of chalcocite and widely used in the catalyst. Deep eutectic solvents (DESs) are eco-friendly electrolytes for the separation and recycling of metals and their compounds in addition to environmental protection. In this work, choline chloride-ethylene glycol (ChCl-EG) DES is innovatively used towards one-step desulfurize cuprous sulfide to recycle copper for the first time. Cyclic voltammetry is employed to investigate the effect of initial potential, scan rate and temperature on the electrochemical behavior of Cu(I) in ChCl-EG DES. The effect of essential parameters (applied voltage, temperature and NH 4 HCO 3 ratio) on the chemical composition and microstructure of the product are discussed. Pure polycrystalline nano-Cu with an average size of ≈16.15 nm can be obtained with the current efficiency of 96.58% at the optimized parameters of 2.5 V, 353 K, 40% NH 4 HCO 3 and 10 h. The structure of Ch + is unbroken and the main existence form of Cu(I) is CuCl 2 − in the electrolyte. Mechanism analysis indicates the reduction of Cu 2 S to Cu is step-by-step with the feasible process of Cu 2 S→Cu 1.96 S→Cu 7.2 S 4 …→Cu. The S element is possibly converted and stabilized as the sulfate (SO 4 2− ) in the DES. All these findings are expected to provide new feasibility for the direct extraction and recycling of Cu from Cu 2 S with high current efficiency and less hazardous.
研究领域:
材料科学
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环境科学
·
电化学
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产品关联
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 44
·2101845
·
IF 13.281
Guilei Zhu,Guanglin Xia,Xuebin Yu
On account of easy accessibility, high theoretical volumetric capacity and dendrite-free magnesium (Mg) anode, Mg battery has a great promise to be next generation rechargeable batteries, yet still remains a challenging task in acquiring fast Mg 2+ kinetics and effective cathode materials. Herein, hierarchical 3D cuprous sulfide porous nanosheet decorated nanowire cluster arrays with robust adhesion on copper foam (Cu 2 S HP/CF), which is employed as a binder-free conversion cathode material for magnesium/lithium hybrid battery, delivering impressively initial and reversible specific capacity of 383 and 311 mAh g −1 at 100 mA g −1 , respectively, which are obviously outperformed corresponding powder cathode in a traditional method by using polymer binder, is reported. Intriguingly, benefiting from the hierarchical nanoporous array architecture and self-assembly feature, Cu 2 S HP/CF cathode shows a remarkable cycling stability with a high capacity of 129 mAh g −1 at 300 mA g −1 over 500 cycles. This work not only highlights a guide for designing hierarchical nanoporous materials derived from metal–organic frameworks, but also provides a novel strategy of in situ formation to fabricate binder-free cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Biyan Chen,Yafeng Huang,Qingguang Xiao,Tianhao Wang,Yechen Hu,Xiufang Chen,Fengtao Chen,Wangyang Lu
Copper-based agents have been utilized widely in a range of commercial antibacterial products due to their superior release-killing antibacterial properties. However, the environmental concerns associated with the release of Cu2+ ions have restricted their application in textiles. In this study, Cu3P-ZnO nanocomposites with enzyme-like properties were synthesized through the phosphating of CuO-ZnO, which were employed to functionalize the surface of cotton fabric using a dipping–padding–drying method. The physicochemical properties of the functional cotton fabrics were characterized using various techniques. The antibacterial efficacy of Cu3P-ZnO/cotton was assessed against Gram-negative E. coli and Gram-positive S. aureus bacteria. Remarkably, Cu3P-ZnO/cotton demonstrated significant antibacterial activity and stability without necessitating auxiliary conditions; achieving >99% antibacterial effectiveness against both E. coli and S. aureus, while retaining 94.7% efficiency after 50 washing cycles. The underlying antibacterial mechanism was elucidated, revealing that reactive oxygen species (ROS), especially singlet oxygen (1O2), plays a crucial role in mediating the antibacterial action of Cu3P-ZnO/cotton in absence of light, whereas direct contact between Cu3P-ZnO and bacteria serve secondary functions in this process. This research provides valuable insights into the design of ROS-mediated antibacterial agents for applications in antimicrobial textiles.
