Copper(II) oxide nanoparticles coated cellulose sponge—an effective heterogeneous catalyst for the reduction of toxic organic dyes

Nagarajan, Durgadevi; Venkatanarasimhan, Swarnalatha

doi:10.1007/s11356-019-05419-0

Cited by 49 publications

(18 citation statements)

References 51 publications

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“…Effect of temperature and pH on the synthesis of AgNPs was investigated by varying the the temperature (15-40 °C) and pH (3)(4)(5)(6)(7)(8)(9). To obtained the desired pH value of fungal extract NaOH and HCl was used prior to the addition of silver nitrate.…”

Section: Optimization Of Physio-chemical Parameters For Agnps Synthesismentioning

confidence: 99%

“…Synthesis of nanoparticles has gained attention due to their applications in multiple fields such as antifungal agents, antibacterial agents, biosensor, bioremediation, anticancer, drug delivery, etc. [3][4][5][6][7][8][9][10]. In addition to this, unique properties of nanoparticles such as size, shape, surface to volume ratio, high catalytic activity, etc.…”

Section: Introductionmentioning

confidence: 99%

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Extracellular synthesis of silver nanoparticles using entomopathogenic fungus: characterization and antibacterial potential

Tyagi¹,

Tyagi²,

Gola³

et al. 2019

SN Appl. Sci.

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Present study involves the simple, rapid, non-toxic and in vitro method of extracellular silver nanoparticles synthesis using Entomopathogenic fungus (Beauveria bassiana). The development of silver nanoparticle in fungal supernatant was confirmed by the absorbance peak at 450 nm in UV-Vis spectrophotometer. Further, presence of AgNPs and its crystal lattice was confirmed by EDS and XRD, respectively. TEM micrograph confirmed the presence of differently shaped (triangular, circular, hexagonal) nanoparticles with size ranging from 10 to 50 nm. Variable shape and size of fungal assisted AgNps was also confirmed in SEM study. The optimal pH and temperature for biosynthesis of nanoparticles was found to be 6.0 and 25 °C, respectively. The continuous effects of AgNPs against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus in time dependent manner was confirmed in growth kinetic studies. During 36 h of growth study, maximum reduction in O.D 560 was found in E. coli (67.2%) followed by P. aeruginosa (63.3%) and S. aureus (56.8%) at 30 °C. The MIC values of fungal assisted AgNPs against E. coli, P. aeruginosa and S. aureus was found to be 2.5, 3 and 4.5 ppm, respectively. The MIC values of Ciprofloxacin was observed to be 0.5, 0.5 and 0.7 ppm, whereas MICs of AgNPs + Ciprofloxacin showed 0.4, 0.4, 0.5 ppm against E. coli, P. aeruginosa and S. aureus, respectively, clearly highlighting the synergistic effect of AgNPs in combination with Ciprofloxacin. In the view of challenges for developing antimicrobial nanoparticles of variable shape and size by various other methods, tuning nanoparticles synthesis via fungi can be a wonderful approach to resolve existing hurdles.

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Section: Optimization Of Physio-chemical Parameters For Agnps Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extracellular synthesis of silver nanoparticles using entomopathogenic fungus: characterization and antibacterial potential

Tyagi¹,

Tyagi²,

Gola³

et al. 2019

SN Appl. Sci.

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“…With the increasing growth of industrialization and the global economy, the serious impact of water pollution on the ecosystem and human health has caused great concern. , Among different types of water pollution, organic chemical contaminants, including water insoluble oils/organics − and water-soluble dyes/nitrophenols, − have posed tremendous threats to water bodies and are detrimental to human health. In addition, polluted water is often contaminated by versatile pathogens that are harmful to humans because they can spread multiple communicable diseases.…”

Section: Introductionmentioning

confidence: 99%

Mussel-Inspired Ag NPs Immobilized on Melamine Sponge for Reduction of 4-Nitrophenol, Antibacterial Applications and Its Superhydrophobic Derivative for Oil–Water Separation

