ELECTROCHIMICA ACTA
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2020
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IF 6.215
Dandan Fang,Yitian Huang,Shupei Zhang,Hong Dai,Zhensheng Hong,Yanyu Lin
Herein, an ultrasensitive label-free electrochemiluminescence (ECL) immunosensor based on electrocatalytic and photothermal amplification was constructed and was applied to detect Thyroglobulin (Tg). Single-walled carbon nanotube (SWCNTs) with charming merits was used as supporter for porous NiCo 2 O 4 nanosheets (pNiCo 2 O 4 NSs), the formed pNiCo 2 O 4 NSs/SWCNTs hybrids was utilized as an effective matrix and realized multiple signal amplification. To be specific, pNiCo 2 O 4 NSs/SWCNTs hybrids on the one hand can facilitate the electron transfer and enhance ECL signal. On the other hand can catalyze the oxygen evolution reaction (OER) to increase the concentration of dissolved O 2 for further strengthening ECL signal. What’s more, the pNiCo 2 O 4 NSs/SWCNTs hybrids had a strong near-infrared harvesting capability, can convert laser energy into heat to increase the electrode surface temperature, resulting in the significant enhancement in ECL signal. Based on excellent properties of pNiCo 2 O 4 NSs/SWCNTs hybrids, a highly-efficient label-free ECL immunosensor was developed and exhibited a wide linear range (10 −5 ng/mL to 100 ng/mL) and a low detection limit (3.3 × 10 −6 ng/mL) for Tg determination, which was approximately 7.1 fold-lower than at room temperature . This work provided a new thought for high-performance ECL sensing platform construction.
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高影响因子
JOURNAL OF POWER SOURCES
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2020
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IF 8.247
Chi Zhang,Zhuohong Xie,Wanfeng Yang,Yi Liang,Dingding Meng,Xin He,Ping Liang,Zhonghua Zhang
Low electronic conductivity and drastic volume change during cycling of transition metal oxides , as anodes for lithium ion batteries (LIBs), lead to rapid capacity decay and poor structural stability. Herein, nanostructured NiCo 2 O 4 anchored on carbon sheets was synthesized by a facile hydrothermal method with following thermal treatment. The wrinkled carbon substrate in the composite derives from the carbonization of pomelo peels, which can be mass-produced for the large-scale application. This composite shows mesoporous structures with high specific surface areas and intimate NiCo 2 O 4 /carbon interfaces, which favors the alleviation of the volume expansion/shrink during charging/discharging process and improves the electron/mass transport, enhancing the capability and stability for LIBs. This composite delivers a high reversible capacity of 473.7 mA h g −1 after 210 cycles at a current density of 500 mA g −1 . A long cycle life of up to 1100 cycles at 2000 mA g −1 is achieved with the retention capacity of 363 mA h g −1 . The electrode also exhibits excellent rate capability and can regain its original capacities as reversing to the low current densities . This work highlights the biomass-derived carbon-supported metal oxides as an environmentally friendly and economic strategy for advanced LIBs.
