NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 36
·16972-16980
·
IF 3.3
Yan Shang,Jing Xu,Yue Ma,Zezhong Li,Qian Li
The Mn0.2Cd0.8S/NiCo2S4 was prepared using an electrostatic self-assembly method. It was confirmed by analyses of the crystal structure, morphology, and elemental composition. The photoelectrochemical measurement confirmed that Mn0.2Cd0.8S and NiCo2S4 had a close interaction and can form a Schottky barrier. The construction of the Schottky junction speeded up the transport of the photogenerated electrons and inhibited the recombination of the photogenerated electrons and holes. Using Mn0.2Cd0.8S/NiCo2S4, the amount of hydrogen production was higher than with NiCo2S4 and Mn0.2Cd0.8S alone. Different amounts of NiCo2S4 were loaded onto Mn0.2Cd0.8S for the photocatalytic hydrogen production reaction. The hydrogen photocatalytic hydrogen production of Mn0.2Cd0.8S/NiCo2S4-3 was 28.97 times higher than of the Mn0.2Cd0.8S. The Mn0.2Cd0.8S/NiCo2S4 composite exhibited excellent photocatalytic activity and stability, which provided reference values for exploring bimetallic sulfide composite materials, and demonstrated great potential in photocatalytic applications.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Chengqian Duan,Yuhua Dong,Qinglin Sheng,Jianbin Zheng
A non-enzymatic electrochemical sensor-NiCo 2 S 4 /GCE was constructed for sensitive and selective detection of hydrazine (N 2 H 4 ), which was designed based on porous nanostructure and synthesized through a facile hydrothermal method . The nanocomposite has been characterized using a series of characterizations such as X-ray powder diffraction (XRD), scanning electron microscopic (SEM), transmission electron microscopy (TEM), showing the porous NiCo 2 S 4 sphere was made of interconnected nanoparticles with porous structure. Electrochemical measurements revealed that the porous NiCo 2 S 4 sphere based sensor exhibited an excellent voltammetric response towards the N 2 H 4 oxidation with a wide linear range of 1.7 μM to 7.8 mM, a low detection limit of 0.6 μM (S/N = 3), a sensitivity of 179.1 μA mM −1 cm −2 . Moreover, determinations of N 2 H 4 in tap water samples were carried out by standard addition. Acceptable results with relative standard deviation of 2.1–3.0% and recovery of 95.20–103.6% were obtained for five parallel measurements. Therefore, NiCo 2 S 4 /GCE promised to be a new platform for electrochemical detection of N 2 H 4 .
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 1
·1-12
·
IF 2.8
Lu Xi,Meng Yanshuang,Wang Xin,Xiao Mingjun,Xu Yishan,Zhu Fuliang
Uniformly distributed NiCo 2 S 4 nanoparticles on hollow carbon spheres were prepared by carbonisation and in-situ vulcanisation methods as a positive electrode host for lithium–sulphur batteries. Among them, carbon hollow spheres can provide a huge internal cavity, which prevents volume expansion during the charge and discharge process. At the same time, the physically limit the dissolution of polysulfides in the electrolyte and can also provide high conductivity. The NiCo 2 S 4 nanoparticles on the surface can establish a specific polar environment for charge and discharge and can interact with polysulfides to mitigate the loss of active materials through chemical adsorption. Under the synergistic effect of NiCo 2 S 4 and carbon hollow spheres, the electrode with a special structure of NiCo 2 S 4 /carbon hollow spheres as sulfur host exhibits excellent long cycle performance. At a current density of 335 mA g −1 , it still has a high discharge specific capacity of 526 mAh g −1 after 500 cycles.
