NiO@Ni-MOF nanoarrays modified Ti mesh as ultrasensitive electrochemical sensing platform for luteolin detection

Yan

et al. 2021

ACS Appl. Nano Mater.

An electrode material with high performance as a key part is highly desirable for supercapacitors. Herein, NiO/Ni metal−organic framework (Ni-MOF) composites were successfully synthesized via the first preparation of NiO nanoflakes and then in situ formation of Ni-MOF over NiO. Particularly, the conversion degree of Ni-MOF from NiO was conveniently tuned by altering the amount of terephthalic acid added in the hydrothermal process. NiO/Ni-MOF-25 with 25% of the conversion ratio of NiO to Ni-MOF possessed superior electrochemical performance with a specific capacity of 163.4 mA h g −1 (1176.6 F g −1 ) at a current density of 1 A g −1 , higher than Ni-MOF (79.3 mA h g −1 ) and NiO (79.8 mA h g −1 ). The boosted electrochemical performance of NiO/Ni-MOF-25 was attributed to its core-shell configuration, relatively high specific surface area, and enhanced electrical conductivity. The assembled NiO/Ni-MOF-25//activated carbon asymmetrical supercapacitor achieved a maximum energy density of 31.3 W h kg −1 at a power density of 374.2 W kg −1 and decent cyclic durability with 88.7% of incipient capacitance after 2000 cycles. Moreover, two asymmetric devices in series constructed 3 months ago could efficiently illuminate a green light-emitting diode (LED) lamp. This work offers a facile way to rationally design and synthesize composite electrode materials for powerful supercapacitors.

Section: Resultsmentioning

confidence: 97%

NiO/Ni Metal–Organic Framework Nanostructures for Asymmetric Supercapacitors

Yan

et al. 2021

ACS Appl. Nano Mater.

“…Regarding to the LOD, the work reported by Fu and Liu et al reaching 1.7 pM, 87 together with the articles published by Dong and Guo et al, what reaches concentration of 3.3 pM, 88 and the work of Qu and Lu et al obtaining a LOD value of 3 pM, 89 are the most promising in the field. It is noteworthy, in the case of these last two studies, in addition to extremely low detection limits, they achieve the measurement in a very short time, 60 s and 30 s, respectively.…”

Section: Electrochemical Determinationsmentioning

confidence: 94%

“…Regarding to the LOD, the work reported by Fu and Liu et al reaching 1.7 pM, 87 89 are the most promising in the field. It is noteworthy, in the case of these last two studies, in addition to extremely low detection limits, they achieve the measurement in a very short time, 60 s and 30 s, respectively.…”

Section: Electrochemical Determinationsmentioning

confidence: 99%

Analytical determinations of luteolin

Tesio¹,

Robledo

2021

BioFactors

Plants, through the photosynthesis process, produce the substances necessary for all the life cycles of nature, which are called "primary metabolites." Moreover, there are some plants that synthesize, in addition to these, other substances with more specific functions, which are known as "secondary metabolites." It is inside this group that flavonoids are located, whose main function is to protect organisms from damage caused by different oxidizing agents. Luteolin (3,4,5,7-tetrahydroxy-flavone) belongs to the sub-class of flavonoids known as flavones and is one of 10,000 flavonoids currently known,

“…Different combinations of transmittance and conductivity can be customized by adjusting line widths and spacing. The current preparation processes mainly include the heat treatment method [62], template method [63], lithography [64], imprinting [65], and laser pulse etching [66]. In order for them to be commercially available, it is necessary to find a high-throughput and low-cost preparation process.…”

Section: Metal Meshmentioning

confidence: 99%

Recent Developments in Flexible Transparent Electrode

et al. 2021

Crystals

With the rapid development of flexible electronic devices (especially flexible LCD/OLED), flexible transparent electrodes (FTEs) with high light transmittance, high electrical conductivity, and excellent stretchability have attracted extensive attention from researchers and businesses. FTEs serve as an important part of display devices (touch screen and display), energy storage devices (solar cells and super capacitors), and wearable medical devices (electronic skin). In this paper, we review the recent progress in the field of FTEs, with special emphasis on metal materials, carbon-based materials, conductive polymers (CPs), and composite materials, which are good alternatives to the traditional commercial transparent electrode (i.e., indium tin oxide, ITO). With respect to production methods, this article provides a detailed discussion on the performance differences and practical applications of different materials. Furthermore, major challenges and future developments of FTEs are also discussed.