Ag-doped ZnO nanorods coated metal wire meshes as hierarchical photocatalysts with high visible-light driven photoactivity and photostability

Hsu, Mu-Hsiang; Chang, Chi‐Jung

doi:10.1016/j.jhazmat.2014.06.038

Cited by 144 publications

(53 citation statements)

References 40 publications

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“…It was very obvious that Ag_ZnO-SS had much higher light absorption ability than Ag_ZnO nanoparticles. A reasonable explanation to the enhanced light absorption is the nanorods film can have multilight-scattering between nanorods [16,18,20,22,37,38]. Fig.…”

Section: Crystal Structure Morphology and Optical Property Of Zno-ssmentioning

confidence: 97%

“…Besides, ZnO is easier to crystallize on different supports (e.g., stainless steel mesh) with low-temperature methods [16][17][18][19]. As reported by Vu et al [19], tailored ZnO nanostructures including nanorods on stainless steel mesh could be acquired by varying experimental parameters, such as Zn 2+ solution, temperature, surfactant addition, and so on.…”

Section: Introductionmentioning

confidence: 96%

“…ZnO nanorods on stainless steel m e s h h a v e b e e n a p p l i e d f o r o r g a n i c p o l l u t a n t photodegradation [20], photocatalytic H 2 production [18], and photocatalytic CO 2 and CH 4 conversion [21], all of which showed encouraging results. The outstanding performance of ZnO nanorods on stainless steel was attributed to the light trapping structure generated by ZnO nanorod arrays, where incident light was scattered multiple times, leading to the enhancement of light absorption efficiency [16]. Moreover, the stainless steel mesh can help the electron transfer due to its conductive nature, which can promote the charge separation [18].…”

Section: Introductionmentioning

confidence: 99%

“…What's more, immobilized ZnO on stainless steel mesh saved the effort of separating the photocatalysts from the solution and made photocatalyst recycling easier. To boost the photocatalytic performance of ZnO on stainless steel mesh, various methods have been applied, including metal [16] or nonmetal [18] modification, as well as metal oxide coupling [22]. Silver, as a noble metal, has been widely used to modify semiconductor materials by improving charge carrier transfer [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Atomic layer deposited TiO2 ultrathin layer on Ag_ZnO nanorods for stable and efficient photocatalytic degradation of RhB

Zhao

Deng

2017

Adv Compos Hybrid Mater

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Highly stable and active TiO 2 -coated Ag-modified ZnO nanorods supported on stainless steel mesh (xTi@Ag_ZnO-SS) were successfully synthesized in this work. A low-temperature one-pot hydrothermal method was used to grow Ag_ZnO on stainless steel mesh, and subsequently, an atomic layer deposition (ALD) technique was applied to deposit a TiO 2 layer on the surface of Ag_ZnO-SS. The addition of Ag-enhanced photoactivity via favored charge carrier transfer and the TiO 2 layer improved stability through suppressed corrosion under UV irradiation, which was demonstrated by cycling performance for RhB photodegradation in two aspects: morphology and photoactivity. After 10 cycles (2 h/cycle) RhB degradation tests under UV irradiation, all the TiO 2 -protected ZnO materials maintained more intact nanorods structure and more than 80% of the initial photoactivity in the 1st cycle, whereas the ZnO materials without TiO 2 coating were drastically deconstructed and only had 56% of initial photodegradation ability. Comprehensive study indicated that thicker TiO 2 layers resulted in higher stability but lower photoactivity due to the inhibited charge transfer. The developed TiO 2 @Ag_ZnO nanorods immobilized on stainless steel mesh demonstrated a promising strategy for the design of highly stable and active photocatalysts endowed with great industrial scalability and practicality.

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Section: Crystal Structure Morphology and Optical Property Of Zno-ssmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Atomic layer deposited TiO2 ultrathin layer on Ag_ZnO nanorods for stable and efficient photocatalytic degradation of RhB

Zhao

Deng

2017

Adv Compos Hybrid Mater

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“…A great variety of wire meshes exist, the more important properties being the mesh opening, the wire diameter, and the material used [2,13,14]. These types of structures have been used in different reactions for volatile organic compound (VOC) combustion [2,15], photocatalysis [16,17], selective catalytic reduction (SCR) of NO x [18], and also in physical processes, such as oil-water separation [19].…”