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiang Li,Shifeng Yin,Lei Cai,Zilong Wang,Chengyong Zeng,HaoJie Jiang,Jie Cheng,Wei Lu
The development of electromagnetic wave absorbing materials with lightweight and high absorption capacity is an effective way to solve electromagnetic wave pollution. Although the two-dimensional MXene material has become one of the most attractive electromagnetic wave absorbing materials due to its unique structure, the poor impedance matching makes it difficult to obtain both lightweight and efficient absorption capacity. Herein, few-layer MXene sheets and sea-urchin-like NiCo 2 S 4 (NCS) hybrids were successfully synthesized by a simple electrostatic self-assembly method. MXene/NCS hybrids achieve good absorption performances. The maximum absorption bandwidth is 5.6 GHz at a matching thickness of only 1.53 mm with a filling ratio of only 10 wt%. In addition, the excellent microwave absorption performance is attributed to the improved impedance matching of MXene and the synergistic effects of dielectric loss and interfacial polarization. This work provides new ideas for the design and synthesis of materials with lightweight and efficient electromagnetic wave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 29
·10375-10388
·
IF 8.307
Congyu Zhou,Zhengjun Yao,Bo Wei,Wenying Li,Zhejia Li,Xuewei Tao,Jintang Zhou
The increasing hazard of electromagnetic radiation prompts people to pursue absorbing materials with better performance. However, absorbing materials with a single loss mechanism usually is unable to obtain better absorbing performance due to low impedance matching or high filling ratio. Therefore, this work proposes a C/NiCo2S4 (CNCS) material with both dielectric loss/magnetic loss to achieve efficient absorption of electromagnetic waves. The simple preparation of CNCS materials was achieved through the etching of the ZIF-67 template by nickel nitrate and the subsequent hydrothermal vulcanization process. Its unique prismatic dodecahedron hollow structure promotes multiple scattering of electromagnetic waves. The attachment of the magnetic NiCo2S4 particles on the surface of the carbon template further promotes the interface polarization and dipole polarization, which is equivalent to the formation of a resistance-rich microcircuit and enhances the effect of the conductance loss on electromagnetic waves. At 2–18 GHz, the CNCS-2 with 30% paraffin addition achieves an effective bandwidth of 5.54 GHz at a matching thickness of 1.7 mm, and has a maximum reflection loss of −36.44 dB at 1.5 mm. By adjusting the thickness of the material matching layer (1–3 mm), an effective bandwidth of up to 13.48 GHz can be achieved, perfectly covering the X-band and Ku-band. Based on the simple preparation process of the material, the special hollow structure and the multiple loss mechanisms for electromagnetic waves, we believe that CNCS can become a strong competitor for high-efficiency broadband absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2021
·Vol. 5
·期 1
·469-480
·
IF 5.693
Hu Peitao,Dong Shun,Yuan Fang,Li Xiutao,Hong Changqing
Due to the unique advantages including low density, good chemical stability, and superior dielectric property, carbon-based materials have been exploited as potential microwave absorbers and have become a research hotspot. Herein, a superior microwave absorbent consisting of NiCo 2 S 4 nanosheets anchored on hollow carbon spheres is successfully designed and fabricated by a low-cost and facile strategy for the first time. The obtained C/NiCo 2 S 4 composite shows a minimum reflection loss (RL min ) of −65.10 dB with a matching thickness of only 1.56 mm, and the effective absorption bandwidth (EAB) could reach up to 6.60 GHz at a thin thickness of 1.75 mm, which is a highly competitive carbon-based absorber. The existence of NiCo 2 S 4 nanosheets balances the impedance matching property and enhances the dielectric loss effectively, and the cavity structure promotes the multiple reflections of the electromagnetic wave (EMW), which increases the energy loss capacity of the material. This study provides new insight into design and modification of hollow carbon spheres and broadens their application in the field of efficient microwave absorbers. Graphical abstract
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Shemsu Ligani Fereja,Ping Li,Ziwei Zhang,Jinhan Guo,Zhongying Fang,Zongjun Li,Wei Chen
Electrocatalytic water splitting is a promising process as it can effectively convert renewable electricity to chemical energy such as hydrogen gas. However, the energy conversion efficiency of water splitting process is fundamentally dependent on the catalytic activity of selected electrocatalyst . In particular, one of the main reasons that hinder the practical application of water splitting system is the sluggish kinetics of oxygen evolution reaction (OER). Hence, earth-abundant elements-based catalysts with excellent OER catalytic performance is significantly important. Herein, MOF-derived NiCo 2 S 4 /Fe 2 O 3 hybrid nanostructure grown on carbon cloth (NiCo 2 S 4 /Fe 2 O 3 @CC) was successfully fabricated as OER catalyst. Benefiting from the merits of unique architecture with hybrid heterostructure grown on carbon cloth, high porosity and abundant active sites , the designed NiCo 2 S 4 /Fe 2 O 3 @CC demonstrated superior electrocatalytic performance toward the OER. The fabricated NiCo 2 S 4 /Fe 2 O 3 @CC catalyst exhibited very low overpotential of 190 mV to achieve a current density of 10 mA cm −2 and a small Tafel slope of 45 mV dec −1 . Furthermore, the as-fabricated catalyst demostrated remarkable stability. The present work provides an effective method to fabricate novel metal sulfide and metal oxide hybrids for OER catalysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Biosensors-Basel
