Zn-doped SiO2 nanoparticles preparation and characterization under the effect of various solvents: Antibacterial, antifungal and photocatlytic performance evaluation

In view of enhanced bioactivity and photocatalytic applications, the doped material has gained much attention and present study was focused on the preparation of Zn doped WO 3 (Zn-d-WO 3 ) via precipitation method. The prepared Zn-d-WO 3 was characterized by Scanning Electron Microscopy (SEM), x-ray diffraction (XRD), Energy-dispersive x-ray (EDX). The effect of Zn concentration was studied on antibacterial, antifungal and photocatalytic activities along with structural and morphological variation. The Zn-d-WO 3 was triclinic, spherical and rod shaped and particle size was decreased as the Zn concentration increased. The antimicrobial activity of Zn-d-WO 3 was evaluated against a panel of bacterial strains (Escherichia coli, Pasturellamu ltocida, Bacillus subtilis, Staphylococcus aureus) and fungal strain (Aspergillus niger, Aspergillus flavus, Penicillium notatum). The Zn-d-WO 3 showed promising antibacterial activity with minimum inhibitory concentration (MIC) values in the range of 211-387 (μg ml −1 ), whereas the antifungal activity was less than the standard (Fluconazole), which revealed that the Zn-d-WO 3 are highly active against bacterial strains since activity was comparable with standard drug (Rifampicin). The photocatalytic activity (PCA) was evaluated by degrading methylene blue (MB) dye in an aqueous solution and dye degradation of 78% and 92% was achieved in 120 min under visible and UV irradiation, respectively. Results revealed that the Zn-d-WO 3 could possibly be used as photocatalyst for the degradation of dyes in wastewater.

Section: Antimicrobial Activitysupporting

confidence: 90%

Section: Characterizationsupporting

confidence: 59%

Section: Npsmentioning

confidence: 99%

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Synthesis and characterization of Zn doped WO₃ nanoparticles: photocatalytic, antifungal and antibacterial activities evaluation

Arshad¹,

Ehtisham-ul-Haque

Bilal

et al. 2020

“…For reduction process, e − and H 2 are produced and reduced the targeted species. For oxidative degradation of dye, · OH radicals are required and under oxic conditions, Fe generates H 2 O 2 , which resultantly gererates · OH radicals, which destruct the organic pollutant oxidative in aqeous media [24][25][26][27]. The coagulation took place through iron oxides/hydroxides.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of zero valent iron and photocatalytic application for the degradation of dyes

Bhatti

Iram

Iqbal

et al. 2020

Self Cite

In the present investigation, Zero valent iron (ZVI) was synthesized using ferrous sulfate and borohydrate in the presence of EDTA and characterized by x-ray Diffraction (XRD), Energydispersive x-ray (EDX) and Scanning electron microscope (SEM) techniques. The prepared ZVI catalytic activity was evaluated by degrading Acid Red 1 (AR1) and Acid Green 25 (AG25) dyes. The process variables such as pH, initial dye concentration, ZVI dose, contact time, hydrogen peroxide (H 2 O 2 ) and temperature were optimized for maximum dye degradation. AG25 removal was 98% at pH 4, ZVI dose 0.2 g l −1 , initial dye concentration 50 mg l −1 , 90 min reaction time and 8 mM H 2 O 2 concentration, whereas pH 2, ZVI dose 0.1 g l −1 , 50 mg l −1 initial dye concentration, 8 mM H 2 O 2 and 90 min were found to be optimum for AR1 maximum degradation of 91.60%. Behnajady-Modirshahla-Ghanbery kinetic model and thermodynamic study revealed the spontaneity and endothermic nature of the process. Results revealed that ZVI has potential to degrade the dyes and could possibly be used for the degradation of dyes in wastewater.

“…As-synthesized 3D Zinc vanadate nanoflower was characterized by XRD, SEM, AFM, EDX, Particle size and UV-vis techniques. Moreover, PCA was evaluated for the degradation of cetirizine hydrochloride (C-HCl) using RSM under CCD [35,36].…”

Section: Introductionmentioning

confidence: 99%

Microwave assisted synthesis of zinc vanadate nanoparticles and photocatalytic application

Iqbal

Fatima

Javed³

et al. 2020

In recent years, the nanotechnology has gained much attention since the nanoparticles (NPs) have applications in every field of life. The hetero-structured are of special interest due to their higher photocatalytic activity. In present investigation, Zinc vanadate NPs were synthesized from vanadium and zinc salts by microwave assisted precipitation method. The Zinc vanadate NPs were characterized by x-ray Powder Diffraction (XRD), Energy-dispersive x-ray spectroscopy (EDX), Scanning electron microscope (SEM) and UV-visible techniques. The photocatalytic activity (PCA) was evaluated by degrading the methylene blue (MB) dye and process variables were optimized. The Zinc vanadate size was <100 nm and particles were in aggregates form. The MB dye degradation was performed at different conditions of process variables and it was observed that MB dye was significantly degraded using Zinc vanadate NPs under UV light irradiation. The reaction time, catalyst dose and dye initial concentration showed variable effect on dye degradation. Based on results, it can be concluded that the microwave irradiation is viable for the synthesis of Zinc vanadate NPs for photocatalytic activity. In view of promising efficiency of Zinc vanadate NPs, it can be used for the dye degradation and for the remediation of textile effluents.