Synthesis of spherical Ag/ZnO heterostructural composites with excellent photocatalytic activity under visible light and UV irradiation

Liu, Hairui; Hu, Yanchun; Zhang, Zhuxia; Liu, Xuguang; Jia, Husheng; Xu, Bingshe

doi:10.1016/j.apsusc.2015.07.012

Cited by 152 publications

(56 citation statements)

References 45 publications

(28 reference statements)

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“…In fact, as observed in the SEM analysis, when the content of Au was low, the NPs were better distributed on the fibers without forming large aggregates, as in the case of higher amount of Au (PMMA/ZnO-Au6). The presence of Au aggregates on the ZnO NPs catalyst causes a decrease of their active surface exposed towards the organic pollutants and also a less effective light penetration due to a screening effect [22,28,47]. This result is also confirmed by previous studies; as a matter of fact, there is an optimal concentration of metallic NPs for the surface modification of the metal oxide semiconductors, beyond which the photocatalytic performance declines [46,48].…”

Section: Resultssupporting

confidence: 84%

Au/ZnO Hybrid Nanostructures on Electrospun Polymeric Mats for Improved Photocatalytic Degradation of Organic Pollutants

Campagnolo

Lauciello

Athanassiou

et al. 2019

Water

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An innovative approach for the fabrication of hybrid photocatalysts on a solid porous polymeric system for the heterogeneous photocatalytic degradation of organic pollutants is herein presented. Specifically, gold/zinc oxide (Au/ZnO)-based porous nanocomposites are formed in situ by a two-step process. In the first step, branched ZnO nanostructures fixed on poly(methyl methacrylate) (PMMA) fibers are obtained upon the thermal conversion of zinc acetate-loaded PMMA electrospun mats. Subsequently, Au nanoparticles (NPs) are directly formed on the surface of the ZnO through an adsorption dipping process and thermal treatment. The effect of different concentrations of the Au ion solutions to the formation of Au/ZnO hybrids is investigated, proving that for 1 wt % of Au NPs with respect to the composite there is an effective metal–semiconductor interfacial interaction. As a result, a significant improvement of the photocatalytic performance of the ZnO/PMMA electrospun nanocomposite for the degradation of methylene blue (MB) and bisphenol A (BPA) under UV light is observed. Therefore, the proposed method can be used to prepare flexible fibrous composites characterized by a high surface area, flexibility, and light weight. These can be used for heterogeneous photocatalytic applications in water treatment, without the need of post treatment steps for their removal from the treated water which may restrict their wide applicability and cause secondary pollution.

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Section: Resultssupporting

confidence: 84%

Au/ZnO Hybrid Nanostructures on Electrospun Polymeric Mats for Improved Photocatalytic Degradation of Organic Pollutants

Campagnolo

Lauciello

Athanassiou

et al. 2019

Water

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“…In the range of 200-800 nm, two absorption bands can be observed for the Ag/ZnO composites. The absorption band located at the UV region can be ascribed to the absorption of ZnO and the absorption peak fell in visible range is thought to be the characteristic absorption of surface plasmon resonance (SPR) caused by silver nanoparticles [38][39]. The SPR effect tends to strengthen with the increasing of Ag content and can enhance the visible light absorption ability of the catalysts.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Ag-ZnO Microspheres with Enhanced Photocatalytic Degradation Activities

Wu¹,

Jian²,

Dang³

et al. 2017

Pol. J. Environ. Stud.

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“…The conductivity of the conducting substrates should play an important role in PEC. It was noted that Ag was often used to prepare Ag/ZnO nanowire heterostructures, which could enhance separation of the photo‐induced carriers, for the improvement of PC activities . Moreover, Ag possesses high electron conductivity (6.301 × 10 −7 S m −1 at 20 °C).…”

Section: Introductionmentioning

confidence: 99%

Chemical bath deposition of well-aligned ZnO nanorod arrays on Ag rods for photoelectrocatalytic degradation of rhodamine B

Han

et al. 2017

Phys. Status Solidi A

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Phone: þ86 150 9328 3484, Fax: þ86 371 6776 6629ZnO nanorod arrays (NAs) were prepared by a simple two-step process on the Ag rods. The X-ray diffraction and HRTEM characterizations indicated that ZnO nanorods were hexagonal wurtzite single crystalline structure. Photoelectrocatalytic performances of Ag rods with ZnO NAs (ZnO NAs/Ag rods) were studied systematically for the removal of rhodamine B (RhB). Under the optimal condition, the photoelectrocatalytic efficiency was nearly twice the photocatalytic efficiency, which can be attributed to the more efficient separation of photo-generated carriers. Our results show that ZnO NAs/Ag rods should be a promising photoelectrode for photoelectrocatalysis progress.

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Synthesis of spherical Ag/ZnO heterostructural composites with excellent photocatalytic activity under visible light and UV irradiation

Cited by 152 publications

References 45 publications

Au/ZnO Hybrid Nanostructures on Electrospun Polymeric Mats for Improved Photocatalytic Degradation of Organic Pollutants

Au/ZnO Hybrid Nanostructures on Electrospun Polymeric Mats for Improved Photocatalytic Degradation of Organic Pollutants

Hierarchical Ag-ZnO Microspheres with Enhanced Photocatalytic Degradation Activities

Chemical bath deposition of well-aligned ZnO nanorod arrays on Ag rods for photoelectrocatalytic degradation of rhodamine B

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