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高影响因子
International Journal of Electrochemical Science
·
2023
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IF 1.5
Lifei Zhi,Shushan Yao,Eezhuang Zhang,Mingang Zhang
Micro–nanostructured NiCo 2 O 4 with controllable in situ growth on foam nickel has been successfully realized by introducing different surfactants as soft templates. Herein, several self-supporting NiCo 2 O 4 /NF electrode materials with different dimensions, different morphologies, and excellent electrochemical properties were prepared. The effects of the surfactant type, structure, and reaction conditions on the morphologies, structures, and electrochemical properties of the materials were studied in detail. The results show that NiCo 2 O 4 materials can regulate the formation of flake and fibrous structures of different sizes using a linear anionic surfactant. With the increase in temperature, the cationic surfactant (DMHAC10) can regulate the formation of flake → cactus → fibrous structure. Also, the Gemini cationic surfactant (GC-A) can regulate the formation of flake → cactus ball → urchin-like → fibrous structure. The growth of NiCo 2 O 4 on NF was prevented due to nonionic surfactants. Counter ions only affect the size of the material structure, but the material morphology is unaffected, and the surfactant concentration slightly affects the material morphology. The results of the electrochemical properties showed that the cactus ball NiCo 2 O 4 /NF material of a three-dimensional multistage structure was prepared by adding GC-A at 120°C for 6 h. The prepared material has excellent electrochemical properties such as higher specific capacity (4.74 F/cm 2 ), better charge–discharge ratio, and better cycle stability.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Chulei Zhao,Chaoyun Ma,Fuping Zhang,Wenjun Li,Chenglin Hong,Fuxi Bao
Luminol has garnered significant attention from analysts as one of the most effective and commonly used electrochemiluminescence (ECL) reagents. However, the efficient luminescence of luminol anode is limited by the excitation of various reactive oxygen species (ROS). Typically, ROS are generated through co-reactive reagents and dissolved oxygen. Unfortunately, the former suffers from two drawbacks, namely biotoxicity and instability, while the latter cannot offer sufficient oxygen due to its limited solubility in aqueous solutions. Consequently, a low decomposition rate is usually obtained, leading to insufficient ROS. Therefore, there is an urgent need to develop efficient luminol anode systems. This study focuses on the use of zeolitic imidazolate framework-67 (ZIF-67) as a template, employing a controlled chemical etching method to create a ZIF-67/Ni-Co-layered double hydroxide (LDH). The intermediate composite is then annealed in air, resulting in the formation of a Co 3 O 4 /NiCo 2 O 4 double-shelled nanobox (DSNB) heterostructure . Due to its structural advantages, the DSNB exhibits excellent electrocatalytic performance in the oxygen evolution reaction (OER). Furthermore, it was found that both the intermediates and products of OER can directly participate in the luminol chemiluminescence process, ultimately resulting in a 700-fold increase in the electrochemiluminescence (ECL) signal compared to an equal molar concentration of luminol solution. This work not only establishes the OER-mediated ECL system but also deepens the understanding of the relationship between ROS and luminol, providing a new pathway to study the luminol anodic ECL luminescence system.
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高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 12
·5416-5426
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IF 3.5
Xuan Liao,Xiaolong Hou,Caini Yi,Guimiao Wang,Shuo Wang,Ying Yang,Changguo Chen,Danmei Yu,Yuping Liu,Xiaoyuan Zhou
The development of an electrochemical energy storage system with exceptional performance is an important way to address the energy crisis and environmental pollution of the modem world. In this study, an NiCo2O4@MnS composite with a unique hierarchical structure has been successfully synthesized on an NF substrate using the hydrothermal–electrodeposition method. The results indicate that NiCo2O4@MnS possesses superior specific capacitance and excellent cycling stability. At a current density of 2 A g−1, its specific capacitance can reach 2100 F g−1, while the capacitance retention is still 76% after 10 000 cycles at 10 A g−1. Moreover, when the current density is 1 A g−1, the assembled NiCo2O4@MnS//AC device can deliver a specific capacitance of 203 F g−1, and the energy density is up to 55 W h kg−1 at a power density of 697 W kg−1. These outstanding electrochemical properties of NiCo2O4@MnS can be ascribed to the increase in ion diffusion, specific surface area and electronic conductivity due to its unique hierarchical structure and introduction of MnS.
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高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2017
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IF 3.204
Qifu Huang,Wenzhi Li,Qizhao Lin,Xusheng Zheng,Haibin Pan,Dong Pi,Chunyu Shao,Chao Hu,Haitao Zhang
In this paper, the catalyst of Pd–NiCo 2 O 4 /SiO 2 was prepared and applied to the catalytic combustion of lean methane. Pd and NiCo 2 O 4 nanoparticles were uniformly distributed on the SiO 2 support, so that every Pd or NiCo 2 O 4 nanoparticle was separated from each other by another component. Comparing with Co 3 O 4 /SiO 2 , NiCo 2 O 4 /SiO 2 , Pd–Co 3 O 4 /SiO 2 and Pd#NiCo 2 O 4 /SiO 2 (catalysts without uniform distribution of Pd and NiCo 2 O 4 nanoparticles), Pd–NiCo 2 O 4 /SiO 2 had the highest catalytic activity in the catalytic combustion of lean methane, with a methane total conversion temperature at 378 °C. In addition, the high activity did not decrease during the long time reaction, which showed good thermal stability . TEM and BET results showed that the nanoparticle sizes of Pd and NiCo 2 O 4 were very small. The XRD patterns indicated that the Pd nanoparticles were highly dispersed on the surface of SiO 2 . The XPS spectra demonstrated the formation of NiCO 2 O 4 , the presence of enough active oxygen species on the catalyst surface and the high ratio of PdO/Pd 0 . The enhanced influence of Ni introduction was also proved by comparison tests. All these results indicated that the high catalytic activity of Pd–NiCo 2 O 4 /SiO 2 mainly comes from the nanoparticle distribution and the Ni cation enhancement.
