Superficial visible-light-responsive Pt@ZnO nanorods photocatalysts for effective remediation of ciprofloxacin in water

Alahmadi, Nadiyah; Amin, M. S.; Mohamed, Reda M.

doi:10.1007/s11051-020-04968-7

Cited by 17 publications

(4 citation statements)

References 63 publications

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“…Figure 6 c shows a distinct peak realized at 532.84 eV, which could be correlated to O1s. This observation endorses the presence of an oxide lattice phase within the hybrid nanocomposite [ 44 , 45 , 46 ].…”

Section: Resultssupporting

confidence: 63%

Impact of Ag/ZnO Reinforcements on the Anticancer and Biological Performances of CA@Ag/ZnO Nanocomposite Materials

Alahmadi

Hussein

2023

Molecules

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In this study, an unpretentious, non-toxic, and cost-effective dissolution casting method was utilized to synthesize a group of anticancer and biologically active hybrid nanocomposite materials containing biopolymer cellulose acetate. Pristine ZnO and Ag(0.01, 0.05, 0.1)/ZnO hybrid nanofillers based on variable Ag NP loadings were prepared via green procedures in the presence of gum arabic (GA). The chemical structures and the morphological features of the designed nanocomposite materials were investigated by PXRD, TEM, SEM, FTIR, TGA, and XPS characterization techniques. The characterization techniques confirmed the formation of CA@Ag(0.01, 0.05, 0.1)/ZnO hybrid nanocomposite materials with an average crystallite size of 15 nm. All investigated materials showed two degradation steps. The thermal stability of the fabricated samples was ranked in the following order: CA/ZnO < CA@Ag(0.01)/ZnO < CA@Ag(0.05)/ZnO = CA@Ag(0.1)/ZnO. Hence, the higher Ag doping level slightly enhanced the thermal stability. The developed nanocomposites were tested against six pathogens and were used as the target material to reduce the number of cancer cells. The presence of Ag NPs had a positive impact on the biological and the anticancer activities of the CA-reinforced Ag/ZnO composite materials. The CA@Ag(0.1)/ZnO hybrid nanocomposite membrane had the highest antimicrobial activity in comparison to the other fabricated materials. Furthermore, the developed CA@Ag(0.1)/ZnO hybrid nanocomposite material effectively induced cell death in breast cancer.

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Section: Resultssupporting

confidence: 63%

Impact of Ag/ZnO Reinforcements on the Anticancer and Biological Performances of CA@Ag/ZnO Nanocomposite Materials

Alahmadi

Hussein

2023

Molecules

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“…In terms of efficiency, the results of table 2 showed that although the carnation-like Ag-ZnO was synthesized by a simple precipitation method, it had larger DE than Au-ZnO nanorods and nanoparticles [39, 65, 71, 72], Ag-ZnO nanorods [67], and Pd-ZnO flowers [69]. However, its DE was still lower than that of Pt-ZnO nanorods and nanoparticles [66,68], Pd-ZnO nanofiber membrane [70],…”

Section: Comparison Of the Performance Of Ag-zno Compositementioning

confidence: 99%

Preparation of carnation-like Ag-ZnO composites for enhanced photocatalysis under visible light

Mac

Nguyen

et al. 2023

Nanotechnology

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Carnation-like ZnO was synthesized by the facile precipitation method (at room temperature and in 120 min) to decompose dyes in an aqueous medium. The carnation-like ZnO had a stratified porous structure with a size of about 2-3 μm, its petals had a smooth surface with a thickness of 5-10 nm and a width of about 300-500 nm. Ag-ZnO composites were synthesized using glucose with the assistance of PVP. The morphology of Ag-ZnO composites was almost unchanged compared to ZnO. Where, the Ag nanoparticles in the size range of 5 to 15 nm were uniformly dispersed on the ZnO petals, improving the catalytic ability of the composites in tartrazine (TA) degradation. The influence of Ag content on catalytic structure and performance of composite was studied. The 5Ag-ZnO sample had the highest BET surface area and pore volume and the lowest gap energy (Eg) among the as-synthesized samples. The 5Ag-ZnO sample proclaimed the degradation efficiency (DE) in 70 min of 97.8% and the kap of 0.031 min-1. The influences of catalyst content, solution pH, and concentration of dye on the photodegradation efficiency of the composite were thoroughly studied. Besides, the photocatalytic activity of the composite was demonstrated by degrading various organic substances and reusability. In addition, it was compared to a metal-semiconductor catalyst of Au-ZnO and semiconductor-semiconductor catalysts of MoS2-ZnO, Cu2O-ZnO, and SiO2-ZnO. The catalytic mechanism under visible light was proposed.

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“…According to our knowledge, there are insufficient studies on the photocatalytic degradation of pharmaceutical products using ZnO catalysts doped with various rare metals under visible light irradiation. In a recent study, Alahmadi et al [ 15 ] used Pt@ZnO nanorods as photocatalysts for ciprofloxacin degradation under visible light irradiation. The authors reported 100% efficiency after 120 min of irradiation.…”

Section: Introductionmentioning

confidence: 99%

Nd-Doped ZnO Nanostructures with Enhanced Photocatalytic Performance for Environmental Protection

Pascariu¹,

Cojocaru

Samoilă³

et al. 2023

IJMS

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Neodymium (Nd)-doped ZnO nanostructures with different amounts of Nd were obtained by the electrospinning–calcination method. X-ray diffraction measurements indicated that the prepared nanostructures have a wurtzite structure without undesirable impurities. Nd doping changes the mean crystallite size as well the lattice strain, as proved by Williamson–Hall plots. The ZnO-based nanostructures were tested as photocatalysts for methylene blue (MB) dye and ciprofloxacin (CIP) drug pollutant degradations under visible light irradiation. Corroborating the obtained results, it was found that the reaction rate constant increased almost linearly with the mean crystallite size (from 2.235 × 10−2 to 3.482 × 10−2 min−1) with a variation in the mean crystallite size from 24.2 to 42.1 nm. Furthermore, the best catalyst sample (0.1% Nd-doped ZnO) was used to optimize the photodegradation process of ciprofloxacin, taking into account the pollutant concentration as well as the catalyst dose. The removal efficiency after 120 min was about 100%, with the rate constant of k = 5.291·10−2 min−1 (CIP) and k = 4.780·10−2 min−1 (MB) for the established optimal conditions. Considering the value of the rate constant, the half-life of the reaction (τ1/2 = ln2/k) was evaluated to be about τ1/2 =13 min for CIP and 14.5 min corresponding to MB. Several catalytic cycles were successfully performed without any loss of photocatalytic activity using these nanostructures, demonstrating that the obtained nanostructures have good stability in the leaching processes.

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Superficial visible-light-responsive Pt@ZnO nanorods photocatalysts for effective remediation of ciprofloxacin in water

Cited by 17 publications

References 63 publications

Impact of Ag/ZnO Reinforcements on the Anticancer and Biological Performances of CA@Ag/ZnO Nanocomposite Materials

Impact of Ag/ZnO Reinforcements on the Anticancer and Biological Performances of CA@Ag/ZnO Nanocomposite Materials

Preparation of carnation-like Ag-ZnO composites for enhanced photocatalysis under visible light

Nd-Doped ZnO Nanostructures with Enhanced Photocatalytic Performance for Environmental Protection

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