MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qing Huang,Chen-dong Ling,Wen-feng Zhuge,Wei Huang,Feng-ping Liu,Cui-zhong Zhang,Jin-yun Peng,Fu-xing Huang
An efficient electrochemical sensor for rutin determination based on CeO 2 /NiCo 2 S 4 acanthosphere-like microspheres and multi-walled carbon nanotubes (MWCNTs) modified electrode was proposed. In this work, we design an acanthosphere-like CeO 2 /NiCo 2 S 4 heterojunction by an “in situ growth” method of hydrothermal process. Then MWCNTs were introduced into heterostructured microspheres to form composites of CeO 2 /NiCo 2 S 4 /MWCNTs. The morphology and elemental properties of the electrochemical materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The redox mechanism of rutin on the working electrode surface and the electrochemical properties were investigated by cyclic voltammetry (CV), chrono coulometry (CC) and electrochemical impedance spectroscopy (EIS). The results show that the CeO 2 /NiCo 2 S 4 /MWCNTs modified glassy carbon electrode exhibited excellent electric conductivity and electrocatalytic activity toward rutin, and increased effective working area. Under the optimized condition, the fabricated sensor expressed a good linear response for rutin analysis ranging from 0.5 to 65.4 μM with a low detectable limit of 4.37 × 10 -2 μM (S/N = 3). The electrochemical sensor shows good reproducibility and reliable stability, high sensitivity and selectivity, and has been successfully applied for rutin determination in orange juice and human urine samples.
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Pengju Su,Qingze Jiao,Hansheng Li,Yongjian Li,Xiufeng Liu,Qin Wu,Daxin Shi,Yun Zhao,Tong Wang,Wei Wang
Composite materials made of bimetallic sulfide quantum dots and carbon nanotubes are promising electrocatalysts due to the large specific surface area and synergistic effect between sulfides and carbon components. In this work, NiCo2S4 quantum dot-modified nitrogen-doped carbon nanotubes (NiCo2S4 QD@NCNTs) are prepared by a two-step solvothermal method, followed by calcination. The dye-sensitized solar cells containing NiCo2S4 QD@NCNTs as a counter electrode (CE) achieve a photoelectric conversion efficiency of 7.65%, which is superior to that of Pt (7.39%), and exhibit good electrochemical stability in iodine-based electrolytes. The notable performance is attributed to the synergistic effect between NiCo2S4 QD and NCNTs. Hence, polypyrrole-derived NCNTs with high electrical conductivity and many uniformly dispersed N-doped species on the surface tightly anchor NiCo2S4 QD through metal–nitrogen bonds (metal–N–C bonds). As a result, the transfer of electrons from the skeleton to the active site is promoted, the agglomeration of NiCo2S4 QD is hampered, and more active sites are available.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 12
·1-12
·
IF 5.3
Wang Yisi,Zhang Junying,Lv Xinxin,Ding Ya,Wang Yaolong,Liu Yuanhua,Wu Chunyong,Yang Gongjun
A highly sensitive and selective label-free impedimetric immunosensor based on AuNPs@pDA@NiCo 2 S 4 @MoS 2 nanocomposite modified on the surface of a screen-printed electrode (SPE) was designed for the detection of interleukin-6 (IL-6). The distribution of NiCo 2 S 4 nanoparticles on MoS 2 nanosheets was able to prevent them from agglomerating. The polydopamine (pDA) layer was coated on the surface of NiCo 2 S 4 @MoS 2 nanosheets by self-polymerization, which improved the stability and biocompatibility of the nanomaterial. The excellent reduction ability of pDA promoted the synthesis of gold nanoparticles (AuNPs), which increased the amount of antibody adsorption and the conductivity of the material. Finally, the antibody (Ab) of IL-6 was immobilized on the surface of AuNPs@pDA@NiCo 2 S 4 @MoS 2 nanocomposite. Electrochemical impedance spectroscopy (EIS) was used to detect the change of impedance before and after the immune response between Ab and IL-6 antigen (IL-6). Under the optimal experimental conditions, the relative change in impedance and the logarithmic concentration of IL-6 showed a good linear relationship in the range 1.00 to 1.00 × 10 6 pg/mL, with a low detection limit of 0.97 pg/mL. In addition, the proposed immunosensor performed with good reproducibility, stability, and specificity. It was successfully applied to the determination of IL-6 in patient’s serum samples of head and neck carcinoma with recoveries of 98.40% to 106.5%. To sum up, the proposed label-free impedimetric immunosensor was successfully constructed for IL-6 detection in real samples. Graphical abstract