Chen

Liu

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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A functional material integrated with a variety of functions is highly desired in wastewater treatment. In this research, a mussel-inspired method of immobilizing silver nanoparticles on the skeleton of a melamine sponge is proposed and applied for water remediation. Ag NPs were reduced in situ and grown on a polydopamine-modified melamine sponge. The catalytic reduction of 4-nitrophenol (4-NP) in the presence of the obtained MS-PDA-Ag was evaluated, and the results demonstrated that the MS-PDA-Ag presented high catalytic reduction activity. In addition, the monolithic MS-PDA-Ag presents excellent reusability with no remarkable decrease in catalytic efficiency after multiple reuses. Owing to the immobilized Ag NPs, the MS-PDA-Ag can also effectively inhibit the growth of bacteria against both gram-positive and gram-negative species, making it possible for bacteria elimination in polluted water. To further explore the possibility of utilizing the MS-PDA-Ag for versatile applications, a superhydrophobic derivative (S-MS-PDA-Ag) was prepared by coating a low-surface-energy substance (octadecanethiol) on the surface of MS-PDA-Ag. The obtained S-MS-PDA-Ag presents the capacities of oil/organics adsorption and water repellence, which can separate the insoluble oil/organics from water. The melamine sponge immobilized with Ag NPs demonstrates prominent catalytic reduction of 4-NP, antibacterial activity and the superhydrophobic derivative presents the capacity of insoluble oil/organics separation from oil–water mixtures, exhibiting high potential in the remediation of polluted water.

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“…Activated carbon, biochar, zeolite, synthetic polymers, and biopolymers supporting metal oxide nanoparticles are modern and effective composite materials that offer properties and application opportunities not exhibited separately by the individual components–high molecular weight host materials or inorganic nanoparticles alone [ 1 , 2 , 3 , 4 , 5 , 6 ]. The composite materials display more advantageous properties than raw supporting materials, allowing the effective removal of troublesome organic contaminants, such as antibiotics, dyes, and pesticides, and also toxic metallic and nonmetallic substances from aqueous media [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Copper Rich Composite Materials Based on Carboxylic Cation Exchangers and Their Thermal Transformation

et al. 2021

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The effect of a cupric deposit (Cu2+, CuO) on the thermal decomposition of carboxylic cation exchangers (CCEs) is not known, and such studies may have practical significance. CCEs have a very high ion exchange capacity, so an exceptionally large amount of CuO (which is a catalyst) can be precipitated inside them. Two CCEs, macroreticular (Amberlite IRC50) and gel-like (Amberlite IRC86), served as a polymeric support to obtain copper-rich hybrid ion exchangers. Composites with CuO particles inside a polyacrylic matrix (up to 35.0 wt% Cu) were obtained. Thermal analyses under air and under N2 were performed for CCEs in the H+ and Cu2+ form with and without a CuO deposit. The results of sixteen experiments are discussed based on the TG/DTG curves and XRD patterns of the solid residues. Under air, the cupric deposit shifted the particular transformations and the ultimate polymeric matter decomposition (combustion) toward lower temperatures (even about 100–150 °C). Under N2, the reduction of the cupric deposit to metallic copper took place. Unique composite materials enriched in carbonaceous matter were obtained, as the products of polymeric matrix decomposition (free radicals and hydrogen) created an additional amount of carbon char due to the utilization of a certain amount of hydrogen to reduce Cu (II) to Cu0.

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Copper(II) oxide nanoparticles coated cellulose sponge—an effective heterogeneous catalyst for the reduction of toxic organic dyes

Cited by 49 publications

References 51 publications

Extracellular synthesis of silver nanoparticles using entomopathogenic fungus: characterization and antibacterial potential

Extracellular synthesis of silver nanoparticles using entomopathogenic fungus: characterization and antibacterial potential

Mussel-Inspired Ag NPs Immobilized on Melamine Sponge for Reduction of 4-Nitrophenol, Antibacterial Applications and Its Superhydrophobic Derivative for Oil–Water Separation

Copper Rich Composite Materials Based on Carboxylic Cation Exchangers and Their Thermal Transformation

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