Synergistic effect of adsorption coupled with catalysis based on graphene-supported MOF hybrid aerogel for promoted removal of dyes

Wan, Yinjia; Wang, Jian‐Zhi; Huang, Fei; Xue, Yanan; Cai, Ning; Liu, Jie; Chen, Weimin; Yu, Faquan

doi:10.1039/c8ra05873c

Cited by 44 publications

(11 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Raman spectrum of MOG powder (Figure S3, bottom) has the typical characteristic signals of MIL-100 (Fe), as reported in the literature (Lohe et al, 2009;Wan et al, 2018;Gong et al, 2019). These findings along with FTIR data support MIL-100 (Fe)-like features in the MOG material.…”

Section: Resultssupporting

confidence: 83%

Hierarchical Porous Graphene–Iron Carbide Hybrid Derived From Functionalized Graphene-Based Metal–Organic Gel as Efficient Electrochemical Dopamine Sensor

et al. 2020

View full text Add to dashboard Cite

A metal-organic gel (MOG) similar in constitution to MIL-100 (Fe) but containing a lower connectivity ligand (5-aminoisophthalate) was integrated with an isophthalate functionalized graphene (IG). The IG acted as a structure-directing templating agent, which also induced conductivity of the material. The MOG@IG was pyrolyzed at 600 • C to obtain MGH-600, a hybrid of Fe/Fe 3 C/FeO x enveloped by graphene. MGH-600 shows a hierarchical pore structure, with micropores of 1.1 nm and a mesopore distribution between 2 and 6 nm, and Brunauer-Emmett-Teller surface area amounts to 216 m 2 /g. Furthermore, the MGH-600 composite displays magnetic properties, with bulk saturation magnetization value of 130 emu/g at room temperature. The material coated on glassy carbon electrode can distinguish between molecules with the same oxidation potential, such as dopamine in presence of ascorbic acid and revealed a satisfactory limit of detection and limit of quantification (4.39 × 10 −7 and 1.33 × 10 −6 M, respectively) for the neurotransmitter dopamine.

show abstract

Section: Resultssupporting

confidence: 83%

Hierarchical Porous Graphene–Iron Carbide Hybrid Derived From Functionalized Graphene-Based Metal–Organic Gel as Efficient Electrochemical Dopamine Sensor

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Up to now, a series of non‐noble electrocatalysts, like earth‐abundantly transition metal chalcogenides, oxides, carbide, nitrides,, borides and phosphides as well as their hybrids, have attracted more attention because of their low price and excellent performance. Among them, transition metal oxides (TMOs, such as CoOx, NiOx, FeOx) have sparked considerable attention owing to their rich redox chemistry and simple preparation methods .…”

Section: Introductionmentioning

confidence: 99%

Mo‐Doped Cu/Co Hybrid Oxide Nanoarrays: An Enhanced Electrocatalytic Performance for the Hydrogen Evolution Reaction

et al. 2019

Self Cite

View full text Add to dashboard Cite

To achieve a cost‐effective and performance‐enhanced electrocatalyst for the hydrogen evolution reaction (HER), Mo‐doped Cu/Co hybrid oxides were prepared through the processes of hydrothermal chemistry and dehydration/reduction. Hybrid structures consisting of a polycrystalline hybrid crystal structure and an amorphous structure, and hybrid constituents including at least Cu, Cu2O, CuO, CoO, CuCoO2, and Cu2CoO3 were identified and characterized by using SEM, HR‐TEM, XPS as well as electrochemical analysis. Interestingly, no information of the doped Mo appeared in the XRD patterns. The reasonable deduction is that Mo might be confined in the amorphous area. The highly developed interface, enhanced conductivity, larger active surface area, abundant oxygen vacancies, and redistribution of electrons among these elements resulted in the significantly enhanced electrocatalytic activity. The optimized Mo‐doped hybrid Cu/Co oxide exhibited catalytic activity with an overpotential of 88 mV to obtain a current density of 10 mA cm−2 in alkaline electrolyte with scarce loss of the initial catalyst activity for 28 h and over 5000 cycles. This work may provide a channel to enhance the performance in the HER.

show abstract

“…As the solvent interactions are also important at the electrodeelectrolyte interface, the study of the water interactions with all the representative surfaces is done separately, although we expect trends in the interaction between the VO 2+ /VO2 + redox couple and the electrode surfaces to be independent of the solvent. The adsorption energies can provide insights into the reactant species' interactions with the electrode surface and can be related to the kinetics of the reaction [34][35][36]. So, in this study, adsorption energies of V (IV), V (V), and H2O are determined on the surfaces of graphite felt (GF) using the following equation.…”

Section: With Hydrogen (Bg-d-h) E) Basal Defect (Bg-d) F) Basal Defect Saturated With a Hydroxyl Group (Bg-d-oh) G) Basal Defect Saturatementioning

confidence: 99%

The Role of Oxygenic Groups and Sp3 Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries

Argani¹,

Haile²,

Tzedakis³

et al. 2021

Preprint

View full text Add to dashboard Cite

Graphite felt is a widely used electrode material for vanadium redox flow batteries. Electrode activation leads to the functionalization of the graphite surface with epoxy, OH, C=O, and COOH oxygenic groups and changes the carbon surface morphology and electronic structure; thus, improving the electrode’s electroactivity relative to the untreated graphite. In this study, we conduct density functional theory (DFT) calculations to evaluate functionalization’s role towards the positive half-cell reaction of the vanadium redox flow battery. The DFT calculations show that oxygenic groups improve the graphite felt’s affinity towards the VO2+/VO2+ redox couple in the following order: C=O > COOH > OH > basal plane. Projected density of states (PDOS) calculations show that these groups increase the electrode’s sp3 hybridization in the same order. We conclude that the increase in the sp3 hybridization is responsible for the improved electroactivity, while the oxygenic groups’ presence is responsible for this sp3 increment. These insights can help in the better selection of activation processes and optimization of their parameters.

show abstract

Synergistic effect of adsorption coupled with catalysis based on graphene-supported MOF hybrid aerogel for promoted removal of dyes

Abstract: A three-dimensional MIL-100(Fe)/graphene hybrid aerogel was fabricated for highly efficient removal of dye pollutants via synergistic adsorption and degradation.

Cited by 44 publications

References 36 publications

Hierarchical Porous Graphene–Iron Carbide Hybrid Derived From Functionalized Graphene-Based Metal–Organic Gel as Efficient Electrochemical Dopamine Sensor

Hierarchical Porous Graphene–Iron Carbide Hybrid Derived From Functionalized Graphene-Based Metal–Organic Gel as Efficient Electrochemical Dopamine Sensor

Mo‐Doped Cu/Co Hybrid Oxide Nanoarrays: An Enhanced Electrocatalytic Performance for the Hydrogen Evolution Reaction

The Role of Oxygenic Groups and Sp3 Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries

Contact Info

Product

Resources

About