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CHEMICAL PHYSICS
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2024
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IF 2
Mingyang Gao,Shicheng Wang,Zexuan Wang,Simeng Wang,Yushu Sun,Qianyun Li,Sen Lei,Qiang Li,Zhiyong Zhang,Xiaolong Ma,Wu Zhao
This study addresses a scientific challenge by elucidating the influence of calcination temperature on the properties and electromagnetic wave absorption capabilities of NiCo 2 O 4 , a material whose performance is inherently tied to its preparation process. Specifically, we systematically investigate how varying calcination temperatures not only diversify the material’s composition and morphology but also enhance its electromagnetic wave absorption properties. By controlling the calcination temperature, we not only achieve the successful synthesis of NiCo 2 O 4 but also unravel intricate correlations among calcination conditions, material composition, and wave absorption performance. Notably, NiCo 2 O 4 sample calcined at 400 °C exhibits remarkable electromagnetic wave absorption, marked by an exceptional maximum reflection loss of −53.93 dB and a broad absorption bandwidth spanning 6.24 GHz. These insights contribute to advancing the frontiers of NiCo 2 O 4 utilization, particularly in the realm of electromagnetic wave absorption and beyond, underscoring the novelty and impact of our research.
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高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Jingjing Xie,Wei Jiang,Fei Tang,Ying Gao,Hongyu Li,Jiyang Li,Deyang Zhao,Zhiqiang Lv,Zhenglong Yang,Yanbin Xu
La 2 O 3 doped hollow porous Ni/NiCo 2 O 4 /C microspheres (NCO-La) are prepared by solvothermal method. The doping of porous La 2 O 3 nanoparticles is crucial to reduce the crystalline grain size of NiCo 2 O 4 and the internal resistance of the electrode, which facilitates ionic and electronic transportation efficiency. Hollow porous NCO-La microspheres with carbon networks have good mechanical strength and can effectively suppress volume expansion and aggregation. The combination of high-conductivity carbon and metallic nickel improves electronic conductivity. The nanostructure in the composite microspheres brings abundant active sites, which facilitates rapid redox of metal ions and allows rapid insertion and removal of Li + , consequently effectively improving the specific capacity. Benefiting from the synergy of well-designed nanostructure, the material shows high Li + storage performance and good stability. At 0.2 A g −1 after 250 cycles, the discharge specific capacity of NCO-La0.1 (1596.2 mAh g −1 ) is far better than NiCo 2 O 4 (655.6 mAh g −1 ) without La 2 O 3 doping. Such design concept of nanostructures provides a promising way to develop high-performance anode materials for LIBs.
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高影响因子
Journal of Cleaner Production
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2024
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IF 9.7
Chun Wang,Bai-Hang Zhao,Bao-Yu Zhang,Yi-Hao Zhu,Ye Li
The presence of antibiotics in wastewater threatens the human living environment. Activated peroxymonosulfate (PMS) method is often used for catalytic degradation of antibiotics. However, how to reduce catalyst cost and ensure efficient degradation of antibiotics at the same time is a sticky issue for the activated PMS method. Two-dimensional vermiculite flakes (2D-VMT) is cost-effective and can be used as catalyst carriers for PMS activation. Hence, we exfoliated 2D-VMT from natural vermiculite and prepared NiCo 2 O 4 loaded 2D-VMT (NiCo 2 O 4 /2D-VMT) catalyst. Levofloxacin (LVX), as a normal antibiotic , was used to evaluate the catalytic capacity of NiCo 2 O 4 /2D-VMT in PMS systems. Also, LVX degradation mechanism through NiCo 2 O 4 /2D-VMT activated PMS were explored here. XRD , EDS, TEM, and HRTEM analysis all demonstrated NiCo 2 O 4 nanoparticles were successfully anchored on 2D-VMT. NiCo 2 O 4 /2D-VMT had a high specific surface area and abundant active sites. The NiCo 2 O 4 /2D-VMT/PMS system, with a 15% mass ratio of NiCo 2 O 4 to 2D-VMT (15%-CN/2D-VMT), achieved LVX removal efficiency of 87% and LVX removal rate of 0.034 min −1 . 1 O 2 and SO 4 · - were the major ROS for LVX degradation. The reversible redox cycle between Co(III)/Co(II) and Ni(III)/Ni(II) played a crucial role in activating PMS to generate ROS for LVX degradation process. Also, based on intermediates identification by LC-MS, possible degradation pathways of LVX were proposed and their ecotoxicological evolution was assessed by using the ECOSAR software. 15%-CN/2D-VMT may be a worth recommended loaded catalyst for antibiotics removal in environmental remediation, owing to its high reusability and excellent renewability.