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产品关联
DOI
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Yunjie Li,Xiucai Sun,Zhenjie Cheng,Xiao Xu,Jun Pan,Xianfeng Yang,Fang Tian,Yanlu Li,Jian Yang,Yitai Qian
Transitional metal chalcogenides , one important family of promising candidates as electrode materials for sodium-ion batteries, gradually convert to Cu 2 S or Cu 2 Se in the discharge/charge processes, due to electrochemically driven copper diffusion. Thus, their performances after the electrochemical activation, actually come from copper chalcogenides . In this regard, the thorough investigation on the electrochemical properties of copper chalcogenides is important and necessary for the rational design of transitional metal chalcogenides . Here, mesoporous Cu 2-x Se nanocrystals synthesized by a simple solvothermal reaction, are used as a model. They experience the complicated intercalation reaction and the conversion reaction upon cycling, as supported by in-situ / ex-situ techniques and first-principle calculations. All these reactions are highly reversible, leading to 96.1% of the theoretical capacity. These nanocrystals preserve 88% of the initial capacity after 3000 cycles at 5 A g −1 . Even at 10 A g −1 , the capacity is still kept as 92.1% of that at 0.1 A g −1 . In full cells, the nanocrystals without any pre-sodiation and pre-activation, present a lifespan up to 2000 cycles at 0.5 A g −1 and a capacity retention about 74.2%.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
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无机化学
✓ 已验证
DOI
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Ning Li,Wenwen Zhao,Linping Li,Yangqin Gao,Lei Ge
Photocatalysts with hollow structures have drawn great interest owing to their high specific surface area, which can enhance the photocatalytic performance. Herein, we designed the hollow cubic Cu2–xS@Ni–Mo–S nanocomposites by vulcanizing from the Cu2O template and loading the Ni–Mo–S lamellas. The Cu2–xS@Ni–Mo–S composites greatly improved the photocatalytic hydrogen performance. Among them, Cu2–xS–NiMo-5 achieved the optimal photocatalytic rate of 1326.07 μmol/g h, which is approximately 3.85 times higher than that of hollow Cu2–xS (344 μmol/g h) and had good stability for 16 h. The enhanced photocatalytic property was attributed to the metallic behavior of bimetallic Ni–Mo–S lamellas and the LSPR (localized surface plasmon resonance) effect of Cu2–xS. The bimetallic Ni–Mo–S can effectively capture the photogenerated electrons and quickly transfer-diffuse to produce H2. Meanwhile, the hollow Cu2–xS not only provided many more active sites to take part in the reaction but also introduced the LSPR effect to increase the solar utilization. This work provides valuable insights into the synergistic effect of using non-precious metal co-catalysts and the LSPR materials to assist in the photocatalytic hydrogen evolution.
研究领域:
材料化学
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光催化
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能源科学
·
纳米材料
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半导体物理
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可再生能源
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表面科学
✓ 已验证
DOI
高影响因子
Theranostics
·
2020
·
IF 8.579
Beibei Shan,Haitao Wang,Linhu Li,Guangzhi Zhou,Yu Wen,Mingyang Chen,Ming Li
NIR-II plasmonic materials offer multiple functionalities for in vivo biomedical applications, such as photothermal tumor ablation, surface-enhanced Raman scattering biosensing, photoacoustic imaging, and drug carriers. However, integration of noble metals and plasmonic semiconductors is greatly challenging because of the large lattice-mismatch. This study reports the regioselective overgrowth of Cu 2-x Se on gold nanorods (GNRs) for preparation of dual-plasmonic GNR@Cu 2-x Se hybrid heterostructures with tunable NIR-II plasmon resonance absorption for in vivo photothermal tumor ablation. Methods: The regioselective deposition of amorphous Se and its subsequent conversion into Cu 2-x Se on the GNRs are performed by altering capping agents to produce the GNR@Cu 2-x Se heterostructures of various morphologies. Their photothermal performances for NIR-II photothermal tumor ablation are evaluated both in vitro and in vivo . Results: We find that the lateral one- and two-side deposition, conformal core-shell coating and island growth of Cu 2-x Se on the GNRs can be achieved using different capping agents. The Cu 2-x Se domain size in these hybrids can be effectively adjusted by the SeO 2 concentration, thereby tuning the NIR-II plasmon bands. A photothermal conversion efficiency up to 58-85% and superior photostability of these dual-plasmonic hybrids can be achieved under the NIR-II laser. Results also show that the photothermal conversion efficiency is dependent on the proportion of optical absorption converted into heat; however, the temperature rise is tightly related to the concentration of their constituents. The excellent NIR-II photothermal effect is further verified in the following in vitro and in vivo experiments. Conclusions: This study achieves one-side or two-side deposition, conformal core-shell coating, and island deposition of Cu 2-x Se on GNRs for GNR@Cu 2-x Se heterostructures with NIR-II plasmonic absorption, and further demonstrates their excellent NIR-II photothermal tumor ablation in vivo . This study provides a promising strategy for the rational design of NIR-II dual-plasmonic heterostructures and highlights their therapeutic in vivo potential.
