Electrodeposited zinc phosphate hydrate electrodes for electrocatalytic applications

Chennah, A.; Naciri, Yassine; Taoufyq, A.; Bakiz, B.; Bazzi, L.; Guinneton, F.; Villain, S.; Gavarri, J.R.; Benlhachemi, A.

doi:10.1007/s10800-018-1261-8

Cited by 30 publications

(16 citation statements)

References 49 publications

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“…Many authors (Chennah et al, ; Fu, Pan, Yao, & Zhu, ) have shown that hydroxyl radicals are the main oxidizing species during electro‐degradation of organics. Indeed, these species with the high oxidizing ability they are able to degrade the organic pollutants adsorbed on the surface of the material.…”

Section: Resultsmentioning

confidence: 99%

“…These organic compounds can be degraded photocatalytically under UV light or electrocatalycally by applying a current density at the anode material (Baddouh et al, ; Garcia‐Segura & Brillas, ; Holkar, Jadhav, Pinjari, Mahamuni, & Pandit, ; Martínez‐Huitle & Brillas, ). Different semiconductor photocatalysts have been explored, including metal oxides (Núñez et al, ; Yu et al, ), phosphates (Chennah et al, , ; Naciri et al, ; Zeng et al, ), etc. However, most of these materials still suffer from the rapid recombination of photo‐induced carriers, and the poor light utilization, which limits their photocatalytic efficiency and thus their practical application.…”

Section: Introductionmentioning

confidence: 99%

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Highly efficient nanostructured CoFe₂O₄ thin film electrodes for electrochemical degradation of rhodamine B

Labchir

Amaterz

Hannour

et al. 2019

Water Environment Research

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In this work, we report the application of highly efficient electrodeposited cobalt ferrite (CoFe 2 O 4 ) thin films in electrochemical degradation of rhodamine B. XRD, FTIR and Raman spectroscopic studies confirmed the formation of single phase CoFe 2 O 4 . SEM analysis revealed a very fine nanorods dispersed uniformly with average size around 30 nm. UV-Vis spectrophotometry emphasized that the optical band gap value is 1.6 eV. Moreover, the elaborated CoFe 2 O 4 thin films showed a good efficiency for the electrochemical degradation of an aqueous solution of rhodamine B (RhB) attaining 99% during the first 3 min of reaction time. The trapping experiments revealed that the hydroxyl radicals were the main active species leading to the removal of RhB initial concentration of 10 mg/L in a very short time. © 2019 Water Environment Federation • Practitioner points• A simple electrodeposition technique was used to fabricate CoFe 2 O 4 thin.• XRD and FTIR studies revealed the formation of pure cubic spinel phase. • Nano-rod like morphology has been successfully synthesized. • The rhodamine B aqueous solution has been completely decolorized using the obtained CoFe 2 O 4 thin films.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly efficient nanostructured CoFe₂O₄ thin film electrodes for electrochemical degradation of rhodamine B

Labchir

Amaterz

Hannour

et al. 2019

Water Environment Research

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“…Other compounds such as TiO 2 (Im, Son, Kang, & Zoh, 2012), ZnO (Tanveer, Guyer, & Abbas, 2019), Bi 2 MoO 6 (Bi et al, 2007), BaSO 4 (Cui et al, 2019), Ag 3 PO 4 (Ge, 2014), Na 3 Bi 2 (PO 4 ) 3 (Huang, Chen, & Zhang, 2014), Zn 3 (PO 4 ) 2 (Naciri et al, 2018), Mn 3 (PO 4 ) 2 (Bouddouch et al, 2019), and BiVO 4 (Zhou et al, 2006)were also studied. Recently, we have developed studies on phosphate‐based phases for electrocatalytic applications (Chennah, Naciri, Ahsaine, et al, 2018; Chennah, Naciri, Taoufyq, et al, 2018; Ghalwa & Zaggout, 2006). Presently, we focus our attention on the role of structural and surface defects (Cui et al, 2019; Li et al, 2020; Liao et al, 2020) susceptible to deliver new photocatalytic or photoluminescence properties in phosphate materials.…”

Section: Introductionmentioning

confidence: 99%

Role of thermal decomposition process in the photocatalytic or photoluminescence properties of BiPO₄ polymorphs

Bouddouch

Amaterz

Bakiz

et al. 2020

Water Environment Research

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Thermal decomposition process was used to obtain modified photocatalytic and/or photoluminescence properties of bismuth phosphate polymorphs. The precursor BiPO4, 0.7H2O was synthesized by a coprecipitation route. The observed polymorphs were the hexagonal P3121 hydrate phase BiPO4, 0.7H2O at 25°C, a mix system of hexagonal and monoclinic P21/n phases at 200°C and 400°C, a mix system of monoclinic phases P21/n and P21/m at 600°C, and a unique monoclinic phase P21/m at 900°C. The X‐ray diffraction analyses allowed evidencing lattice deformations due to structural defects. The photocatalytic activities in the presence of rhodamine B in aqueous solution were determined using UV light irradiation. The best photocatalytic efficiencies were observed with the mix systems resulting from thermal decomposition at 400 and 600°C. Photoluminescence experiments performed under UV‐laser light irradiation revealed unexpected emissions in the green‐orange range, with optimal intensities for the mix systems observed at 400°C. The role of structural defects resulting from decomposition process is discussed. Practitioner points Thermal decomposition is used to introduce structural defects in BiPO4 polymorphs The BiPO4 intermediate systems are used to photodegrade rhodamine B Active species trapping experiments are performed Photoluminescence experiments highlight green‐orange emissions Structural defects are at the origin of this photoluminescence

