Growth mechanism studies of ZnO nanowire arrays via hydrothermal method

Chevalier-César, Clotaire; Capochichi-Gnambodoe, Martine; Leprince‐Wang, Yamin

doi:10.1007/s00339-013-7908-8

Cited by 85 publications

(79 citation statements)

References 37 publications

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“…The former can be achieved by hydrothermal synthesis of ZnO nanowires, which allows a high density array of ZnO at the maximum processing temperature of ~90°C. 15,16 The latter requires a 3D porous network of graphene with a low-cost fabrication method. 17,18,19 Recently, an increasing number of studies have demonstrated the adoption of commodity products as structured substrates for growing functional nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Sponge-Templated Macroporous Graphene Network for Piezoelectric ZnO Nanogenerator

Chen

Kumar

et al. 2015

ACS Appl. Mater. Interfaces

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We report a simple approach to fabricate zinc oxide (ZnO) nanowire based electricity generators on three-dimensional (3D) graphene networks by utilizing a commercial polyurethane (PU) sponge as a structural template. Here, a 3D network of graphene oxide is deposited from solution on the template and then is chemically reduced. Following steps of ZnO nanowire growth, polydimethylsiloxane (PDMS) backfilling and electrode lamination completes the fabrication processes. When compared to conventional generators with 2D planar geometry, the sponge template provides a 3D structure that has a potential to increase power density per unit area. The modified one-pot ZnO synthesis method allows the whole process to be inexpensive and environmentally benign. The nanogenerator yields an open circuit voltage of ∼0.5 V and short circuit current density of ∼2 μA/cm(2), while the output was found to be consistent after ∼3000 cycles. Finite element analysis of stress distribution showed that external stress is concentrated to deform ZnO nanowires by orders of magnitude compared to surrounding PU and PDMS, in agreement with our experiment. It is shown that the backfilled PDMS plays a crucial role for the stress concentration, which leads to an efficient electricity generation.

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Section: Introductionmentioning

confidence: 99%

Sponge-Templated Macroporous Graphene Network for Piezoelectric ZnO Nanogenerator

Chen

Kumar

et al. 2015

ACS Appl. Mater. Interfaces

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“…43,44 Four varied temperatures (70 °C, 80 °C, 90 °C, and 100 °C) are investigated to study the influence of the reaction temperature as shown in Fig. 3.…”

Section: Resultsmentioning

confidence: 99%

Wetting properties and SERS applications of ZnO/Ag nanowire arrays patterned by a screen printing method

et al. 2016

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Three-dimension (3D) ZnO/Ag nanowire arrays (NWA) SERS substrates are fabricated by screen printing technique. The preparation of patterned ZnO NWA involves a two-step growth process. The ZnO nanoparticles (NPs)-based ink is prepared and printed as seed layers, which are used as templates to fabricate patterned ZnO NWA via a hydrothermal method. During the screen printing process, the patterns of ZnO NWA are controlled by printing plates. The as-obtained NWA with 2 uniform morphology was fabricated at 90 °C, which exhibit hydrophilic and lipophilic properties.Subsequently, the sensitive 3D SERS substrates are fabricated through deposition of Ag NPs onto the surface of patterned ZnO NWA by magnetron sputtering. The detection limit of Malachite green (MG) can achieve 10 -12 M with an enhancement factor of about 2.5×10 10 . Combined with the sensitivity and uniformity, the ZnO/Ag NWA is applied for the quick detection of low concentrations of molecules related to food safety, such as amoxicillin.

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“…The ZnO NWs were synthesized by a low cost two-step hydrothermal method with a high aspect ratio [17], offering a large effective surface, which is beneficial for the photocatalytic process.…”

Section: Zno Nanowire Synthesismentioning

confidence: 99%

ZnO Nanostructure Based Photocatalysis for Water Purification

Leprince‐Wang¹,

Martin²,

Habba³

et al. 2020

NanoWorld J

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In recent years, semiconductor based photocatalysis has shown great potential for an application as a low-cost, environmentally friendly and sustainable water treatment technology. Its efficiency has been widely demonstrated on the removal of persistent organic compounds in water. This paper studies the photocatalytic activity of ZnO nanowires (NWs) grown on a substrate, a configuration which can be considered advantageous over freely suspended nanoparticles (NPs) commonly used in many research works, due to its easy removal from purified water and reutilization. The characterization of the ZnO NWs morphology and structure was performed by scanning electron microscope (SEM) and X-ray diffraction (XRD) measurements. The photocatalytic efficiency study has been carried out by using three organic dyes (MB, MO and AR14), as commonly used pollutants in various industrial activities. For a better understanding of the photocatalytic efficiency versus the liquid regime, the photocatalysis has been carried out under classic mode and microfluidic mode. All tests shown the notable photocatalytic efficiency of ZnO NWs. Moreover, remarkable results were achieved with our ZnO-NWs-integrated microfluidic reactor, which exhibited an important enhancement of photocatalytic activity by reducing the photodegradation time from hours to minutes.

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Growth mechanism studies of ZnO nanowire arrays via hydrothermal method

Cited by 85 publications

References 37 publications

Sponge-Templated Macroporous Graphene Network for Piezoelectric ZnO Nanogenerator

Sponge-Templated Macroporous Graphene Network for Piezoelectric ZnO Nanogenerator

Wetting properties and SERS applications of ZnO/Ag nanowire arrays patterned by a screen printing method

ZnO Nanostructure Based Photocatalysis for Water Purification

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