Layered double hydroxides decorated with Au-Pd nanoparticles to photodegradate Orange II from water

Sobhana, Liji; Sarakha, Mohamed; Prevot, Vanessa; Fardim, Pedro

doi:10.1016/j.clay.2016.06.019

Cited by 39 publications

(15 citation statements)

References 56 publications

(41 reference statements)

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“…The absorption bands at 1620 cm À1 are associated with the C]O of the carboxylate groups. The occurrence of the feeble band at 1631 and 1643 cm À1 can be ascribed to the bending frequency and OdH asymmetric stretching vibration of the water molecules, respectively [40,41]. The characteristic absorption band of ZnO samples was observed at 595 cm À1 , which is related to the metal-oxygen stretching vibration.…”

Section: Ftir Analysismentioning

confidence: 93%

LDH Ternary Nanocomposites: g-C₃N₄ Intercalated ZnO\Mg-Al for Superior Photocatalytic Activity towards Dye Degradation

Bhuvaneswari¹,

Pazhanivel²,

Palanisamy³

et al. 2020

Assorted Dimensional Reconfigurable Materials

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Photocatalytic dye degradation has received more attention as an affordable and effective way to treat the dye polluted water. In the present chapter, we are going to discuss; (i) the preparation and photophysical characterization of g-C 3 N 4 intercalated ZnO\Mg-Al LDH, a novel ternary nanocomposite, and (ii) its visible light photocatalytic degradation activity against the methylene blue dye. LDHs are 2D materials composed of "brucite-like" cationic layers where an inclusion of trivalent cations presents an overall positive charge to the nanosheets. g-C 3 N 4 is one of the organic semiconductor photocatalyst which active for several types of reactions such as CO 2 reduction, water splitting, and degradation because of its stable, nontoxic, and earth-abundant nature. Mainly, the development of numerous 2D g-C 3 N 4 nanosheets has been extensively used in the field of photocatalyst. By the combination heterojunction with 2D/2D interface can effectively improve the photocatalytic activity. The nitrogen-rich g-C 3 N 4 intercalated ZnO\Mg-Al LDH ternary nanocomposite formation could follow the direct dye degradation process and results enhance the visible light absorption. The enhanced photocatalytic activity is mainly due to the improved charge separation rate and high number of photogenerated electrons. The large number of photogenerated electrons and high charge separation efficiency are effectively influence the dye degradation efficiency.

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Section: Ftir Analysismentioning

confidence: 93%

LDH Ternary Nanocomposites: g-C₃N₄ Intercalated ZnO\Mg-Al for Superior Photocatalytic Activity towards Dye Degradation

Bhuvaneswari¹,

Pazhanivel²,

Palanisamy³

et al. 2020

Assorted Dimensional Reconfigurable Materials

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“…CaAl LDH materials were provided in a one‐ pot reaction by the co‐precipitation method . Calcium nitrate tetrahydrate (Ca (NO 3 ) 2 4H 2 O) and aluminum nitrate nonahydrate (Al (NO 3 ) 3 .·9H 2 O) with molar ratio (2:1) dissolved in deionized water (DI).…”

Section: Methodsmentioning

confidence: 99%

“…For example, Mg/Al layered double hydroxide supported‐Bi 2 O 3 modified by Pd (II) was prepared and used for the degradation of methylene blue (MB) under the visible‐light irradiation . In another research, MgZnAl‐Cl layered double hydroxides were prepared by co‐precipitation method, further used as support to immobilize gold–palladium (Au‐Pd) bimetallic nanoparticles by colloidal sol immobilization method and applied for photocatalytic degradation of orange II (OII) dye …”

Section: Introductionmentioning

confidence: 99%

Enhancement of azo dyes removal efficiency by using LDH/Tris/Pd catalyst: Kinetic studies

Sarmast

Ghorbani‐Vaghei

Merati

2019

Applied Organom Chemis

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LDH/Tris/Pd (CaAl-layered double hydroxide/tris (hydroxymethyl) aminomethane/palladium) was synthesized and appraised for its catalytic activity towards the degradation of two selected azo dyes. The decolorization of azo dyes, acid red 18 (AR 18) and reactive yellow 15 (RY 15), requires considerably small amounts of synthesized catalyst. Kinetic studies show that the catalytic decolorization of these azo dyes follows the first order kinetic model.The reported method is simple and applicable; in addition, the stable catalyst can efficiently decolorize model azo dyes with good recyclability. Therefore, LDH/Tris/Pd can be accepted as the possible component for the utilization in wastewater treatment.

