Fabrication of superhydrophobic sol–gel composite films using hydrophobically modified colloidal zinc hydroxide

The low dielectric constant of the nonpolar polymer poly(1-butene) (PB-1) limits its application as a diaphragm element in energy storage capacitors. In this work, Ba(Zr0.2Ti0.8)O3-coated multiwalled carbon nanotubes (BZT@MWCNTs) were first prepared by using the sol–gel hydrothermal method and then modified with polydopamine (PDA) via noncovalent polymerization. Finally, PB-1 matrix composite films filled with PDA-modified BZT@MWCNTs nanoparticles were fabricated through a solution-casting method. Results indicated that the PDA-modified BZT@MWCNTs had good dispersion and binding force in the PB-1 matrix. These characteristics improved the dielectric and energy storage performances of the films. Specifically, the PDA-modified 10 vol% BZT@ 0.5 vol% MWCNTs/PB-1 composite film exhibited the best dielectric performance. At 1 kHz, the dielectric constant of this film was 25.43, which was 12.7 times that of pure PB-1 films. Moreover, its dielectric loss was 0.0077. Furthermore, under the weak electric field of 210 MV·m−1, the highest energy density of the PDA-modified 10 vol% BZT@ 0.5 vol% MWCNTs/PB-1 composite film was 4.57 J·cm−3, which was over 3.5 times that of PB-1 film (≈1.3 J·cm−3 at 388 MV·m−1).

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Optical Isomerization and Photo-Patternable Properties of GeO2/Ormosils Organic-Inorganic Composite Films Doped with Azobenzene

Coatings ◽

10.3390/coatings11070818 ◽

2021 ◽

Vol 11 (7) ◽

pp. 818

Author(s):

Xuehua Zhang ◽

Qian Wang ◽

Shun Liu ◽

Wei Zhang ◽

Fangren Hu ◽

...

Keyword(s):

Optical Waveguide ◽

Data Storage ◽

Optical Switching ◽

Sol Gel ◽

Composite Films ◽

Optical Data Storage ◽

Optical Data ◽

Single Chip ◽

Coating Method ◽

Inorganic Composite

GeO2/organically modified silane (ormosils) organic-inorganic composite films containing azobenzene were prepared by combining sol-gel technology and spin coating method. Optical waveguide properties including the refractive index and thickness of the composite films were characterized by using a prism coupling instrument. Surface morphology and photochemical properties of the composite films were investigated by atomic force microscope and Fourier transform infrared spectrometer. Results indicate that the composite films have smooth and neat surface, and excellent optical waveguide performance. Photo-isomerization properties of the composite films were studied by using a UV–Vis spectrophotometer. Optical switching performance of the composite films was also studied under the alternating exposure of 365 nm ultraviolet light and 410 nm visible light. Finally, strip waveguides and microlens arrays were built in the composite films through a UV soft imprint technique. Based on the above results, we believe that the prepared composite films are promising candidates for micro-nano optics and photonic applications, which would allow directly integrating the optical data storage and optical switching devices onto a single chip.

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The Preparation and Photocatalytic Activity of SWNTs Doped ZnO/TiO2 Compound Films

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.1611 ◽

2010 ◽

Vol 97-101 ◽

pp. 1611-1615 ◽

Cited By ~ 1

Author(s):

Qing Wang ◽

Xin Li Li ◽

Wei Nie ◽

Yong Mei Xia ◽

Jian Feng Dai

Keyword(s):

Photocatalytic Activity ◽

Absorption Spectra ◽

Sol Gel ◽

Composite Films ◽

Wavelength Region ◽

Tio2 Films ◽

X Ray Diffraction ◽

Sol Gel Process ◽

Doped Zno ◽

Walled Carbon Nanotubes

The ZnO/TiO2 composite films were deposited over glass using spin coating technique by sol-gel process. Single-walled carbon nanotubes (SWNTs) were used to modify the ZnO/TiO2 films successfully in this paper. The structure and composition of the ZnO/TiO2 composite and SWNTs doped ZnO/TiO2 composite were characterized by X-ray diffraction (XRD). The morphology of samples was characterized by scanning electron microscopy (SEM). The photocatalytic activity was investigated by photocatalytic degradation of aqueous methyl orange under ultraviolet (UV) radiation. The UV-vis absorption spectra of the ZnO/TiO2 films and SWNTs doped ZnO/TiO2 films in the wavelength region 200~800 nm were obtained. The results indicate that the SWNTs addition can decrease the grain size of ZnO/TiO2, which can enhance the photocatalytic activity. UV-vis absorption spectra of SWNTs-ZnO/TiO2 showed obvious blue shifts compared with ZnO/TiO2. The optimal amount of doping SWNTs is 1% according to this research. The enhanced mechanism of the SWNTs for the photocatalytic activity in ZnO/TiO2 films was analyzed in this article.

