Plasmonic photocatalytic activity of ZnO:Au nanostructures: Tailoring the plasmon absorption and interfacial charge transfer mechanism

Raji, R.; Gopchandran, K.G.

doi:10.1016/j.jhazmat.2019.01.052

Cited by 33 publications

(21 citation statements)

References 56 publications

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“…Various studies have proven the possibility of this mechanism. Raji et al investigated the solar-induced photocatalytic degradation of sulforhodamine B in the presence of plasmonic ZnO/Au nanostructures as a catalyst, finding that rapid degradation of the dye was achieved at the solar irradiation wavelength near 550 nm due to the incorporation of ZnO/Au plasmonic bands [50]. The high electronegativity of atomic gold resulted in good electron scavenging efficiency, enhanced light absorption with plasmonic effects, and the formation of a Schottky barrier in the ZnO/Au interface are the main reasons accounting for the enhanced photocatalytic activity of this structure (Figure 4a,b).…”

Section: Plasmonic Photocatalystsmentioning

confidence: 99%

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Photonic–Plasmonic Nanostructures for Solar Energy Utilization and Emerging Biosensors

et al. 2020

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Issues related to global energy and environment as well as health crisis are currently some of the greatest challenges faced by humanity, which compel us to develop new pollution-free and sustainable energy sources, as well as next-generation biodiagnostic solutions. Optical functional nanostructures that manipulate and confine light on a nanometer scale have recently emerged as leading candidates for a wide range of applications in solar energy conversion and biosensing. In this review, recent research progress in the development of photonic and plasmonic nanostructures for various applications in solar energy conversion, such as photovoltaics, photothermal conversion, and photocatalysis, is highlighted. Furthermore, the combination of photonic and plasmonic nanostructures for developing high-efficiency solar energy conversion systems is explored and discussed. We also discuss recent applications of photonic–plasmonic-based biosensors in the rapid management of infectious diseases at point-of-care as well as terahertz biosensing and imaging for improving global health. Finally, we discuss the current challenges and future prospects associated with the existing solar energy conversion and biosensing systems.

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Section: Plasmonic Photocatalystsmentioning

confidence: 99%

“…Hybrid plasmonic-photonic nanostructures. (a) FE-SEM images of ZnO/Au (1 mol %) nanoflower structure and (b) the transfer of the electron-hole pair in the ZnO/Au nanostructures shown in the schematic band diagram, responsible for the solar-irradiation-induced degradation of sulforhodamine B. Reproduced with permission from[50]. Copyright Elsevier, 2019.…”

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Photonic–Plasmonic Nanostructures for Solar Energy Utilization and Emerging Biosensors

et al. 2020

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“…During the whole photocatalytic process, a series of redox reactions will occur depending on the specific applications, including oxidation induced by the photogenerated holes and reduction caused by the photogenerated electrons (Figure 1). However, during the migration process of electron–hole pairs, fast recombination will simultaneously occur, which is negative for the AOPs that are yet to be suppressed [48,49,50]. On the other hand, to effectively utilize the redox reactions, a greater number of active sites must be generated on the surface of the photocatalysts [51].…”

Section: Principles Of the Carbonaceous Photocatalystsmentioning

confidence: 99%

Recent Advances in Carbonaceous Photocatalysts with Enhanced Photocatalytic Performances: A Mini Review

2019

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Photocatalytic processes based on various semiconductors have been widely utilized in different applications, with great potential for use in environmental pollution remediation and sustainable energy generation. However, critical issues, including low light adsorption capability, wide energy bandgap, and unsatisfactory physicochemical stability still seriously limit the practical applications of photocatalysts. As a solution, the introduction of carbonaceous materials with different structures and properties into a photocatalyst system to further increase the activity has attracted much research attention. This mini review surveys the related literatures and highlights recent progress in the development of carbonaceous photocatalysts, which include various metal semiconductors with activated carbon, carbon dots, carbon nanotubes/nanofibers, graphene, fullerene, and carbon sponges/aerogels. Moreover, graphitic carbon nitride is also discussed as a carbon-rich and metal-free photocatalyst. The recently developed synthesis strategies and proposed mechanisms underlying the photocatalytic activity enhancement for different applications are summarized and discussed. Finally, ongoing challenges and the developmental direction for carbonaceous photocatalysts are proposed.

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“…The highest photocatalytic activity at v = 10.00%/min was attained in ZnO/Au nanostructures [ 16 ]. These nanostructures were synthesized by the coprecipitation of ZnO and Au from hydrogen tetrachloroaurate(III) (HAuCl 4 ⋅3H 2 O), zinc nitrate (Zn(NO 3 ) 2 ⋅6H 2 O), and KOH solutions.…”

Section: Photocatalytic Activity Of Zno Based Nanostructuresmentioning

confidence: 99%

Photocatalysis with the Use of ZnO Nanostructures as a Method for the Purification of Aquatic Environments from Dyes

Kasumov

Korotkov

Karavaeva

et al. 2021

J. Water Chem. Technol.

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The papers devoted to the purification of aquatic environments from industrial contaminants with the use of ZnO based nanosized photocatalysts in the period of 2018–2020 are analyzed. The data published in these papers have made it possible to determine the dye ( V ) destruction rate used further as a photocatalytic activity criterion. As shown by the comparative analysis of the photocatalytic activity of the studies structures, the highest rates of water purification from industrial azodye contaminants are demonstrated by hybrid ZnO/Au structures. At a destruction rate of V = 10%/min, the ZnO/Au structures are much better than all the other considered types of catalysts due to their morphology, low recombination rate of photogenerated electron-hole pairs, and nanoparticles with an absorption spectrum close to the solar spectrum. The review of literature data shows that the greatest attention of researchers in the considered time period is focused on the problem of the purification of water sources from industrial contaminants and, first of all, azodyes. Essential attention is also paid to the technological approaches applied by the authors to increase the photocatalytic activity of ZnO based nanostructures.

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Plasmonic photocatalytic activity of ZnO:Au nanostructures: Tailoring the plasmon absorption and interfacial charge transfer mechanism

Cited by 33 publications

References 56 publications

Photonic–Plasmonic Nanostructures for Solar Energy Utilization and Emerging Biosensors

Photonic–Plasmonic Nanostructures for Solar Energy Utilization and Emerging Biosensors

Recent Advances in Carbonaceous Photocatalysts with Enhanced Photocatalytic Performances: A Mini Review

Photocatalysis with the Use of ZnO Nanostructures as a Method for the Purification of Aquatic Environments from Dyes

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