Investigation on the catalytic activity of aminosilane stabilized gold nanocatalysts towards the reduction of nitroaromatics

Viswanathan, Perumal; ., T. Bhuvaneswari; Ramaraj, Ramasamy

doi:10.1016/j.colsurfa.2017.05.040

Cited by 15 publications

(1 citation statement)

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“…[21][22][23]. MNPs are more effective as compared to their bulk catalyst, where the constituents of both nano and bulk are same with the only difference in the particle size, and are proved effective in many electron transfer reactions [24]. The only limitation of MNPs is their fast agglomerations which can be controlled or minimized through a solid matrixes.…”

Section: Introductionmentioning

confidence: 99%

Melia Azedarach impregnated Co and Ni zero-valent metal nanoparticles for organic pollutants degradation: validation of experiments through statistical analysis

Ahmad

Shah

Khattak

et al. 2020

J Mater Sci: Mater Electron

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The Melia Azedarach (MA) plant materials were used for the stabilization of Co (Co/MA) and Ni (Ni/MA) NPs prepared through simple chemical routes in an aqueous medium using NaBH 4 as a reducing agent. The prepared catalysts were extensively characterized through FTIR, XRD, FESEM, EDS, and TGA elemental analysis. These techniques suggest the presence of cellulose, hemicellulose, and lignin in the MA plant. Five modal pollutants methyl orange (MO), para-nitrophenol (PNP), Congo Red (CR), Rhodamine B (RB), and Methylene Blue (RB) were selected to assessed the catalytic activity of the synthesized catalysts. The Co/MA decolorized the MO and PNP in 4.5 and 12 min up to 81 and 93%, respectively, while the Ni/MA took 8 and 25 min in the decolorization of the same pollutants up to 95 and 89%, respectively. The k app values for PNP degradation of Co/MA are higher which was 2.1 × 10-1 compared to Ni/MA (4.9 × 10-2 min −1) confirming the highest catalyst activity of Co/MA. Similarly, we have observed the superior catalyst activity of Co/MA for all the selected pollutants and the highest rate constant found for MB dye was 2.2 × 10-1 min −1. The turnover frequency (TOF) found highest for Co/MA against PNP degradation which was 3.4 × 10-1 h −1 and lowest for Ni/MA against MO degradation (9.6 × 10-2 h −1), respectively. Furthermore, various statistical parameters indicated that all the experiments are highly significant.

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Section: Introductionmentioning

confidence: 99%

Melia Azedarach impregnated Co and Ni zero-valent metal nanoparticles for organic pollutants degradation: validation of experiments through statistical analysis

Ahmad

Shah

Khattak

et al. 2020

J Mater Sci: Mater Electron

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Synthesis of P‐Doped g‐C₃N₄/Cu₂O Nanocomposite and Investigation of Its Photocatalytic Characteristics in Reduction of Nitroaromatic Compounds to Corresponding Amines Under Visible Light

Sadat,

Moghanlou,

Rezvan

et al. 2025

Applied Organom Chemis

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In this research, as a new heterogenous nanocomposite, P‐doped g‐C3N4/Cu2O was successfully synthesized by simultaneous reduction of copper salts and the resultant precipitation. The phosphor was doped onto the graphitic carbon nitrite by the calcination method. The various spectroscopic and imaging methods (XPS, X‐ray diffraction [XRD], FTIR, Pl, BET, DRS, Map Scanning, EDS (EDAX), TEM, FESEM, and EIS) were devised to characterize the structural properties, morphology, and optical and photocatalytic activities of the synthesized nanocomposite. The synthesized nanocomposite was then used as photocatalysts in the reduction of nitroaromatic compounds to the corresponding amino aromatic species, with the results being highly promising. Indeed, the conversion of nitrobenzene to aniline was 100% accomplished within 30 min. In these reactions, hydrazine compounds were used as hydrogen suppliers. The proposed photocatalyst exhibits great recyclability and reusability so that no significant change in the catalytic activity of the nanocomposite and the resultant conversion efficiency was observed after six rounds of reuse.

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Catalytic Investigation of Ag Nanostructures Loaded on Porous Hematite Cubes: Infiltrated versus Exteriors

2019

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Ag Nanostructures (NSs) were successfully infiltrated on porous Hematite (α-Fe 2 O 3 ) Cubes and exteriorly deposited on Prussian blue (PB) Cubes to derive two different types (Infiltrated-Ag and Exterior/Ag) of metal loaded semiconductor composites. In the Infiltrated-Ag, Ag NSs were infiltrated through the pores of Hematite Cubes whereas; it was exteriorly deposited with Exterior/Ag catalyst. Both infiltrated and exteriorly deposited Ag NSs were carefully characterized by morphological and physiological characterization tools and the prepared catalysts were applied toward reduction reaction of p-nitrophenol (PNP) in the presence of NaBH 4 by UV-vis spectroscopy. It was found that "Infiltrated-Ag" exhibited bi-functional properties with specific surface area and high catalytic activity toward PNP reduction. Such catalytic activity of the "Infiltrated-Ag" might be attributed to the electron enriched Hematite/Ag interface and its efficient contribution to the electron transfer between Hematite/Ag and PNP.[a] Dr.

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Investigation on the catalytic activity of aminosilane stabilized gold nanocatalysts towards the reduction of nitroaromatics

Cited by 15 publications

References 58 publications

Melia Azedarach impregnated Co and Ni zero-valent metal nanoparticles for organic pollutants degradation: validation of experiments through statistical analysis

Melia Azedarach impregnated Co and Ni zero-valent metal nanoparticles for organic pollutants degradation: validation of experiments through statistical analysis

Synthesis of P‐Doped g‐C₃N₄/Cu₂O Nanocomposite and Investigation of Its Photocatalytic Characteristics in Reduction of Nitroaromatic Compounds to Corresponding Amines Under Visible Light

Catalytic Investigation of Ag Nanostructures Loaded on Porous Hematite Cubes: Infiltrated versus Exteriors

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Investigation on the catalytic activity of aminosilane stabilized gold nanocatalysts towards the reduction of nitroaromatics

Cited by 15 publications

References 58 publications

Melia Azedarach impregnated Co and Ni zero-valent metal nanoparticles for organic pollutants degradation: validation of experiments through statistical analysis

Melia Azedarach impregnated Co and Ni zero-valent metal nanoparticles for organic pollutants degradation: validation of experiments through statistical analysis

Synthesis of P‐Doped g‐C3N4/Cu2O Nanocomposite and Investigation of Its Photocatalytic Characteristics in Reduction of Nitroaromatic Compounds to Corresponding Amines Under Visible Light

Catalytic Investigation of Ag Nanostructures Loaded on Porous Hematite Cubes: Infiltrated versus Exteriors

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Synthesis of P‐Doped g‐C₃N₄/Cu₂O Nanocomposite and Investigation of Its Photocatalytic Characteristics in Reduction of Nitroaromatic Compounds to Corresponding Amines Under Visible Light