Copper hydroxyphosphate as catalyst for the wet hydrogen peroxide oxidation of azo dyes

Zhan, Yanhui; Li, Hailong; Chen, Yiliang

doi:10.1016/j.jhazmat.2010.04.055

Cited by 79 publications

(25 citation statements)

References 32 publications

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“…The results indicate that the catalytic activity of Cu-Clay increases with the increase of initial pH ( Figure.7). Similar conclusions have been reported when using copper as active species to degrade organic contaminant, through either heterogeneous [26,27]. Or homogeneous processes [28][29][30].…”

Section:  Effect Of Initial Phsupporting

confidence: 83%

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 Initial Phsupporting

confidence: 83%

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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“…In order to obtain solid catalysts with more excellent performance, it is still necessary to test and develop novel catalytic materials. Recently, we reported that copper hydroxyphosphate (Cu 2 (OH)PO 4 ), a basic copper salt without micropores or mesopores, showed considerable activity for oxidative degradation of an azo dye under near-neutral pH conditions [13]. Here we report the synthesis and catalytic properties about another basic copper salt, copper hydroxide nitrate (Cu 2 (OH) 3 …”

Section: Introductionmentioning

confidence: 89%

Catalytic wet peroxide oxidation of azo dye (Direct Blue 15) using solvothermally synthesized copper hydroxide nitrate as catalyst

Zhan

Zhou

et al. 2011

Journal of Hazardous Materials

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“…Similar results have been reported by various investigators using copper as active species. 37,38 The natural pH of 100 mg/L pyridine solution was 6.2-6.3. A near-neutral pH (or natural pH) condition is preferable due to ease of operation in large-scale industrial application.…”

Section: Effect Of Phmentioning

confidence: 99%

Catalytic Activity of Cu/SBA‐15 for Peroxidation of Pyridine Bearing Wastewater at Atmospheric Condition

2013

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In this study, Cu-loaded Santa Barbara amorphous (SBA)-15 catalysts were synthesized by impregnation method and further used for catalytic wet peroxidation (CWPO) of pyridine from aqueous solution using hydrogen peroxide as oxidant. The synthesized catalysts have been characterized by Brunauer-Emmett-Teller surface area: temperature-programmed reduction, H 2 -chemisorption, Fourier transform infrared spectroscopy, and field emission scanning electron microscopy. Characterization results indicate good dispersion of Cu species inside the porous structure of SBA-15. The effect of various parameters such as Cu loading on SBA-15, pH, catalyst dose, H 2 O 2 concentration, and temperature have been studied for their effect on CWPO of pyridine. More than 97% pyridine removal and 92% total organic carbon removal was achieved at optimum condition. Cu/SBA-15 showed stable performance during reuse for six cycles with negligible copper leaching.

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Copper hydroxyphosphate as catalyst for the wet hydrogen peroxide oxidation of azo dyes

Cited by 79 publications

References 32 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

Catalytic wet peroxide oxidation of azo dye (Direct Blue 15) using solvothermally synthesized copper hydroxide nitrate as catalyst

Catalytic Activity of Cu/SBA‐15 for Peroxidation of Pyridine Bearing Wastewater at Atmospheric Condition

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