Investigating the size effect of Au nanospheres on the photocatalytic activity of Au-modified ZnO nanorods

She, Ping; Xu, Kongliang; Zeng, Shaohua; He, Qinrong; Sun, Hang; Liu, Zhenning

doi:10.1016/j.jcis.2017.03.089

Cited by 45 publications

(22 citation statements)

References 37 publications

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“…For instance, an increase of the catalytic activity has been reported in metal-semiconductor nanocomposites as the size of the Au-NPs decreases. This effect is attributed to a shifting of the Fermi level towards more negative potentials [25,42]. Additionally, we propose that a greater interaction between the photogenerated charge carriers and the built-in electric field at the metal-semiconductor interfaces contributes to the observed enhancement.…”

Section: Photocatalytic Activitymentioning

confidence: 72%

A Comparative Study of Gold Impregnation Methods for Obtaining Metal/Semiconductor Nanophotocatalysts: Direct Turkevich, Inverse Turkevich, and Progressive Heating Methods

et al. 2018

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ZnO nanostructures decorated with gold nanoparticles (Au-NPs) were synthesized by thermal decomposition of ZnO 2 powders and their subsequent impregnation of metal nanoparticles using either the Direct Turkevich Method, the Inverse Turkevich Method, or the Progressive Heating Method. It was found that the impregnation approach influences the resulting microstructure and photocatalytic activity of the obtained materials. While the Direct Turkevich approach gave the highest yield of metal loading, the smallest Au-NPs were obtained by Inverse Turkevich and the Progressive Heating Method. The photocatalytic activity of the pristine support and gold-loaded samples was studied in the decolorization of Rhodamine B solutions using UV-and pure visible-light illumination. All Au-NPs/ZnO samples showed higher photocatalytic activity than the bare support when UV-light was used. This effect is attributed to a charge carrier separation due to electron transfer from ZnO to the metal nanoparticles and the built-in electric field at the interfaces. Contrarily to most reports, visible-light sensitization using plasmonic nanoparticles was not observed. The experimental evidence points against hot-electron injection from Au-NPs to the semiconductor component. This behavior is associated with the height of the Schottky barrier at the metal-semiconductor junctions. The differences in the photocatalytic performance among the samples under UV-and visible-light are explained in terms of the characteristics of the Au-NPs driven by the growth mechanism involved in each impregnation method and the physicochemical properties of the generated interfaces.

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Section: Photocatalytic Activitymentioning

confidence: 72%

A Comparative Study of Gold Impregnation Methods for Obtaining Metal/Semiconductor Nanophotocatalysts: Direct Turkevich, Inverse Turkevich, and Progressive Heating Methods

et al. 2018

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“…wt% Pd/Bi4O5Br2 composite shows higher photocatalytic activity for the degradation of BPA than an essential role in determining the photocatalytic efficiency of the developed composite photocatalyst [43,44]. In previous report, larger noble metal nanoparticles (≥ 10 nm) were reported to result in a superior photocatalytic activity under visible light irradiation due to stronger surface plasmonic resonance [45].…”

Section: Accepted Manuscriptmentioning

confidence: 94%

Pd nanoparticle-decorated Bi4O5Br2 nanosheets with enhanced visible-light photocatalytic activity for degradation of Bisphenol A

Zhu

Hojamberdiev

et al. 2018

Journal of Photochemistry and Photobiology A: Chemistry

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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“…The arrangement of components in multi-metals/semiconductor heterojunctions has a great influence on their final photocatalytic performance. Properly optimizing the structural configuration could increase the utilization efficiency of plasmon-induced hot electrons [92][93][94]. Meanwhile, abundant pathways for electron transfer could expedite the separation of electron-hole pairs.…”

Section: Plasmon Coupling Co-catalytic Effect and Components Arrangmentioning

confidence: 99%

Recent Progress in Constructing Plasmonic Metal/Semiconductor Hetero-Nanostructures for Improved Photocatalysis

Chen

Shao

et al. 2018

Catalysts

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Hetero-nanomaterials constructed by plasmonic metals and functional semiconductors show enormous potential in photocatalytic applications, such as in hydrogen production, CO2 reduction, and treatment of pollutants. Their photocatalytic performances can be better regulated through adjusting structure, composition, and components’ arrangement. Therefore, the reasonable design and synthesis of metal/semiconductor hetero-nanostructures is of vital significance. In this mini-review, we laconically summarize the recent progress in efficiently establishing metal/semiconductor nanomaterials for improved photocatalysis. The defined photocatalysts mainly include traditional binary hybrids, ternary multi-metals/semiconductor, and metal/multi-semiconductors heterojunctions. The underlying physical mechanism for the enhanced photocatalysis of the established photocatalysts is highlighted. In the end, a brief summary and possible future perspectives for further development in this field are demonstrated.

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Investigating the size effect of Au nanospheres on the photocatalytic activity of Au-modified ZnO nanorods

Cited by 45 publications

References 37 publications

A Comparative Study of Gold Impregnation Methods for Obtaining Metal/Semiconductor Nanophotocatalysts: Direct Turkevich, Inverse Turkevich, and Progressive Heating Methods

A Comparative Study of Gold Impregnation Methods for Obtaining Metal/Semiconductor Nanophotocatalysts: Direct Turkevich, Inverse Turkevich, and Progressive Heating Methods

Pd nanoparticle-decorated Bi4O5Br2 nanosheets with enhanced visible-light photocatalytic activity for degradation of Bisphenol A

Recent Progress in Constructing Plasmonic Metal/Semiconductor Hetero-Nanostructures for Improved Photocatalysis

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