Highly efficient catalytic/sonocatalytic reduction of 4-nitrophenol and antibacterial activity through a bifunctional Ag/ZnO nanohybrid material prepared <i>via</i> a sodium alginate method

Oualid, Hicham Abou; Amadine, Othmane; Essamlali, Younes; Kadmiri, Issam Meftah; Arroussi, Hicham El; Zahouily, Mohamed

doi:10.1039/c9na00075e

Cited by 37 publications

(17 citation statements)

References 65 publications

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“…These spectral changes correspond to the formation of the reaction product ( p‐ NA) and the consumption of the reactive (DNB), respectively. Furthermore, a clear isosbestic point is observed at λ=300 nm indicating the absence of intermediates and/or product decomposition [26–28] . The complete conversion of DNB to p‐ NA catalyzed by 2 and 3 occurs around 30 min while when it is catalyzed by 1 the conversion occurs around 90 min; these results are favorable since other types of MNP as catalysts may take longer.…”

Section: Resultsmentioning

confidence: 94%

New Insights into the Catalytic Activity and Reusability of Water‐Soluble Silver Nanoparticles

et al. 2021

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Silver nanoparticles (AgNPs) ‐stabilized by different sulfonated imidazolium salts (Lx)‐ have been synthesized as potential recyclable and reusable catalysts for the reduction of nitroaromatic compounds in water. An exhaustive study of the catalytic activity is presented and kinetic data are explained in terms of the Langmuir–Hinshelwood model. The kinetic parameters and the performance of AgNP as catalysts were determined. The results reveal that catalysis is a superficial process and the reaction rate depends on the type of AgNP:Lx used as catalyst, with the imidazolium salts having the effects on the catalytic activity. The physicochemical and structural characteristics of AgNPs are factors that influence the catalytic efficiency. The fact that these catalysts are recycled, in some cases for more than 6 cycles, opens a way for their recovery and reuse of AgNPs. Finally, a comparative study with gold nanoparticles (AuNP) stabilized by the same salts has been realized.

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Section: Resultsmentioning

confidence: 94%

New Insights into the Catalytic Activity and Reusability of Water‐Soluble Silver Nanoparticles

et al. 2021

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“…It was reported that bacterial growth could be inhibited by specific disruption mechanisms present between composites and the surface of the bacteria (generation of H 2 O 2 , reorientation and rearrangement of the surface of the bacteria) . Moreover, the bacterial activity of composites also depends on particle size, particle surface chemistry, stability, and concentration in the growth medium, which is inversely proportional to the size and concentration of the particles …”

Section: Resultsmentioning

confidence: 99%

“…Electrical, optical, chemical and magnetic properties of these materials strongly exist in many application domains, including medicine, packaging, optical machine and electronic devices . Among these composites, there are noble metal/metal oxides such as Ag/ZnO, Ag/TiO 2 , Au/ZnO, Au/CuO, and metal oxides/metal oxides such as ZnO/TiO 2 , ZnO/CuO, NiO/CuO, La 2 O 3 /ZnO . composites are usually synthesized using many routine methods comprising sol‐gel, solvothermal, precipitation, gelation using biopolymers .…”

Section: Introductionmentioning

confidence: 99%

“…Among these composites, there are noble metal/metal oxides such as Ag/ZnO, Ag/TiO 2 , Au/ZnO, Au/CuO, and metal oxides/metal oxides such as ZnO/TiO 2 , ZnO/CuO, NiO/CuO, La 2 O 3 /ZnO . composites are usually synthesized using many routine methods comprising sol‐gel, solvothermal, precipitation, gelation using biopolymers . The modification of metal oxide nanoparticles by doping with metallic nanoparticles gives a possibility to improve the properties of materials by changing the surface.…”

Section: Introductionmentioning

confidence: 99%

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Nd‐Doping‐Induced Enhancement in the Antibacterial Activity of Synthesized ZnO Heretostructures

et al. 2020

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Highly metal oxide heterostructures are well known for their high effectiveness toward the growth of many pathogens. ZnO oxide was widely studied for this purpose; however, the doping effect on its antibacterial properties is still not satisfactory. In this context, the present work aimed to prepare a series of mesoporous ZnO doped with different neodymium (Nd) loading using a ball‐milling method and examine their antibacterial activities against gram‐positive and gram‐negative pathogens. All as‐synthesized materials were characterized by X‐ray diffraction (XRD), scanning electronic microscope coupled with elemental mapping (SEM‐EDS), infrared spectroscopy (IR) and nitrogen adsorption‐desorption analysis (BET). The results exhibited a successful formation of mesoporous Nd‐doped ZnO composites with a homogeneous distribution of Nd on the surface of ZnO. Antibacterial behavior of Nd‐doped ZnO composites was performed against gram‐positive and gram‐negative bacteria strains: Methicillin‐resistant Staphylococcus aureus (SARM) P637, Enterobacter aerogenes P1260and Klebsiella oxytoca BU9399. Antibacterial activities results proved the bacteriostatic properties of prepared Nd‐ZnO composites. In particular, a strong potency against Klebsiella oxytoca BU9399 was recorded with MIC and MBC values of 2 and 2.67 mg/mL, respectively. Therefore, the present work recommends an important kind of material that could be used as a protective antibiofilm coating formed by human pathogenic bacteria. Nd‐doped ZnO composites were found to be a good candidate for antimicrobial application and possible antioxidant and anti‐imflammatory evaluation in biomedical sector.

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“…Ag/ZnO nanoparticles were also reported for photoreduction and antibacterial activities. 24 Whereas, Jeyachitra et al 25 have reported the synthesis of Ni and Ag codoped ZnO NPs for dye degradation applications. Azfar et al 26 have also reported the synthesis of Ni and Ag codoped ZnO NPs by using the sol–gel method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ni–Ag–ZnO solid solution nanoparticles for photoreduction and antimicrobial applications

et al. 2022

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Highly efficient catalytic/sonocatalytic reduction of 4-nitrophenol and antibacterial activity through a bifunctional Ag/ZnO nanohybrid material prepared via a sodium alginate method

Abstract: In this work, a bifunctional nanohybrid silver/zinc oxide material (Ag/ZnO) has been synthesized by a rapid route using sodium alginate simultaneously as a sacrificial template and silver reducing agent.

Cited by 37 publications

References 65 publications

New Insights into the Catalytic Activity and Reusability of Water‐Soluble Silver Nanoparticles

New Insights into the Catalytic Activity and Reusability of Water‐Soluble Silver Nanoparticles

Nd‐Doping‐Induced Enhancement in the Antibacterial Activity of Synthesized ZnO Heretostructures

Synthesis of Ni–Ag–ZnO solid solution nanoparticles for photoreduction and antimicrobial applications

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