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“…To overcome these disadvantages, advanced oxidation processes (AOPs) should be preferentially used. Among these AOPs are, photocatalysis, electrocatalysis, photo‐electrocatalysis, electro‐Fenton, Fenton, peroxicoagulation, photo‐Fenton, sono‐Fenton, sonochemical methods, hydrodynamic cavitation, zero valent metals based AOPs, and oxidation processes based on the use of radicals (SO 4 −• , OH • ) . However, the oxidation by the radicals of sulfate SO 4 −• attracted a lot of attention because of the high oxidation potential that is expected at 2.01 V compared to others radicals .…”

Section: Introductionmentioning

confidence: 99%

“…To overcome these disadvantages, advanced oxidation processes (AOPs) should be preferentially used. Among these AOPs are, photocatalysis, [10][11][12] electrocatalysis, 13 photo-electrocatalysis, 14 electro-Fenton, [15][16][17][18] Fenton, 19,20 peroxicoagulation, 21,22 photo-Fenton, 23 sono-Fenton, 24 sonochemical methods, 25 hydrodynamic cavitation, 26 zero valent metals based AOPs, 27,28 and oxidation processes based on the use of radicals (SO 4 −• , OH • ). 29,30 However, the oxidation by the radicals…”

Section: Introductionmentioning

confidence: 99%

Polyaniline coated hematite sand supported on graphene oxide (HS@PANI‐GO) as a new magnetic material for advanced catalytic oxidation based on sulfate radicals: optimization using response surface methodology

Fakir

Anfar

Benafqir

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: We report here on the synthesis of a new magnetic and natural material: polyaniline coated hematite sand supported on graphene oxide (HS@PANI-GO) which was used as an heterogeneous catalyst to activate persulfate (PS) for aqueous solution Orange G (OG) degradation. RESULTS:The characterization results have revealed that the hematite sand is rich in iron oxide, and the inorganic particles were well coated with polyaniline and successfully dispersed in graphene oxide. Further, catalytic oxidation experiments demonstrated that HS@PANI-GO material exhibited high activity in the PS activation for the OG degradation. It was found that complete OG removal from aqueous solution was achieved in 90 min at natural pH. In addition, the influence of various reaction conditions such as temperature, concentration of PS, catalyst dose, pH and decomposition time over the HS@PAN-GO/PS system were investigated and optimized. The catalyst HS@PAN-GO could be recycled easily by a magnet with good reusability. Finally, the effects of various parameters such as PS concentration, catalyst dose, initial OG concentration, and contact time, were investigated using the response surface methodology (RSM). It transpires that the experimental elimination of OG is 98.14%, as obtained under optimal conditions, was very close to the predicted value (96.58%) determined by RSM. CONCLUSION: This study provides a promising way for the activation of green oxidant 'PS', by using a new magnetic composite suited for environmental remediation and oxidation catalysis. RESULTS AND DISCUSSIONS CharacterizationThe crystalline structures of the various materials as determined by XRD are shown in Fig. 1. (JCPDS NO 33-0664). According to the XRD profile, the majority of the peaks observed at 2 = 24.19 ∘ , Figure 2. Scanning electron microscopy (SEM) images of (a, b) HS and (c, d) of HS@PANI.

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Electrodeposited zinc phosphate hydrate electrodes for electrocatalytic applications

Cited by 30 publications

References 49 publications

Highly efficient nanostructured CoFe₂O₄ thin film electrodes for electrochemical degradation of rhodamine B

Highly efficient nanostructured CoFe₂O₄ thin film electrodes for electrochemical degradation of rhodamine B

Role of thermal decomposition process in the photocatalytic or photoluminescence properties of BiPO₄ polymorphs

Polyaniline coated hematite sand supported on graphene oxide (HS@PANI‐GO) as a new magnetic material for advanced catalytic oxidation based on sulfate radicals: optimization using response surface methodology

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Electrodeposited zinc phosphate hydrate electrodes for electrocatalytic applications

Cited by 30 publications

References 49 publications

Highly efficient nanostructured CoFe2O4 thin film electrodes for electrochemical degradation of rhodamine B

Highly efficient nanostructured CoFe2O4 thin film electrodes for electrochemical degradation of rhodamine B

Role of thermal decomposition process in the photocatalytic or photoluminescence properties of BiPO4 polymorphs

Polyaniline coated hematite sand supported on graphene oxide (HS@PANI‐GO) as a new magnetic material for advanced catalytic oxidation based on sulfate radicals: optimization using response surface methodology

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Highly efficient nanostructured CoFe₂O₄ thin film electrodes for electrochemical degradation of rhodamine B

Highly efficient nanostructured CoFe₂O₄ thin film electrodes for electrochemical degradation of rhodamine B

Role of thermal decomposition process in the photocatalytic or photoluminescence properties of BiPO₄ polymorphs