Novel magnetically separable of Fe3O4/Ag3PO4@WO3 nanocomposites for enhanced photocatalytic and antibacterial activity against Staphylococcus aureus (S. aureus)

Abstract

Background Iron oxide nanocomposites have received a great attention for their application in various fields like physics, medicine, biology, and material science etc., due to their unique properties, such as magnetism, electrical properties, small size, biocompatibility and low toxicity. Methods Fe 3 O 4 /Ag 3 PO 4 @WO 3 nanocomposites with different weight percent of Ag 3 PO 4 were successfully prepared through fabricated Ag 3 PO 4 /Fe 3 O 4 with WO 3 via in situ fabrication method, electrospinning involved precursor solution preparation and spinning to enhance photocatalyst performance under simulated sunlight for the degradation of methylene blue (MB) and antibacterial activity against Staphylococcus aureus ( S. aureus ). Results The photocatalytic degradation of methylene blue (MB) under simulated light irradiation indicated that the nanocomposite with 0.25 mg of Ag 3 PO 4 has the best activity. An additional advantage of these photocatalysts is magnetic recoverability, using external magnetic field and photocatalytic stability of the nanocomposites was evaluated for three cycles. In addition, using different scavengers, holes (h + ) and superoxide radical (O 2 ·−) radicals and hydroxide radical ( · OH) were identified the main oxidative species in the degradation reaction of methylene blue. Conclusions The results reveal that Fe 3 O 4 /Ag 3 PO 4 @WO 3 -0.25 nanocomposites have photocatalytic and antibacterial activity against S. aureus. The photocatalyst and mechanism based on the enhancement of electron transfer processes between Ag 3 PO 4 and WO 3 nanoparticles.

Facile Synthesis of CeO2/CoWO4 Hybrid Nanocomposites for High Photocatalytic Performance and Investigation of Antimicrobial Activity

“…After 90 min, over 99% of both microbial species suited nonviable, and the degradation of the attained active biofilms was perceived. 64 The mechanism for the bactericidal motion of NPs appearances substantial efficacy for the responsive/reactive oxygen species (ROS) and its bactericidal strains actual part in its metallic NPs and their complexes in the existence of oxygen species and accordingly 65 donate to the superior mechanical damage for the utilities of microbes, and enhanced bactericidal effects of hybrid CoWO 4 /CeO 2 nanostructured materials. Moreover, the greater 1.…”

Facile Synthesis of CeO2 Blended CoWO4 Nanocomposites For High Photocatalytic Performance And Investigation of Their Antimicrobial Activity

“…Moreover, the united CoWO4/CeO2was obviouslyindicated that the NCs collectedround the surface membranes, which mightrespond with the microbial membranes and produced internalization of the NCs in the microbe's cells (Magdalane et al 2016). The mechanism for the bactericidal motion of NPs appearancessubstantialefficacy for the responsive/reactive oxygen species (ROS) and its bactericidalstrains actualpart in its metallic NPs and their complexesin the existenceof oxygen species and accordingly (Gasmalla et al 2019), donate to the superior mechanical damage for the utilities of microbes, and enriched bactericidal influence of unifiedCoWO4/CeO2nanostructured materials.Moreover, thegreaterattentiveness of all these managed NCs materials are destructive to together the consumers and microorganisms, but still, nano-level attention of these NMs are further applications for the destruction of microbes (Sundaram et al 2017).…”

The Antibacterial Effects of Supermolecular Nano-Carriers by Combination of Silver and Photodynamic Therapy

“…The metallic nanoparticles, especially the silver (Ag) nanoparticles have been demonstrated to be effective antibacterial agents with broad antibacterial activity (Agarwal et al, 2010;Mahmoudi and Serpooshan, 2012;Neibert et al, 2012;Durmus and Webster, 2013;Mei et al, 2013;Shah et al, 2013;Agnihotri et al, 2015;Borrelli et al, 2015;Lim et al, 2015;Kyaw et al, 2017;Ximing et al, 2017;Kim et al, 2018;Liu et al, 2018Liu et al, , 2019Gasmalla et al, 2019;Zhang et al, 2019Zhang et al, , 2020He et al, 2020;Horue et al, 2020;Tong et al, 2020). Silver nanoparticles can increase the permeability of bacterial membrane and cell wall and, penetrate into the cytoplasm.…”

“…In addition, the methotrexate (MTX) is also included in the nano-carrier to treat the inflammatory reaction associated with bacterial infection (Lebugle et al, 2002;Alam et al, 2017;Yang et al, 2017;Duan and Li, 2018;Trujillo-Nolasco et al, 2019;Sun et al, 2020). To address the aforementioned issues of bare silver nanoparticles, different nano-carriers have been constructed, such as metalorganic frameworks (MOFs) (Ximing et al, 2017;Zhang et al, 2019Zhang et al, , 2020, hybrid metallic nanoparticles (Mahmoudi and Serpooshan, 2012;Durmus and Webster, 2013;Mei et al, 2013;Shah et al, 2013;Agnihotri et al, 2015;Lim et al, 2015;Kyaw et al, 2017;Kim et al, 2018;Liu et al, 2018;Gasmalla et al, 2019;He et al, 2020;Tong et al, 2020) and mesoporous nanoparticles (Liu et al, 2019). However, the above nano-carriers have some drawbacks, for instance, the low drug loading capacity (<10%) (Cai et al, 2015) and the complexity of designing a multicomponent nano-carrier (containing at least the carrier and two or more compounds).…”