Preparation of Cu2(OH)3NO3/ZnO, a novel catalyst for methyl orange oxidation under ambient conditions

Srikhaow, Assadawoot; Smith, Siwaporn Meejoo

doi:10.1016/j.apcatb.2012.10.018

Cited by 53 publications

(46 citation statements)

References 42 publications

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“…There is several possible regeneration methods include refluxing method, calcination under a suitable atmosphere, rinsing by appropriate solvent or some combinations of processes [6,32] and [33]. The deactivated 5Cu-clay catalyst was regenerated rinsing in by 5% HCl solution for 5 min followed by drying at 110°C for 2 h, to remove the unreacted MO, the catalytic activity of fresh catalyst was compared with the catalytic activity of regenerated catalyst under the same condition.…”

Section:  Effect Of Peroxide Concentration On Dyementioning

confidence: 99%

Preparation and Characterisation A Catalytic System Cu-Clay for Catalytic Oxidation of Methyl Orange with H2O2

Idrissi¹,

Miyah²,

Lahrichi³

et al. 2014

IJIRSET

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ABSTRACT:In this work, the decolorization of Methyl Orange was conducted using catalysts prepared by impregnation of copper on natural clay in the presence of H 2 O 2 . The catalysts Cu-clay, prepared from the concentrated metal precursor of (impregnation ratio, W(Cu(NO 3 ) 2 )/W(clay) = 1,5%-7,5%) were characterized by several methods such as X-ray diffraction (XRD), electronic scan microscopy (SEM), x-ray fluorescence (FX), and Brunauer-EmmettTeller (BET). Important factors affecting catalyst activity and methyl orange removal efficiencies were studied: the effects of temperature, oxidant concentration, and catalyst dosage. The results showed, a very significant activation of hydrogen peroxide by the catalyst, the Methyl Orange depletion percentage reaching 94 % after 2 h, and very stability of the catalyst. It was also observed that the best catalyst, at a reaction temperature of 25°C. 2,5ml of H 2 O 2 and 4.0 g/L of 5% Cu-clay, 94% decolorization was achieved within 120 min treatment. Although the Cu show high activity, their stability and reusability still need improvement.

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Section:  Effect Of Peroxide Concentration On Dyementioning

confidence: 99%

Preparation and Characterisation A Catalytic System Cu-Clay for Catalytic Oxidation of Methyl Orange with H2O2

Idrissi¹,

Miyah²,

Lahrichi³

et al. 2014

IJIRSET

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“…[11][12][13][14] Hence, mass production of these layered materials with sufficient homogeneity is important for industry-scale applications.Anumber of methods have been used to prepare such layered hydroxyl nitrates,i ncluding precipitation of copper nitrate in basic solutions, urea hydrolysis of coppern itrate, chemical reaction between CuO and aqueous coppernitrate solution, evaporation of copper nitrate solution, hydrolysiso fu rea in the presence of copper nitrate by using ad ouble-jet precipitation approach, and simple asymmetric electrode-based cathodic plasma electrolysis. [15][16][17][18] The preparation conditions for the layered hydroxyl nitratesh ave ad irect effect on their size, structure, and composition. However,t he main drawbacks of above methods are low yield and the formation of more anisotropic particles.…”

mentioning

confidence: 99%

Sonochemical Synthesis of Layered Copper Hydroxy Nitrate Nanosheets

Anandan

Ashokkumar

2015

ChemPhysChem

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Sonochemical reduction of copper nitrate, using 20 kHz ultrasound in aqueous solutions in the presence of urea, led to the formation of layered copper hydroxy nitrate nanosheets, as evidenced by scanning and transmission electron microscopy images. Fourier-transform infrared, X-ray diffraction, and X-ray photoelectron spectroscopy analyses were used to characterize layered Cu2(OH)3NO3 nanosheets. The ultrasound-assisted progressive hydrolysis of urea and in situ formation of Cu(0) through the sonochemical reduction process induced homogeneous nucleation and crystallization of layered Cu2(OH)3NO3 nanosheets.

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“…The effect of temperature on degradation of CR was also studied. Different temperatures (15,20,25 and 30 • C) were tested as depicted in Fig. 8b.…”

Section: Effects Of Parameters On Degradation Of Crmentioning

confidence: 99%

“…However, these treatment processes required additional chemicals, high electrical power, and pH adjusting. Catalytic wet air oxidation (CWAO) has been proven to be a very promising advanced oxidation process to efficiently decolorize dyes under relatively mild conditions without light illumination [3,24,25]. Moreover, Fe 2 O 3 could also degrade dyes in dark at ambient conditions [26].…”

Section: Introductionmentioning

confidence: 99%

Rapid degradation of Congo red by molecularly imprinted polypyrrole-coated magnetic TiO2 nanoparticles in dark at ambient conditions

Wei

Liu

et al. 2015

Journal of Hazardous Materials

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Preparation of Cu2(OH)3NO3/ZnO, a novel catalyst for methyl orange oxidation under ambient conditions

Cited by 53 publications

References 42 publications

Preparation and Characterisation A Catalytic System Cu-Clay for Catalytic Oxidation of Methyl Orange with H2O2

Preparation and Characterisation A Catalytic System Cu-Clay for Catalytic Oxidation of Methyl Orange with H2O2

Sonochemical Synthesis of Layered Copper Hydroxy Nitrate Nanosheets

Rapid degradation of Congo red by molecularly imprinted polypyrrole-coated magnetic TiO2 nanoparticles in dark at ambient conditions

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