A highly efficient and multifunctional biomass supporting Ag, Ni, and Cu nanoparticles through wetness impregnation for environmental remediation

Khan, Shahid Ali; Ismail, Muhammad; Anwar, Yasir; Farooq, Aliya; Johny, Bassam Oudh Al; Akhtar, Kalsoom; Shah, Zafar Ali; Nadeem, Muhammad; Raza, Mian Ahmad; Asiri, Abdullah M.; Khan, Sher Bahadar

doi:10.1515/gps-2018-0101

Cited by 29 publications

(9 citation statements)

References 39 publications

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“…Figure depicts the diffraction patterns of Ni/GP and Cu/GP catalysts. The XRD pattern of Ni/GP displayed a diffraction peak at 2 θ = 48.8° corresponding to characteristic Braggs peak of (200) . In the XRD pattern of Cu/GP, two distinct diffraction peaks for Cu were observed at 2 θ values of 43.42° and 50.62° representing Bragg reflections of [111] and [200] planes of face‐centred cubic crystal structures of Cu nanoparticles .…”

Section: Resultsmentioning

confidence: 99%

Plant‐supported silver nanoparticles: Efficient, economically viable and easily recoverable catalyst for the reduction of organic pollutants

Ismail

Khan

et al. 2019

Applied Organom Chemis

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Ginger rhizome powder was used for the synthesis of supported metallic nanoparticle catalysts. A simple and novel adsorption method was used for the synthesis of silver nanoparticles loaded on ginger powder (Ag/GP), copper on ginger powder (Cu/GP) and nickel on ginger powder (Ni/GP). Among these, Ag/GP showed selective reduction of methyl orange and was used for further reactions. The prepared nanomaterials were characterized through X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy. The prepared Ag/GP catalyst was employed in the catalytic reduction of 4-nitrophenol (4-NP), 2-nitrophenol (2-NP), rhodamine B, methyl red and congo red. Ag/GP showed excellent catalytic reduction activity, the rate constants being 1.26 × 10 −3 and 2.38 × 10 −3 s −1 for 2-NP and 4-NP, respectively.The turnover frequency reached 1.06 min −1 for 2-NP and 1.16 min −1 for 4-NP when using the Ag/GP catalyst. The prepared Ag/GP catalyst demonstrated outstanding activity for the degradation of a mixed solution of dyes. Also, stability and reusability of the prepared catalyst were investigated, which showed outstanding reusability up to five times and was stable up to five days. KEYWORDS dye reduction, green synthesis, pseudo first-order kinetic, reusability and stability of catalyst, turnover frequency

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Section: Resultsmentioning

confidence: 99%

Plant‐supported silver nanoparticles: Efficient, economically viable and easily recoverable catalyst for the reduction of organic pollutants

Ismail

Khan

et al. 2019

Applied Organom Chemis

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“…Since the reaction occurs on the surface, increasing the area enhances the rate of degradation. The new peak formation at 252 nm with increasing intensity is considered from the hydrazine derivatives compound of MO [66,67]. Equation 2 was used to calculate the percent reduction of MO from their UV-Vis spectra:…”

Section: Discussionmentioning

confidence: 99%

Characterizations and analysis of the antioxidant, antimicrobial, and dye reduction ability of green synthesized silver nanoparticles

Riaz

Ismail

Ahmad

et al. 2020

Green Processing and Synthesis

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The current study was conducted to assess the potential of ginger rhizome extract (Zingiber officinale) for the synthesis of silver nanoparticles (AgNPs) through the green method and its mitigating activity against pathogenic bacterial strains. AgNPs were synthesized through a simple one-step approach and characterized by UV-Visible (UV-Vis) spectroscopy, powder X-ray diffraction (PXRD), transmission electronic microscopy (TEM), and energy dispersive X-rays spectroscopy (EDS). PXRD and TEM results of AgNPs showed the face central cubic structures and predominantly spherical structures with a size of 6.5 nm. EDS analysis confirms the elemental silver in nanoparticles. Moreover, the impact of the pH, as well as temperature, during the synthesis of AgNPs has also been investigated. At 25°C and pH 5, there was no significant peak for AgNPs in the absorption spectra. However, with an increase in temperature from 25°C to 85°C and pH 5 to pH 11, particles started attaining the spherical shape of different sizes due to an increase in the reduction rate. The AgNPs displayed effective results against selected pathogenic strains, Pseudomonas aeruginosa (MTCC 424), Methicillin-resistant Staphylococcus aureus (ATCC 43300), and fungus Candida albicans (KACC 30003). The prepared AgNPs exhibited excellent antioxidant activity and catalytic reduction of methyl orange with the pseudo-first-order rate constant of 3.9 × 10−3.

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“…25 The thermodynamic instability of MNPs is because of their high surface energy, high surface area, and active sites, therefore reducing the reactive and adsorption sites that further reduce the interfacial contact area of the NPs and the sample. 25,31,32 Designing and synthesis of materials with varied physiochemical features, required for various applications, have been carried out.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of Various Zero-Valent Metal Nanoparticles on a Superabsorbent Polymer for the Removal of Dyes, Nitrophenol, and Pathogenic Bacteria

Ali

Khan

2020

ACS Omega

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In this work, a superabsorbent polymer, sodium polyacrylate, also known as water ball (WB), loaded with Ni, Cu, and Ag zero-valent metal nanoparticles (MNPs) was applied for environmental remediation. WBs loaded with Ni, Cu, and Ag NPs were evaluated for their catalytic performance against the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) and decolorization of methyl orange (MO), Congo red (CR), and methylene blue (MB) dyes. The apparent rate constants (K app) for the reduction of 4-NP to 4-AP in the presence of Ni, Cu, and Ag NPs were 2.1 × 10–1, 2.9 × 10–1, and 4.6 × 10–1 min–1, respectively, indicating the strongest activity of WB loaded with Ag NPs as compared to the other two catalysts. Similarly, WB loaded with Ag NPs showed the highest K app values compared to the other two catalysts. Among all of the bacteria studied, except Providencia stuartii and Streptococcus mutans, the zone of inhibition of Ag was higher as compared to that of the Ni and Cu NPs, however, slightly low from that of the reference standard tetracycline TE30. Furthermore, the synthesized catalysts were extensively characterized through X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM), and X-ray photoelectron spectroscopy (XPS) analyses.

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A highly efficient and multifunctional biomass supporting Ag, Ni, and Cu nanoparticles through wetness impregnation for environmental remediation

Cited by 29 publications

References 39 publications

Plant‐supported silver nanoparticles: Efficient, economically viable and easily recoverable catalyst for the reduction of organic pollutants

Plant‐supported silver nanoparticles: Efficient, economically viable and easily recoverable catalyst for the reduction of organic pollutants

Characterizations and analysis of the antioxidant, antimicrobial, and dye reduction ability of green synthesized silver nanoparticles

Stabilization of Various Zero-Valent Metal Nanoparticles on a Superabsorbent Polymer for the Removal of Dyes, Nitrophenol, and Pathogenic Bacteria

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