Controlled and stepwise generation of Cu2O, Cu2O@Cu and Cu nanoparticles inside the transparent alumina films and their catalytic activity

Jana, Debrina; De, Goutam

doi:10.1039/c2ra21662k

Cited by 28 publications

(24 citation statements)

References 60 publications

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“…Thus, designing of efficient method for the successful degradation of CR is need of time. CR has been degraded by various methods such as chemical, biological, photocatalytic degradation, and catalytic reduction methods . Some of these methods are inefficient, costly, and produce toxic wastes which are difficult to dispose out .…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles Engineered Polystyrene‐Poly(N‐isopropylmethacrylamide‐acrylic acid) Core Shell Hybrid Polymer Microgels for Catalytic Reduction of Congo Red

Naseem

Farooqi

Begum

et al. 2018

Macro Chemistry & Physics

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Polystyrene‐poly(N‐isopropylmethacrylamide‐acrylic acid) [pSty‐p(NIpmam‐AC)] core shell microgels loaded with silver nanoparticles (NPs) as a recyclable catalyst for rapid reduction of Congo Red (CR) dye in aqueous medium is reported for the first time. Catalytic activity of Ag‐pSty‐p(NIpmam‐AC) core shell composite microgels is measured by adopting the reduction of CR as a benchmark reaction. Restriction of Ag NPs in single layered p(NIpmam‐AC) shell of Ag‐pSty‐p(NIpmam‐AC) core shell composite microgels enhances the diffusion of reactants to access the Ag NPs, surface during reaction with respect to previously reported core shell and homogenous composite microgels, and thus enhances the rate of CR reduction. The solid nonresponsive pSty core induces easy recyclability in core shell composite microgel catalysts. The effect of different reaction parameters such as amount of catalyst, concentration of NaBH4 and CR on the reaction completion time for CR reduction, as well as on the value of apparent rate constant (kapp), is also studied by keeping all other parameters constant, separately. Reduction efficiency of Ag‐pSty‐p(NIpmam‐AC) catalyst is also measured under different reaction conditions for the reduction of CR. A slight decrease in the percentage activity of Ag‐pSty‐p(NIpmam‐AC) catalyst is observed for up to four cycles for CR reduction. The reported Ag‐pSty‐p(NIpmam‐AC) composite microgel catalysts can be used to degrade other pollutants.

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Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles Engineered Polystyrene‐Poly(N‐isopropylmethacrylamide‐acrylic acid) Core Shell Hybrid Polymer Microgels for Catalytic Reduction of Congo Red

Naseem

Farooqi

Begum

et al. 2018

Macro Chemistry & Physics

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“…In recent years, the synthesis of specific structures of nanomaterials in materials science has been of great interest. Cu 2 Oi s ap -type semiconductor (which hasadirect band gap of about 2.17 eV) [1] that has received considerable attention recently because of its potential applicationsi nd ye degradation, [2] gas sensing,m agnetic devices,s olar energy conversion, [3,4] catalysis, [5] lithium ion batteries, [6] CO oxidation, [7] and photoactivated water splitting into H 2 and O 2 . [8] Cu 2 On anoparticles synthesized through bottom-up approaches are known to have different morphologies such as nanospheres, hollow spheres, wires, cubes, pyramids, octahedra, and squares.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound‐Assisted Preparation of Copper(I) Oxide Nanocubes: High Catalytic Activity in the Synthesis of Quinazolines

2017

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A facile and green ultrasound‐assisted synthesis of Cu2O nanocubes at room temperature is presented. The Cu2O nanocubes were characterized using XRD, SEM, TEM, energy‐dispersive X‐ray spectroscopy, UV/Vis spectroscopy, differential scanning calorimetry with thermogravimetric analysis, and FTIR spectroscopy. The Cu2O nanocubes were employed as a heterogeneous nanocatalyst and were found to be highly active in the preparation of quinazolines by the tandem cyclization of 2‐bromobenzaldehydes with amidines under ligand‐free conditions. Various quinazolines could be prepared in excellent yields within a very short reaction time. Furthermore, the Cu2O nanocatalyst could be recycled and reused up to four times without any significant loss of catalytic activity.