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Frequency control of sol–gel composite films fabricated by stencil printing for nondestructive testing applications

Japanese Journal of Applied Physics ◽

10.7567/jjap.55.07ke15 ◽

2016 ◽

Vol 55 (7S1) ◽

pp. 07KE15

Author(s):

Tsukasa Kaneko ◽

Taiga Kibe ◽

Keisuke Kimoto ◽

Ryota Nishimura ◽

Makiko Kobayashi

Keyword(s):

Nondestructive Testing ◽

Frequency Control ◽

Sol Gel ◽

Composite Films ◽

Stencil Printing

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Study on the Influence Factors of ZnFe2O4 and TiO2 Composite Films Photoelectrocatalytic Properties

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.2199 ◽

2011 ◽

Vol 287-290 ◽

pp. 2199-2202

Author(s):

Gui Qin Hou ◽

Wen Li Zhang ◽

Shui Jing Gao ◽

Xiao Yan Wang

Keyword(s):

Methyl Orange ◽

Sol Gel ◽

Composite Films ◽

Influence Factors ◽

Nanocomposite Films ◽

Gel Method ◽

Sol Gel Method ◽

Conductive Glass ◽

Photocatalytic Activities ◽

Film Layer

The ZnFe2O4 and TiO2 nanocomposite films was prepared by Sol-Gel method on conductive glass, and the influence factors of it’s photoelectrocatalytic performence such as the film layer, pole and voltage was investigated. The results indicated that: the photocatalytic effects of composite films with ZnFe2O4+ TiO2+ ZnFe2O4 was the best. The decomposing ratio of methyl orange with the photoelectrocatalysis of composite films at voltage 0.2-6V all increased unstably.At the same time, the distance from films to pole plank also had the effects on the photocatalytic activities of the films.

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Preparation of ZnO-Zn2TiO4Sol Composite Films and Its Photocatalytic Activities

Journal of Nanomaterials ◽

10.1155/2013/428419 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 10

Author(s):

Xiujuan Qin ◽

Li Cui ◽

Guangjie Shao

Keyword(s):

Methyl Orange ◽

Photocatalytic Oxidation ◽

Spectral Response ◽

Sol Gel ◽

Composite Films ◽

Visible Region ◽

Performance Testing ◽

Structure Characterization ◽

Semiconductor Oxides ◽

Wide Range

Ti-doped ZnO sol-composite films were prepared on the glass substrate by the two-step sol-gel technique. X-ray diffraction, Uv-Vis spectrophotometer, and FS spectrum of composite films were used to help make structure characterization and optical performance testing. The results showed that the composite was a mixture of ZnO + Zn2TiO4. Because of synergistic effect of both semiconductor oxides, composite films had a wide range of spectral response in the visible region, and the absorption band edge was about 510 nm, and the Green Belt of composite films luminous significantly enhanced. Photocatalytic oxidation experiments showed that using the composite films treatment (16.5 ml, l0 mg/L methyl orange aqueous solution)/cm2, the decolorization rate of methyl-orange was 90% after 3 hours irradiation.

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The effects of Ta2O5–ZnO films as cathodic buffer layers in inverted polymer solar cells

Journal of Materials Chemistry A ◽

10.1039/c4ta01350f ◽

2014 ◽

Vol 2 (24) ◽

pp. 9361-9370 ◽

Cited By ~ 23

Author(s):

Jo-Lin Lan ◽

Sheng-Jye Cherng ◽

Yi-Hsun Yang ◽

Qifeng Zhang ◽

Selvam Subramaniyan ◽

...

Keyword(s):

Solar Cells ◽

Polymer Solar Cells ◽

Sol Gel ◽

Composite Films ◽

Buffer Layers ◽

Zno Films ◽

Varied Composition ◽

Gel Processing ◽

Inverted Polymer Solar Cells ◽

Excellent Stability

Ta2O5–ZnO composite films with varied composition were fabricated by sol–gel processing and applied as cathodic buffer layers (CBLs) for inverted polymer solar cells, and demonstrated enhanced power conversion efficiency with excellent stability.

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Optical and mechanical properties of TiO2/SiO2/organically modified silane composite films prepared by sol–gel processing

Thin Solid Films ◽

10.1016/s0040-6090(99)00746-4 ◽

2000 ◽

Vol 359 (2) ◽

pp. 177-183 ◽

Cited By ~ 80

Author(s):

Wenxiu Que ◽

Z Sun ◽

Y Zhou ◽

Y.L Lam ◽

Y.C Chan ◽

...

Keyword(s):

Mechanical Properties ◽

Sol Gel ◽

Composite Films ◽

Organically Modified ◽

Organically Modified Silane ◽

Optical And Mechanical Properties ◽

Gel Processing

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Sol-gel synthesis and characterization of Ag nanoparticles in ZrO2 thin films

Journal of Materials Research ◽

10.1557/jmr.2009.0314 ◽

2009 ◽

Vol 24 (8) ◽

pp. 2541-2546 ◽

Cited By ~ 7

Author(s):

Eisuke Yokoyama ◽

Hironobu Sakata ◽

Moriaki Wakaki

Keyword(s):

Thin Films ◽

Sol Gel ◽

Composite Films ◽

Dip Coating ◽

Molar Ratio ◽

X Ray Diffraction ◽

Silver Surface ◽

Molar Ratios ◽

Sol Gel Synthesis

ZrO2 thin films containing silver nanoparticles were prepared using the sol-gel method with Ag to Zr molar ratios [Ag]/[Zr] = 0.11, 0.25, 0.43, 0.67, 1.00, 1.50, and 2.33. After dip coating on glass substrate, coated films were annealed at 200 and 300 °C in air. X-ray diffraction peaks corresponding to crystalline Ag were observed, but a specific peak corresponding to ZrO2 was not observed. At the molar ratio [Ag]/[Zr] = 0.25, the particle size of Ag distributed broadly centered at 17 nm for an annealing temperature of 200 °C and at 25 nm for 300 °C. The films annealed in air at 200 °C showed an absorption band centered at 450 nm because of the silver surface plasmon resonance, whereas films heated at 300 °C in air caused a red shift of the absorption to 500 nm. The absorption peak was analyzed using the effective dielectric function of Ag-ZrO2 composite films modeled with the Maxwell-Garnett expression.

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