研究领域:
材料科学
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生物医学工程
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纳米技术
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癌症治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2019
·
IF 7.467
Weiqin Wang,Yuanying Yang,Yanna NuLi,Jingjing Zhou,Jun Yang,Jiulin Wang
We fabricate in-situ carbon-encapsulated cuprous sulfide (Cu 2 S@C) composite through a metal-organic framework (MOF)-derived sulfurization method and compare its electrochemical performance as a displacement reaction cathode of hybrid Mg 2+ /Li + batteries with 0.4 mol L −1 (PhMgCl) 2 -AlCl 3 +1.0 mol L −1 LiCl/THF nucleophilic hybrid electrolyte and 0.2 mol L −1 Mg(HMDS) 2 -(AlCl 3 ) 2 –MgCl 2 +1.0 mol L −1 LiTFSI/DME non-nucleophilic hybrid electrolyte. Benefiting from the intrinsic property of Cu 2 S, well-defined hybrid porous structure and carbon encapsulation derived from MOFs, the Cu 2 S@C composite exhibits 399.2 mA h g −1 discharge capacity and the capacity maintains at approximately 150 mA h g −1 at 0.05 C after 50 cycles in the nucleophilic hybrid electrolyte. The mechanism investigation verifies that the formed Cu 1.96 S in the first discharge process succeeds to transform into MgS and Li 2 S, which results in the reversible displacement reaction dominantly occurring between Cu 1.96 S and Cu during subsequent cycles. When using the non-nucleophilic hybrid electrolyte, an enhanced cycling stability can be achieved due to the mitigation of ionic sulfide dissolution. The present work demonstrates the feasibility of building the structural design of low-cost displacement reaction cathode with more compatible electrolyte, and provides the potential of establishing practical hybrid Mg 2+ /Li + batteries for energy storage.
研究领域:
材料科学
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电化学
·
能源存储
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无机化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Yongbin Wu,Shaobo Han,Yong Li,Wenjie Shen
Monodisperse gold-copper nanocubes and AuCu-cuprous sulfide (Cu 1.96 S) heterodimers were fabricated by a step-wise polyol reduction with the aid of oleylamine and 1-dodecanethiol. The geometric configuration was mediated by simply varying the Cu/Au atomic ratio: Au-Cu cubes with sizes of 6.4 and 4.3 nm were yielded at Cu/Au atomic ratios of 1/3 and 1/1, respectively; while AuCu-Cu 1.96 S heterodimer, consisting of a AuCu cube of 4.6 nm and a Cu 1.96 S sphere of 6.3 nm was obtained at Cu/Au atomic ratio of 3/1. Detailed structural analysis on the intermediate products, collected at different intervals during the synthesis, revealed that small-sized Au seeds formed at 423 K, followed by the growth of Cu and Cu 1.96 S crystals at 473 K. Oleylamine coordinated to Au 3+ and Cu 2+ and thus mediated the particle size; while 1-dodecanethiol bonded to Au 3+ and directed the cubic morphology. Excessive Cu 2+ , at the Cu/Au atomic ratio of 3/1, interacted with 1-dodecanethiol and formed Cu 1.96 S spherical particle that epitaxially grew over the AuCu cube, resulting in a heterodimer structure. Due to the enriched surficial Cu atoms and their electronic interactions with Au atoms, Au-Cu nanocubes and AuCu-Cu 1.96 S heterodimers showed pronounced activities for the catalytic reduction of 4-nitrophenol to 4-aminophenol with NaBH 4 at 298 K.
研究领域:
材料科学
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纳米技术
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化学工程
·
催化
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Liandong Li,Ziqi Qiao,Bing Lin,Hailong Zhang,Yingying Wang,Zhe Sun,Yiping Hu,Denghao Ouyang,Shiyu Li,Hangzhou Wang,Junlei Tang,Caineng Zou
Electrolysis of neutral saline wastewater/seawater enables sustainable hydrogen production but faces sluggish hydrogen evolution reaction (HER) kinetics and poor durability in chloride-rich media. Herein, a novel Cu 2 S/Amorphous/Cu–Ni–Mo heterostructure electrocatalyst, prepared by electrodeposition and atomic layer deposition (ALD), was introduced to address these challenges. The electrode was synthesized by electrodepositing a Cu–Ni–Mo coating onto a stainless steel substrate, followed by in-situ sulfurization using ALD technology to form an amorphous layer, yielding a heterostructure with optimized interfacial properties. This heterostructure electrode exhibited an overpotential of 63.29 mV at −10 mA cm −2 and maintained stable operation at −100 mA cm −2 for over 180 h in 0.5 mol/L NaCl +1 mol/L phosphate buffered saline (PBS). A 10 cm × 10 cm electrode was successfully fabricated using this scalable method, which exhibited uniform morphology and stability exceeding 240 h. This work advances HER performance and scalability in neutral environments, facilitating industrial-scale electrocatalytic hydrogen production.
