Highly efficient degradation of reactive black KN-B dye by ultraviolet light responsive ZIF-8 photocatalysts with different morphologies

Trung, Le Gia; Nguyen, Minh Kim; Nguyen, Teron; Tran, Vy Anh; Gwag, Jin Seog; Tran, Nguyen Tien

doi:10.1039/d2ra08312d

Cited by 16 publications

(3 citation statements)

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“…7(c)). 67 The profile continues with a weak absorption tail at longer wavelengths. A similar spectrum is also noticed for ZIF‐8 (84% RH).…”

Section: Resultsmentioning

confidence: 96%

Adsorption and photoactivity performances of copper(II)–benzene‐1,3,5‐tricarboxylate (Cu‐BTC) and zeolitic imidazolate framework (ZIF‐8): effect of humidity

Tuncel,

Ökte

2023

J of Chemical Tech & Biotech

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BACKGROUNDIn this study, adsorption properties and photocatalytic activities of Cu‐BTC and ZIF‐8 are explored using an anionic dye, methyl orange (MO) and a cationic dye, methylene blue (MB). Effect of humidity on the stabilities and performances of Cu‐BTC and ZIF‐8 is controlled under 40%, 67% and 84% relative humidity (RH) conditions. Cu‐BTC, ZIF‐8 and humidified samples are characterized by various techniques.RESULTSHumidified samples do not exhibit new X‐ray diffraction (XRD) peaks and significant variations in the Scanning electron microscopy (SEM) images and UV‐Vis diffuse reflectance (UV‐Vis DRS) spectra. After degradation experiments, XRD, X‐ray photoelectron spectra (XPS) and UV‐Vis DRS confirm the coexistence of Cu1+ and Cu2+ in Cu‐BTC and the formation of ZnO in ZIF‐8. Reduction in surface area (BET) measurements and detection of N and S signals in energy dispersive X‐ray (EDX) analysis prove interaction of MO and MB. Adsorptions of MO and MB are proposed via electrostatic attraction, Π‐Π interaction, and hydrogen bonding and conform to pseudo‐second order kinetics. Langmuir and Freudlich models describe the adsorption isotherms of MO and MB. Ligand‐to‐metal charge transfer process is principally responsible for the photoactivities of Cu‐BTC and ZIF‐8. Cu‐BTC (84% RH) and ZIF‐8 (84% RH) exhibit the highest performances, following the Langmuir–Hinshelwood kinetics. Stability tests of Cu‐BTC, ZIF‐8 and humidified samples imply their reuse abilities.CONCLUSIONThis study correlates structural characteristics and adsorption abilities/photocatalytic performances of Cu‐BTC and ZIF‐8. Results may offer new ideas into improvement of MOFs as adsorbents and photocatalysts.This article is protected by copyright. All rights reserved.

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“…7(c)). 67 The profile continues with a weak absorption tail at longer wavelengths. A similar spectrum is also noticed for ZIF‐8 (84% RH).…”

Section: Resultsmentioning

confidence: 96%

Adsorption and photoactivity performances of copper(II)–benzene‐1,3,5‐tricarboxylate (Cu‐BTC) and zeolitic imidazolate framework (ZIF‐8): effect of humidity

Tuncel,

Ökte

2023

J of Chemical Tech & Biotech

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“…Renowned for its high porosity, chemical stability, and customizable functionalities, ZIF-8 has the potential to revolutionize the capabilities of energy devices. Moreover, when paired with nanosized metal oxide nanoparticles particles, the structural, photoelectric, and electrochemical properties of ZIF-8 are significantly optimized [5]. This enhancement facilitates an even broader range of applications in photovoltaic and energy storage technology.…”

Section: Introductionmentioning

confidence: 99%

The Optimal Doping Ratio of Fe2O3 for Enhancing the Electrochemical Stability of Zeolitic Imidazolate Framework-8 for Energy Storage Devices

