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Functional structure and production method for functional structure

A structural and functional technology, applied in the field of functional structures of metal oxide particles, can solve the problems of no disclosure, sintering, agglomeration, etc., and achieve the effects of saving resources, suppressing reduction, and suppressing agglomeration

Pending Publication Date: 2020-01-14
HOKKAIDO UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in the catalyst described in Patent Document 3, there is no disclosure about the use of catalyst fine particles held (supported) on a skeleton body (carrier). In the case of a body structure, it is generally difficult to contain catalyst particles inside the frame body, and only a configuration in which the catalyst particles are held (fixed) on the outer surface of the frame body can be adopted. If this structure is used, there will be the following problem: the catalyst particles are separated from each other Agglomeration (sintering) is likely to occur due to the influence (action) of force (pressure) and heat from exhaust gas (fluid) such as nitrogen oxides

Method used

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  • Functional structure and production method for functional structure
  • Functional structure and production method for functional structure
  • Functional structure and production method for functional structure

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Embodiment 1～384

[0117] [Synthesis of precursor material (A)]

[0118]A mixed aqueous solution obtained by mixing a silica agent (tetraethoxysilane (TEOS), manufactured by Wako Pure Chemical Industries, Ltd.) and a surfactant as a templating agent was prepared, and the pH was adjusted appropriately. The hydrothermal treatment was performed at 80°C to 350°C for 100 hours. Afterwards, the generated precipitate was filtered, washed with water and ethanol, and then fired at 600° C. for 24 hours in the air to obtain precursor materials of the types and pore diameters (nm) shown in Tables 1 to 8 ( A). In addition, as a surfactant, the following ones are used depending on the type of precursor material (A) (“type of precursor material (A): surfactant”).

[0119] ・MCM-41: cetyltrimethylammonium bromide (CTAB) (manufactured by Wako Pure Chemical Industries, Ltd.)

[0120] · SBA-1: Pluronic P123 (manufactured by BASF)

[0121] [Production of precursor materials (B) and (C)]

[0122] Next, depending...

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PUM

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Abstract

Provided is a functional structure that can suppress agglutination of metal oxide fine particles and that, by preventing degradation of the function of the metal oxide fine particles, functions stablyover a long period of time. The functional structure (1) comprises: a skeleton (10) that has a porous structure that is configured from a zeolite-type compound; and at least one type of metal oxide fine particles (20) that are inside the skeleton (10) and contain a perovskite-type compound. The skeleton (10) has passages (11) that communicate with each other, and the metal oxide fine particles (20) are in at least the passages (11) of the skeleton (10).

Description

technical field [0001] The present invention relates to a functional structure comprising a framework body having a porous structure composed of a zeolite-type compound and metal oxide fine particles containing a perovskite-type oxide, and a method for producing the functional structure. Background technique [0002] Nitrogen oxides (NO x ) and other environmental catalysts for exhaust gas and volatile organic compounds (VOC), examples include perovskite-type oxides (eg, Non-Patent Document 1). [0003] As an environmental catalyst using a perovskite-type oxide, for example, Patent Document 1 describes a decomposition catalyst whose composition of at least one of metal composite oxides as an active component of a nitrogen oxide decomposition catalyst is given by the general formula AB 1-x m x o 3+-z (wherein, A is a metal selected from alkaline earth elements, B is a metal selected from titanium group elements, M is a metal selected from iron group, platinum group or copp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/035B01J29/40B01J29/46B01J29/65B01J29/68B01J29/70B01J29/76C01B37/02
CPCB01J29/035B01J29/40B01J29/46B01J29/65B01J29/68B01J29/70B01J29/76C01B37/02B01J29/061B01J23/002B01J23/10B01J29/08B01J29/7007B01J29/18B01J37/0018B01J37/10B01J37/0211B01D53/8628B01D53/8668B01D53/9409B01D53/944B01D2255/402B01D2255/50B01D2257/404B01D2257/708Y02A50/20B01J35/19B01J35/56B01J35/393B01J35/45B01D53/94B01D2255/2042B01D2255/2063B01D2255/2073B01D2255/20746B01D2255/2092B01D2255/9202B01J29/7049B01J29/72B01J29/78B01J29/655B01J29/67B01J29/405B01J29/16B01J29/69B01J29/48B01J29/14B01J29/0356B01J29/085B01J29/44B01J29/0352B01J29/12B01J29/74B01J29/7669B01J29/072B01J29/076B01J29/7084B01J29/068B01J29/7869B01J29/0358B01J2229/14B01J2229/186B01J29/89B01J23/44B01J23/26B01J23/16B01J23/6447B01J23/02B01J23/72B01J23/08B01J23/74B01J23/34B01J23/60B01J23/64B01J23/83B01J23/8946B01J23/8953B01J23/78B01J23/896B01J23/80B01J23/89B01J23/894B01J23/825B01J23/8986B01J23/8993B01J23/8873B01J23/8871B01J23/8892B01J23/8872B01J23/8874B01J23/8876B01J37/18B01J37/0205B01J23/8878C01B39/02B01J23/8877B01J35/23B01J35/394B01J35/643B01J35/647
Inventor 增田隆夫中坂佑太吉川琢也加藤祯宏福岛将行稻森康次郎高桥寻子马场祐一郎关根可织
Owner HOKKAIDO UNIVERSITY