Hydrothermal synthesis of novel Zn doped CuO nanoflowers as an efficient photodegradation material for textile dyes

Sonia, S.; Annsi, I. Jose; Kumar, P. Suresh; Mangalaraj, D.; Viswanathan, C.; Ponpandian, N.

doi:10.1016/j.matlet.2015.01.026

Cited by 65 publications

(24 citation statements)

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“…The most active area of research in recent year is the nanotechnology materials, the scale of nonmaterial from 1 to 100 nm, increased in application of nanoparticles due to large surface area, high thermal stability, and wide applicability in many areas, such as, chemistry energy, electronics, catalysis, and photochemistry [7], [8]. The sol-gel method is used for preparation nanoparticles alumina, and several oxides [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel γ-Al2O3 Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters

Thabet¹,

Ismaiel²

2016

JEAS

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The adsorption behavior of eosin yellow (EY) from aqueous solution onto γ-Al 2 O 3 nanoparticles in batch technique was studied. γ-Al 2 O 3 NPs was prepared and characterized by SEM, TEM, XRD and FTIR analysis. The effect of pH, dosage of adsorbent, contact time, temperature, and the initial concentration of dye was investigated. The maximum amount of dye removal found about 99.36% at pH 4, the adsorption dose 1 g/L, with the initial dye concentration of 100 mg/L, and the temperature of 25˚C, with contact time 120 min. The adsorption behavior of the eosin yellow dye is applicable to Langmuir isotherm model, with the maximum sorption capacity of 47.78 mg/g of γ-Al 2 O 3 . The kinetic data also described by the pseudo-second-order model with a correlation coefficient (0.9999), and the mechanism of the process showed a multi-linear steps and the intra-particle diffusion was not only rate controlling step. The adsorption process was endothermic with positive enthalpy of 121.8 kJ/mol, and showed spontaneous process with a mean free energy −5.19 kJ/mol, and increase randomness, 369.77 J/mol. k, at the adsorbent solution interface. The adsorption process was chemisorption in nature The activation energy estimated from Arrhenius and modified Arrhenius is 40.9 kJ/mol, 106.37 kJ/mol respectively. The sticking probability of EY onto Al 2 O 3 NPs very high estimated from the value of S * < 1, (4.82E−19).

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Section: Introductionmentioning

confidence: 99%

Sol-Gel γ-Al2O3 Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters

Thabet¹,

Ismaiel²

2016

JEAS

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“…Much effort has been devoted to develop visible-light-sensitive photocatalysts, including modification of photocatalyst by doping with elements such as N, C and S (Liu and Chen, 2008;Pan et al, 2013;Selvaraj et al, 2013;Nezamzadeh-Ejhieh and Shirzadi, 2014;Kerkez and Boz, 2015;Sonia et al, 2015). Generally, the doped semiconductor shows higher activity than the undoped counterpart owing to the introduction of localized state above the valence band (Pan et al, 2013;Chen et al, 2015;Ruzimuradov et al, 2015).…”

Section: Crystalline Structure Effectmentioning

confidence: 99%

Photocatalytic Reactors Dedicated to the Degradation of Hazardous Organic Pollutants: Kinetics, Mechanistic Aspects, and Design – A Review

Zeghioud

Khellaf

Djelal

et al. 2016

Chemical Engineering Communications

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International audienceIn recent years, heterogeneous photocatalysis has emerged as a new effective, powerful, clean, and safe decontamination technology for the treatment of organic pollutants and the transformation of hazardous chemicals into different forms. This review focuses on the recent development of various conventional technologies of reactors designated for the photodegradation of hazardous organic pollutants with their limitations. This phenomenon is strongly influenced by reaction conditions such as temperature of reaction, pH, light intensity and wavelength, pollutant concentration, photocatalyst quantity, relative humidity (RH), and other parameters. The catalyst photoactivity depends on the structural characteristics of the semiconductor, its morphology, and its particles size. This paper presents the progression of photocatalytic reactors for synthetic dyes degradation with special consideration to the use of supported photocatalyst and nanostructured titanium supported over volcanic ashes, owing to the major advantage of an easy separation of the catalyst when compared to homogenous system, namely suspended catalyst. In addition, special attention was paid to the literature dealing with the promotion of light efficiency by testing various light sources. © 2016, Copyright © Taylor & Francis Group, LLC

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“…Importantly, doping improves the gas sensing characteristics, as it provides more defect states followed by adsorption and desorption of oxygen species [17]. Among all transition metals, Zn causes more effective doping, as it has comparable ionic radii with Cu 2+ and possesses the same oxidation states [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effect of Zn Doping in CuO Octahedral Crystals towards Structural, Optical, and Gas Sensing Properties

Goyal

Rajan

et al. 2020

Crystals

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Monodispersed CuO octahedral crystals were successfully synthesized using a low-temperature co-precipitation method. Zinc doping in CuO created surface defects that enhanced oxygen adsorption on the surface crucial for gas sensing applications. Pure and Zn-doped CuO sensor films were realized using the doctor blade method. The sensor films showed selective response towards a low concentration of NO2 at a lower operating temperature of 150 °C. Doping with Zn causes the resistance of the sensor film to decrease due to the enhancement of charge carriers with an analogous improvement in the sensor response. The observed decrease in sensor resistance agreed well with the findings of the work function studies. Zinc doping resulted in an increase in work function by 180 meV which, after NO2 exposure, was found to increase by a further 130 meV, attributed to the oxidizing behavior of the test gas.

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Hydrothermal synthesis of novel Zn doped CuO nanoflowers as an efficient photodegradation material for textile dyes

Cited by 65 publications

References 20 publications

Sol-Gel <i>γ</i>-Al<sub>2</sub>O<sub>3</sub> Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters

Sol-Gel <i>γ</i>-Al<sub>2</sub>O<sub>3</sub> Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters

Photocatalytic Reactors Dedicated to the Degradation of Hazardous Organic Pollutants: Kinetics, Mechanistic Aspects, and Design – A Review

Effect of Zn Doping in CuO Octahedral Crystals towards Structural, Optical, and Gas Sensing Properties

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Hydrothermal synthesis of novel Zn doped CuO nanoflowers as an efficient photodegradation material for textile dyes

Cited by 65 publications

References 20 publications

Sol-Gel &lt;i&gt;γ&lt;/i&gt;-Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters

Sol-Gel &lt;i&gt;γ&lt;/i&gt;-Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters

Photocatalytic Reactors Dedicated to the Degradation of Hazardous Organic Pollutants: Kinetics, Mechanistic Aspects, and Design – A Review

Effect of Zn Doping in CuO Octahedral Crystals towards Structural, Optical, and Gas Sensing Properties

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Sol-Gel <i>γ</i>-Al<sub>2</sub>O<sub>3</sub> Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters

Sol-Gel <i>γ</i>-Al<sub>2</sub>O<sub>3</sub> Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters