ZnO nanodisks decorated with Au nanorods for enhanced photocurrent generation and photocatalytic activity

She, Ping; Xu, Kongliang; Shang, Yinxing; He, Qinrong; Zeng, Shaohua; Yin, Shengyan; Lu, Guolong; Liang, Song; Sun, Hang; Liu, Zhenning

doi:10.1039/c7nj03968a

Cited by 23 publications

(16 citation statements)

References 52 publications

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“…The result clearly demonstrates that the photocurrent response of Au nanoparticles embedded ZnO nanorods is higher compared to bare ZnO nanorods, indicating the improvement in photocurrent generation due to electron transfer from ZnO nanorods to Au nanoparticles by enhancing the lifetime of photogenerated electrons. It is believed that the electron migration mechanism from the photoexcited ZnO surface to the electron deficient Au is responsible for photocurrent generation ,. Thus, the enhancement of the photoresponse speed can widen the opportunity of exploiting Au nanoparticles and ZnO nanorods composite nanostructure for superior photocatalytic activities.…”

Section: Resultsmentioning

confidence: 99%

One‐Pot Synthesis of Au Embedded ZnO Nanorods Composite Heterostructures with Excellent Photocatalytic Properties

Haldar

Biswas

Tanwar³

et al. 2018

ChemistrySelect

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Here, we have designed a noble composite nanostructure by embedding gold (Au) nanoparticles into zinc oxide (ZnO) nanorods surface in one pot synthesis as a photocatalyst. The formation the composite nanostructure was confirmed by X-ray diffraction, X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy and transmission electron microscopy investigations. Microscopic studies suggest that spherical Au nanoparticles are nucleated on the ZnO nanorods surface. XPS shows shifting of peak positions towards higher binding energy which indicates charge transfer from ZnO to Au in the composite nanostructures. This is unambiguously confirmed by the steady state spectroscopic studies. It was found that 95.7% (1.8 3 10 À5 mM) of Methylene blue dye is degraded by the composite nanostructure after 140 min under UV light illumination and the apparent rate constant was found to be 0.015 min À1 . This new class of Au nanoparticles embedded ZnO nanorods composite nanostructure opens up new possibilities in photocatalytic, solar energy conversion, photovoltaic, and other new emerging applications.

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Section: Resultsmentioning

confidence: 99%

One‐Pot Synthesis of Au Embedded ZnO Nanorods Composite Heterostructures with Excellent Photocatalytic Properties

Haldar

Biswas

Tanwar³

et al. 2018

ChemistrySelect

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“…The properties of nanostructured ZnO largely depend on its structural morphology, crystal size and crystal density. 15 Until now, different ZnO nanomorphologies such as nanotubes, 16 nanodisks, 17 nanowires, 18 nanobelts, 19 nanobridges, 20 nanonails 20 and nanocombs 21 have been known to be synthesized by various methods such as chemical vapor deposition, 22 thermal oxidation, 23 molecular beam epitaxy, 24 hydrothermal 25 and electrochemical. 26 ZnO which has hexagonal wurtzite structure is known as polar crystal.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical synthesize and characterization of ZnO / ZnS nanostructures for hydrogen production

Sığırcık

Aydın

2020

Int J Energy Res

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In present study, zinc oxide/zinc sulfide (ZnO/ZnS) nanostructures were fabricated by anodization of Zn. The morphological, structural and compositional properties of ZnO/ZnS were studied by field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). From FESEM results, welldefined and smooth spherical-like ZnO/ZnS nanostructures were obtained with tube-like ZnO nanostructures underneath the compact layer. XRD patterns revealed that achieved materials offer high crystallinity hexagonal ZnO as dominant with hexagonal close-packed polycrystalline Zn. Moreover, measure of water contact angle was realized to learn about wetting property of the electrodes. Electrochemical impedance spectroscopy (EIS) was recorded to examine electrocatalytic performance of electrodes against hydrogen evolution reaction (HER) in 1 M KOH solution. The values of energy consumption and energy efficiency were calculated as 571.9 kJ mol −1 and 49.5% at current density of 50 mA cm −2 for the HER on 40-ZnO/ZnS/Zn electrode at 25 C.

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“…In many cases, these reactions are carried out with the aid of other co‐reactants such as hydrogen peroxide or sodium borohydride with moderate to strong oxidant or reducing power, respectively . The most reported photocatalytic materials are semiconductors like titanium dioxide (TiO 2 ) or zinc oxide (ZnO), since they show relatively low price, great performance, chemical stability and long durability , , . However, their major downside is the specific requirement of ultraviolet (UV) wavelengths for their photoactivation, which is relatively more expensive to maintain and represents only around 5 % of the total solar radiation.…”

Section: Introductionmentioning

confidence: 99%

“…Silver or gold‐based nanoparticles can enhance the catalytic response of other material upon excitation with visible‐near infrared (Vis‐NIR) light due to this LSPR effect. By using these materials, it is feasible to promote the reactions under milder conditions and without harmful agents , , …”

Section: Introductionmentioning

confidence: 99%

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Triangular and Prism‐Shaped Gold‐Zinc Oxide Plasmonic Nanostructures: In situ Reduction, Assembly, and Full‐Range Photocatalytic Performance

et al. 2019

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Gold-based nanocatalysts have been traditionally selected for multiple homogeneous and heterogeneous reactions of interest involving redox processes. Likewise, greener routes involving more efficient reactors and the use of inexpensive and nature-mimicking excitation sources have boosted the research on photocatalysts that can drive these chemical reactions upon excitation with multiple wavelength sources beyond the UV range. In the present work we report on a multi-step synthesis approach that enables the in situ generation of triangular and prism-shaped gold nanostructures with a localized surface plasmon resonance effect and their direct assembly onto a ZnO nanostructured semiconductor support. Different [a]

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ZnO nanodisks decorated with Au nanorods for enhanced photocurrent generation and photocatalytic activity

Abstract: AuNR-/ZnONDKs with AuNRs decorated on the surfaces of round ZnO disks demonstrate superior photocurrent generation properties and photodegradation efficiency.

Cited by 23 publications

References 52 publications

One‐Pot Synthesis of Au Embedded ZnO Nanorods Composite Heterostructures with Excellent Photocatalytic Properties

One‐Pot Synthesis of Au Embedded ZnO Nanorods Composite Heterostructures with Excellent Photocatalytic Properties

Electrochemical synthesize and characterization of ZnO / ZnS nanostructures for hydrogen production

Triangular and Prism‐Shaped Gold‐Zinc Oxide Plasmonic Nanostructures: In situ Reduction, Assembly, and Full‐Range Photocatalytic Performance

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