Interfacial sol–gel processing for preparation of porous titania particles using a piezoelectric inkjet nozzle

Kadota, Kazunori; Tamura, Hikaru; Shirakawa, Yoshiyuki; Tozuka, Yuichi; Shimosaka, Atsuko; Hidaka, Jusuke

doi:10.1016/j.cherd.2014.03.004

Cited by 20 publications

(10 citation statements)

References 33 publications

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“…The TiO 2 particles were prepared using an interfacial solgel processing. 21) Distilled water adjusted to pH 2.0 using HCl was added to acetonitrile with volume fraction of 10 vol.%. Six ml of TTIP was added to 60 ml of hexane.…”

Section: Methods 221 Preparation Of Tio 2 Particlesmentioning

confidence: 99%

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Novel preparation method of nitrogen-doped TiO<sub>2</sub> hollow particles by the reaction crystallization in refined droplet

Tominaga

Kadota

Oshima

et al. 2019

J. Ceram. Soc. Japan

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We succeeded in fabricating the uniform spherical titanium oxide (TiO 2) hollow particles improved photocatalytic activity by doping nitrogen under visible light irradiation using new processing. To prepare the uniform spherical nitrogen-doped TiO 2 particles with monodispersed size distribution and monodispersed pore distribution, we performed the reaction crystallization within the confined droplet by inkjet nozzle. The absorption edge of the TiO 2 particles shifted to the lower wavelength side with an increase in the sintering temperature. TiO 2 particles prepared by an inkjet process exhibited spherical porous structures with uniform size distribution, resulting that this process would be controllable to nitrogen-doped TiO 2 particles. The results indicated that the chemical states of the nitrogen doping and the light absorption characteristics of the TiO 2 particles could be controlled by the sintering temperature.

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Section: Methods 221 Preparation Of Tio 2 Particlesmentioning

confidence: 99%

“…The morphology of TiO 2 particles could be controlled by utilizing the obtained spherical interface as a particle precipitation field. 21) The hollow TiO 2 particles with uniform spherical morphology were successfully produced by a process using an inkjet nozzle.…”

Section: Introductionmentioning

confidence: 99%

Novel preparation method of nitrogen-doped TiO<sub>2</sub> hollow particles by the reaction crystallization in refined droplet

Tominaga

Kadota

Oshima

et al. 2019

J. Ceram. Soc. Japan

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“…LLIC may be an advisable strategy to obtain the hierarchical architecture HMX. The liquid–liquid interface between the two partially miscible liquids provides a very unique non‐equilibrium crystallization environment and has been successfully applied to prepare the hierarchical architectures of a series of metal, semiconductor, salts, and oxides et al . This crystallization technique can be operated at normal and constant temperature without any thermal energy, so, it is a promising method to apply to heat sensitive explosives.…”

Section: Introductionmentioning

confidence: 99%

A Three‐Dimensional Hierarchical Dandelion‐Like HMX Architecture Formed at a Liquid‐Liquid Interface

Cheng

Duan

et al. 2018

Crystal Research and Technology

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A facile and mild method, liquid‐liquid interface crystallization (LLIC), is reported for the fabrication of the hierarchical structure of octahydro‐1,3,5‐tetranitro‐1,3,5,7‐tetrazocine (HMX) under ambient conditions. The morphology and structure are characterized by field emission scanning electron microscopy (FE‐SEM), dynamic light scattering (DLS), powder X‐ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy. A three‐dimensional hierarchical dandelion‐like HMX architecture is obtained through self‐assembling of the submicron particles with a main diameter range of 250–700nm at the interface of DMSO solution and CH2Cl2. Except the main polymorph β, the δ phase is found in the product. Thermal analyses are performed, and the kinetic parameter is calculated. The results indicate that hierarchical structure HMX presents much higher activation energy (280.82 KJ mol−1) than raw HMX (258.90 KJ mol−1). Similarly, the exothermic decomposition peak of HMX hierarchical structure also reaches 287.7 °C and is basically the same as raw HMX (288.4 °C). From the results of the sensitivity tests, the impact and friction sensitivities of HMX are significantly increased compared with those of raw HMX. In this work, the successful application of LLIC to energetic materials is demonstrated, thereby providing a potential method for the preparation of hierarchical structure of high‐energy ammonium nitrate explosives.

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“…The piezoelectric micro-jet, which can achieve drop-on-demand injection, is widely used in many fields, such as biomedical, electronic circuits, lubrication, 3D printing and chemical [1][2][3][4][5]. The droplets are ejected out of the nozzle under the excitation of pulse voltages, and researchers are focused on the optimization analysis of the excitation according, according to the research on the hydrodynamic characteristics of the micro-jet, to improve the injection performance [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Added Mass on the Working Frequency of Slapping Mode Piezoelectric Micro-Jet

Liu¹,

Li²,

Chen³

et al. 2016

Proceedings of the 2016 Joint International Information Technology, Mechanical and Electronic Engineering

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Abstract. The piezoelectric micro-jet is a multi-physics coupling device which contains electro-mechanical coupling, fluid-structure coupling and gas-liquid two phase flow coupling. The fluid-structure coupling is mainly referring to the coupling effect between the piezoelectric vibrator and the fluid. Generally, the working frequency of the micro-jet is the resonant frequency of the vibrator which is affected by the fluid-structure coupling. The fluid-structure coupling effect of a kind of micro-jet, which is used for the bearing lubrication, is analyzed in this paper. The added mass is created on the piezoelectric vibrator due to the strong fluid-structure coupling effect, as the vibrator of the micro-jet is immersed in the lubricating oil. The added mass of the piezoelectric vibrator, which directly influences the resonance frequency, is studied in this paper. The relationships between the influence factors and impact strength of the added mass are analyzed and the method of reducing the effect of additional mass is presented. In addition, the adjustment scheme of the working frequency of the micro-jet by taking advantage of the additional mass effect is given.

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Interfacial sol–gel processing for preparation of porous titania particles using a piezoelectric inkjet nozzle

Cited by 20 publications

References 33 publications

Novel preparation method of nitrogen-doped TiO<sub>2</sub> hollow particles by the reaction crystallization in refined droplet

Novel preparation method of nitrogen-doped TiO<sub>2</sub> hollow particles by the reaction crystallization in refined droplet

A Three‐Dimensional Hierarchical Dandelion‐Like HMX Architecture Formed at a Liquid‐Liquid Interface

Effect of Added Mass on the Working Frequency of Slapping Mode Piezoelectric Micro-Jet

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