Design of hierarchically meso–macroporous tetragonal ZrO2 thin films with tunable thickness by spin-coating via sol–gel template route

Soo, Mun Teng; Kawamura, Go; Muto, Hiroyuki; Matsuda, Atsunori; Lockman, Zainovia; Cheong, Kuan Yew

doi:10.1016/j.micromeso.2012.09.010

Cited by 16 publications

(15 citation statements)

References 72 publications

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“…A broad peak is displayed in the 2θ range of 17 • -36 • for the as-synthesized materials possessing silicon in their composition (Figure 3a), which is probably associated with the frameworks having amorphous walls in line with TEM results. This also suggests the occurrence of nanocrystallites possessing a long-range ordering of macro-mesopores, similarly to the results reported elsewhere [19,21,22].…”

Section: Meso-macrostructure and Morphologysupporting

confidence: 89%

Binary Oxides with Defined Hierarchy of Pores in the Esterification of Glycerol

et al. 2016

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Abstract:Various porous binary oxides with elevated textural properties were obtained in this work. The as-synthesized solids were calcined or modified by reflux and extraction processes. Characterizations through SEM, nitrogen physisorption and TEM techniques demonstrated the formation of porous metal oxide networks over all solids. XRD, thermal analyses and FTIR measurements showed the existence of nanosized rutile TiO 2 , tetragonal ZrO 2 , SiO 2 and γ-Al 2 O 3 phases on the solids. The structure and texture of the as-synthesized SiAl sol-gel derived solid resulted in the formation of well-dispersed nanoparticles on the support. The removal of the organic compounds by ethanol extraction or reflux from SiAl resulted in the presence of structures with defined hierarchy of pores. Among the solids studied, the catalytic results in the esterification of glycerol with acetic acid indicated that best performances were obtained over SiAl sample when submitted to extraction and reflux treatments. This was due to the creation of accessible pores, which facilitated the reaction occurrence at glycerol to acetic acid molar ratio = 1:3 and T = 80 • C for 20 h using 75 mg of catalyst. The solids can be reused three times without complete loss of their catalytic performance.

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Section: Meso-macrostructure and Morphologysupporting

confidence: 89%

Binary Oxides with Defined Hierarchy of Pores in the Esterification of Glycerol

et al. 2016

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“…Porous metal oxide nanomaterials such as silicon dioxide [15][16][17], titanium dioxide [18][19][20], zirconium dioxide [21][22][23], cerium dioxide [24][25][26], and other materials [27][28][29] with large surface areas have been applied in chemical catalysis, gas absorption, separation, drug delivery, and energy storage materials [30][31][32][33][34][35]. In this context, our group developed unique metal oxide nanoparticle assemblies with submicron-sized spherical morphologies by a simple one-pot and single-step solvothermal approach [36].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Effect of Zirconia Filler Surface on Mechanical Tensile Strength of Polymer Composites

et al. 2020

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A characteristic effect of a nano-concave-convex structure of a zirconia nanoparticle assembly with an inherent porous structure and huge surface area enabled us to introduce systematic surface modification by thermal treatment to smooth surface and polymer impregnation to mask the nano-concave-convex structure of the zirconia nanoparticle assembly. A polymer composite prepared from 30 wt% poly(N-isopropylacrylamide) containing 0.02 wt% zirconia nanoparticle assembly with the inherent nano-concave-convex surface structure showed the highest tensile strength in mechanical tensile testing. However, both sintered zirconia nanoparticle assembly with smooth surface and zirconia nanoparticle assemblies with polymer masked surface showed lower strength with longer elongation at break in mechanical tensile testing.

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“…Zirconium oxide (ZrO 2 ) is useful for technological applications due to its high refractive index, high transparency in the visible and near-infrared regions, high dielectric constant, high-energy band gap, high density, high hardness, high electrical conductivity, strong wear resistance, high fracture toughness, low thermal conductivity and extreme chemical inertness [1][2][3][4][5][6][7]. Zirconium oxide has found use in many diverse applications, including catalysis, surface supports, laser systems, gate dielectrics, optical and electronic devices, magnetic recording disks, and biomedical and prosthetic coatings [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Five-Layered ZrO₂ and Single-Layered Ce, Eu, and Dy-Doped ZrO₂ Thin Films Prepared by Sol-Gel Spin Coating Method

et al. 2017

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In order to investigate the influence of the number of layers on the properties of ZrO2 thin films, we prepared one pure ZrO2 film sample with five layers and Ce, Eu, and Dy-doped ZrO2 samples with single layer, by spincoating sol gel-method. The crystal structures of thin films were determined using X-ray diffraction, morphology of the samples was analyzed by scanning electron microscopy, and the optical properties of the samples were determined by ultraviolet/visible absorbance measurements. The results of these measurements have shown that the concentration of the dopants and the thickness of thin film layers play a vital role in the physical, chemical, and optical properties of the pure and doped ZrO2 thin films.

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Design of hierarchically meso–macroporous tetragonal ZrO2 thin films with tunable thickness by spin-coating via sol–gel template route

Cited by 16 publications

References 72 publications

Binary Oxides with Defined Hierarchy of Pores in the Esterification of Glycerol

Binary Oxides with Defined Hierarchy of Pores in the Esterification of Glycerol

Nanoscale Effect of Zirconia Filler Surface on Mechanical Tensile Strength of Polymer Composites

Comparison of Five-Layered ZrO₂ and Single-Layered Ce, Eu, and Dy-Doped ZrO₂ Thin Films Prepared by Sol-Gel Spin Coating Method

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Design of hierarchically meso–macroporous tetragonal ZrO2 thin films with tunable thickness by spin-coating via sol–gel template route

Cited by 16 publications

References 72 publications

Binary Oxides with Defined Hierarchy of Pores in the Esterification of Glycerol

Binary Oxides with Defined Hierarchy of Pores in the Esterification of Glycerol

Nanoscale Effect of Zirconia Filler Surface on Mechanical Tensile Strength of Polymer Composites

Comparison of Five-Layered ZrO2 and Single-Layered Ce, Eu, and Dy-Doped ZrO2 Thin Films Prepared by Sol-Gel Spin Coating Method

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Comparison of Five-Layered ZrO₂ and Single-Layered Ce, Eu, and Dy-Doped ZrO₂ Thin Films Prepared by Sol-Gel Spin Coating Method