Facile synthesis of n-ZnO @ p-CuO nanocomposite for water purification enhanced decolorization of methyl orange

Mahendiran, M.; Mathen, Jobin Job; Racik, K. Mohamed; Madhavan, J.; Raj, M. Victor Antony

doi:10.1007/s10854-019-01980-z

Cited by 18 publications

(3 citation statements)

References 45 publications

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“…Therefore, research on the photodecolorization and degradation of MO is very important. There are many examples of ZnO nanomaterials being used for the decolorization of MO, and the chemical and physical mechanisms for the catalysis are well known [ 61 , 62 , 63 , 64 , 65 ]; Based on that information, we have chosen the photodecolorization experiment as a model system to test the activity of ZnO. Figure 5 A presents the UV-Vis spectra of MO; the purple and yellow lines correspond to spectra before and after exposure to UV light, showing only slight decolorization of the dye (3.3%), while the red, green, blue, and orange lines correspond to MO absorbance after the reaction with the catalyst and exposure to UV light.…”

Section: Resultsmentioning

confidence: 99%

Solvent-Free Mechanochemical Synthesis of ZnO Nanoparticles by High-Energy Ball Milling of ε-Zn(OH)2 Crystals

2021

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A detailed investigation is presented for the solvent-free mechanochemical synthesis of zinc oxide nanoparticles from ε-Zn(OH)2 crystals by high-energy ball milling. Only a few works have ever explored the dry synthetic route from ε-Zn(OH)2 to ZnO. The milling process of ε-Zn(OH)2 was done in ambient conditions with a 1:100 powder/ball mass ratio, and it produced uniform ZnO nanoparticles with sizes of 10–30 nm, based on the milling duration. The process was carefully monitored and the effect of the milling duration on the powder composition, nanoparticle size and strain, optical properties, aggregate size, and material activity was examined using XRD, TEM, DLS, UV-Vis, and FTIR. The mechanism for the transformation of ε-Zn(OH)2 to ZnO was studied by TGA and XPS analysis. The study gave proof for a reaction mechanism starting with a phase transition of crystalline ε-Zn(OH)2 to amorphous Zn(OH)2, followed by decomposition to ZnO and water. To the best of our knowledge, this mechanochemical approach for synthesizing ZnO from ε-Zn(OH)2 is completely novel. ε-Zn(OH)2 crystals are very easy to obtain, and the milling process is done in ambient conditions; therefore, this work provides a simple, cheap, and solvent-free way to produce ZnO nanoparticles in dry conditions. We believe that this study could help to shed some light on the solvent-free transition from ε-Zn(OH)2 to ZnO and that it could offer a new synthetic route for synthesizing ZnO nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Solvent-Free Mechanochemical Synthesis of ZnO Nanoparticles by High-Energy Ball Milling of ε-Zn(OH)2 Crystals

2021

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“…), loading a noble metal 26 (Au, 27 Ag, 12,[28][29][30] Pt, 26,31 Pd, Cu, 32 etc. ), coupling with other oxides or sulfides (such as Fe 2 O 3 , [33][34][35] TiO 2 , [36][37][38][39][40] NiO, SnO 2 , CuO, 41 CdS, ZnS, WS 2 , 42 etc. ), and doping more than one kind of these materials.…”

Section: Introductionmentioning

confidence: 99%

One-step fabrication and photocatalytic performance of sea urchin-like CuO/ZnO heterostructures

et al. 2022

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“…Today, many researchers prefer photocatalytic nanocatalysts to remove the color caused by organic environmental pollutants. Photocatalytic nanocatalysts are widely used for color removal from wastewater due to their high photocatalytic efficiency, low cost and non-toxicity [30,31].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the usability of zinc ferrite nanoparticles synthesized by microwave assisted combustion method as photocatalyst for removal of organic dyes from wastewaters

Karakaş

2021

Environmental Research and Technology

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In this study, zinc ferrite nanoparticles, which has an important place among the spinel ferrite structured nanomaterials due to its unique properties, were synthesized by microwave-assisted combustion method and later were used as photocatalysts in the removal of dyestuffs by photocatalytic degradation method from wastewaters of textile industry. In the synthesis studies, it was determined that the microwave effect alone was not sufficient to complete the transformation. Heat treatment application is envisaged to solve this problem and in order to determine the optimum heat treatment temperature, the sample produced by microwave effect were subjected to heat treatment at 300℃, 400℃, 500℃, 600℃, 700℃, 800℃ and 900℃, respectively. It has been observed that the heat treatment has a significant effect on the crystal structure of the particles and 700℃ has been determined as the optimum heat treatment temperature. The data obtained showed that, under these conditions, the zinc ferrite nanoparticles were successfully synthesized and the powder produced completely consisted of nano-sized particles. Moreover, results showed that the synthesized zinc ferrite nanoparticles has a saturation magnetization value sufficient to separate them from the aqueous medium. Finally, zinc ferrite nanoparticles produced under optimum conditions were used as photocatalysts in the removal of textile dye known as Procion Yellow HE-3G from wastewater by photocatalytic oxidation. In photocatalysis experiments, it was observed that synthesized zinc ferrite nanoparticles provided very high removal efficiencies as photocatalysts and almost all of the dye content in the solution could be removed.

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Facile synthesis of n-ZnO @ p-CuO nanocomposite for water purification enhanced decolorization of methyl orange

Cited by 18 publications

References 45 publications

Solvent-Free Mechanochemical Synthesis of ZnO Nanoparticles by High-Energy Ball Milling of ε-Zn(OH)2 Crystals

Solvent-Free Mechanochemical Synthesis of ZnO Nanoparticles by High-Energy Ball Milling of ε-Zn(OH)2 Crystals

One-step fabrication and photocatalytic performance of sea urchin-like CuO/ZnO heterostructures

Investigation of the usability of zinc ferrite nanoparticles synthesized by microwave assisted combustion method as photocatalyst for removal of organic dyes from wastewaters

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