Photodegradation of tartrazine dye favored by natural sunlight on pure and (Ce, Ag) co-doped ZnO catalysts

Bouarroudj, Tayeb; Aoudjit, Lamine; Lerari, Djahida; Zaidi, B.; Ouraghi, Maâmar; Zioui, Djamila; Mahidine, Sarah; Shekhar, Chander; Bachari, K.

doi:10.2166/wst.2021.106

Cited by 48 publications

(10 citation statements)

References 72 publications

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“…When an excess amount of C 3 N 5 -LDH-Ag was added (more than 0.25 g/L), the percentage of degradation decreased because the photocatalyst suspension could notably inhibit the penetration of visible light into the solution, which leads to a decrease in the generation of oxidizing agents. Consequently, 0.25 g/L catalyst dose was chosen as the optimum dose for further experiments (Bouarroudj et al 2021).…”

Section: Effect Of Catalyst Dosagementioning

confidence: 99%

Highly effectual photocatalytic degradation of tartrazine by using Ag nanoparticles decorated on Zn-Cu-Cr layered double hydroxide@ 2D graphitic carbon nitride (C3N5)

Akbarzadeh¹,

Khazani

Khaloo

et al. 2022

Environ Sci Pollut Res

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Pollution of water resources is one of the main concerns of many countries. This issue originates from the entry of diverse pollutants, including dye compounds, into water sources. In this work, ternary Zn-Cu-Cr layered double hydroxides (LDH) supported on graphitic carbon nitride (g-C 3 N 5 ) decorated by silver nanoparticles (C 3 N 5 -LDH-Ag) was rst prepared. Application of various characterization techniques such as SEM, XRD, and FT-IR revealed that the synthesized nanocomposite was composed of Zn-Cu-Cr LDH nanoparticles, g-C 3 N 4 nanosheets, and Ag nanoparticles. The prepared nanomaterials were employed for the photodegradation of tartrazine in aqueous solutions. It was found that the C 3 N 5 -LDH-Ag catalyst outperformed their pure g-C 3 N 5 , Zn-Cu-Cr LDH, and C 3 N 5 -LDH composite in photocatalytic degradation of tartrazine under visible light irradiation. Tartrazine (20 mg/L) can be entirely removed by 0.25 g/L C 3 N 5 -LDH-Ag photocatalyst under one h visible light irradiation (200W) at pH 6 with a rapid degradation rate constant (k) that is 4.4, 3.9, and 2.6 times higher than that of pure C 3 N 5 , Zn-Cu-Cr LDH, and C 3 N 5 -LDH component, respectively. The formation of hydroxyl radicals on the surface of C 3 N 5 -LDH-Ag as the main active species was approved by the capturing experiment. The nding results approved the stability and reusability of C 3 N 5 -LDH-Ag in four photocatalytic degradation cycles. In general, our ndings revealed that the synthesized nanocomposite could be employed as an e cient photocatalyst in environmental remediation.

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Section: Effect Of Catalyst Dosagementioning

confidence: 99%

Highly effectual photocatalytic degradation of tartrazine by using Ag nanoparticles decorated on Zn-Cu-Cr layered double hydroxide@ 2D graphitic carbon nitride (C3N5)

Akbarzadeh¹,

Khazani

Khaloo

et al. 2022

Environ Sci Pollut Res

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“…The mechanism of P4R sorption (13) and photodegradation (14–26) process can be described as follow [ 6,48–52 ] :

C_{20} H_{11} N_{2} {Na}_{3} O_{10} S_{3} + {Zn}_{3} Al {[{((), OH)}_{6}]}^{+ 3} {true({NO}_{3} true)}^{-} \times {9H}_{2} O_{chemisorb .} \to {Zn}_{3} Al {[{((), OH)}_{6}]}^{+ 3} \times C_{20} H_{11} N_{2} O_{10} {normalS}_{3}^{3 -} \times {9H}_{2} normalO