·
2022
·Vol. 12
·期 10
·823
·
IF 5.743
Xiaomin Lang,Dandan Chu,Yan Wang,Danhua Ge,Xiaojun Chen
Transition metal sulfides have been explored as electrode materials for non-enzymatic detection. In this work, we investigated the effects of phosphorus doping on the electrochemical performances of NiCo2S4electrodes (P-NiCo2S4) towards glucose oxidation. The fabricated non-enzymatic biosensor displayed better sensing performances than pristine NiCo2S4, with a good sensitivity of 250 µA mM−1cm−2, a low detection limit (LOD) of 0.46 µM (S/N = 3), a wide linear range of 0.001 to 5.2 mM, and high selectivity. Moreover, P-NiCo2S4demonstrated its feasibility for glucose determination for practical sample testing. This is due to the fact that the synergetic effects between Ni and Co species, and the partial substitution of S vacancies with P can help to increase electronic conductivity, enrich binary electroactive sites, and facilitate surface electroactivity. Thus, it is found that the incorporation of dopants into NiCo2S4is an effective strategy to improve the electrochemical activity of host materials.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2017
·
IF 3.012
Yongkun Liu,Guohua Jiang,Shiqing Sun,Bin Xu,Junyi Zhou,Yang Zhang,Juming Yao
In this work, the flexible electrospun carbon nanofiber substrates fixed with Ag nanoparticles and graphene oxide have been prepared by combination of electrospinning and carbonization treatments. And then growth of NiCo 2 S 4 nanotube on carbon nanofibers to form hybrid carbon nanofibers was prepared by a hydrothermal method . The composition and microstructures of resultant composites were characterized by field emission scanning electron microscopy (FE-SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffractometer (XRD). The obtained hybrid carbon nanofibers exhibited excellent property of suppleness. The electrochemical activity and stability of hybrid carbon nanofibers were investigated by electrochemical measurement and it exhibited an excellent specific capacity of 360 F·g − 1 at 0.3 A·g − 1 . Notably, the specific capacity of hybrid carbon nanofibers also exhibited a remarkable cycling stability (90.0% retention after 2000 cycles). The assembled symmetric hybrid carbon nanofibers-based supercapacitor also exhibited excellent flexible, include bendable, foldable and even twistable property.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 43
·15633-15639
·
IF 4.39
Mengqi Cui,Zining Wang,Hui Wang,Xuyun Wang,Jianwei Ren
In this work, the micro-controlling of the grain boundaries in NiCo2O4/NiCo2S4 nanowire arrays was achieved by exposing them to a sulfur containing atmosphere at 300 °C with different exposure times. The results showed that the capacitance of the optimal NiCo2S4 sample reached 400 μA h cm−2 at 30 mA cm−2 with a current retention rate of 58.6%. The assembled NiCo2O4/NiCo2S4//activate carbon electrode delivered a capacitance of 299.2 μA h cm−2 and 241.7 μA h cm−2 at a current density of 3 mA cm−2 and 30 mA cm−2, respectively. The cycling tests showed a good current retention rate of 88.1% after 8000 cycles. Besides, the NiCo2O4/NiCo2S4 composite exhibited a power density of 480.1 W kg−1 at an energy density of 47.87 W h kg−1, and 4773.66 W kg−1 at 38.67 W h kg−1, which indicated its potential for practical applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Xinmeng Zhang,Xin Wen,Jiahan Yang,Ji Li,Yuanting Wu
The Globe Thistles-Like (GTL) NiCo 2 S 4 nanostructures were supported on reduced graphene oxide modified filter paper (FP). The prepared GTL NiCo 2 S 4 /rGO/FP is investigated as a disposable and flexible electrode for the electrochemical detection of H 2 O 2 in alkaline media. Owing to the rich redox active sites, the synergistic effect between Co 3+ and Ni 2+ , and the rapid electron transportation of substituting sulfur (S) for oxygen (O) in NiCo 2 O 4 , the GTL NiCo 2 S 4 /rGO/FP exhibits considerable enzyme-free H 2 O 2 sensing performance with wide linear H 2 O 2 ranging from 38.8 to 37306.8 μM, high sensitivity of 2.4326 mA mM −1 cm −2 , and low detection limit of 0.08 μM. The GTL NiCo 2 S 4 /rGO/FP electrode has stable sensing performance and is highly selective toward analyte for physiological interfering species. The excellent electrochemical performance of GTL NiCo 2 S 4 /rGO/FP composite is attributed to the GTL structure of NiCo 2 S 4 . By studying the hydrothermal reaction time, electrochemical active surface area, and hydrophilic-hydrophobic surfaces of GTL NiCo 2 S 4 /rGO/FP composite, the relationship between the microstructure and sensing performance of the composite was elucidated. Surely this study opens up new possibilities for the application of low-cost, biodegradable flexible electrode materials in wearable sensors in the near future.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2019
·Vol. 48
·期 12
·8138-8148
·
IF 1.676
Lin Zihan,Min Zhiwen,Chen Wen,Min Feixia,Wu Huimin,Wang Shiquan,Feng Chuanqi,Zhang Yanqing
NiCo 2 S 4 and NiCo 2 S 4 /carbon nanotube (CNT) nanocomposites were synthesized via a one-step hydrothermal approach. As anode materials for lithium-ion batteries (LIBs), the NiCo 2 S 4 /CNT nanocomposite delivers significantly improved cycling stability and excellent rate performance, compared with the pure NiCo 2 S 4 . It retains a discharge capacity of 1405.7 mAh g −1 after 80 cycles at 200 mA g −1 with only 9.2% capacity degradation. Moreover, a discharge capacity of 711.6 mAh g −1 after 390 cycles can still be maintained even at a high current density of 1 A g −1 . The results demonstrate that the NiCo 2 S 4 /CNT nanocomposite holds great potential for applications in LIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）