Bio-capped facile synthesis of silver zinc oxide for photocatalytic degradation of Rhodamine 6G under visible-light irradiation

Majumder, Soma; Basnet, Parita; Mukherjee, Jaya; Chatterjee, Somenath

doi:10.1063/5.0017417

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…The holes formed by the excitation of electrons will generate · OH radicals by oxidation of hydroxyl ions. Thus, the as-formed superoxide anion radicals and hydroxyl radicals are mainly responsible for the effective mineralization of dyes into CO 2 and water 82 , 83 . The increase of silver amount on the surface of ZnO decreases the photocatalytic degradation efficiency.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic degradation activity of goji berry extract synthesized silver-loaded mesoporous zinc oxide (Ag@ZnO) nanocomposites under simulated solar light irradiation

Sharwani

Narayanan

Khan

et al. 2022

Sci Rep

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Different approaches have been developed for the synthesis of various nanostructured materials with unique morphologies. This study demonstrated the photocatalytic and antimicrobial abilities of silver-loaded zinc oxide nanocomposites (Ag@ZnO NCs). Initially, ZnO with a unique mesoporous ellipsoidal morphology in the size range of 0.59 ± 0.11 × 0.33 ± 0.09 µm (length × width) was synthesized using aqueous precipitation in a mild hydrothermal condition (80 °C) with the aqueous fruit extract of goji berry (GB) (as an additive) and calcined in air at 200 °C/2 h and 250 °C/3 h. Powder X-ray diffraction (XRD) revealed the formation of a hexagonal phase of the wurtzite (WZ) structure. The average crystallite size of ZnO was 23.74 ± 4.9 nm as calculated using Debye–Scherrer’s equation. It also possesses higher thermal stability with the surface area, pore volume, and pore size of 11.77 m2/g, 0.027 cm3/g, and 9.52 nm, respectively. Furthermore, different mesoporous Ag@ZnO NCs loaded with face-centered cubic (fcc) silver nanoparticles (Ag NPs) in the range of 90–160 nm were synthesized by GB extract as a reducing and capping agent on the surface of ZnO after calcination in air. The immobilization of Ag NPs was confirmed by XRD, X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM), FE-transmission electron microscopy (FE-TEM), and energy-dispersive X-ray spectroscopy (EDS). It was found that Ag0.2@ZnO NC (0.2 wt% of Ag) showed excellent photocatalytic degradation of both methylene blue (MB) (cationic) and congo red (CR) (anionic) dyes under simulated solar irradiation. The photocatalytic degradation of 99.3 ± 0.35% MB and 98.5 ± 1.3% CR occurred in 90 and 55 min, respectively, at room temperature by Ag0.2@ZnO NC. Besides, these NCs also showed broad-spectrum antibacterial activity against both Gram-positive and Gram-negative bacteria. The mechanistic concept of generating reactive oxygen species (ROS) by electron and hole charge (e‾/h+) carriers seems to be responsible for the photocatalytic degradation of commercial dyes and antibacterial activities by Ag@ZnO NCs. Thus, these silver-loaded mesoporous ellipsoidal ZnO NCs are promising candidates as photocatalysts for industrial/wastewater treatment as well as in antimicrobial therapeutics.

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Section: Resultsmentioning

confidence: 99%

Photocatalytic degradation activity of goji berry extract synthesized silver-loaded mesoporous zinc oxide (Ag@ZnO) nanocomposites under simulated solar light irradiation

Sharwani

Narayanan

Khan

et al. 2022

Sci Rep

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show abstract

“…The holes formed by the excitation of electrons will generate •OH radicals by oxidation of hydroxyl ions. Thus, the as-formed superoxide anion radicals and hydroxyl radicals are mainly responsible for the effective mineralization of dyes into CO 2 and water 70,71 . The increase of silver amount on the surface of ZnO-GB decreases the photocatalytic degradation e ciency.…”

Section: Mechanism Of Photocatalytic Activitymentioning

confidence: 99%

Photocatalytic degradation activity of goji berry extract-mediated green synthesized antibacterial silver-zinc oxide nanocomposites under simulated solar light irradiation

