Excellent Photocatalytic degradation of Methylene Blue, Rhodamine B and Methyl Orange dyes by Ag-ZnO nanocomposite under natural sunlight irradiation

Stanley, R.; Jebasingh, J. Alphas; Vidyavathy, S. Manisha; Stanley, P. Kingston; Ponmani, P.; Shekinah, M.E.; Vasanthi, J.

doi:10.1016/j.ijleo.2021.166518

Cited by 38 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whereas, the stretching vibration Zn-O was exhibited with the weak peak at 470 cm −1 [46]. Additionally, the broad adsorption bands at around 3400 and 1509 cm −1 were ascribed to O-H stretching vibration of adsorbed water molecules on Ag-ZnO [47]. The appearance of peaks at 1636 and 1404 cm −1 could be imputed to the C=O vibration in absorbed CO 2 [48,49].…”

Section: Physiochemical Analysismentioning

confidence: 94%

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

Mac

Nguyen

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

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.

show abstract

Section: Physiochemical Analysismentioning

confidence: 94%

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

Mac

Nguyen

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

show abstract

“…The results were contrasted to dye degradation efficiency obtained using only iron oxide nanoparticles, as shown in Figure 6 . Silver nitrate (SN), isopropanol alcohol (IPA), ascorbic acid (AA), and ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) were used to detect e − , •OH, •O 2 − , and h + scavenging activity [ 55 ]. MB dye degradation efficiency by the as-prepared iron oxide nanoparticles decreases from 66.7–55.5% to 10.8–7.2% (SN), 22.9–19.7% (AA), 58.4–43.4% (EDTA), and 13.9–8.1% (IPA).…”

Section: Resultsmentioning

confidence: 99%

Influence of Different Capping Agents on the Structural, Optical, and Photocatalytic Degradation Efficiency of Magnetite (Fe3O4) Nanoparticles

Mbuyazi

Ajibade

2023

Nanomaterials

View full text Add to dashboard Cite

Octylamine (OTA), 1-dodecanethiol (DDT), and tri-n-octylphosphine (TOP) capped magnetite nanoparticles were prepared by co-precipitation method. Powder X-ray diffraction patterns confirmed inverse spinel crystalline phases for the as-prepared iron oxide nanoparticles. Transmission electron microscopic micrographs showed iron oxide nanoparticles with mean particle sizes of 2.1 nm for Fe3O4-OTA, 5.0 nm for Fe3O4-DDT, and 4.4 nm for Fe3O4-TOP. The energy bandgap of the iron oxide nanoparticles ranges from 2.25 eV to 2.76 eV. The iron oxide nanoparticles were used as photocatalysts for the degradation of methylene blue with an efficiency of 55.5%, 58.3%, and 66.7% for Fe3O4-OTA, Fe3O4-DDT, and Fe3O4-TOP, respectively, while for methyl orange the degradation efficiencies were 63.8%, 47.7%, and 74.1%, respectively. The results showed that tri-n-octylphosphine capped iron oxide nanoparticles are the most efficient iron oxide nano-photocatalysts for the degradation of both dyes. Scavenger studies show that electrons (e−) and hydroxy radicals (•OH) contribute significantly to the photocatalytic degradation reaction of both methylene blue and methyl orange using Fe3O4-TOP nanoparticles. The influence of the dye solution’s pH on the photocatalytic reaction reveals that a pH of 10 is the optimum for methylene blue degradation, whereas a pH of 2 is best for methyl orange photocatalytic degradation using the as-prepared iron oxide nano-photocatalyst. Recyclability studies revealed that the iron oxide photocatalysts can be recycled three times without losing their photocatalytic activity.

show abstract

“…This results in greater photocatalytic degradation of the dye under sunlight [43]. The higher intensity of PL signals leads to greater photocatalytic degradation of organic pollutants [44]. The increase in the atomic concentration of aluminum reveals the spinel phase for Z30A nanocomposite samples calcined at 450°C (see XRD spectra).…”

Section: Wavelenght (Nm)mentioning

confidence: 98%

Temperature annealing and aluminum atomic concentration effect on structural, morphological and optical properties of ZnO-Al 2 O 3 nanocomposites powders and photocatalytic performances

Benmaamar,

Ayadi,

Maifi

et al. 2024

Preprint

View full text Add to dashboard Cite

Pure ZnO nanoparticles and ZnO- Al2O3 nanocomposites prepared with Al2O3 content of 10, 20 and 30 atomic ratios were synthetized via Sol-gel method and then calcined for 2 h at different temperature 450 °C, 700 °C and 900 °C. The structural, morphological and optical properties of the powder as-synthetized are investigated. The methylene blue degradation reaction was used to assess the photocatalytic activities of ZnO powders. In the present work, the high purity of the nanoparticles was confirmed by EDS spectra. The XRD results show that ZnO powder has a wurtzite structure. The aluminum in composite powders leads to the appearance of the ZnAl2O4 spinel phase and increasing of annealing temperature reduce the crystallite size. The flower-like morphology was well defined in these nanocomposites with an average size in the nanometer range. Photoluminescence reveals the incorporation of aluminum into the as-synthetized nanocomposites. The optical absorption spectra have been presented the relationship between the band gap, particle size, annealing temperature, Al concentration and Urbach energy. Our result suggests that the annealing temperature 700 ⁰C can be considered as an order-disorder transition temperature. The best characteristics were present in the ZnO-30% at Al nanocomposite which give the best photoactivities.

show abstract

Excellent Photocatalytic degradation of Methylene Blue, Rhodamine B and Methyl Orange dyes by Ag-ZnO nanocomposite under natural sunlight irradiation

Cited by 38 publications

References 14 publications

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

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

Influence of Different Capping Agents on the Structural, Optical, and Photocatalytic Degradation Efficiency of Magnetite (Fe3O4) Nanoparticles

Temperature annealing and aluminum atomic concentration effect on structural, morphological and optical properties of ZnO-Al 2 O 3 nanocomposites powders and photocatalytic performances

Contact Info

Product

Resources

About