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xiaobo Yang,Shuang Liang,Guanzhihui Wang,Bao Zhou,Zhuoqi Duan,Zaixin Xie,Yongmao Hu
Developing oxygen evolution reaction (OER) electrocatalysts with high efficiency, low cost and good stability for water splitting is significant to relieve the energy crisis and environmental pollution. Herein, NiCo alloy (NC) nanoparticles (NPs) embedded N-doped carbon fibers (NCF) were prepared by electrospinning and carbonization. The surfaces of the NC@NCF were anchored with nanocrystalline NiCo 2 S 4 (NCS) in a following solvothermal process to form NCS-NC@NCF composite. Synergistic effect of the alloy (NC) and the semiconductor (NCS) was successfully stimulated, i.e., rapid charge separation and transfer was achieved during the OER process. In addition, the carbon fibers substrate is beneficial for good dispersion of the NC and NCS NPs as well as the conductivity improvement of the as-prepared NCS-NC@NCF catalyst. The prepared NCS-NC@NCF catalyst electrode owns good OER performances of a low overpotential of 291 mV, 342 mV and 376 mV to respectively deliver current densities of 10 mA cm −2 , 50 mA cm −2 and 100 mA cm −2 , which are respectively 19 mV, 82 mV and 116 mV lower than those of the RuO 2 electrode (310 mV, 424 mV and 492 mV), indicating the great potential of the catalyst in water splitting. Moreover, good durability of current density retention of 90.7 % is observed after 60 h of continuous OER polarization for the catalyst. Additionally, a two-electrode system composed of commercial Pt/C and the NCS-NC@NCF electrodes only needs a driven voltage of 1.51 V to afford 10 mA cm −2 for water splitting, which is superior to that (1.69 V) of the Pt/C||RuO 2 system.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hong Jia,Mengyang Wang,Mengyao Feng,Guangzhi Li,Longhua Li,Yu Liu
Constructing heterostructures with nanotube arrays not only provides rich ion electron pathways to promote rapid Faraday reactions, but also enhances interfacial electron transfer, supplying larger capacitance and rapid energy storage. Herein, NiCo-layered double hydroxide (LDH)/NiCo 2 S 4 nanotube arrays decorated with black phosphorus quantum dots (BPQD) is prepared through solvothermal method and electrostatic adsorption. In the unique structure, tubular structure of NiCo-LDH/NiCo 2 S 4 /BPQD nanoarrays on carbon cloth can expose sufficient redox reaction active sites and multiple ion diffusion channels to promote rapid faradic reactions. Density functional theory (DFT) theoretical calculations further confirm the enhancement of conductivity and OH – adsorption in ternary composite materials. The as-obtained NiCo-LDH/NiCo 2 S 4 /BPQD achieves an ultra-high capacitance of 2938.2F g −1 at 1.0 A g −1 . Finally, an asymmetric supercapacitor consists of activated carbon and NiCo-LDH/NiCo 2 S 4 /BPQD exhibits a satisfactory energy density of 133.7 Wh kg −1 at 800 W kg −1 . In addition, after 10,000 repetitions of charging/discharging, the capacitance still remains 76.5 %. Above results suggest that NiCo-LDH/NiCo 2 S 4 /BPQD electrode may facilitate the further development of hierarchical array structure electrodes in the energy storage field.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Yanlei He,Ning Li,Weikang Li,Xianxi Zhang,Xiao Zhang,Zhenxue Liu,Qingyun Liu
5,10,15,20-tetrakis (4-carboxylphenyl) porphyrin functionalized NiCo 2 S 4 yolk-shell nanospheres (Por-NiCo 2 S 4 ) were fabricated by a facile and efficient solvothermal strategy and demonstrated to possess excellent peroxidase-like activity. Compared with pure NiCo 2 S 4 nanospheres, Por-NiCo 2 S 4 exhibits the superior peroxidase activity, which was evaluated by the fast oxidation of 3,3′,5,5′-tetramethylbenzidine (a chromogenic substrate, TMB) by H 2 O 2 to form the blue product (oxTMB) only in 10 s. The systematic studies including radical scavenger, fluorescence probe, and electrochemical experiments confirm that superoxide free radicals ( O 2 − ) play a key role in catalytic reactions, in addition to the synergistic effect of holes (h + ). Based on the developed peroxidase activity of Por-NiCo 2 S 4 , and combined with cholesterol oxidase (Chox), a fast cascade reaction sensing platform has been constructed to quantitatively determination cholesterol in a wide linear range of 0.1−9.0 mM with the detection limit of 19.36 μM. The Por-NiCo 2 S 4 based colorimetric biosensing platform has been used for determining the levels of total cholesterol in serum samples, indicating Por-NiCo 2 S 4 is expected to be used as the promising materials for fast visual colorimetry in clinical medical detection.