Sharwani

Narayanan

Khan

et al. 2022

Preprint

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Green synthesis has gained extensive attention in material science because of its sustainability and eco-friendliness in producing a wide range of nanomaterials. This study demonstrated the photocatalytic and antimicrobial abilities of green synthesized silver-embedded zinc oxide nanocomposites (Ag@ZnO NCs). Zinc oxide with a unique mesoporous ellipsoidal morphology in size range of 0.59 ± 0.11 × 0.33 ± 0.09 µm (length × width) was synthesized using the aqueous extract of goji berry (ZnO-GB) by calcination in the air. Powder X-ray diffraction (XRD) revealed the formation of a hexagonal phase of wurtzite (WZ) structure. The average crystallite size of ZnO-GB was 23.74 ± 4.9 nm as calculated using Debye–Scherrer’s equation. It also possesses higher thermal stability with the surface area, pore-volume, and pore size of 11.77 m2/g, 0.027 cm3/g, and 9.52 nm, respectively. Furthermore, different mesoporous Ag@ZnO NCs embedded with face-centered cubic (fcc) silver nanoparticles (Ag NPs) in the range of 90–160 nm were synthesized by GB extract as a reducing and capping agent on the surface of ZnO-GB after calcination. The immobilization of Ag NPs was confirmed by XRD, X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM), FE-transmission electron microscopy (FE-TEM), and energy-dispersive X-ray spectroscopy (EDS). It was found that Ag0.2@ZnO NC (0.2 wt% of Ag) showed excellent photocatalytic degradation of both methylene blue (MB) (cationic) and congo red (CR) (anionic) dyes under simulated solar irradiation. The photocatalytic degradation of 99.3 ± 0.35% MB and 98.5 ± 1.3% CR occurred in 90 and 55 min, respectively, at room temperature by Ag0.2@ZnO NC. Besides, these NCs also showed broad-spectrum antibacterial activity against both Gram-positive and Gram-negative bacteria. The mechanistic concept of generating reactive oxygen species (ROS) by electron and hole charge (e‾/h+) carriers seems to be responsible for the photocatalytic degradation of commercial dyes and antibacterial activities by Ag@ZnO NCs. Thus, these as-prepared green Ag@ZnO NCs are promising candidates as photocatalysts for industrial/wastewater treatment as well as in antimicrobial therapeutics.

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Synthesis and Characterization of Ag@M-BTC (M = Zn & Cd) Nanocomposites for Efficient Removal of Methylene Blue and Indigo Carmine

Brahma,

Ray,

Majumder

et al. 2023

Preprint

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Bio-capped facile synthesis of silver zinc oxide for photocatalytic degradation of Rhodamine 6G under visible-light irradiation

Cited by 3 publications

References 18 publications

Photocatalytic degradation activity of goji berry extract synthesized silver-loaded mesoporous zinc oxide (Ag@ZnO) nanocomposites under simulated solar light irradiation

Photocatalytic degradation activity of goji berry extract synthesized silver-loaded mesoporous zinc oxide (Ag@ZnO) nanocomposites under simulated solar light irradiation

Photocatalytic degradation activity of goji berry extract-mediated green synthesized antibacterial silver-zinc oxide nanocomposites under simulated solar light irradiation

Synthesis and Characterization of Ag@M-BTC (M = Zn & Cd) Nanocomposites for Efficient Removal of Methylene Blue and Indigo Carmine

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Bio-capped facile synthesis of silver zinc oxide for photocatalytic degradation of Rhodamine 6G under visible-light irradiation

Cited by 3 publications

References 18 publications

Photocatalytic degradation activity of goji berry extract synthesized silver-loaded mesoporous zinc oxide (Ag@ZnO) nanocomposites under simulated solar light irradiation

Photocatalytic degradation activity of goji berry extract synthesized silver-loaded mesoporous zinc oxide (Ag@ZnO) nanocomposites under simulated solar light irradiation

Photocatalytic degradation activity of goji berry extract-mediated green synthesized antibacterial silver-zinc oxide nanocomposites under simulated solar light irradiation

Synthesis and Characterization of Ag@M-BTC (M = Zn &amp; Cd) Nanocomposites for Efficient Removal of Methylene Blue and Indigo Carmine

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Synthesis and Characterization of Ag@M-BTC (M = Zn & Cd) Nanocomposites for Efficient Removal of Methylene Blue and Indigo Carmine