A biomass-derived porous carbon-based nanocomposite for voltammetric determination of quercetin

Liu, Juan; Li, Xiaobao; Weng, Wenju; Xie, Hongmei; Luo, Guoan; Zhang, Shuyao; Li, Guangjiu; Sun, Wei

doi:10.1007/s00604-019-3953-0

Cited by 23 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, I D /I G ratio of the D and G bands increases to 0.91 after the azide functionalization [39] . GO‐N 3 reduces to RGO‐N 3 during the electrodeposition with cyclic voltammetry process and the intensity ratio of I D /I G bands increases to 1.03 after the reduction process due to the reduction of the average sp 2 C atoms in GO‐N 3 [40,41] …”

Section: Resultsmentioning

confidence: 99%

Metal Phthalocyanine Sensitized Photoelectrochemical Cell Assembling with Azide‐Functionalized Reduced Graphene and Quaternary Metal Chalcogenide Composites

Ezgi Varol,

Uğuz Neli,

Budak

et al. 2024

ChemElectroChem

View full text Add to dashboard Cite

Here, photoelectrodes of photoelectrochemical (PEC) cells consisting of azide functionalized reduced graphene oxide (GO‐N3) and quaternary metal chalcogenide (CdZnNiSSe) composites sensitized with metal phthalocyanines (MPc, M: Co, Zn, Ti) are developed and then tested in hydrogen evolution reaction (HER). CdZnNiSSe/RGO‐N3 composite is deposited on an indium tin oxide (ITO) electrode through a facile electrodeposition technique and ITO/CdZnNiSSe/RGO‐N3 photoelectrode is constructed. Then, MPcs bearing terminal alkyne groups are connected to RGO‐N3 via the copper(I)‐catalyzed azide‐alkyne cycloaddition (click chemistry) technique to produce ITO/CdZnNiSSe/RGO‐N3‐MPc structures. Decoration of ITO/CdZnNiSSe/RGO‐N3 with MPcs is proposed to improve the charge transfer capability of the photoelectrode due to wide light absorption of MPcs from UV toward the IR region of the light spectrum. PECHER responses indicate that among the photoanodes bearing ZnPc, CoPc, and TiOPc, ITO/CdZnNiSSe/RGO‐N3‐ZnPc electrode exhibits the highest PECHER performance owing to the suitability of band structure of ZnPc. Sensitizing ITO/CdZnNiSSe/RGO‐N3 with ZnPc increases the photocurrent density from 5.0 to 7.3 mA cm−2 at 0.8 V vs. RHE and the applied bias photon to current efficiency (ABPE) enhances from 3.18 % to 3.87 %. This study provides a new approach for increasing the performance of photoanodes via sensitization with MPcs in photoelectrochemical hydrogen evolution processes for future applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Metal Phthalocyanine Sensitized Photoelectrochemical Cell Assembling with Azide‐Functionalized Reduced Graphene and Quaternary Metal Chalcogenide Composites

Ezgi Varol,

Uğuz Neli,

Budak

et al. 2024

ChemElectroChem

View full text Add to dashboard Cite

show abstract

“…The porous structure of the carbon material not only enhances its adsorption capacity but also offers ample space for the adsorption of electrolytic ions. [38]. The CV curves of II-K-CSAC showed a slightly lower peak current response (I pa = 130.8 µA, I pc = −129.9 µA), which was strongly related to the preparation method of the activated carbon [39].…”

Section: Electrochemical Properties Analysismentioning

confidence: 88%

Effect of Preparation Process on the Physicochemical Properties of Activated Carbon Prepared from Corn Stalks

Xu,

Chang,

et al. 2024

Agriculture

View full text Add to dashboard Cite

The preparation of activated carbon (AC) from agricultural and forestry wastes is one of the effective methods for resource utilization. In this study, AC was prepared from corn stalk (CS) by pyrolysis, one-step activation, and two-step activation to determine the optimum preparation method. Based on this, a single-factor design was used to investigate the influence of activating agents (KOH, NaOH, KOH/NaOH), activation temperatures (600, 700, 800 °C), and activation times (60, 90, 120 min) on the physicochemical properties of AC. The physicochemical properties of AC were characterized by Thermal gravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), and Cyclic voltammetry (CV). The results showed that the AC obtained by the one-step activation method (KOH, 800 °C, 120 min) exhibited a rich pore structure and excellent electrochemical properties (Ipa = 159.8 μA, Ipc = −169.5 μA). However, for the two-step activation method, the AC exhibited a poor pore structure and electrochemical properties (Ipa = 130.8 μA, Ipc = −129.9 μA). In addition, one-step activation provides high-quality AC in a shorter activation time than two-step activation.

show abstract

“…The flavonol quercetin was determined in Ginkgo tablets using a sensor consisting of a Pt-Au-BPC nanocomposite, which showed an LOD of 50 nM in the linear ranges from 0.15 to 6.0 µM and from 10 to 25 µM [171]. Quercetin determination in different pharmaceutical samples was also conducted at a sensor based on magnetic rGO (MrGO), Fe 3 O 4 and Ag NPs integrated into a MIP-modified SPE [169], with an LOD of 13 nM and a linear response range from 20 nM to 250 µM.…”

Section: Flavonoids Determination In Nutraceuticalsmentioning

confidence: 99%

Electrochemistry of Flavonoids: A Comprehensive Review

Chiorcea-Paquim

2023

IJMS

View full text Add to dashboard Cite

Flavonoids represent a large group of aromatic amino acids that are extensively disseminated in plants. More than six thousand different flavonoids have been isolated and identified. They are important components of the human diet, presenting a broad spectrum of health benefits, including antibacterial, antiviral, antimicrobial, antineoplastic, anti-mutagenic, anti-inflammatory, anti-allergic, immunomodulatory, vasodilatory and cardioprotective properties. They are now considered indispensable compounds in the healthcare, food, pharmaceutical, cosmetic and biotechnology industries. All flavonoids are electroactive, and a relationship between their electron-transfer properties and radical-scavenging activity has been highlighted. This review seeks to provide a comprehensive overview concerning the electron-transfer reactions in flavonoids, from the point of view of their in-vitro antioxidant mode of action. Flavonoid redox behavior is related to the oxidation of the phenolic hydroxy groups present in their structures. The fundamental principles concerning the redox behavior of flavonoids will be described, and the phenol moiety oxidation pathways and the effect of substituents and experimental conditions on flavonoid electrochemical behavior will be discussed. The final sections will focus on the electroanalysis of flavonoids in natural products and their identification in highly complex matrixes, such as fruits, vegetables, beverages, food supplements, pharmaceutical compounds and human body fluids, relevant for food quality control, nutrition, and healthcare research.

show abstract

A biomass-derived porous carbon-based nanocomposite for voltammetric determination of quercetin

Cited by 23 publications

References 39 publications

Metal Phthalocyanine Sensitized Photoelectrochemical Cell Assembling with Azide‐Functionalized Reduced Graphene and Quaternary Metal Chalcogenide Composites

Metal Phthalocyanine Sensitized Photoelectrochemical Cell Assembling with Azide‐Functionalized Reduced Graphene and Quaternary Metal Chalcogenide Composites

Effect of Preparation Process on the Physicochemical Properties of Activated Carbon Prepared from Corn Stalks

Electrochemistry of Flavonoids: A Comprehensive Review

Contact Info

Product

Resources

About