Synergistic effect in plasmonic Au/Ag alloy NPs co-coated TiO2 NWs toward visible-light enhanced CO2 photoreduction to fuels

Tahir, Muhammad Nawaz; Tahir, Beenish; Amin, Nor Aishah Saidina

doi:10.1016/j.apcatb.2016.11.062

Cited by 240 publications

(96 citation statements)

References 47 publications

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“…It confirms the successful incorporation of silver onto the PVA ‐co‐ PE nanofibrous membrane via PEI/PDA layer. Seen from the Ag 3d core‐level spectrum, the XPS spectrum in Figure S7c in the Supporting Information, only two peaks at 368.1 and 374.1 eV could be clearly observed, which was assigned to Ag0 3d5/2 and Ag0 3d3/2, respectively, indicating the presence of Ag in the metal state without the oxidation state of Ag even on the surface of Ag NPs due to the stabilization of citrate. The XPS O1s core‐level spectrum consists of two peak components at 531.60 and 532.70 eV (Figure S7b, Supporting Information), which are assigned to CO in oxidized dopamine of PDA and citrate, as well as OH from PVA ‐co‐ PE and original dopamine of PDA .…”

Section: Resultsmentioning

confidence: 99%

A Readily Accessible Functional Nanofibrous Membrane for High‐Capacity Immobilization of Ag Nanoparticles and Ultrafast Catalysis Application

Liu

Cheng

Kong

et al. 2018

Adv Materials Inter

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IntroductionAs one of the most prevalent noble metal materials, Ag nanoparticles (NPs) possess unique distinct heterogeneous catalytic Constructing macroscopic materials with optimal surface structure to immobilize silver nanoparticles polluted in water environment and further maximize their practical functionality still remains a great challenge. An infrequent strategy is developed to build a flexible material system combining PVA-co-PE nanofiber membrane (NFM) scaffold and mussel-inspired polydopamine (PDA), which provides a formidable surface interacting with polyethyleneimine (PEI). The resultant PEI/PDA/NFM presents an ultrahigh adsorption capacity (727.8 mg g −1 ) to citrate-capped silver nanoparticles much higher than the values reported in the literatures. The broad applicability of the multifunctional composite membranes in water treatment is further demonstrated. Interestingly, a promising concurrent performance of antibacterial, antifouling, and catalysis is acquired in bacterial filtrations. Benefiting from the structure, a plasma process further enhances the catalytic performance of AgNPs-PEI/PDA/NFM with an ultrahigh turnover frequency value: 6.65 × 10 −1 mol mol −1 min −1 , which facilitates the fast degradation treatment of p-nitrophenol (p-NP) in continuous-flow filtration. The excellent properties can be rationally assigned to the optimized surface structure synergistically determined by the high specific area of porous nanofiber scaffold and high substrate adaptability of reactive polydopamine. This implies the superiority of membranes obtained by present strategy in recycling Ag NPs contaminant and further applies it in fast-efficient wastewater treatment applications.

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Section: Resultsmentioning

confidence: 99%

A Readily Accessible Functional Nanofibrous Membrane for High‐Capacity Immobilization of Ag Nanoparticles and Ultrafast Catalysis Application

Liu

Cheng

Kong

et al. 2018

Adv Materials Inter

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“…Ag‐NP/ZnO composites were fabricated via reported methods with minor modifications: 0.134 g (1.66 mmol) of as‐prepared ZnO was ultrasonically dispersed in deionized water (50 mL; 200 MHz, 100 W) for 15 min. A certain amount of AgNO 3 — n [Ag(NO 3 ):ZnO] = 1:20, 1:10, 1:5, 1:2, 1:1—was then dissolved in deionized water (50 mL).…”

Section: Methodsmentioning

confidence: 99%

Probing nanocolumnar silver nanoparticle/zinc oxide hierarchical assemblies with advanced surface plasmon resonance and their enhanced photocatalytic performance for formaldehyde removal

Liu

Shan

Chen

et al. 2019

Applied Organom Chemis

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Recent advances in photocatalysis focus on the development of materials with hierarchical structure and on the surface plasmon resonance (SPR) phenomenon exhibited by metal nanoparticles (NPs). In this work, both are combined in a material where size-controllable Ag-NPs are uniformly loaded onto the hierarchical microporous and mesoporous and nanocolumnar structures of ZnO, resulting in Ag-NP/ZnO nanocomposites. The embedded Ag-NPs slightly decrease the hydrophobicity of fibrous ZnO, improve its wettability, and increase the absorption of formaldehyde (H 2 CO) onto the photocatalyst, all of this resulting in excellent photodegradation of formaldehyde in aqueous solution. Besides, we found that Ag-NPs with optimal size not only accelerate the charge transfer to the surface of ZnO, but also strengthen the SPR effect in the intercolumnar channels of fibrous ZnO particles combining with high concentration of photo-generated radical species. The micro-to-mesoporous ZnO is like a nanoarray packed Ag-NPs. With Ag-NPs of diameter 2.5 < ϕ < 6.5 nm, ZnO exhibits the most superior photodegradation rate constant value of 0.0239 min −1 with total formaldehyde removal of 97%. This work presents a new feasible approach involving highly sophisticated Ag-NP/ZnO architecture combining the SPR effect and hierarchically ordered structures, which results in high photocatalytic activity for formaldehyde photodegradation.

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“…On the one hand, the light trapping of multi-metals can be largely enhanced due to the strong plasmon coupling of two types of metals [77,78]. On the other hand, the local electric field of multi-metals can be largely enhanced, which can benefit the hot electron generation and electron-hole pairs' separation [79,80]. Recently, Huang and co-workers used Au-Ag bimetallic nanoparticles to modify ZnO nanorods via a simple photodeposition procedure (see Figure 4a) [81].…”

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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Synergistic effect in plasmonic Au/Ag alloy NPs co-coated TiO2 NWs toward visible-light enhanced CO2 photoreduction to fuels

Cited by 240 publications

References 47 publications

A Readily Accessible Functional Nanofibrous Membrane for High‐Capacity Immobilization of Ag Nanoparticles and Ultrafast Catalysis Application

A Readily Accessible Functional Nanofibrous Membrane for High‐Capacity Immobilization of Ag Nanoparticles and Ultrafast Catalysis Application

Probing nanocolumnar silver nanoparticle/zinc oxide hierarchical assemblies with advanced surface plasmon resonance and their enhanced photocatalytic performance for formaldehyde removal

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

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