RSC Advances
·
2014
·Vol. 4
·期 86
·46208-46213
·
IF 3.708
Yuqing Lin,Lianglu Hu,Linbo Li,Keqing Wang
This study describes a facile and effective one-pot route to synthesize structurally uniform and electrochemically active nickel hydroxide–graphene nanocomposites (Ni(OH)2–GN) and investigates the electrocatalytic activity toward the oxidation of insulin. Graphene here was used to tether Ni2+ precursor onto surfaces and eventually grow Ni(OH)2 nanoparticles to form hybrid materials. The synthetic Ni(OH)2–GN nanocomposite has a uniform surface distribution, which was characterized with scanning electron microscopy (SEM). Moreover, the composition of synthetic Ni(OH)2–GN nanocomposite was characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR spectra). The Ni(OH)2–GN were electrochemically treated in 0.1 M NaOH solution through cyclic voltammograms, and then gradually transited into nickel oxyhydroxide–graphene nanocomposites (NiOOH–GN), which demonstrated high catalytic activity and improved stability to insulin oxidation. The steady-state current response increases linearly with insulin concentration from 800 nM to 6400 nM with a fast response time of less than 2 s and a detection limit of 200 nM. The excellent performance of insulin sensor, including long term stability, can be ascribed to the synergistic effects of the large surface area (resulting in high loading ability), dispersing ability and conductivity of graphene and the large surface-to-volume ratio and electrocatalytic activity of Ni(OH)2 nanoparticles.
研究领域:
生物医学工程
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电化学传感
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纳米医学
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糖尿病诊断
·
分子诊断
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高影响因子
Advanced Energy Materials
·
2026
·
IF 25.5
Ahui Zhu,Ersha Fan,Xiaodong Zhang,Renjie Chen,Li Li
High-value recycling of retired lithium-ion battery materials is pivotal for the circular economy. The nickel-rich strategy, with its merits in boosting energy density, stands out as a key approach for upcycling spent LiNi 0.54 Co 0.16 Mn 0.3 O 2 (SNCM). However, the inherent structural defects of SNCM and the heterogeneous reactions among precursors during regeneration jointly induce irreversible phase transformations, preventing the formation of an ideally ordered layered structure. Therefore, we developed a targeted bidirectional anchoring strategy involving pre-anchoring Al species on both SNCM and Ni(OH) 2 surfaces. This method reduces the energy barrier for lithiation in the surface-disordered structures of SNCM and suppresses the structural degradation of nickel-rich intermediate phases, thereby addressing the root cause of structural disorder during upcycling. The upcycled cathode material exhibits a stable layered structure and a distinctive nickel concentration gradient from the surface toward the bulk. It delivers outstanding electrochemical performance, including a reversible capacity of 186.84 mAh g −1 at 0.2C and retaining 90.17% of its initial capacity after 200 cycles at 1C, outperforming current commercial materials. Furthermore, this study provides essential insights into solid-state regeneration and establishes a pathway toward the high-value recycling of degraded lithium-ion batteries, demonstrating great potential for practical application.
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ACS Nano
·
2026
·Vol. 20
·期 30
·20998-21012
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IF 17.3
Zhan Feiyang,Bian Zongkun,Chen Qingqing,Wu Xi,Zou Qingxin,Yun Ruirui,Zhang Haimin,Zhang Yunxia,Zhao Huijun
The rapid iteration and imminent retiring tide of lithium-ion
batteries
(LIBs) call for the sustainable upcycling of degraded low-Ni cathodes
into ultrahigh-Ni cathodes, meanwhile addressing their inherent interfacial
and bulk structural instability to meet the ever-increasing pursuit
for next-generation LIBs. Herein, an upcycling strategy based on surface-to-bulk
engineering is demonstrated to upgrade spent low-Ni cathodes (LiNi 0.33 Co 0.33 Mn 0.33 O 2 , NCM111)
into single-crystalline ultrahigh-Ni cathodes (LiNi 0.9 Co 0.05 Mn 0.05 O 2 , NCM90) featuring Hf/B homogeneous
bulk doping and Li 2 HfO 3 coating (denoted as
U-NCM90HB). Notably, B doping enables to reinforce the stability of
the oxygen framework, while Hf doping with its larger ionic radius
triggers the “pinning effect” within the layered structure
and inhibits planar gliding and cracks. Further, the in situ formed Li 2 HfO 3 coating reduces residual lithium
compounds on the surface, facilitates the rapid diffusion of Li + , and alleviates side reactions at the cathode interface.