Alsaba,

M. Aljohani,

Al-Ghamdi

et al. 2024

Advances in Condensed Matter Physics

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This paper aims to discover a novel composite material that has great potential for manufacturing high-performance supercapacitors suitable for diverse applications, such as electric vehicles, portable electronics, and stationary energy storage systems. Zeolitic imidazolate framework-8 (ZIF-8) doped by different concentrations up to 5 wt.% of nanosized Fe2O3 have been prepared (ZIF-8/Fe2O3). The effect of doping ratio 1, 3, and 5 wt.% on the structural and electrochemical properties of ZIF-8/Fe2O3 has been investigated. The structural characterization has been carried out using TGA, BET, XRD, and FTIR. The XRD analysis revealed that the crystalline size of our sample increased by approximately 16% as a result of doping ZIF-8 with 5 wt.% of Fe2O3. The structural analysis of the doped samples revealed that the material exhibited enhanced thermal stability and porosity, with an increase of approximately 105 m2/g. The introduction of doped nanometal oxides improved the capacitance value of ZIF-8 by significantly increasing its surface area. Additionally, the electron transport efficiency within ZIF-8/5 wt.% Fe2O3/electrode is increased. The Nyquist plot decreases as the doping of Fe2O3 increases. This indicates a decrease in the charge transfer resistance at the electrode–electrolyte interface, which is desired in applications such as batteries, fuel cells, or electrochemical sensors where faster electron transfer is needed for improved performance.

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“…The obtained platelets had high purity and well-defined shapes of fairly monodisperse hexagons with an average diameter of 160 nm and a thickness of 13 nm. Nanomaterials and their composites have recently been the subject of extensive research for their outstanding applications in a wide variety of cutting-edge fields, such as chemical detection and sensing, hydrogen storage, membranes, gas barriers, heterogeneous catalysis, − and so on. In addition, 2D nanomaterials have been intensively employed as a new potential material for various applied fields due to their excellent anisotropic characteristics, such as transparent electrodes, aligned flexible films, and optical devices. − …”

Section: Introductionmentioning

confidence: 99%

Colloidal Gibbsite Nanoparticle/Polyacrylamide Composites for Flame-Retardant Materials

Trung,

Nguyen,

Mishra

et al. 2023

ACS Appl. Nano Mater.

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nanomaterials have many potential applications. Herein, 2D colloidal gibbsite (GS) nanoparticles, [γ-Al(OH) 3 ], dispersed easily in water, are used as an effective filler for polyacrylamide (PAM) to improve their thermal degradation behaviors for applied fields in flame retardants. A composite containing 10.0 wt % GS retains more than 30.8 wt % noninflammable residues after pyrolysis (900 °C). The kinetics and thermodynamics of PAM and GS/PAM have been elaborately investigated using thermogravimetric analysis for the first time. The kinetic (activation energy, pre-exponential factor, reaction order) and thermodynamic (ΔH, ΔG, ΔS) parameters during the major decomposition zone (330−460 °C) are determined by applying Van Krevelen, Horowitz−Metzger, Coats−Redfern, Broido, Madhusudanan, Arrhenius, and Bagchi models. The results show that as the content of GS or acrylamide in composites increases, their activation energy increases or decreases, respectively. For a composite containing 10.0 wt % GS and 30.0 wt % acrylamide, compared to PAM, the activation energy reaches the highest value of 362.720 kJ/mol, the ignition time is 125 s longer, and the peak heat release rate and total heat release diminish by 44.5 and 68.8%, respectively. The presence of a kinetic compensation effect is also evident. The as-prepared GS/acrylamide is an aqueous dispersion and is hence easily surface-coated onto other flammable foams or materials by blade-coating or dipping. Our studies contribute to understanding 2D GS-blended nanocomposites in their applications as flame retardants or fire-resistant membranes.

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Highly efficient degradation of reactive black KN-B dye by ultraviolet light responsive ZIF-8 photocatalysts with different morphologies

Abstract: UV light responsive ZIF-8 photocatalysts with three morphologies were prepared via a green one-step method, and exhibited excellent degradation of KN-B dye.

Cited by 16 publications

References 87 publications

Adsorption and photoactivity performances of copper(II)–benzene‐1,3,5‐tricarboxylate (Cu‐BTC) and zeolitic imidazolate framework (ZIF‐8): effect of humidity

Adsorption and photoactivity performances of copper(II)–benzene‐1,3,5‐tricarboxylate (Cu‐BTC) and zeolitic imidazolate framework (ZIF‐8): effect of humidity

The Optimal Doping Ratio of Fe2O3 for Enhancing the Electrochemical Stability of Zeolitic Imidazolate Framework-8 for Energy Storage Devices

Colloidal Gibbsite Nanoparticle/Polyacrylamide Composites for Flame-Retardant Materials

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