Section: Introductionmentioning

confidence: 99%

Stacked Wire Mesh Monoliths for the Simultaneous Abatement of VOCs and Diesel Soot

et al. 2018

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Structured catalysts based on Pt,CeO 2 deposited on stainless steel wire meshes were developed to build catalytic cartridges for the treatment of diesel exhaust gases. The cartridges were tested for the simultaneous combustion of volatile organic compounds (VOCs) and soot. To this end, n-hexane, acetyl acetate, and toluene were selected as probe molecules. Each of them were loaded together with real soot into the cartridges showing that while VOCs abatement takes place between 200 • C and 350 • C, soot combustion occurs in the 300-500 • C temperature range with an average maximum combustion rate at 420 • C. The catalytic cartridges were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and Brunauer-Emmett-Teller (BET) techniques. The mechanical stability of the coatings was confirmed by the ultrasound method. Air permeability of the cartridges prepared with different mesh sizes was also measured and the results were correlated using the Payri equation.

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Efficient Photocatalytic Degradation of Dyes over Hierarchical BiOBr/β‐Co(OH)₂/PVP Multicomponent Photocatalyst under Visible‐Light Irradiation

Liu

et al. 2015

ChemCatChem

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A novel visible‐light driven BiOBr/β‐Co(OH)2/PVP (PVP=polyvinylpyrrolidone) hierarchical multicomponent photocatalyst assembled in nanosheets was synthesized by a simple one‐pot solvothermal synthesis. The as‐prepared photocatalyst was characterized by field‐emitting scanning electron microscopy, transmission electron microscopy, N2 adsorption–desorption analysis, FTIR spectroscopy, energy‐dispersive X‐ray spectroscopy, X‐ray powder diffraction analysis, X‐ray photoelectron spectroscopy, UV/Vis diffuse reflectance spectra, and inductively coupled plasma atomic emission spectrometry. This research shows that the formation of the p–n heterojunction would be very conducive to effectively inhibit the recombination of the photoexcited electron–hole pairs and enhance the photoactivity significantly. Owing to its narrow band‐gap energy (≈2.49 eV) and fast interfacial charge migration, this novel photocatalyst can efficiently absorb visible light and shows an improved ability for utilizing light energy. Although both β‐Co(OH)2 and BiOBr alone exhibit little photoactivity for the degradation of dyes, the BiOBr/β‐Co(OH)2/PVP hierarchical multicomponent photocatalyst exhibits unexpected, surprisingly high photoactivity and stability in degrading dyes in aqueous solution at moderate Co/Bi molar ratio and moderate PVP addition. The catalyst′s photoactivity is approximately 9.7 times of that of β‐Co(OH)2 and 3.2 times of that of BiOBr. This unusual photoactivity mainly arises from the synergetic chemical coupling effects between BiOBr, β‐Co(OH)2, and PVP. The excellent photoactivity and photostability of this hierarchical multicomponent photocatalyst make it a promising photocatalyst under visible‐light response. Beyond that, this novel photocatalyst can be reused many times without significant loss of its activity.

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Ag-doped ZnO nanorods coated metal wire meshes as hierarchical photocatalysts with high visible-light driven photoactivity and photostability

Cited by 144 publications

References 40 publications

Atomic layer deposited TiO2 ultrathin layer on Ag_ZnO nanorods for stable and efficient photocatalytic degradation of RhB

Atomic layer deposited TiO2 ultrathin layer on Ag_ZnO nanorods for stable and efficient photocatalytic degradation of RhB

Stacked Wire Mesh Monoliths for the Simultaneous Abatement of VOCs and Diesel Soot

Efficient Photocatalytic Degradation of Dyes over Hierarchical BiOBr/β‐Co(OH)₂/PVP Multicomponent Photocatalyst under Visible‐Light Irradiation

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Ag-doped ZnO nanorods coated metal wire meshes as hierarchical photocatalysts with high visible-light driven photoactivity and photostability

Cited by 144 publications

References 40 publications

Atomic layer deposited TiO2 ultrathin layer on Ag_ZnO nanorods for stable and efficient photocatalytic degradation of RhB

Atomic layer deposited TiO2 ultrathin layer on Ag_ZnO nanorods for stable and efficient photocatalytic degradation of RhB

Stacked Wire Mesh Monoliths for the Simultaneous Abatement of VOCs and Diesel Soot

Efficient Photocatalytic Degradation of Dyes over Hierarchical BiOBr/β‐Co(OH)2/PVP Multicomponent Photocatalyst under Visible‐Light Irradiation

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Product

Resources

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Efficient Photocatalytic Degradation of Dyes over Hierarchical BiOBr/β‐Co(OH)₂/PVP Multicomponent Photocatalyst under Visible‐Light Irradiation