As expected, the upcycled cathode exhibits significantly improved
performance as compared to commercial counterparts, sustaining stable
cycling with 89.3% retention after 100 cycles at 0.5 C and delivering
a high capacity of 174 mAh g –1 at 5 C. The upcycling
method presented here can inspire a broad set of engineering potentials
for the sustainable and value-added upcycling of spent ternary layered
oxide cathodes.
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高影响因子
Foods
·
2026
·Vol. 15
·期 17
·3002
·
IF 6
Min Li,Yulin Wang,Huajuan Yin,Xu Jing,Yunlong Li
Triazole fungicides (TFs) are widely used in cereal production due to their potent fungicidal activity and broad-spectrum efficacy. Nonetheless, residues of TFs in food products may pose risks to food safety and human health. Therefore, the development of efficient and environmentally friendly sample preparation methods is paramount for the reliable determination of TFs. Herein, a novel green solvent-based dispersive liquid–liquid microextraction method coupled with high-performance liquid chromatography (DLLME-HPLC) was developed for the determination of TFs in cereal samples. The prepared magnetic deep eutectic solvents (MDESs), composed of nonanoic acid and ferric hydroxide, served as green, magnetically responsive extraction solvents, enabling rapid magnetic separation without centrifugation. Four bio-based solvents (BBSs) were investigated as green dispersive solvents to facilitate the dispersion of MDESs and replace conventional toxic organic dispersants, thereby further enhancing the environmental sustainability of the extraction procedure. Owing to the combined effects of hydrophobic interactions, hydrogen-bonding networks, and magnetic responsiveness, the proposed method achieved efficient extraction and rapid phase separation while minimizing solvent consumption and operational complexity. The greenness of the method was evaluated using multiple green analytical chemistry metrics, confirming its low environmental impact, reduced waste generation, and improved operational safety compared with conventional DLLME procedures. Under optimized conditions, the method was successfully applied to determine TFs in rice, wheat, corn, buckwheat, and oat samples, achieving recoveries ranging from 75.0% to 101.9% and relative standard deviations of 1.6–4.8%. The developed DLLME method provides a rapid, sensitive, and environmentally friendly strategy for cereal pesticide residue analysis and expands the application of MDESs and BBSs in green sample preparation.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yuheng Guo,Min Yue,Chao Wu
Addressing the dual challenges of sustainable energy conversion and battery waste management, this work develops a mechanochemistry-assisted strategy to upcycle spent lithium-ion battery cathodes. The approach directly converts them into highly efficient oxygen evolution reaction (OER) catalysts. Through controlled reconstruction, the cathode material becomes a defect-rich transition metal hydroxide phase with abundant charge transfer states. The resulting catalyst shows excellent OER performance, which achieves a low overpotential of 253 mV at 10 mA cm −2 geo and maintains high stability in alkaline media. In situ Raman and X-ray absorption spectroscopy reveal that the high activity comes from dynamically formed NiOOH species during operation condition. Meanwhile, the stable Co/Mn coordination and inherent defects ensure long-term durability. Compared with conventional Ni(OH) 2 , the restructured catalyst exhibits better structural integrity under prolonged operation. This study presents a novel strategy for battery reclamation and the design of cost-effective, high-performance electrocatalysts for water splitting.
