NiO@ graphite carbon nanocomposites derived from Ni-MOFs as supercapacitor electrodes

Wu, Shao-Rui; Liu, Jingbing; Wang, Hao; Yan, Hui

doi:10.1007/s11581-018-2812-z

Cited by 25 publications

(4 citation statements)

References 51 publications

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“…Metal-organic frameworks (MOFs), constructed by the assembly of metal units with appropriate organic linking groups, have gained growing attention in the recent years [1][2][3][4]. The fascinating MOFs show important applications in many fields, such as nano-catalysis [5], adsorption materials [6], conductive materials [7], catalysis materials [8,9] and fluorescent sensor [10,11]. Particularly, lanthanide-based luminescent MOFs (Ln-MOFs) can act as a type of effective fluorescent sensors due to their intrinsic luminescence features and inherent porosity of structure [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Controllable synthesis of Tb-based metal–organic frameworks as an efficient fluorescent sensor for Cu2+ detection

Dong

Yang

et al. 2020

Rare Met.

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A series of Tb-based metal-organic frameworks (Tb-MOFs) were successfully synthesized by a solvothermal method. The size and morphology of the as-obtained Tb-MOFs can be effectively controlled via regulating the experimental conditions such as the volume fraction of DMF and the molar ratio of Tb 3? to NaOH. It is found that all the samples exhibit strong green emissions under ultraviolet excitation, corresponding to 5 D 4 ? 7 F J transitions of Tb 3? . Interestingly, Tb-MOFs displayed an efficient and distinct luminescence quenching by Cu 2? in aqueous solutions. The competitive fluorescence detection experiments indicate that these Tb-MOFs sensors can be used as a high selective and sensitive sensor of Cu 2? detection with the detection limit of 10 lmolÁL -1 , which can be used as a promising fluorescence sensor for Cu 2? detection in daily life.

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Section: Introductionmentioning

confidence: 99%

Controllable synthesis of Tb-based metal–organic frameworks as an efficient fluorescent sensor for Cu2+ detection

Dong

Yang

et al. 2020

Rare Met.

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“…Moreover, the smaller NiO crystal size in ACNS1 could be beneficial since it can provide higher specific surface area for charge storage. It should also be noted that most of the literature reported also apply 5–10% conductive carbon black to improve the conductivity of the electrodes 23 , 41 . In this work, we prepared electrodes without adding carbon black.…”

Section: Resultsmentioning

confidence: 99%

Bitumen and asphaltene derived nanoporous carbon and nickel oxide/carbon composites for supercapacitor electrodes

Mishra

Zhou

Hassan

et al. 2022

Sci Rep

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Asphaltenes from bitumen are abundant resource to be transformed into carbon as promising supercapacitor electrodes, while there is a lack of understanding the impact from different fractions of bitumen and asphaltenes, as well as the presence of transition metals. Here, nanoporous carbon was synthesized from bitumen, hexane-insoluble asphaltenes and N,N-dimethylformamide (DMF)-fractionated asphaltenes by using Mg(OH)2 nanoplates as the template with in-situ KOH activation, and used as an supercapacitor electrode material. All of the carbon exhibited large surface area (1500–2200 m2 g−1) with a distribution of micro and mesopores except for that derived from the DMF-soluble asphaltenes. The pyrolysis of asphaltenes resulted in the formation of nickel oxide/carbon composite (NiO/C), which demonstrated high capacitance of 380 F g−1 at 1 A g−1 discharge current resulting from the pseudocapacitance of NiO and the electrochemical double layer capacitance of the carbon. The NiO/C composite obtained from the DMF-insoluble portion had low NiO content which led to lower capacitance. Meanwhile, the specific capacitance of NiO/C composite from the DMF-soluble part was lower than the unfractionated asphaltene due to the higher NiO content resulting in lower conductivity. Therefore asphaltenes derived from nickel-rich crude bitumen is suitable for the synthesis of nanoporous NiO/C composite material with high capacitance.

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“…In the Table S1 demonstrated a comparation of the electrochemical performance of the obtained NiO/C (60 wt% NiO) and other NiO/C composites with different carbon supports (composite microspheres [ 30 ], hollow microspheres [ 31 ], CNTs [ 32 ], carbon coating on the NiO [ 33 ], graphite [ 34 ], sulfonated graphene [ 35 ], carbon nanospheres [ 36 ]), prepared by various methods [ 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. One can see that the C s of the NiO/C (60 wt% NiO) at the current density of 1 A g −1 is 405 Fg −1 ( Figure 6 c, Table S1 ) which is nearly the same [ 35 , 36 ] or much higher than C s [ 30 , 31 , 32 , 33 , 34 ] of other materials.…”

Section: Resultsmentioning

confidence: 99%

Non-Isothermal Decomposition as Efficient and Simple Synthesis Method of NiO/C Nanoparticles for Asymmetric Supercapacitors

et al. 2021

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A series of NiO/C nanocomposites with NiO concentrations ranging from 10 to 90 wt% was synthesized using a simple and efficient two-step method based on non-isothermal decomposition of Nickel(II) bis(acetylacetonate). X-ray diffraction (XRD) measurements of these NiO/C nanocomposites demonstrate the presence of β-NiO. NiO/C nanocomposites are composed of spherical particles distributed over the carbon support surface. The average diameter of nickel oxide spheres increases with the NiO content and are estimated as 36, 50 and 205 nm for nanocomposites with 10, 50 and 80 wt% NiO concentrations, respectively. In turn, each NiO sphere contains several nickel oxide nanoparticles, whose average sizes are 7–8 nm. According to the tests performed using a three-electrode cell, specific capacitance (SC) of NiO/C nanocomposites increases from 200 to 400 F/g as the NiO content achieves a maximum of 60 wt% concentration, after which the SC decreases. The study of the NiO/C composite showing the highest SC in three- and two-electrode cells reveals that its SC remains almost unchanged while increasing the current density, and the sample demonstrates excellent cycling stability properties. Finally, NiO/C (60% NiO) composites are shown to be promising materials for charging quartz clocks with a power rating of 1.5 V (30 min).

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NiO@ graphite carbon nanocomposites derived from Ni-MOFs as supercapacitor electrodes

Cited by 25 publications

References 51 publications

Controllable synthesis of Tb-based metal–organic frameworks as an efficient fluorescent sensor for Cu2+ detection

Controllable synthesis of Tb-based metal–organic frameworks as an efficient fluorescent sensor for Cu2+ detection

Bitumen and asphaltene derived nanoporous carbon and nickel oxide/carbon composites for supercapacitor electrodes

Non-Isothermal Decomposition as Efficient and Simple Synthesis Method of NiO/C Nanoparticles for Asymmetric Supercapacitors

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