A novel microbial synthesis of catalytically active Ag–alginate biohydrogel and its antimicrobial activity

Otari, Sachin V.; Patil, Rahul; Waghmare, Shailesh R.; Ghosh, Sourja; Pawar, S.H.

doi:10.1039/c3dt51093j

Cited by 68 publications

(27 citation statements)

References 40 publications

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“…The catalytic reduction of 4-NP with Ag NPs involved the diffusion of BH 4 À and 4-NP from aqueous solution to the surface of the Ag NPs, and then electron transfer from BH 4 À to 4-NP mediated by Ag NPs [26]. In this process, the amine groups in 4-AP attached to the surface of Ag NPs, which can block the reactant (4-NP) from reaching the Ag NPs surface [1], thus causing the decrease in reaction rate (k). The possible mechanism of the reduction process is shown in Scheme 1.…”

Section: Heterogeneous Catalytic Activitymentioning

confidence: 99%

“…The reduction of 4-NP by NaBH 4 is a thermodynamically possible reaction and kinetically restricted process in the absence of catalyst [1,24,25]. The concentration of 4-NP in the reaction is proportional to its absorbance at 400 nm.…”

Section: Heterogeneous Catalytic Activitymentioning

confidence: 99%

“…developers, and corrosion inhibitors [1], so the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) plays an important role in industrial chemistry [2]. Various catalysts such as PteNi nanoparticles [3], Au nanoparticles [4], Ag nanoparticles [5] and Pd nanoparticles [6] have been used for the reduction reaction.…”

Section: -Aminophenol (4-ap) Is An Important Industrial Intermediatementioning

confidence: 99%

“…Also it is easier for the beads to be recycled after the reaction [1]. So in the study, the QCAg, QCRAg and QCORAg bionanocomposites were made into beads to study their catalytic activities.…”

Section: Heterogeneous Catalytic Activitymentioning

confidence: 99%

“…C and C 0 are the concentration of 4-NP at time t and 0, respectively. The borohydride concentration used for the entire study was 0.034 M, which is a large excess compared to that of 4-NP (C NaBH4 / C 4-nitrophenol ¼ 480), to consider the reaction as pseudo first order reaction so that the rate of reaction depend on the concentration of 4-NP [1]. The catalysis mechanism was the electron transfer from the donor BH 4 À ion to the acceptor nitro compounds through the mediation process of silver nanoparticles [26].…”

Section: Heterogeneous Catalytic Activitymentioning

confidence: 99%

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Effect of rectorite on the synthesis of Ag NP and its catalytic activity

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Section: Heterogeneous Catalytic Activitymentioning

confidence: 99%

Section: Heterogeneous Catalytic Activitymentioning

confidence: 99%

Section: -Aminophenol (4-ap) Is An Important Industrial Intermediatementioning

confidence: 99%

Section: Heterogeneous Catalytic Activitymentioning

confidence: 99%

Section: Heterogeneous Catalytic Activitymentioning

confidence: 99%

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Effect of rectorite on the synthesis of Ag NP and its catalytic activity

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et al. 2015

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Metallogels: Availability, Applicability, and Advanceability

et al. 2019

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amount of cross-linked solid. According to the nature of solvents, gels are categorized into hydrogel and organogel to indicate whether the solvent is water or organic solvent(s), respectively. As to the gelation driving forces, gels can be classified into physical gels in which intermolecular interactions are responsible for gel formation, and chemical gels in which the gel skeleton is cross-linked by covalent bonds.Incorporation of metal components (metal ions, metal-organic molecules, and metal nanoparticles) is an effective way to locally establish extra interactions among the building blocks and consequently trigger gel formation, [2][3][4] weaken [5] or enhance [6] gel strength, and modify gel morphology. [7,8] Moreover, addition of metal components is a straightforward way to integrate the specific properties of metals with the properties of organic matrix, therefore to tune properties like conductivity, [9] color, [10,11] rheological behavior, [12] adsorption, [13] emission, [14] photophysical properties, [15] magnetism, [16,17] antibacterial activities, [18,19] catalytic activities, [20][21][22][23] redox activities, [24,25] and selfhealing properties. [26][27][28] Therefore, a broad response range to physical and chemical stimuli can be achieved. For instance, the incorporation of multivalence ions such as Fe 2+ /Fe 3+ , [25,29] Co 2+ / Co 3+ , [30] Cu + /Cu 2+ , [31] results in redox reactive hydrogels; the incorporation of magnetic nanoparticles like Fe 3 O 4[17] causes the gel to respond to external magnetic fields. In addition to the abovementioned intrinsically functional superiorities, metallogels can also serve as ideal templates to generate new materials, [13,22,23,32,33] such as 3D networks, [34] porous structures, [35] chiral materials, [36][37][38] quantum dots, [39] and nanorods. [40] Following the rapid advancement of exploration on the knowledge acquisition toward the major roles that metallogels are playing in catalysis, sensing, biomedicine, electronics, and optical devices, the focus of research has been transferred to the design principles of metallogels in the last decade. Owing to the advancements in the instrumental characterizations and theoretical calculations, [41] a number of pioneering efforts on metallogel design have been made and several innovative reviews have summarized these inspiring contributions. [32,[42][43][44] Despite their extensively acknowledged application advantages in many fields, the discovery of new metallogels with expected functionalities is still highly dependent on experimental screening and serendipity. The challenge stems from the susceptible balance among those complicated intermolecular interactions and the elaborate structure requirements of metallogels.Another research niche that needs to be clarified before discussing recent development of metallogels is: how to sort Introducing metal components into gel matrices provides an effective strategy to develop soft materials with advantageous properties such as: optical activity, conductivity, magn...

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Luminescent Silver–Purine Double Helicate: Synthesis, Self‐Assembly and Antibacterial Action

et al. 2016

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How would you describe your research? We have designed al uminescent silver-purine helical coordination complex and studied its antibacterial activity against both Gram-positive and Gram-negative bacteria. The MIC values indicate that the complex exhibits significantly better activity against Gram-negative bacteria, especially against E. coli.L uminescent properties of this complex were used to study its bacterial cell uptake with the help of fluorescence and scanning electron microscopy methods. This study suggests that silver-purine double helical complexes could be used as potential antibacterial agents.

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A novel microbial synthesis of catalytically active Ag–alginate biohydrogel and its antimicrobial activity

Cited by 68 publications

References 40 publications

Effect of rectorite on the synthesis of Ag NP and its catalytic activity

Effect of rectorite on the synthesis of Ag NP and its catalytic activity

Metallogels: Availability, Applicability, and Advanceability

Luminescent Silver–Purine Double Helicate: Synthesis, Self‐Assembly and Antibacterial Action

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