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Materials
·
2023
·Vol. 16
·期 8
·3079
·
IF 3.4
Lifan Wang,Qinling Shi,Chun Zhan,Guicheng Liu
Ni-rich cathodes are expected to serve as critical materials for high-energy lithium-ion batteries. Increasing the Ni content can effectively improve the energy density but usually leads to more complex synthesis conditions, thus limiting its development. In this work, a simple one-step solid-state process for synthesizing Ni-rich ternary cathode materials NCA (LiNi0.9Co0.05Al0.05O2) was presented, and the synthesis conditions were systematically studied. It was found that the synthesis conditions have a substantial impact on electrochemical performance. Furthermore, the cathode materials produced through a one-step solid-state process exhibited excellent cycling stability, maintaining 97.2% of their capacity after 100 cycles at a rate of 1 C. The results show that a one-step solid-state method can successfully synthesize Ni-rich ternary cathode material, which has great potential for application. Optimizing the synthesis conditions also provides valuable ideas for the commercial synthesis of Ni-rich cathode materials.Keywords:lithium-ion batteries;Ni-rich cathode materials;one-step solid-state synthesis;electrochemical performance
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Donglei Yu,Zhizhang Yuan,Xianfeng Li
Cost-effective and high-performance nickel-based batteries are well-suited for energy storage. However, the application of most nickel-based batteries such as alkaline zinc-nickel flow battery is hindered by volume expansion and oxygen evolution side reaction of nickel cathode. Herein, we propose an “Inside-out” strategy to address these issues by in-situ electroless plating of uniform nickel phosphide on nickel cathode for the zinc-nickel flow battery. The nanoscale nickel phosphide alloy with high electronic conductivity (4.4 × 10 -3 S m −1 ) can validly restrain the formation of overcharged production (γ-NiOOH) and volume expansion of nickel cathode. The alkaline zinc-nickel flow battery using the modified cathode demonstrates a coulombic efficiency of 98.7 % and a voltage efficiency of 86.2 % at a current density of 40 mA cm −2 , along with significant suppression of oxygen evolution side reaction (<50 ppm). This work may inspire the development of high-performance nickel cathodes, which are highly desirable to achieve high-performance nickel-based batteries.
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Advanced Science
·
2023
·Vol. 10
·期 26
·2301872
·
IF 15.1
Yuanzheng Long,Cheng Yang,Yulong Wu,Bohan Deng,Ziwei Li,Naveed Hussain,Kuangyu Wang,Ruyue Wang,Xian He,Peng Du,Zeliang Guo,Jialiang Lang,Kai Huang,Hui Wu
The increasing demand for clean energy conversion and storage has increased interest in hydrogen production via electrolytic water splitting. However, the simultaneous production of hydrogen and oxygen in this process poses a challenge in extracting pure hydrogen without using ionic conducting membranes. Researchers have developed various innovative designs to overcome this issue, but continuous water splitting in separated tanks remains a desirable approach. This study presents a novel, continuous roll-to-roll process that enables fully decoupled hydrogen evaluation reaction (HER) and oxygen evolution reaction (OER) in two separate electrolyte tanks. The system utilizes specially designed “cable-car” electrodes (CCE) that cycle between the HER and OER tanks, resulting in continuous hydrogen production with a purity of over 99.9% and Coulombic efficiency of 98% for prolonged periods. This membrane-free water splitting system offers promising prospects for scaled-up industrial-scale green hydrogen production, as it reduces the cost and complexity of the system, and allows for the use of renewable energy sources to power the electrolysis process, thus reducing the carbon footprint of hydrogen production.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhongzeng Zhou,Luojun Wang,Jing Wang,Conghui Liu,Tailin Xu,Xueji Zhang
Nonenzymatic biosensors hold great potential in the field of analysis and detection due to long-term stability, high sensitivity, and low cost. However, the relative low selectivity, especially the overlapped oxidation peaks of biomarkers, in the biological matrix severely limits the practical application. In this work, we introduce an intelligent back-propagation neural network into nonenzymatic electrochemical biosensing to overcome the limitation of low selectivity for glucose and lactate detection. After simple electrodeposition and dropping modification, three working electrodes with distinct characters are fabricated and integrated into electrochemical microdroplet arrays for glucose and lactic acid detection. By analyzing chronoamperometry data from a standard mixture of glucose and lactate in varying concentrations, a database of highly selective detection can be simply established. The trained neural network model can reliably identify and accurately predict the concentration of glucose and lactic acid in the range of 0.25–20 mM with a correlation coefficient of 0.9997 in multianalyte mixtures. More importantly, the predicted results of serum samples are precise, and the relative standard deviation is less than 6.5%, proving the possible applicability of this method in real scenarios. This innovative method to enhance selectivity can avoid complex material synthesis and selection, and the highly specific nonenzymatic electrochemical biosensing platform paves the way for intelligent and precise point-of-care detection in long-term and is of low cost.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Qian-Yu Wang,Sian-Hong Ong,Zi-Ye Liu,Zhong-Wei Zhang,Quan-De Li,Ji-Ming Hu
