Title:
PHOTOCATALYST PRODUCTION METHOD, AND HYDROGEN AND OXYGEN PRODUCTION METHOD USING SAID PHOTOCATALYST
Document Type and Number:
WIPO Patent Application WO/2023/113019
Kind Code:
A1
Abstract:
The present invention provides a photocatalyst that, with a YTOS composition or a composition in which the yttrium in YTOS is substituted with another element, has markedly improved water splitting ability. Provided is a production method for a photocatalyst having a composition represented by general formula (I), said production method being characterized by comprising a step for mixing, with a raw material for the photocatalyst and at a mass ratio of 0.01-50 times with respect to the raw material, a flux component comprising one or more of an iodide and/or a chloride of one or more elements selected from among Li, Na, K, Rb, Mg, Ca, Sr, and Ba, and performing firing at 450-1,050°C. MaTibOcSd ... (I) (where M is one element or a combination of two or more elements selected from among Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Y, a=1.7-2.3, b=2, c=4.7-5.3, and d=1.7-2.3.)
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Inventors:
YOSHIDA HIROAKI (JP)
TSUTSUMINAI SUSUMU (JP)
KARIYA NOBUKO (JP)
DOMEN KAZUNARI (JP)
HISATOMI TAKASHI (JP)
LIN LIHUA (JP)
TAO XIAOPING (JP)
LIANG XIZHUANG (JP)
TSUTSUMINAI SUSUMU (JP)
KARIYA NOBUKO (JP)
DOMEN KAZUNARI (JP)
HISATOMI TAKASHI (JP)
LIN LIHUA (JP)
TAO XIAOPING (JP)
LIANG XIZHUANG (JP)
Application Number:
PCT/JP2022/046448
Publication Date:
June 22, 2023
Filing Date:
December 16, 2022
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
UNIV SHINSHU (JP)
JAPAN TECH RESEARCH ASSOCIATION OF ARTIFICIAL PHOTOSYNTHETIC CHEMICAL PROCESS (JP)
UNIV SHINSHU (JP)
JAPAN TECH RESEARCH ASSOCIATION OF ARTIFICIAL PHOTOSYNTHETIC CHEMICAL PROCESS (JP)
International Classes:
B01J27/045; B01J35/02; B01J37/06; B01J37/08; C01B3/04; C01B13/02; C01G23/00; C25B1/04; C25B1/55; C25B9/00; C25B9/50; C25B11/049; C25B11/052; C25B11/077; C25B11/087; C25B11/093
Foreign References:
| JP2020138188A | 2020-09-03 | |||
| JP2018058733A | 2018-04-12 |
Other References:
MA GUIJUN, CHEN SHANSHAN, KUANG YONGBO, AKIYAMA SEIJI, HISATOMI TAKASHI, NAKABAYASHI MAMIKO, SHIBATA NAOYA, KATAYAMA MASAO, MINEGI: "Visible Light-Driven Z-Scheme Water Splitting Using Oxysulfide H 2 Evolution Photocatalysts", JOURNAL OF PHYSICAL CHEMISTRY LETTERS, AMERICAN CHEMICAL SOCIETY, US, vol. 7, no. 19, 6 October 2016 (2016-10-06), US , pages 3892 - 3896, XP093073358, ISSN: 1948-7185, DOI: 10.1021/acs.jpclett.6b01802
MA GUIJUN, KUANG YONGBO, MURTHY DHARMAPURA H. K., HISATOMI TAKASHI, SEO JEONGSUK, CHEN SHANSHAN, MATSUZAKI HIROYUKI, SUZUKI YOHICH: "Plate-like Sm 2 Ti 2 S 2 O 5 Particles Prepared by a Flux-Assisted One-Step Synthesis for the Evolution of O 2 from Aqueous Solutions by Both Photocatalytic and Photoelectrochemical Reactions", THE JOURNAL OF PHYSICAL CHEMISTRY C, AMERICAN CHEMICAL SOCIETY, US, vol. 122, no. 25, 28 June 2018 (2018-06-28), US , pages 13492 - 13499, XP093073360, ISSN: 1932-7447, DOI: 10.1021/acs.jpcc.7b12087
TAKADA, TSUYOSHI ET AL.: "Photocatalytic activity under visible light irradiation by Ln2Ti2S2O5 photocatalyst", PREPRINTS OF THE 92ND FORUM A OF CATALYSIS SOCIETY OF JAPAN MEETING, 3C24, 18 September 2003 (2003-09-18), pages 108, XP009547160
MA GUIJUN, KUANG YONGBO, MURTHY DHARMAPURA H. K., HISATOMI TAKASHI, SEO JEONGSUK, CHEN SHANSHAN, MATSUZAKI HIROYUKI, SUZUKI YOHICH: "Plate-like Sm 2 Ti 2 S 2 O 5 Particles Prepared by a Flux-Assisted One-Step Synthesis for the Evolution of O 2 from Aqueous Solutions by Both Photocatalytic and Photoelectrochemical Reactions", THE JOURNAL OF PHYSICAL CHEMISTRY C, AMERICAN CHEMICAL SOCIETY, US, vol. 122, no. 25, 28 June 2018 (2018-06-28), US , pages 13492 - 13499, XP093073360, ISSN: 1932-7447, DOI: 10.1021/acs.jpcc.7b12087
TAKADA, TSUYOSHI ET AL.: "Photocatalytic activity under visible light irradiation by Ln2Ti2S2O5 photocatalyst", PREPRINTS OF THE 92ND FORUM A OF CATALYSIS SOCIETY OF JAPAN MEETING, 3C24, 18 September 2003 (2003-09-18), pages 108, XP009547160
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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