Catalytic reduction of 4-nitrophenol and photo inhibition of Pseudomonas aeruginosa using gold nanoparticles as photocatalyst

Khan, Shafiullah; Wang, Runguo; Tahir, Kamran; Zhang, Jichuan; Zhang, Liqun

doi:10.1016/j.jphotobiol.2017.04.006

Cited by 24 publications

(12 citation statements)

References 19 publications

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“…It has been reported that AuNPs exhibit strong catalytic activity for the complete hydrogenation of toxic nitrophenolic compounds to unharmful substances of respective aminophenols [24,25]. Among them, 4-nitrophenol (4-NP) discharged mainly from fertilizer production, petrochemical, and dye-related manufacturing activities is considered a dangerous organic pollutant in industrial wastewater [26].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of Gold Nanoparticles Using Litsea cubeba Fruit Extract for Catalytic Reduction of 4-Nitrophenol

Doan

Thieu

Nguyen

et al. 2020

Journal of Nanomaterials

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This work describes a simple single-step method for green synthesis of colloidal gold nanoparticles (AuNPs) using Litsea cubeba (LC) fruit extract as a reducing as well as stabilizing agent simultaneously. Major parameters affecting the formation of LC-AuNPs, including gold ion concentration, reaction time, and reaction temperature were optimized using ultraviolet-visible (UV-Vis) measurements at a characteristic maximum absorbance of 535 nm. The functional groups responsible for reducing gold ions and capping AuNPs were examined by Fourier-transform infrared (FTIR) spectroscopy. Powder X-ray diffraction (XRD) analysis revealed the crystalline nature of AuNPs. Transmission electron microscopy (TEM) measurements showed that the biosynthesized LC-AuNPs were mostly spherical with an average size of 8-18 nm. The nanoparticles also demonstrated excellent ultrarapid catalytic activity for the complete reduction of 4-nitrophenol to p-aminophenol in the presence of NaBH4 within 10 min with a reaction rate constant of 0.348 min-1.

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Section: Introductionmentioning

confidence: 99%

Biosynthesis of Gold Nanoparticles Using Litsea cubeba Fruit Extract for Catalytic Reduction of 4-Nitrophenol

Doan

Thieu

Nguyen

et al. 2020

Journal of Nanomaterials

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“…Reduction of p -NP follows a Langmuir–Hinshelwood mechanism statistics, in which both the molecules, that is, p -NP and NaBH 4 , adsorb onto the catalyst surface before undergoing the bimolecular reaction . Even though the reaction between p -NP and NaBH 4 is thermodynamically favorable with E 0 = ∼0.76 V, it does not occur by itself because of the similar negatively charged p -nitrophenolate and BH 4 – ions that have a strong tendency to repel each other . Therefore, positively charged catalysts are used as a mediator for pacing the reaction between the two similarly charged entities.…”

Section: Resultsmentioning

confidence: 99%

NiMn-Layered Double Hydroxide Porous Nanoarchitectures as a Bifunctional Material for Accelerated p-Nitrophenol Reduction and Freestanding Supercapacitor Electrodes

Sharma

Aman

Omar

2022

ACS Appl. Nano Mater.

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The prolonged reactions for phase and morphology stabilization remain an issue in layered double hydroxides (LDHs), for example, NiMn LDH. The present work proposes a rational strategy for tuning the interfacial surface chemistry in the NiMn LDH phase to obtain grassy-mat-like porous nanoarchitectures. The approach gifts a morphology possessing a high specific surface area available for the ions’ adsorption and desorption, thereby enhancing the extent of reversible reactions. The porous nanoarchitecture displays excellent catalytic activity by reducing p-nitrophenol in just ∼300 s with a rate constant of 0.231 min–1 at a 2 mg mL–1 concentration. Alongside, as a freestanding binder-free supercapacitor electrode, the material delivers a high specific capacitance of ∼568 F g–1 at 1 mA cm–2, which is highest among all NiMn LDH variants prepared at different reaction times. The fabricated symmetric supercapacitor exhibits an excellent energy and a power density of ∼22 W h kg–1 at 1 mA cm–2 and ∼6429 W kg–1 at 10 mA cm–2, respectively. The device retains ∼83% capacitance, at 10 mA cm–2, after 5000 charge–discharge cycles. To the best of our knowledge, this is the first report where NiMn LDH is optimized in a shorter duration and proposed as a competitive bifunctional material for heterogeneous catalysis and supercapacitors.

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“…WL, 73 Citrus maxima (fruit), 74 fungus Mariannaea sp. HJ, 75 longan polysaccharides, 76 aspartame, 77 Jujube polysaccharides, 78 Mimosa pudica flower, 79 Mimusops elengi (bark), 80 Cotoneaster horizontalis leaves, 81 catechin-capped, 82 Konjac glucomannan , 83 caffeic acid, 84 Coffea arabica seed, 20 Hedysarum polysaccharides, 87 and Sterculia acuminata (fruit) 68 as precursors to obtain AuNPs (as an unsupported catalyst) for the reduction of 4-NP. The AuNPs obtained by green synthesis used to reduce 4-NP and their respective characteristics and reaction conditions are presented in Table 1.…”

Section: Reduction Of 4-nitrophenol Using Green-synthesized Metal Nan...mentioning

confidence: 99%

Reduction of 4-nitrophenol using green-fabricated metal nanoparticles

Mejía

Bogireddy

2022

RSC Adv.

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Catalytic reduction of 4-nitrophenol and photo inhibition of Pseudomonas aeruginosa using gold nanoparticles as photocatalyst

Cited by 24 publications

References 19 publications

Biosynthesis of Gold Nanoparticles Using Litsea cubeba Fruit Extract for Catalytic Reduction of 4-Nitrophenol

Biosynthesis of Gold Nanoparticles Using Litsea cubeba Fruit Extract for Catalytic Reduction of 4-Nitrophenol

NiMn-Layered Double Hydroxide Porous Nanoarchitectures as a Bifunctional Material for Accelerated p-Nitrophenol Reduction and Freestanding Supercapacitor Electrodes

Reduction of 4-nitrophenol using green-fabricated metal nanoparticles

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