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高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Guoqing Sheng,Jiahui Chen,Yunming Li,Huangqing Ye,Zhixiong Hu,Xian-Zhu Fu,Rong Sun,Weixin Huang,Ching-Ping Wong
Flowerlike NiCo2S4 hollow sub-microspheres are synthesized through Cu2O templates to support Pd nanoparticles as high-efficiency catalysts for the hydrogen evolution reaction (HER). The diameter and shell size of NiCo2S4 hollow sub-microspheres are about 400 and 16 nm, respectively. In addition, the surface of the shells is constructed by petallike nanosheets. About 3 nm Pd particles uniformly incorporate with the flowerlike NiCo2S4 hollow sub-microsphere to form the NiCo2S4/Pd heterostructure. The NiCo2S4/Pd catalysts exhibit significantly lower overpotential of only 87 and 83 mV at 10 mA/cm2 for the HER in both acidic and alkaline conditions, respectively, relative to NiCo2S4 (247, 226 mV) and Pd (175, 385 mV) catalysts. Besides, the NiCo2S4/Pd catalysts also exhibit excellent stability of HER in these two conditions. The superior HER performance of NiCo2S4/Pd might be resulted from the unique architecture of metal nanoparticles anchored on the bimetallic sulfide flowerlike hollow sub-microspheres, which could provide high surface area, lots of active sites, strong synergetic effect, and stable structure.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Xiaojian Li,Yaoguang Wang,Li Shi,Hongmin Ma,Yong Zhang,Bin Du,Dan Wu,Qin Wei
An electrochemiluminescence (ECL) biosensor was developed for detection of Concanavalin A (Con A). Chitosan/Ru(bpy) 3 2+ /silica/Fe 3 O 4 nanomaterials (CRuSi-Fe 3 O 4 ) were synthesized through W/O microemulsion route. The added Fe 3 O 4 nanoparticles can simplify the prepared process and enhance the conductivity of nanomaterials which can increase the ECL intensity of luminophor CRuSi-Fe 3 O 4 . In addition, the layered structure of CRuSi-Fe 3 O 4 can immobilize lots of Con A using glutaraldehyde as the coupling agent which can improve the sensitivity of the biosensor. Then the quenching probe glucose functionalized NiCo 2 S 4 nanoparticles-grown on carboxylic graphene (NiCo 2 S 4 -COOH-rGO@Glu) was anchored on the modified-electrode via the specific carbohydrate-Con A interaction. Here, NiCo 2 S 4 was used to quench the ECL of CRuSi-Fe 3 O 4 , graphene was used to grow NiCo 2 S 4 nanoparticles as carrier materials and glucose was served as the recognition element for bounding Con A. Therefore, a desirable quenching ECL signal was measured with S 2 O 8 2- as the coreactant of CRuSi-Fe 3 O 4 . Under the optimization of determination conditions, a linear response range for Con A from 0.5 pg mL −1 to 100 ng mL −1 was obtained, and the detection limit was calculated to be 0.18 pg mL −1 (S/N=3).