ZnAl goodbreak- LDH ((), with and without PVA) goodbreak+ hν \to ZnAl goodbreak- LDH ((), {normale}_{CB}^{-} goodbreak+ {normalh}_{VB}^{+})

{normalH}_{2} O + {normalh}^{+} \to \cdot OH + {normalH}^{+}

{2H}_{2} O + 2 {normalh}^{+} \to {normalH}_{2} {normalO}_{2} + {2H}^{+}

H_{2} O_{2} + hν \to 2 \cdot OH

…”

Section: Resultsmentioning

confidence: 99%

“…The acceleration of decomposition is also explained by the fact that the released polar molecules absorb light and emit it into a nearby catalyst. The mechanism of P4R sorption (13) and photodegradation (14-26) process can be described as follow [6,[48][49][50][51][52] :…”

Section: The Kinetics Of Photocatalytic Degradationmentioning

confidence: 99%

Photocatalytic degradation of Ponceau 4R by ZnAl‐layered double hydroxide nanostructures obtained with and without polyvinyl alcohol

Balayeva

2022

J Chinese Chemical Soc

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In this work, zinc-aluminum layered double hydroxides were synthesized with and without the presence of polyvinyl alcohol by co-formation and co-precipitation methods, respectively. The photocatalytic activity of the obtained nanocomposites was studied and a comparative analysis was performed. The mechanism of photocatalytic decomposition of Ponceau 4R (P4R) on the nanocomposites has been explained in detail by relating it to the compositional and structural properties of the nanocomposite. The structural and optical properties of nanocomposites are characterized by XRD, UV-vis, PL, and SEM in a pure state, dye loaded and after photodegradation. The bandgap of nanocomposites (E g = 3,23 eV) was reduced after sorption (E g = 3,1 eV) and photocatalytic degradation (E g = 2,87 eV) of P4R. This result is in good agreement with basal spacing determined by XRD. To study the sunlight degradation of P4R at different initial concentrations (8,12,16,20,30,40, 50 mg L À1 ), firstly sorption was developed with Langmuir and other isothermal models. The Langmuir constant value (K L = 0,102) of ZnAl-LDH/PVA is close to the Langmuir-Hinshelwood constant (K L-H = 0,094) obtained from the kinetics of the photodegradation in sunlight. The photocatalytic degradation of P4R onto the obtained nanocomposites follows the Langmuir-Hinshelwood kinetic model.

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“…36 Because of their abundance in consumer products, all three dyes have been widely used as representative species in the eld of dyes and pigments and wastewater treatment. [37][38][39][40][41] The scope of this work is to characterize the loss of ozone from the gas phase when passing over thin lms of dyes. There are no previous studies of the multi-phase chemistry of ozone with azo dyes on surfaces, so the experiments were designed to determine whether there is potential for multiphase ozonolysis of azo dyes in the indoor environment.…”

Section: Introductionmentioning

confidence: 99%

Reactive uptake of ozone to azo dyes in a coated-wall flow tube

Al-Mashala¹,

Boone²,

Schnitzler³

2022

Environ. Sci.: Processes Impacts

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Photodegradation of tartrazine dye favored by natural sunlight on pure and (Ce, Ag) co-doped ZnO catalysts

Cited by 48 publications

References 72 publications

Highly effectual photocatalytic degradation of tartrazine by using Ag nanoparticles decorated on Zn-Cu-Cr layered double hydroxide@ 2D graphitic carbon nitride (C3N5)

Highly effectual photocatalytic degradation of tartrazine by using Ag nanoparticles decorated on Zn-Cu-Cr layered double hydroxide@ 2D graphitic carbon nitride (C3N5)

Photocatalytic degradation of Ponceau 4R by ZnAl‐layered double hydroxide nanostructures obtained with and without polyvinyl alcohol

Reactive uptake of ozone to azo dyes in a coated-wall flow tube

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