Preparation and Photocatalysis of CuO/Bentonite Based on Adsorption and Photocatalytic Activity

Yang, Cuina; Xu, Hongfa; Shi, Jicun; Liu, Zhifeng; Zhao, Lei

doi:10.3390/ma14195803

Cited by 9 publications

(2 citation statements)

References 44 publications

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“…As indicated in figure 19, this might be due to the homogeneous distribution of more number of ZnO nano particles photocatalyst with average particle size of 30.06 nm in the bentonite matrix as it is observed on its TEM micrographs for ZB11 and less number of ZnO nanoparticles photocatalyst in the bentonite matrix for ZB13. Semiconductors metal oxide like TiO 2 , ZrO 2 , CuO and ZnO NPs with optimum size Immobilized on Bentonite Clay resulted with better photo-catalytic efficiency [13,21,25,47,48]. The mechanism of photocatalysis of contaminants using ZnO photocatalyst in presence of UV irradiation is shown below as reported by different groups.…”

Section: Photodegradation Of Mb Dye By Zno/bentonite Nanocomposites (Zb)mentioning

confidence: 81%

Preparation and photocatalysis of ZnO/bentonite based on adsorption and photocatalytic activity

Jida

Zereffa²

2023

Mater. Res. Express

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This article focus on the adsorption and photocataltytic study of methylene blue (MB) dye from aqueous solution with sodium carbonate-activated bentonite adsorbent and ZnO/Bentonite photocatalyst. The activated bentonite adsorbent and ZnO/bentonite nanocomposites photocatalysts were prepared and characterized using XRD, FT-IR, SEM, TEM and AAS. The adsorption experiment was conducted using 5% sodium carbonate activated bentonite (AB5) to establish the effect of different parameters. The adsorption isotherm was performed using Langiumer, Freundlich, and Temkin isotherm models. The result showed the Langiumer adsorption isotherm best fit the adsorption study for the experimental data with R2=1. The kinetic adsorption of MB dye by activated bentonite was conducted using pseudo-first and pseudo-second-order models. The result revealed that the pseudo-second-order fit experimental data well and the process was chemisorption. The endothermic and spontaneous nature of the adsorption process of MB dye AB5 was carried by studying the thermodynamic parameters of the system. Desorption of MB dye from the spent adsorbent and recyclability of adsorbent was studied by thermo-chemical methods. The desorption capacity of MB dye in the selected solvents were small. The adsorbent developed for this study was recycled and its adsorption capacity decreases with adsorbent recycling time. But, the photo-degradation studies conducted using the synthesized ZnO/Bentonite photocatalyst@550(1:1) with average particle size of 30.06 nm resulted with 99.54 % degradation efficiency of MB.

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Section: Photodegradation Of Mb Dye By Zno/bentonite Nanocomposites (Zb)mentioning

confidence: 81%

Preparation and photocatalysis of ZnO/bentonite based on adsorption and photocatalytic activity

Jida

Zereffa²

2023

Mater. Res. Express

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“…Noteworthy peaks are evident at 2θ values of 32.7°, 35.7°, 38.9° and 48.1°, corresponding to the crystal phases of (1 1 0), (1 1 −1), (1 1 1) and (2 0 −2) of CuO, respectively, and agree with the XRD pattern at JCPPDS card no. 80−1916 of CuO [ 30 , 31 ]. The absence of peaks at 2θ values of 43.5°, 50.4° and 74.2° (JCPDS No.…”

Section: Resultsmentioning

confidence: 99%

MOP−18−Derived CuO Fiber for Hybrid Supercapacitor Electrodes

Haque,

Balkus,

Ferraris

2024

Materials

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This study explores a simple method of fabricating hybrid supercapacitor electrodes, which could potentially broaden the application of this technology. The method involves electrospinning a uniform solution of Matrimid/Metal−Organic Polyhedra 18 (MOP−18) followed by carbonization at a relatively low temperature of 700 °C in air, rather than in an inert atmosphere, to create free−standing, redox−active hybrid supercapacitor electrodes. Additionally, the synthesis procedure requires no stabilization or activation steps, which enhances the cost effectiveness of the synthesized electrode materials. The resulting C/CuO composite was used as the working electrode, with a polyacrylonitrile (PAN)/Poly(methyl methacrylate) (PMMA) carbon nanofiber (CNF) electrode as the counter and 6 M KOH as the electrolyte in a T−cell configuration. The cell performance and redox activity were evaluated using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), electrochemical impedance spectroscopy (EIS) and cycling stability tests. Additionally, the physical and chemical structures of the electrode materials were assessed using X−ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron spectroscopy (TEM), X−ray diffractometry (PXRD), surface area analysis and other characterization techniques. The electrode material demonstrated a specific capacitance of up to 206 F/g. Supercapacitors utilizing this material display an energy density of 10.3 Wh/kg (active material) at a current density of 1 A/g in electrochemical testing.

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One-step synthesis of CuO/MCM-41 nanocomposites and their application in photocatalytic degradation of dyes

Zhang,

Yu,

et al. 2024

J Porous Mater

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Preparation and Photocatalysis of CuO/Bentonite Based on Adsorption and Photocatalytic Activity

Cited by 9 publications

References 44 publications

Preparation and photocatalysis of ZnO/bentonite based on adsorption and photocatalytic activity

Preparation and photocatalysis of ZnO/bentonite based on adsorption and photocatalytic activity

MOP−18−Derived CuO Fiber for Hybrid Supercapacitor Electrodes

One-step synthesis of CuO/MCM-41 nanocomposites and their application in photocatalytic degradation of dyes

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