Homogeneous magnetic Ag-Au alloy microparticles for ultrasensitive catalytic reduction of aromatic nitro compounds

Zhu, Geng; Geng, Jian; Li, Yan; Yuan, Yong-Kun; Han, Guo‐Zhi

doi:10.1016/j.colsurfa.2019.123697

Cited by 13 publications

(5 citation statements)

References 36 publications

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“…Imine metal complexes are effective catalysts in either homogeneous or heterogeneous processes, and the overall catalytic efficiency depends on the type of imine, the coordinated active sites, and the metal ions used [7,8]. Recently, a number of homogeneous catalyst structures for the synthesis of amines by reduction of nitro groups have been reported [9,10]. Cu(II) complexes of the Schiff base ligands have great importance as active homogeneous catalysts in oxidation reactions, synthesis reactions, and in the reduction of organic compounds [11].…”

Section: Introductionmentioning

confidence: 99%

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

Abdel‐Rahman

Mohammed

Ahmed

et al. 2023

Sohag Journal of Sciences

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The conversion of nitro compounds to their corresponding amino compounds by reduction route is a significant chemical reaction from an industrial and environmental standpoint. In the present paper, copper Schiff base complex was successfully prepared from the reaction between (1, 1 -(pyridine-2,3-dimethyl imino methyl)naphthalene-2,2 -diol) and Cu(CH3COO)2 salt. This was successfully characterized with different techniques and grafted over graphene oxide (GO) as support after functionalizing it via chemical grafting using aminopropyltriethoxysilane (APTES) as a linker to obtain the functionalized form (FGO). The new heterogeneous complex (CuMGO) was depicted using physicochemical and spectroscopic tools such as FT-IR, UV-Vis, SEM, XRD, Raman spectroscopy, and XPS. The results manifest that Cu(II) imine complex was successfully immobilized on GO. The resulting catalyst was used to reduce 4-nitrophenol (4-NP) to its corresponding amine 4-aminophenol (4-AP) at room temperature in case of using hydrazine hydrate as a reducing agent. It showed good activity with a percent of conversion (44.4%) and an apparent rate constant of 2.06 × 10-3 min-1 in about 130 min. The prepared catalyst can be recycled five times without losing its activity.

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Section: Introductionmentioning

confidence: 99%

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

Abdel‐Rahman

Mohammed

Ahmed

et al. 2023

Sohag Journal of Sciences

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“…[6,7] Therefore, exploring appropriate auxiliary supporters with different shape, structure, and properties for noble metal nanoparticles has been one of the most effective and common strategies to improve the utilization efficiency of noble metals. [8][9][10][11][12][13][14][15][16][17][18][19] Currently, the noble microparticles have been acted as an efficient catalyst for a lot of organic reactions, especially towards the reduction of aromatic nitro compounds. [20] For improving the catalytic performance of noble microparticles, many efforts of scientists were devoted to seeking suitable supporters with certain auxiliary catalytic function.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Bifunctional Catalytic Performance of G‐C₃N₄@ Ag Composite by NaBH₄ Etching

Tang,

Zhao,

Han

2023

Part & Part Syst Charact

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Herein, a novel composite of g‐C3N4 and silver nanoparticles(g‐C3N4@Ag) with enhanced bifunctional catalytic activity through chemical etching is reported. A kind of g‐C3N4@Ag composite by one‐pot route, then treated the product with sodium borohydride (NaBH4) solution for a certain time is first synthesized. The property and morphology of the g‐C3N4@Ag composite changed greatly after the treatment. Compared with the pristine g‐C3N4@Ag composite, the NaBH4‐etching endowed g‐C3N4@Ag composite (RACN) with smoother two‐dimensional plane structure, as well as an extension of the conjugate system which originating from the stronger chemical connection between the Ag nanoparticles and g‐C3N4. Furthermore, research results indicated that the RACN showed superior broad‐spectrum catalytic performance for the reduction of aromatic nitro compounds, and the catalytic efficiency of the RACN is enhanced dozens of times by the treatment. Moreover, the photocatalytic activity of the RACN is also greatly improved. This discovery provides an efficient and facile method toward the enhancement of catalytic activity of semiconductor and metal nanoparticle composites by chemical etching.

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“…Magnetic nanocomposite materials are recognized as one of the most versatile and outstanding platforms for immobilization of AgNPs. Different magnetic nanocomposites have been successfully combined with AgNPs to generate effective and long-lasting catalysts with improved recyclability and stability. , For example, Yang et al synthesized a novel AgNP nanocomposite with an extremely high loading of AgNPs using Tannic acid/Fe 3+ functionalized magnetic graphene oxide nanocomposite . The AgNP magnetic nanocatalyst shows excellent stability and recyclability in an aqueous environment and can achieve an ultrahigh catalytic reduction rate to organic dyes and nitrophenol at an extremely low dosage.…”

Section: Introductionmentioning

confidence: 99%

Recyclable Mussel-Inspired Magnetic Nanocellulose@Polydopamine–Ag Nanocatalyst for Efficient Degradation of Refractory Organic Pollutants and Bacterial Disinfection

Wang

Yang

Huang

et al. 2022

ACS Appl. Mater. Interfaces

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Development of a novel strategy to tackle bacterialcontaminated complex industrial wastewaters containing refractory organic pollutants is of great demand. In this study, polydopamine (PDA)-coated magnetic cellulose nanofiber (MCNF)-loaded silver nanoparticle (AgNP) (MCNF/PDA−Ag) nanocomposites were designed and applied for efficient degradation of organic dye pollutants and inactivation of Escherichia coli (E. coli) in wastewater. In the presence of NaBH 4 , MCNF/PDA−Ag could achieve a high catalytic reduction rate of 6.54 min −1 for the removal of methylene blue. Similarly, it showed good catalytic reduction performance for methyl orange (0.63 min −1 ) and 4nitrophenol (2.94 min −1 ). The MCNF/PDA−Ag nanocomposites can be easily magnetically recycled and reused with negligible loss of catalytic performance. Moreover, this nanocatalyst also exhibited excellent disinfection performance against E. coli, with more than 99% disinfection ratio at very low doses (50 μg/mL). Overall, this work provides new insights into a delicate design of advanced magnetically recyclable silver nanocomposites with ultrahigh catalytic rates and excellent antibacterial properties from sustainable nature biomass.

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Homogeneous magnetic Ag-Au alloy microparticles for ultrasensitive catalytic reduction of aromatic nitro compounds

Cited by 13 publications

References 36 publications

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

Enhancement of Bifunctional Catalytic Performance of G‐C₃N₄@ Ag Composite by NaBH₄ Etching

Recyclable Mussel-Inspired Magnetic Nanocellulose@Polydopamine–Ag Nanocatalyst for Efficient Degradation of Refractory Organic Pollutants and Bacterial Disinfection

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Homogeneous magnetic Ag-Au alloy microparticles for ultrasensitive catalytic reduction of aromatic nitro compounds

Cited by 13 publications

References 36 publications

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

Enhancement of Bifunctional Catalytic Performance of G‐C3N4@ Ag Composite by NaBH4 Etching

Recyclable Mussel-Inspired Magnetic Nanocellulose@Polydopamine–Ag Nanocatalyst for Efficient Degradation of Refractory Organic Pollutants and Bacterial Disinfection

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Enhancement of Bifunctional Catalytic Performance of G‐C₃N₄@ Ag Composite by NaBH₄ Etching