Magnetically recoverable Au doped iron oxide nanoparticles coated with graphene oxide for catalytic reduction of 4-nitrophenol

Rawat, Jyoti; Bijalwan, Kriti; Negi, Charu; Sharma, Himani; Dwivedi, Charu

doi:10.1016/j.matpr.2021.01.349

Cited by 6 publications

(6 citation statements)

References 15 publications

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“…Following that, 4-NP is synthesized by creating and removing one water molecule by hydroxyl dehydration. Finally, 4-AP is produced (Aditya et al 2017 ; Kong et al 2017 ; Elfiad et al 2018 ; Baye et al 2020 ; Rawat et al 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Biogenic synthesis of silver anchored ZnO nanorods as nano catalyst for organic transformation reactions and dye degradation

et al. 2022

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In this study, we are reporting biogenic synthesis of silver nanoparticles and hydrothermal synthesis of zinc oxide nanoparticles. Using convenient mechanical milling methods, nanocomposites with superior photocatalytic and catalytic properties are synthesized. Herein, we have adopted a green, eco-friendly, and economical route for the synthesis of Ag nanoparticles using Zingiber officinalae rhizome extract in an aqueous solution. The synthesized materials were characterized using UV–Vis spectroscopy, XRD, SEM & FE-SEM, FT-IR, Raman, and a particle size analyzer with zeta potential analysis. The photocatalytic activities of Ag, ZnO and their composites were studied by observing the degradation of methylene blue and crystal violet dyes under natural sunlight. Then the catalytic efficacies of synthesized nanoparticles for various organic transformation reactions were studied. Ag–ZnO nanocomposites were predicted to have improved photocatalytic activity and organic transformation reactions, allowing them to be used in environmental remediation applications.

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Section: Resultsmentioning

confidence: 99%

Biogenic synthesis of silver anchored ZnO nanorods as nano catalyst for organic transformation reactions and dye degradation

et al. 2022

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“…The reduction reaction takes two steps: the rst is the adsorption of a hydrogen atom, and the second is the removal of a water molecule. A strong repulsive force is present between BH 4 − and 4-NP, which makes the reduction process di cult [50]. Because of the repulsion between the BH 4 − and 4-NP, the solution of NaBH 4 and 4-NP is stable [51].…”

Section: Mechanism Of 4-nitrophenol Reductionmentioning

confidence: 99%

Biologically and Catalytically Active Cubic Silver Chloride- anchored Palladium/Gold Bimetallic Nanomaterials

Sarvalkar,

Vadanagekar,

Karvekar

et al. 2023

Preprint

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In this study, we present the first biogenic production of cubic AgCl anchor (Pd and Au) bimetallic (AgCl@Pd/Au) nanoparticles (NPs) with metabolic waste from the Bos Taurus Indicus (BTI) species. The biological components in BTI urine are proposed to serve as reducing agents in the straightforward reduction synthesis of Pd and Au bimetallic NPs. AgCl@Pd/Au bimetallic alloy NPs are characterized as synthesized materials through XRD, FT-IR, SEM/FE-SEM, TEM, XPS, particle size with zeta potential, and other techniques. The XRD data was refined, revealing the synthesized substance to be composed of AgCl, Pd, and Au. AgCl@Pd/Au bimetallic alloy NPs have been studied for their catalytic activity against toxic dyes and nitroarenes in the presence of NaBH4. Newly synthesized AgCl@Pd/Au bimetallic alloy NPs are also studied for their antibacterial and antioxidant characteristics; results reveal strong antimicrobial and moderate antioxidant activity. This study presents a novel method for the large-scale synthesis of nanomaterials and nanocomposites with tailor-made morphologies and compositions: the use of BTI urine as a reducing agent.

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“…The nitroaromatics such as 4-NP, 4-NA, and 1-B-4-NB are organic pollutants found in industrial e uents which contaminate the groundwater and cause harm to both humans and aquatic life (Hung et al 2016;Basavegowda et al 2017;Mondal et al 2017;Cui et al 2020). Aromatic amines obtained from the reduction of nitroaromatics are not only less toxic than nitroaromatics but also act as important intermediates in the synthesis of dyes, drugs, pigments, herbicides, and polymers (Veisi et al 2019;Rawat et al 2021). Recently, Thekkathu and co-workers reported a magnetically recoverable Iridium nanocatalyst supported on a silica shell for nitrophenols reduction (Thekkathu et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Sustainable magnetically recoverable Iridium-coated Fe3O4 nanoparticles for enhanced catalytic reduction of organic pollutants in water

Diksha

Kaur

Yempally

et al. 2023

Environ Sci Pollut Res

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In the present study, modi ed Fe 3 O 4 nanoparticles were fabricated by surface coating with tryptophan and Iridium by coprecipitation method to afford Fe 3 O 4 @trp@Ir magnetic nanoparticles. As-prepared Fe 3 O 4 @trp@Ir nanoparticles are environmentally benign e cient catalysts for reducing organic pollutants such as 4-nitrophenol (4-NP), 4-nitroaniline (4-NA), and 1-bromo-4-nitrobenzene (1-B-4-NB). The key parameters that affect the catalytic activity like temperature, catalyst loading, and the concentration of reducing agent NaBH 4 were optimized. The obtained results proved that Fe 3 O 4 @trp@Ir is an e cient catalyst for reducing nitroaromatics at ambient temperature with a minimal catalyst loading of 0.0025%. The complete conversion of 4-nitrophenol to 4-aminophenol took only 20 seconds with a minimal catalyst loading of 0.0025% and a rate constant of 0.0522 s − 1 . The high catalytic activity factor (1.040 s − 1 mg − 1 ) and high turnover frequency (9 min − 1 ) obtained for Fe 3 O 4 @trp@Ir nanocatalyst highlight the possible synergistic effect of the two metals (Fe and Ir). The visible-light photocatalytic degradation of 4-NP was also investigated in the presence of Fe 3 O 4 @trp@Ir. The photocatalytic degradation of 4-NP by Fe 3 O 4 @trp@Ir is completed in 20 min with 95.15% e ciency, and the rate of photodegradation of 4-NP (0.1507 min − 1 ) is about twice the degradation rate of 4-NP in the dark (0.0755 min − 1 ). The catalyst was recycled and reused for ve cycles without signi cant reduction in the conversion e ciency of the catalyst.

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Magnetically recoverable Au doped iron oxide nanoparticles coated with graphene oxide for catalytic reduction of 4-nitrophenol

Cited by 6 publications

References 15 publications

Biogenic synthesis of silver anchored ZnO nanorods as nano catalyst for organic transformation reactions and dye degradation

Biogenic synthesis of silver anchored ZnO nanorods as nano catalyst for organic transformation reactions and dye degradation

Biologically and Catalytically Active Cubic Silver Chloride- anchored Palladium/Gold Bimetallic Nanomaterials

Sustainable magnetically recoverable Iridium-coated Fe3O4 nanoparticles for enhanced catalytic reduction of organic pollutants in water

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