研究领域:
电化学
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材料科学
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纳米技术
·
能量转换
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催化
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jiuzhou Liu,Siwei Cao,Haoran Xu,Jiatian Song,Yichi Zhang,Jiamin Chen,Yedong Qin,Mingjie Cao,Wenjing Zhao,Qinhao Du,Zhengfeng Zhu,Huisheng Peng
Fiber solar cells present a promising power solution for wearable electronics, while fiber quantum dot-sensitized solar cells (FQDSCs) with adjustable light absorption range show great potential to efficiently harvest solar energy. However, due to the inherent difficulty in preparing high-quality active layers and enabling compact and stable interfaces on high-curvature fibers, efficient FQDSC remains unavailable. Here, a hybrid photoanode is designed by incorporating TiO 2 nanoparticle film into aligned TiO 2 nanotube arrays on a Ti wire and a hybrid counter electrode by wrapping a carbon nanotube sheet covered with Cu 2 S nanosheets on another Ti wire. The resulting FQDSC realizes sufficient light harvesting, rapid charge transport, and high structural stability, achieving a record power conversion efficiency of 11.05% that is maintained by over 90% after 1000 cycles of deformation. These FQDSCs are further integrated with fiber batteries into textiles and power a smart life-saving vest for real-time health monitoring and emergency response.
研究领域:
光伏技术
·
纳米材料
·
能量收集
·
可穿戴电子
·
太阳能转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Juan Wang,Mingzi Sun,Hongming Xu,Fengkun Hao,Qingbo Wa,Jianjun Su,Jingwen Zhou,Yunhao Wang,Jinli Yu,Penghui Zhang,Ruquan Ye,Shengqi Chu,Bolong Huang,Minhua Shao,Zhanxi Fan
Electrocatalytic carbon dioxide reduction reaction (CO2RR) toward value-added chemicals/fuels has offered a sustainable strategy to achieve a carbon-neutral energy cycle. However, it remains a great challenge to controllably and precisely regulate the coordination environment of active sites in catalysts for efficient generation of targeted products, especially the multicarbon (C2+) products. Herein we report the coordination environment engineering of metal centers in coordination polymers for efficient electroreduction of CO2 to C2+ products under neutral conditions. Significantly, the Cu coordination polymer with Cu–N2S2 coordination configuration (Cu–N–S) demonstrates superior Faradaic efficiencies of 61.2% and 82.2% for ethylene and C2+ products, respectively, compared to the selective formic acid generation on an analogous polymer with the Cu–I2S2 coordination mode (Cu–I–S). In situ studies reveal the balanced formation of atop and bridge *CO intermediates on Cu–N–S, promoting C–C coupling for C2+ production. Theoretical calculations suggest that coordination environment engineering can induce electronic modulations in Cu active sites, where the d-band center of Cu is upshifted in Cu–N–S with stronger selectivity to the C2+ products. Consequently, Cu–N–S displays a stronger reaction trend toward the generation of C2+ products, while Cu–I–S favors the formation of formic acid due to the suppression of C–C couplings for C2+ pathways with large energy barriers.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·Vol. 55
·期 6
·5221-5234
·
IF 2.4
Sun Hu,You Mengyu,Hou Yanrui,Luo Jun,Rao Mingjun,Han Guihong,Li Guanghui
The mainstream oxidative roasting method is facing challenges in processing low-grade molybdenite (MoS 2 ) concentrates, calling for deep understandings toward the behaviors of impurities. This study took pure minerals and reagents as the objects and conducted elaborate experiments and theoretical calculations into the formations of molybdates and their influences on MoS 2 oxidation. The emphasis are on the reactions under local O 2 -absent conditions and the sintering of MoS 2 caused by molybdates of Ca, Fe, Cu, or Pb. It was found that molybdates could directly form from MoO 2 or MoS 2 without O 2 at 600 °C to 650 °C, due to the promotion of reactivity and reducibility of MoO 2 when combining with impurity metals. The produced molybdates would lower the melting point, dissolve in liquid MoO 3 , and migrate to oxidation interface to form a sintering layer that inhibits O 2 diffusion. Overall, this study has discovered new pathways of molybdates formation and new effects of segregation on the sintering and established evolution patterns of bulk MoS 2 concentrate during roasting, which may be significant complements to the fundamentals of classical molybdenum metallurgy.
研究领域:
冶金学
·
材料科学
✓ 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）