Zinc Oxide nanorod/Au composite arrays and their enhanced photocatalytic properties

Liu, Xueqin; Li, Zhen; Zhao, Wenjing; Zhao, Cai-Xin; Yang, Jian‐Bo; Wang, Yang

doi:10.1016/j.jcis.2014.06.008

Cited by 29 publications

(14 citation statements)

References 25 publications

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“…Liu and coworkers 35 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 14 down the recombination process, as discussed by Subramanian et al 42 Our results are consistent with this mechanism. In the present work, the details of the results may be explained as follows.…”

Section: Resultssupporting

confidence: 82%

Photocatalytic Activity and Fluorescence of Gold/Zinc Oxide Nanoparticles Formed by Dithiol Linking

et al. 2015

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Monolayer-protected gold nanoparticles (AuNPs) with average diameters of 2-4 nm have been covalently attached to zinc oxide nanorods using dithiol ligands. Electron microscopy and Raman spectroscopy show that ozone treatment or annealing at 300 or 450 °C increases the average diameter of the AuNPs to 6, 8, and 14 (±1) nm, respectively, and decomposes the organic layers to various degrees. These treatments locate the AuNPs closer to the nanorods. Heating and subsequent ozone exposure changes the color of the as-prepared nanocomposite powder from blue to purple due to oxidation of the outer layer of the AuNPs, and heating to 300 °C changes it to pink due to oxygen desorption. ZnO nanorods have a bimodal photoluminescence spectrum that consists of an ultraviolet excitonic peak and a visible, surface defect-related peak. Ozone treatment and annealing of the nanocomposite decreases the intensities of both peaks due to quenching by the AuNPs, but the visible peak is affected less. The photocatalytic efficiency of the nanocomposites toward oxidative degradation of rhodamine B has been measured and follows the order 300 °C > 450 °C > ozone treated ≈ as-prepared ≈ bare ZnO. The greater efficiency of the annealed samples likely arises from decreased electron-hole pair recombination rates.

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Section: Resultssupporting

confidence: 82%

Photocatalytic Activity and Fluorescence of Gold/Zinc Oxide Nanoparticles Formed by Dithiol Linking

et al. 2015

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“…As the seed layer thickness decrease from 100 to 50 nm, the absorption edge increases from 3.21 eV to 3.27 eV (blueshift). Liu et al reported that the bandgap of pure ZnO NRs is 3.27 eV. Further decrease in seed layer thickness to 16nm causes to bandgap energy narrowing (redshift).…”

Section: Resultsmentioning

confidence: 99%

“…Recently, one‐dimensional (1D) ZnO nanomaterials (NMs) have been vastly studied because both their functional properties and highly controllable morphology make them central building blocks for understanding nanoscale phenomena and realizing nanoscale devices , . Owing to its specific optical and electrical properties due to high surface to volume ratio and quantum confinement effect, one‐dimensional ZnO nanomaterials have great potential applications in nanogenerators, photocatalysis, surface acoustic waveguides,, humidity sensors,, as well as in light‐emitting diode, sensors, solar cells,, photodetectors,, optical switches, field emission devices,, and resistive random access random memory . In addition, surface functionalization or by coupling the different properties of ZnO based semiconducting hybrids can expand the ZnO NMs applications.…”

Section: Introductionmentioning

confidence: 99%

Well Oriented ZnO Nanorods Array: Negative Resistance and Optical Switching

Rahmati

Yousefi

2017

Zeitschrift anorg allge chemie

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Well-oriented ZnO nanorods (NRs) arrays were grown on Si, alumina, quartz, and FTO substrates through a ZnO seed layer followed by low temperature wet chemical process. The influence of sputtered ZnO seed layer thickness (100, 50, 32, and 16 nm), annealing temperature and CuO x coverage on the characteristics of ZnO NRs were investigated in this study. The crystalline structural, chemical, morphological, optical, and electrical properties of ZnO NRs arrays were studied by X-ray diffraction (XRD), field emission-scanning electron microscopy equipped by energy dispersive X-ray spec-* Dr. A. Rahmati

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“…Preparation of RGO/ZnONRA : As shown in Scheme , ZnO nanorod arrays (ZnONRA) were prepared on the alloyed Fe–Co–Ni substrate via a facile one‐step approach . Notably, a seed layer was not needed, which simplified the preparation process.…”

Section: Methodsmentioning

confidence: 99%

A Simple Route to Reduced Graphene Oxide‐Draped Nanocomposites with Markedly Enhanced Visible‐Light Photocatalytic Performance

Liu

Yang

Zhao

et al. 2016

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Nanocomposites (denoted RGO/ZnONRA) comprising reduced graphene oxide (RGO) draped over the surface of zinc oxide nanorod array (ZnONRA) were produced via a simple low-temperature route, dispensing with the need for hydrothermal growth, electrochemical deposition or other complex treatments. The amount of deposited RGO can be readily tuned by controlling the concentration of graphene oxide (GO). Interestingly, the addition of Sn(2+) not only enables the reduction of GO, but also functions as a bridge that connects the resulting RGO and ZnONRA. Remarkably, the incorporation of RGO improves the visible-light absorption and reduces the bandgap of ZnO, thereby leading to the markedly improved visible-light photocatalytic performance. Moreover, RGO/ZnONRA nanocomposites exhibit a superior stability as a result of the surface protection of ZnONRA by RGO. The mechanism on the improved photocatalytic performance based on the cophotosensitizations under the visible-light irradiation has been proposed. This simple yet effective route to the RGO-decorated semiconductor nanocomposites renders the better visible-light utilization, which may offer great potential for use in photocatalytic degradation of organic pollutants, solar cells, and optoelectronic materials and devices.

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Zinc Oxide nanorod/Au composite arrays and their enhanced photocatalytic properties

Cited by 29 publications

References 25 publications

Photocatalytic Activity and Fluorescence of Gold/Zinc Oxide Nanoparticles Formed by Dithiol Linking

Photocatalytic Activity and Fluorescence of Gold/Zinc Oxide Nanoparticles Formed by Dithiol Linking

Well Oriented ZnO Nanorods Array: Negative Resistance and Optical Switching

A Simple Route to Reduced Graphene Oxide‐Draped Nanocomposites with Markedly Enhanced Visible‐Light Photocatalytic Performance

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