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高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 37
·15648-15659
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IF 3.5
Song-Lin Xu,Shi-Rong Wang,Dongmei Ma,Rui-Yu Li,Jun Xiang,Rong-Da Zhao,Fu-Fa Wu
ZnWO4@NiCo2O4 core–shell nanosheet array composites are synthesized on nickel foam via a two-step hydrothermal method. The optimal conditions, including a Ni(NO3)2·6H2O to Co(NO3)2·6H2O molar ratio of 2 : 1, 12 hours reaction time, and 120 °C temperature, yield a specific capacitance of 875 C g−1 at 1 A g−1. The electrode also maintains 81.1% capacitance after 10 000 cycles. The material's performance is attributed to its core–shell structure, which enhances ion diffusion and electron transport. This study presents a viable approach for high-performance supercapacitor electrodes.
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高影响因子
FIBERS AND POLYMERS
·
2025
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IF 2.3
Yan Zhiqi,Li Xinmei,Yang Rui,Jia Liming
To address the global challenge of fossil fuel consumption, a self-supporting supercapacitor electrode material was successfully fabricated to enable efficient utilization of renewable energy. In this study, lignin/polyacrylonitrile (PAN) carbon nanofibers (LCNFs), prepared via electrospinning, served as a conductive scaffold and growth substrate. This enabled the in situ growth of NiCo 2 O 4 and CeO 2 , co-constructing a composite electrode material (denoted as CeO 2 /NiCo 2 O 4 @LCNFs) characterized by a petal-like nanosheet architecture. Results indicate that, compared to LCNFs, this uniquely structured composite enhances the exposure of active sites and facilitates charge and ion transport, thereby leading to significantly improved electrochemical performance. Furthermore, the influence of varying Ce content on the morphology, structure, and electrochemical properties of the composite was investigated. The CeO 2 /NiCo 2 O 4 @LCNFs composite exhibited optimal morphology and electrochemical properties when the Ce addition amount was 0.5 mmol. It delivered a specific capacitance of 643.6 F g -1 (at 0.5 A g -1 ) and maintained a capacitance retention of 82.07% after 5000 cycles at 5 A g -1 . These results demonstrate the promising application potential of this electrode material and offer new perspectives for the development of novel electrode materials.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
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IF 5.532
Xiao-Fei Zhang,Xiao-Hua Zuo,Wen-Jun Zhu,Pei-Lin Che,Da-Wei Shi,Shun-Sheng Chen
Nano-sized NiCo 2 O 4 powders were prepared by a facile hydrothermal method . The phase structure, particle morphology , specific surface area and pore size distribution of the powders were examined as a function of their calcination temperature. In view of utilization in supercapacitors , the electrochemical properties of the electrodes prepared from the powders were investigated by means of cyclic voltammetry , galvanostatic charge-discharge and electrochemical impedance spectroscopy techniques. In addition, the electrochemical properties of the electrodes were tentatively interpreted with respect to the kinetics parameters of electrons and ions involved in the electrode reaction. The NiCo 2 O 4 powder calcined at 350 °C displayed nanorod morphology (30–50 nm in diameter and 200–400 nm in length) and optimal electrochemical properties among the investigated specimens. The electrode prepared from the powder displayed an outer voltammetric charge of 113 C/g and a charge transfer resistance of 0.39 Ω together with a specific capacitance of 343 C/g under current density of 1 A/g and a capacitance retention of 108% after 5000 charge/discharge cycles measured at 20 A/g.
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