Conductive graphene nanosheets boost oxygen evolution electrocatalysis. • Electrochemically assisted deposition forms porous Ni(OH) 2 /NiO onto freestanding graphene. • Low overpotential of 260 mV at 10 mA cm −2 and Tafel slope of 41 mV dec −1 . • Macroscopic model indicates faster *OOH formation with transfer coefficient of 0.74 Developing low-cost oxygen evolution reaction (OER) catalysts with efficient charge transport and accessible active sites is essential for alkaline water electrolysis. Here we report an electrochemically assisted technique (EAT) to deposit highly dispersed Ni(OH) 2 species on the surface of freestanding graphene (Gr) without deliberate surface functionalization, where a transient SiO 2 -derived framework assists the deposition process of Ni(OH) 2 , followed by heat treatment and alkaline etching to form an intimately contacted Gr@eNi(OH) 2 -NiO composite. On one hand, Gr enables the highly dispersed distribution of Ni(OH) 2 /NiO species and improves the accessibility of active sites for the OER. On the other hand, Gr provides good electrical conductivity and rapid charge-transfer kinetic, leading to high catalytic activity. In 1 M KOH, Gr@eNi(OH) 2 -NiO delivers an overpotential of 260 mV at 10 mA cm −2 and Tafel slope of 41 mV dec −1 , together with stable operation in alkaline electrolyte. Macroscopic kinetics analysis based on current-overpotential fitting further suggests an enhanced potential response of the *OOH-forming step, consistent with improved OER kinetics enabled by Gr-deposit coupling. This work provides a practical route to integrate Ni hydroxide/oxide phases with Gr scaffolds for efficient alkaline water oxidation. Download: Download high-res image (334KB) Download: Download full-size image
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DYES AND PIGMENTS
·
2026
·
IF 3.9
Ke Cheng,Tianyi Ma,Luoyilan Zhang,Hao Xue,Yin Yuan,Hong Zheng,Bin Liu
Coreopsis S/P-CDs from a CL sensor. • CL sensor detects Sudan III with 1.0 μM LOD. • Recoveries of 97.4% to 105.0% in real samples. A novel chemiluminescence sensor for Sudan III detection was developed using sulfur/phosphorus-doped carbon dots (S/P-CDs) synthesized from Coreopsis. Combined TEM, XPS, and FTIR analyses verified that the S/P-CDs exhibit uniform spherical morphology with well-resolved lattice fringes, successful S and P doping at atomic percentages of 3.6% and 1.7%, respectively, and abundant surface functionalities (including PO 4 3− and C O groups) that confer excellent water dispersibility and chemical reactivity. The S/P-CDs significantly enhanced the CL intensity of the acidic KMnO 4 -HCHO system. Under optimal conditions, the CL intensity was linearly correlated with the Sudan III concentration over the range of 5-100 μM, achieving a detection limit of 1.0 μM. The method was successfully applied to real samples, with recoveries of 97.4% to 105.0%, enabling rapid, convenient detection in food. Download: Download high-res image (366KB) Download: Download full-size image
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Tungsten
·
2023
·
IF 6.6
Fu Yi-Han,Peng Yuan-You,Zhao Lei,He Tian-Qi,Yuan Mei-Mei,Dang Hao,Liu Rui,Ran Fen
Vanadium nitride (VN) has received significant attention as a potential negative electrode material due to its remarkable theoretical and physical properties. However, the electrochemical performance needs to be improved due to its low specific surface area and the issue of being easily dissolved in electrolyte. Researches have shown that the composite structure of carbon-coated nanoscale VN particles could significantly increase the specific surface area of VN, and more importantly, and the carbon matrix can effectively restrain the dissolution of VN particles in the electrolyte, thereby improving its chemical and electrochemical performance, including specific capacity and cycling stability. Herein, VN quantum dots are synthesized and protected by uniformly coating the carbon skeleton on its surface via an in situ strategy of oxidation initiation, which initiates dopamine polymerization, forming a crystalline complex of polydopamine and vanadium. After heat treatment, the product is a composite material with VN quantum dots embedded in the amorphous carbon skeleton. The resulting small-sized and crosslinked carbon particles formed a graded pore structure, more reasonable channels provided for electrolyte ions transport quickly. When the composite material was used as the negative electrode material for supercapacitors, it exhibits the specific capacity of 391.9 F·g −1 at a current density of 0.5 A·g −1 and excellent capacity retention rate of 83.6% after 5000 cycles. The synthesis method of this quantum dot could be applied to other metal compounds and has potential applications in catalysis, environmental protection, and other fields.
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