Facile synthesis, characterization and photocatalytic performance of Zn3(PO4)2 platelets toward photodegradation of Rhodamine B dye

The g-C 3 N 4 /Zn 3 (PO 4 ) 2 composites were synthesized in the aqueous medium via chemical precipitation route. The photocatalytic activity of these photocatalysts was evaluated for the degradation of aqueous crystal violet (CV) dye under solar light. The optimum photocatalytic activity of g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite was found for 30 % weight of g-C 3 N 4 . The comparison experiments showed the photocatalytic activity of the g-C 3 N 4 / Zn 3 (PO 4 ) 2 composite increased 2 times compare to bare Zn 3 (PO 4 ) 2 and 1.5 times of g-C 3 N 4 . The enhanced photocatalytic activity originates due to the transfer of photogenerated electrons from the conduction band of g-C 3 N 4 to the Zn 3 (PO 4 ) 2 which makes well-separated electron-hole pairs. The degradation capacity increases with an increase in the pH of the solution up to 8 and then decreases up to 10 and then again starts increasing. The addition of scavengers decreases degradation capacity of g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite in the order of Ethylene diamine tetra-acetic acid-Na 2 (EDTA) > tert-butyl alcohol (TBA) > L-ascorbic acid (AA). The degradation of CV over g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite mainly attributed by the holes. The interfering anions (except Br À ) decrease the degradation capacity of Zn 3 (PO 4 ) 2 whereas in the case of composite no change in the degradation capacity was observed. The recycling experiment for the degradation of CV dye was performed on bare Zn 3 (PO 4 ) 2 and g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite and found better stability and recyclability of the composite material.

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“…At pH 9, slight decrease in degradation capacity and a similar result was obtained for the degradation of Rhodamine B. [79]…”

Section: Effect Of Phsupporting

confidence: 75%

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

2021

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“…In the case of solid solutions (Bakiz et al, 2018; Hallaoui et al, 2016; Taoufyq et al, 2015), the chemical substitution allowed modifying the energies and intensities of photoluminescence emissions, acting as structural defects, mainly oxygen vacancies.Other authors have shown the role of charge separation or the polarization on photocatalytic activity and photoluminescence emissions (Chen, Huang, Guo, Zhang, & Ma, 2019; Chen et al, 2018; Hao et al, 2019; Huang et al, 2017). 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).…”

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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“…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%

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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Facile synthesis, characterization and photocatalytic performance of Zn3(PO4)2 platelets toward photodegradation of Rhodamine B dye

Cited by 77 publications

References 29 publications

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

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

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

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Facile synthesis, characterization and photocatalytic performance of Zn3(PO4)2 platelets toward photodegradation of Rhodamine B dye

Cited by 77 publications

References 29 publications

Synthesis of g‐C3N4, Zn3(PO4)2 and g‐C3N4/Zn3(PO4)2 Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

Synthesis of g‐C3N4, Zn3(PO4)2 and g‐C3N4/Zn3(PO4)2 Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

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

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

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Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

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

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