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“…Recently, reduction of dyes in presence of NaBH 4 is considered as an affordable, effective, environment friendly technology in removing such organic pollutants in solution . Moreover, it is reported that compared to parent dyes, its reductive products become inclined to biodegradation and mineralization, largely reducing the harm to the environment . Thus, there is a growing need for developing novel methods for the reduction of organic dyes …”

Section: Introductionmentioning

confidence: 99%

“…[38] Moreover, it is reported that compared to parent dyes, its reductive products become inclined to biodegradation and mineralization, largely reducing the harm to the environment. [39][40][41][42] Thus, there is a growing need for developing novel methods for the reduction of organic dyes. [37] Herein, hetero-nanostructured Ni/a-Mn 2 O 3 catalyst was synthesized via surfactant aided co-reduction method using CTAB (surfactant) as the stabilizer for the Ni nanoparticles and NaBH 4 as reducing agent.…”

Section: Introductionmentioning

confidence: 99%

Hetero–nanostructured Ni/α‐Mn₂O₃ as Highly Active Catalyst for Aqueous Phase Reduction Reactions

et al. 2016

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In this work, a simple strategy for the synthesis of hetero‐nanostructured Ni/α‐Mn2O3 via surfactant‐aided co‐reduction method is reported. The as synthesized Ni/α‐Mn2O3 is applied as catalytic material for the aqueous phase reduction of 4‐nitrophenol (4‐NP) and organic dye pollutants, namely Rhodamine B (RhB), Methylene blue (MB), Rose Bengal (RB), Congo red (CR), and Methyl orange (MO) in the presence of a mild reducing agent, NaBH4. This synthetic route provides homogeneous dispersion of Ni nanoparticles over α‐Mn2O3 surface. The nanoparticles and support are characterized using XRD, SEM/EDX, TEM, AAS and BET surface area analyses. The Ni particles are spherical, crystalline and size ranges < 5 nm. Further, hetero‐nanostructured Ni/α‐Mn2O3 is established as a highly efficient recyclable catalyst for the reduction of 4‐NP to 4‐aminophenol (4‐AP). The HPLC and FTIR analysis shows that 4‐AP is the sole product of the reduction of 4‐NP. The Ni/α‐Mn2O3 also exhibits high activity towards reduction of cationic and anionic dye pollutants. Thus, the as synthesized hetero‐nanostructured Ni/α‐Mn2O3 can be considered as the future contender for the wastewater treatment.

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Controlled and stepwise generation of Cu2O, Cu2O@Cu and Cu nanoparticles inside the transparent alumina films and their catalytic activity

Cited by 28 publications

References 60 publications

Silver Nanoparticles Engineered Polystyrene‐Poly(N‐isopropylmethacrylamide‐acrylic acid) Core Shell Hybrid Polymer Microgels for Catalytic Reduction of Congo Red

Silver Nanoparticles Engineered Polystyrene‐Poly(N‐isopropylmethacrylamide‐acrylic acid) Core Shell Hybrid Polymer Microgels for Catalytic Reduction of Congo Red

Ultrasound‐Assisted Preparation of Copper(I) Oxide Nanocubes: High Catalytic Activity in the Synthesis of Quinazolines

Hetero–nanostructured Ni/α‐Mn₂O₃ as Highly Active Catalyst for Aqueous Phase Reduction Reactions

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Controlled and stepwise generation of Cu2O, Cu2O@Cu and Cu nanoparticles inside the transparent alumina films and their catalytic activity

Cited by 28 publications

References 60 publications

Silver Nanoparticles Engineered Polystyrene‐Poly(N‐isopropylmethacrylamide‐acrylic acid) Core Shell Hybrid Polymer Microgels for Catalytic Reduction of Congo Red

Silver Nanoparticles Engineered Polystyrene‐Poly(N‐isopropylmethacrylamide‐acrylic acid) Core Shell Hybrid Polymer Microgels for Catalytic Reduction of Congo Red

Ultrasound‐Assisted Preparation of Copper(I) Oxide Nanocubes: High Catalytic Activity in the Synthesis of Quinazolines

Hetero–nanostructured Ni/α‐Mn2O3 as Highly Active Catalyst for Aqueous Phase Reduction Reactions

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Hetero–nanostructured Ni/α‐Mn₂O₃ as Highly Active Catalyst for Aqueous Phase Reduction Reactions