Preparation, Characterization and Immobilization of Ag‐Doped ZnO‐Nanorods into Ca and Cu Alginate Beads and Their Application in the Photodegradation of Methylene Blue

Aydın, Evrim Baran

doi:10.1002/slct.202102863

Cited by 5 publications

(2 citation statements)

References 60 publications

(94 reference statements)

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“…Photocatalytic water splitting using semiconductors is a promising method for generating H 2 [4] . Semiconductor photocatalysts can also produce oxidizing active species and decompose organic pollutants into CO 2 , H 2 O, and other small non‐toxic compounds in wastewater [7,8] . Accordingly, highly active semiconductor photocatalysts for H 2 production and organic dye degradation should be developed.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Performance of a ZnO/CdS Heterostructure for Hydrogen Production and Mixed Dye Degradation

Guo

Lü

et al. 2023

ChemistrySelect

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ZnO/CdS composite was prepared using a simple one‐step hydrothermal method, and its photocatalytic performance was investigated under different conditions. The photocatalytic efficiency of ZnO/CdS was 6345.04 μmol ⋅ g−1 ⋅ h−1 in H2 production from water splitting using Na2S and Na2SO3 as sacrificial agents. The photocatalytic efficiency of eosin Y‐sensitized ZnO/CdS was 6939.39 μmol ⋅ g−1 ⋅ h−1 when triethanolamine was used as a sacrificial agent. The photocatalytic activity of ZnO/CdS was better than those of pristine ZnO and CdS during H2 evolution. The ZnO/CdS composite also exhibited superior photocatalytic activity compared to pristine ZnO and CdS in the degradation of a mixed dye pollutant. The degradation rates of methylene blue, rhodamine B, and orange G in the mixed dye after 120 min of irradiation were 99.41 %, 92.96 %, and 65.74 %, respectively. Possible mechanisms for photocatalytic H2 production and photocatalytic degradation of organic pollutants have been proposed.

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Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Performance of a ZnO/CdS Heterostructure for Hydrogen Production and Mixed Dye Degradation

Guo

Lü

et al. 2023

ChemistrySelect

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“…The doping of ZnO induces the replacement of Zn 2+ ions by Ag + ions in the crystals, which was evidenced by the presence of low concentrations of silver ions (5.9%) in the nanoparticles. The presence of Ag + ions in the crystals should have promoted the charge transfer from a donor-derived impurity band to unoccupied 3D states at the ZnO Fermi level [27][28][29]. Figure 4B shows the fluorescence spectrum for non-doped ZnO nanoparticles for comparison purposes.…”

Section: Morphological Compositional and Optical Characterizationmentioning

confidence: 99%

Photodegradation of Tropaeolin O in the Presence of Ag-Doped ZnO Nanoparticles

Bailon-Ruiz,

Cedeño-Mattei,

Torres-Torres

et al. 2023

Micro

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Azo dyes such as Tropaeolin O have diverse applications in the textile, food, and biomedical industries. However, their recalcitrant properties make them toxic substances in surface waters. Nanocatalysts are photoactive nanoparticles that generate reactive oxygen species to destroy organic compounds. Moreover, the presence of dopant agents in the nanoparticles’ crystalline structure efficiently enhances photocatalytic activity. Ag-doped ZnO nanoparticles were prepared in ethylene glycol at 197 °C and characterized by UV-Vis absorption, photoluminescence, high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDX), and electron diffraction (ED). The particles were mainly spherical with a size of ~10 nm, a hexagonal structure, and an elemental composition of 56.2% Zn, 37.8% O, and 5.9% Ag. The particles evidenced a broad absorption peak in the UV region and two emission peaks. Absorption analysis indicates that 92% and 58% of Tropaeolin O were degraded using 100 and 50 ppm of Ag-doped ZnO nanoparticles, respectively, during the first 550 min. Ion chromatograms selected using quadrupole time-of-flight liquid chromatography-mass spectrometry (QTOF-LC-MS) indicate a complete Tropaeolin O degradation (295.04 m/z) during the first 330 min. Initially, the nanocatalyst attacks the electron-rich groups (-OH and -NH), generating the 277.03 m/z [M-OH]+ and 174.02 m/z (molecule rupture on the azo group). In addition, small oxidized fragments 167.03 m/z and 114.03 m/z confirm the nanoparticles’ photocatalytic capacity, and oxidized chains indicate the tropaeolin’s opening rings (including phtalic acids) and mineralization.

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Preparation of graphene–ZnO composite with enhanced photocatalytic performance

2022

Carbon Lett.

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Preparation, Characterization and Immobilization of Ag‐Doped ZnO‐Nanorods into Ca and Cu Alginate Beads and Their Application in the Photodegradation of Methylene Blue

Cited by 5 publications

References 60 publications

Enhanced Photocatalytic Performance of a ZnO/CdS Heterostructure for Hydrogen Production and Mixed Dye Degradation

Enhanced Photocatalytic Performance of a ZnO/CdS Heterostructure for Hydrogen Production and Mixed Dye Degradation

Photodegradation of Tropaeolin O in the Presence of Ag-Doped ZnO Nanoparticles

Preparation of graphene–ZnO composite with enhanced photocatalytic performance

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