Photocatalytic activity of Ag-N co-doped ZnO nanorods under visible and solar light irradiations for MB degradation

Welderfael, Tesfay; Pattabi, Manjunatha; Pattabi, Rani M.; G, Arun Kumar Thilipan

doi:10.1016/j.jwpe.2016.11.001

Cited by 27 publications

(6 citation statements)

References 32 publications

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“…It is evident that our binary ZnO/MO photocatalysts studied in this work showed significantly significant photocatalytic performance compared to other catalytic systems. 78–86…”

Section: Resultsmentioning

confidence: 99%

“…It is evident that our binary ZnO/MO photocatalysts studied in this work showed signicantly signicant photocatalytic performance compared to other catalytic systems. [78][79][80][81][82][83][84][85][86] 3.2.4 Proposed mechanism for the photocatalytic degradation. The mechanism of photocatalysis is based on the generation of electrons (e − ) and holes (h + ) under light excitation.…”

Section: Photocatalytic Activity Studymentioning

confidence: 99%

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Synthesis and comparative study of the structural and optical properties of binary ZnO-based composites for environmental applications

et al. 2023

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“…It is evident that our binary ZnO/MO photocatalysts studied in this work showed significantly significant photocatalytic performance compared to other catalytic systems. 78–86…”

Section: Resultsmentioning

confidence: 99%

Section: Photocatalytic Activity Studymentioning

confidence: 99%

Synthesis and comparative study of the structural and optical properties of binary ZnO-based composites for environmental applications

et al. 2023

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“…Based on the same photocatalytic and charge-transfer mechanisms, N-doped ZnO/Ag nanoparticles [166] and honeycomb-like N-doped ZnO/Ag nanocomposites on wool fabric (figure 7(c)) [167] have been demonstrated to exhibit better UV light-driven photocatalytic activities for highefficiency degradation of methyl red and MB dyes than those of ZnO/Ag samples. Moreover, inspired by the synergistically enhanced visible light absorption by the narrowing bandgap (profiting from N doping) and the LSPR effect of Ag nanoparticles, Welderfael's, Sanchez's, and Kumar's groups developed visible/solar light-driven photocatalysts for highefficiency photocatalytic degradation of MB and MO dyes and 2-cholorphenol by, respectively, using N-doped ZnO/Ag NRs [168], NRs films (figure 7(d)) [169], and thin films (figure 7(e)) [170]. Optimizing the N-doped and Ag-decorated amounts can further improve photocatalytic efficiency.…”

Section: Nonmetal Dopingmentioning

confidence: 99%

Ag-decorated ZnO-based nanocomposites for visible light-driven photocatalytic degradation: basic understanding and outlook

Zhang¹,

Li²,

Xu³

2022

J. Phys. D: Appl. Phys.

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The heterogeneous photocatalytic processes have exhibited tremendous potential in the field of solar energy utilization and environmental remediation. Next to TiO2, ZnO has been widely used as a promising photocatalyst material in recent years. However, several noticeable drawbacks make it less effective, such as poor solar-light harvesting, and rapid recombination of the photo-excited charge carriers. The decoration of noble metal nanoparticles on ZnO surfaces is a feasible strategy by its localized surface plasmon resonance (LSPR) absorption for aggrandizing the visible absorption of ZnO, meanwhile the formation of the Schottky barrier at the metal-semiconductor interface can effectively separate the photo-induced charge carriers. Among them, due to the high conductivity, antimicrobial activity, mechanical thermal strength and electrical double layer capacitance of silver, Ag decorated ZnO (ZnO/Ag) nano-photocatalysts have exhibited a remarkably photocatalytic efficiency and high cost performance for degradation of organic pollutants, and been endowed them with growing applications. In this review, we focus on the recent advancements (including the fundamental degradation mechanism, synthesis methods, corresponding applications and optimized strategies related to the ZnO/Ag photocatalysis) in ZnO/Ag-based photocatalysts for visible light-driven photocatalytic degradation, and concluding with a perspective on the future direction and prospects of this type of nanocomposite photocatalysts.

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“…Photocatalysis is started by photons from UV light, which cause the electrons on the superficial of the photocatalyst to become excited in the valance band; these cause the electrons to go up into the conduction band and then leave positive openings [13]. e produced electron/hole pair incites a complex arrangement of reactions that can bring about the total degradation of organic contaminants, for example, a dye adsorbed on the semiconductor surface [14,15].…”

Section: Introductionmentioning

confidence: 99%

Polyaniline Supported Ag-Doped ZnO Nanocomposite: Synthesis, Characterization, and Kinetics Study for Photocatalytic Degradation of Malachite Green

Habtamu

Berhanu²,

Mender³

2021

Journal of Chemistry

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Ag-ZnO/PANI nanocomposite was prepared via the sol-gel technique following in situ oxidative polymerization of polyaniline (PANI). XRD, UV-Vis, and FT-IR spectroscopy were employed to study the crystal size, bandgap energy, and bond structure of as-synthesized nanocomposites. The mean crystallite size of the nanocomposite determined from XRD was 35.68 nm. Photocatalytic degradation of malachite green (MG) dye using as-synthesized photocatalysts was studied under visible light irradiation. The highest degradation efficiency was recorded for Ag-ZnO/PANI nanocomposites (98.58%) than Ag-ZnO nanoparticles (88.23%) in 120 min. The kinetics of photocatalytic degradation of MG follows pseudo-first-order reaction with rate order of 1.16 10−2 min−1. Moreover, the photocatalytic activity of Ag-ZnO/PANI nanocomposites was evaluated and compared with Ce-Cd oxide, electrospun P(3HB)-TiO2, and with other catalysts in the literature. The optimal conditions for photocatalytic degradation are as follows: the concentration of malachite green (0.2 g/l), pH (8), and the concentration of catalyst load (0.2 g/l) under visible light with an irradiation time of 120 min.

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Photocatalytic activity of Ag-N co-doped ZnO nanorods under visible and solar light irradiations for MB degradation

Cited by 27 publications

References 32 publications

Synthesis and comparative study of the structural and optical properties of binary ZnO-based composites for environmental applications

Synthesis and comparative study of the structural and optical properties of binary ZnO-based composites for environmental applications

Ag-decorated ZnO-based nanocomposites for visible light-driven photocatalytic degradation: basic understanding and outlook

Polyaniline Supported Ag-Doped ZnO Nanocomposite: Synthesis, Characterization, and Kinetics Study for Photocatalytic Degradation of Malachite Green

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