Synthesis and characterization of MgO nanocrystals using strong and weak bases

Mehta, Mitul C.; Mukhopadhyay, Mausami; Christian, R. A.; Mistry, Narendra

doi:10.1016/j.powtec.2012.04.044

Cited by 25 publications

(8 citation statements)

References 14 publications

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“…The MgO nanoparticles were prepared via a precipitation method. 39,40 Diazinon was purchased from Sigma-Aldrich (Germany) and was of analytical grade. All solutions were made with ultra-pure water (with an electrical resistance of 18 mU cm at 25 C).…”

Section: Methodsmentioning

confidence: 99%

The catalytic ozonation of diazinon using nano-MgO@CNT@Gr as a new heterogenous catalyst: the optimization of effective factors by response surface methodology

et al. 2020

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Section: Methodsmentioning

confidence: 99%

The catalytic ozonation of diazinon using nano-MgO@CNT@Gr as a new heterogenous catalyst: the optimization of effective factors by response surface methodology

et al. 2020

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“…The PDI value obtained for all samples is >0.4, which shows that particles are solely dispersed in water. 40 The hydrodynamic diameters of MgO A (ca. 1300−2900 nm) obtained are 5 times more than those of MgO S (ca.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Pickering Interfacial Catalysis—Knoevenagel Condensation in Magnesium Oxide-Stabilized Pickering Emulsion

2020

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In the present study, a novel catalytic route for the Knoevenagel condensation reaction has been developed by Pickering interfacial catalysis using magnesium oxide (MgO) as both an emulsion stabilizer and a base catalyst. MgO was prepared by the precipitation method using sodium hydroxide or ammonium hydroxide as the precipitating agent and calcined at different temperatures. The calcined samples were characterized by XRD, SEM, TEM, AFM, BET, and DLS techniques. The catalytic application of the emulsions stabilized by MgO was investigated for the Knoevenagel condensation reaction of benzaldehyde and its derivatives with malononitrile. All of the reactions were carried out at an ambient temperature (30 °C) under static conditions without stirring. Both the emulsion-stabilizing ability and the catalytic activity of MgO were found to be affected by the method of preparation, calcination temperature, and the nature of the oil phase. It was observed that the method of preparation varied the texture and morphology of MgO and thus the stability and droplet size of the emulsion formed. This was further reflected in the catalytic activity. The highest yield (87%) of the condensation product was obtained with MgO prepared by precipitation using a strong base (NaOH) and further calcined at 400 °C. The developed catalytic system offers several green chemistry advantages such as reusable solid-base catalyst and use of a single material as both emulsion stabilizer and catalyst. Room-temperature reaction under static conditions is an additional advantage of the developed catalytic system.

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“…Then precipitates of MgO were dried in oven at 65°C for 3-4 hours and then placed in muffle furnace at 480°C for 3-4 hours. White colored powdered MgO nanoparticles were prepared [2].…”

Section: Experimental Work a Synthesis Of Adsorbentmentioning

confidence: 99%

“…Predetermined dye solutions were taken in conical flasks and measured amounts of the adsorbent were added into it. All the conditions were kept constant in each experiment except for the one which was under examination [2]. 3 shows primarily, it was observed that at pH 2 the sample showed absorption at around 579 nm.…”

Section: B Batch Studymentioning

confidence: 99%

Treatment of Textile/Dye Wastewater by Adsorption Using Metal Oxide Nano Particles

Borad¹

2021

IJRASET

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Textile industries produce large amounts of waste water. Presence of various dyes like reactive dyes, azo dyes, anthraquinone dyes, etc.is noted in textile industry effluent. In this work we intend to target azo dyes and anthraquinone dyes which has various colouring and toxic effects. Literature review shows that there are various sustainable wastewater treatments namely adsorption, electro-coagulation, ultrasonic treatment, etc. The present investigation intends to discuss the adsorption method for the treatment of industrial wastewater using metal oxide nanoparticles. Literature review supports the use of synthesized porous MgO powder at Nanoscale for the removal of dyes from aqueous solution. Results indicate that the MgO powder can remove more than 98% of both dyes under optimum operational conditions. At various MgO dosages, dye concentrations, solution pH and contact time in a batch reactor are studied. The analysis is followed by FTIR & XRD. Keyword: Waste-water, MgO, Nano particle, Adsorption, Congo red

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Synthesis and characterization of MgO nanocrystals using strong and weak bases

Cited by 25 publications

References 14 publications

The catalytic ozonation of diazinon using nano-MgO@CNT@Gr as a new heterogenous catalyst: the optimization of effective factors by response surface methodology

The catalytic ozonation of diazinon using nano-MgO@CNT@Gr as a new heterogenous catalyst: the optimization of effective factors by response surface methodology

Pickering Interfacial Catalysis—Knoevenagel Condensation in Magnesium Oxide-Stabilized Pickering Emulsion

Treatment of Textile/Dye Wastewater by Adsorption Using Metal Oxide Nano Particles

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