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高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 25
·13308-13316
·
IF 7.443
Bin Yang,Lei Yu,Huijun Yan,Yanbo Sun,Qi Liu,Jingyuan Liu,Dalei Song,Songxia Hu,Yi Yuan,Lianhe Liu,Jun Wang
Pseudocapacitor electrode materials, such as transition metal oxides/sulfides, have been extensively investigated and shown to have fast energy storage properties, but their low rate performance and poor cycle stability are serious problems in practical applications. We present here a design for the architecture of these electrode materials with the aim of improving the rate performance and cycle stability of pseudocapacitors by using an interface ion-exchange method. Precursor materials obtained by a hydrothermal reaction were soaked in aqueous NaHS solution to synthesize the urchin-like core–shell structure of NiCo2(CO3)1.5(OH)3@NiCo2S4. Such core–shell nanostructure electrode materials can make full use of both components with synergistic effects. Excellent results were obtained with a capacitance of 956.4 F g−1 at a current density of 4 A g−1 in the three-electrode system and an actual energy density of 32.3 W h kg−1 and power density of 1835 W kg−1 in the asymmetrical supercapacitor.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yuanzhe Fu,Xin Wang,Wei Feng,Zewen Ding,Xiang Feng,Xiaozhong Wu,Pengfei Zhou,Fangyong Yu,Jin Zhou,Shuping Zhuo
In this work, the structure and morphology of NiCo 2 S 4 (NCS) were modulated by varying the anion types (Cl − , CH 3 COO − , and NO 3 − ) of nickel and cobalt salts. Extensive material characterization and analyses revealed that the grain size of the obtained NCSs was determined by different solvation free energies, capping effects, and steric hindrance during the crystal growth process. Among these three anions, Cl − , with the smallest ionic size, exhibited the lowest capping effect, steric hindrance, and solvation free energy, leading to the largest average grain size of 15.34 nm for Cl − -based NiCo 2 S 4 (NCS-C). Moreover, the sea urchin-like morphology of NCS-C provided a high reaction interface for electrochemical energy storage. As a result, the specific capacitance of NCS-C could reach 1112.4 F/g at a current density of 6 A/g, retaining 692 F/g even at a high current density of 16 A/g. The assembled asymmetric supercapacitor could also deliver a high energy density of 23.4 Wh kg −1 . This work highlights the significant influence of anion type on the structural and morphological evolution of NCS materials, providing new insights for the development of high-rate NCS-based electrode materials.
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高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xiaoyu Zhang,Yongguang Yang,Qian Zhang,Ruijie Bai,Lidong Li,Xinzhan Wang,Ling Li
Design inexpensive and stable counter electrodes materials is great essential for accelerating the industrial application of dye-sensitized solar cells. Herein, transition metal sulfides FeCo 2 S 4 and NiCo 2 S 4 were in-situ synthesized into composite with core–shell structure on surface of carbon paper by hydrothermal method, and is used as CEs material of DSSCs. Besides, titanium mesh with lower resistivity is also used as a conductive base to prepare the CEs and reduce the series resistance of DSSCs. Therefore, after electrochemical analysis and photoelectric performance test, it is found that the photoelectric conversion efficiency of the DSSCs assembled with composite material CEs can be as high as 10.08 % (with the J sc is 19.59 mA·cm −2 , V oc is 0.796 V, FF is 0.65), which much higher than traditional Pt CEs (7.99 %) and other corresponding counterparts, indicating that the core–shell structure is more conducive to improving the catalytic activity of the material.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Wenming Zhang,Jintao Chen,Yiqun Liu,Siming Liu,Xiaoting Li,Kun Yang,Ling Li
Although potassium ion batteries (KIBs) have been invested in development as an emerging low-cost, high-content energy storage system at present. However, the large ionic radius of K + -ion lead to poor rate performance and low cycle life. Therefore, it is extremely necessary to develop a new type of potassium storage material. Here, we report a novel three-dimensional (3D) structural self-supported anode composite material for KIBs, which consists of tapered rod-shaped nanomaterial NiCo 2 S 4 and nitrogen-doped hollow carbon nanofibers (NiCo 2 S 4 @N-HCNFs). Then, the composite material was obtained by high temperature carbonization and hydrothermal reaction process. The prepared electrode materials were used to assemble K half-cells for electrochemical performance measurement, achieved the capacity of 263.7 mAh g −1 after 200 cycles at a current density of 100 mA g −1 and an outstanding stability of retaining 134.3 mAh g −1 at 3200 mA g −1 after 600 cycles. It has superior performance and convenient synthesis process over other reported metal sulfides self-supported anode materials for KIBs so far. The novel structure not only shorten the ion transmission distance, but also increase the contact area with the electrolyte. It can improve electrochemical performance effectively.
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