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“…Particular gold nanoparticles in titanium have been used as photocatalysts in the degradation of dyes [14,15], phenol, and phenolic compounds [2,12,13,16]. In this sense, Dozzi et al [17] show that the presence of gold in TiO 2 facilitates the mineralization of formic acid, whose degradation comes mainly from the direct interaction with the holes of the photoproduced valence band.…”

Section: Introductionmentioning

confidence: 99%

Removal of Nonylphenol Polyethylene Glycol (NPEG) with Au-TiO2 Catalysts: Kinetic and Initial Transformation Path

et al. 2020

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The purpose of this study was to evaluate the efficiency of the Au-TiO2 catalyst in the degradation of nonylphenol polyethylene glycol (NPEG). In the first part of the study, the catalyst was synthesized and characterized. Initially, the catalyst (TiO2 Degussa P-25) was doped with gold precursor salts (HAuCl4) at different concentrations (5, 10, and 15%) and the photodeposition method with UV light. It was determined by diffuse reflectance (DF) and scanning electron microscopy (SEM) that the photodeposition method was effective for the inclusion of gold particles on the surface. The catalyst band gap showed a reduction to 2.9 e.v (compared to TiO2 Degussa P-25), and it was observed that the gold-doped catalyst showed absorption in the visible light range 500 to 600 nm. The percentage of deposited gold was determined by energy dispersive spectroscopy (EDS). In the second part of the study, various NPEG degradation experiments were performed; with the catalyst that showed the best conversion percentages of NPEG, the experimental data were analyzed using UV-Vis spectrophotometry and TOC (total organic carbon). With these results, a carbon-based mass balance and reaction kinetics were generated using the Langmuir–Hinshelwood (L–H) heterogeneous catalysis model. For the estimation of the kinetic constants, the non-linear regression of the Levenger–Marquardt algorithm was used. With these results, kinetic models of the degradation of the molecule and the generation and consumption of organic intermediate products (OIPs) were generated.

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Layered double hydroxides decorated with Au-Pd nanoparticles to photodegradate Orange II from water

Cited by 39 publications

References 56 publications

LDH Ternary Nanocomposites: g-C₃N₄ Intercalated ZnO\Mg-Al for Superior Photocatalytic Activity towards Dye Degradation

LDH Ternary Nanocomposites: g-C₃N₄ Intercalated ZnO\Mg-Al for Superior Photocatalytic Activity towards Dye Degradation

Enhancement of azo dyes removal efficiency by using LDH/Tris/Pd catalyst: Kinetic studies

Removal of Nonylphenol Polyethylene Glycol (NPEG) with Au-TiO2 Catalysts: Kinetic and Initial Transformation Path

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Layered double hydroxides decorated with Au-Pd nanoparticles to photodegradate Orange II from water

Cited by 39 publications

References 56 publications

LDH Ternary Nanocomposites: g-C3N4 Intercalated ZnO\Mg-Al for Superior Photocatalytic Activity towards Dye Degradation

LDH Ternary Nanocomposites: g-C3N4 Intercalated ZnO\Mg-Al for Superior Photocatalytic Activity towards Dye Degradation

Enhancement of azo dyes removal efficiency by using LDH/Tris/Pd catalyst: Kinetic studies

Removal of Nonylphenol Polyethylene Glycol (NPEG) with Au-TiO2 Catalysts: Kinetic and Initial Transformation Path

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LDH Ternary Nanocomposites: g-C₃N₄ Intercalated ZnO\Mg-Al for Superior Photocatalytic Activity towards Dye Degradation

LDH Ternary Nanocomposites: g-C₃N₄ Intercalated ZnO\Mg-Al for Superior Photocatalytic Activity towards Dye Degradation