Fast vertical growth of ZnO nanorods using a modified chemical bath deposition

Lee, Tae-hyun; Ryu, Hyukhyun; Lee, Won–Jae

doi:10.1016/j.jallcom.2014.02.003

Cited by 39 publications

(20 citation statements)

References 28 publications

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“…The studies and preparation of nano-ZnO have attracted more and more attention globally; for example, the development of nanometer zinc oxide is included in the "863 Plan" in China. There are many methods used to prepare nano-ZnO in laboratory [10][11][12][13][14], which can be divided into chemical methods and physical methods. Among them, chemical methods are more studied, especially the thermal decomposition of zinc complexes with organic acid.…”

Section: Introductionmentioning

confidence: 99%

Room Temperature Solid State Synthesis, Characterization, and Application of a Zinc Complex with Pyromellitic Acid

Yang¹,

Wang²,

Liu³

2018

Crystals

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Abstract:The complex [Zn 2 (btca)(H 2 O) 4 ] was synthesized with 1,2,4,5-benzenetetracarboxylic acid (H 4 btca) and zinc acetate as materials via a room-temperature solid state reaction. The composition and structure of the complex were characterized by elemental analyses (EA), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and thermogravimetric (TG) analysis. The index results of X-ray powder diffraction data showed that the crystal structure of the complex belonged to monoclinic system with cell parameters a = 9.882 Å, b = 21.311 Å, c = 15.746 Å, and β = 100.69 • . In order to expand the application of the complex, the nanometer zinc oxide was prepared by using the complex as a precursor, and the effect of the thermal decomposition temperature on the preparation of the nanometer zinc oxide was studied. The results showed that the grain size of zinc oxide gradually grew with the increase of the pyrolysis temperature, the obtained nanometer zinc oxide was spherical, and the diameter of the particles was about 25 nm.

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Section: Introductionmentioning

confidence: 99%

Room Temperature Solid State Synthesis, Characterization, and Application of a Zinc Complex with Pyromellitic Acid

Yang¹,

Wang²,

Liu³

2018

Crystals

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“…In the study, ZnO nanorods were grown from 110 • C. A detailed description of the M-CBD process can be found in the literature. 25 peaks at 2θ = 33.88, 37.96, and 51.78 • arise from SnO 2 in the FTO substrate (ICSD card file : 01-077-0452). The CuO peaks are not found for the samples grown at 100 or 115 • C, but appear for the sample grown at 130 • C. This means that the CuO nanostructures were not grown at 100 or 115 • C, as mentioned in Figure 1.…”

Section: Resultsmentioning

confidence: 99%

“…Uniform growth of the oxide semiconductor can be provided by a constant concentration of solution, which can overcome the limits of conventional hydrothermal or chemical bath deposition methods. 25 Furthermore, the M-CBD process can use any type of substrate, such as TCO, metals and polymers, and enables very rapid growth of the oxide semiconductor by heating the substrate directly through conductive heating; convective heating is normally used in other solution processes. Recently, our group has reported the rapid growth of ZnO nanorods using the M-CBD method, 25 indicating the robustness of the method for growing various types of oxide semiconductors.…”

mentioning

confidence: 99%

Effects of Growth Temperature on Cupric Oxide Nanorod Photoelectrodes Using a Modified Chemical Bath Deposition

Ryu

Lee

2014

J. Electrochem. Soc.

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In this study, vertically aligned CuO nanorods were grown on a fluorine-doped tin oxide (FTO) substrate by a modified chemical bath deposition process at various growth temperatures. Field emission gun scanning electron microscopy, X-ray diffraction and UVvisible spectroscopy were used to characterize the morphological, structural and optical properties of the CuO nanorods, respectively. The photoelectrochemical properties of CuO nanorods as a photoelectrode were also measured in aqueous electrolyte solution (1 M KOH) under 1-sun illumination conditions (1.5 AM filter, 100 mW/cm 2 ) with a three-electrode potentiostat. In this study, well aligned CuO nanorods were obtained with a high growth rate (as high as 113 nm/min). Furthermore, primarily (020) directional growth was determined from X-ray diffraction measurements, and a maximum photocurrent density of −1.02 mA/cm 2 at −0.6 V (vs. saturated calomel electrode) was obtained from the CuO nanorod photoelectrode grown in this experiment.Photoelectrochemical (PEC) cells are considered to be efficient solar energy converters. 1 PEC cells convert solar energy into storable clean energy as hydrogen is created from water. Accordingly, many studies have used solar energy in water splitting for the production of hydrogen. 1-7 Semiconductors such as TiO 2 , 1-3 SrTiO 3 , 4 BaTiO 4 , 5 and ZnO 6 have been investigated as photoelectrode candidates. These materials are stable inside electrolytes but cannot fully absorb visible light due to their large band gaps. An ideal semiconductor for a PEC cell should have a bandgap between 1.7 and 2.1 eV, which is larger than the theoretical minimum value of 1.23 eV needed for water splitting, 8 and should be economically available. Therefore, cupric oxide (CuO) is expected to be a promising photoelectrode candidate due to its narrow bandgap and abundance. 7,8 CuO is well regarded as a p-type semiconductor with a narrow bandgap (1.4-1.7 eV) and has been extensively studied due to its properties and applications in electronics, sensors, optics, batteries, field emission devices, superconductors and photocatalysts. 9-15 Many studies have been carried out to synthesize various CuO nanostructures because the properties of CuO depend on its structure and morphology. [16][17][18] In particular, one-dimensional (1-D) structures such as nanorods with large surface areas are attracting much attention because of the many advanced properties of such 1-D nanostructures. 19,20 In this regard, the vertical growth of the 1-D CuO nanostructure is relevant to CuO photoelectrodes.Many growth methods have been developed for the synthesis of CuO 1-D nanostructures, such as hydrothermal, 21,22 and arc-discharge processes, 23 thermal evaporation 24 and thermal oxidation using copper foil. 11,20 However, these conventional methods have challenges, including growth rate, cost efficiency and synthesis on a transparent conducting oxide (TCO) substrate. In this study, CuO nanorods were synthesized using a modified chemical bath deposition (M-CBD) method that hea...

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“…ZnO can also be used in polyethylene and polyester hybrid composites to improve the performance of composites [6,7]. ZnO can be synthesized with various morphologies, such as nanoparticles [8], nanoflowers [9,10], nanoneedles [11], and nanorods [12] ZnO hollow nanospheres [13,14] have also attracted much attention because of their lower densities, higher surface areas, and distinct optical attributes as compared to their bulk solids, which may have promising applications in photocatalysts, photonic crystals, filters, gas sensors, coatings, and capsule agents for drug delivery. The success of these applications strongly depends on the availability of ZnO hollow nanospheres with tightly controlled size, uniform distribution and surface properties.…”

Section: Introductionmentioning

confidence: 99%

Strong yellow emission of ZnO hollow nanospheres fabricated using polystyrene spheres as templates

et al. 2015

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Fast vertical growth of ZnO nanorods using a modified chemical bath deposition

Cited by 39 publications

References 28 publications

Room Temperature Solid State Synthesis, Characterization, and Application of a Zinc Complex with Pyromellitic Acid

Room Temperature Solid State Synthesis, Characterization, and Application of a Zinc Complex with Pyromellitic Acid

Effects of Growth Temperature on Cupric Oxide Nanorod Photoelectrodes Using a Modified Chemical Bath Deposition

Strong yellow emission of ZnO hollow nanospheres fabricated using polystyrene spheres as templates

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