公开(公告)号：US10173199B2

公开(公告)日：2019-01-08

申请号：US15522148

申请日：2015-09-30

Applicant: TOTO LTD. ,  Japan Technological Research Association of Artificial Photosynthesis Chemical Process

Inventor： Hiromasa Tokudome ,  Sayuri Okunaka

IPC: B01J21/06 ,  B01D53/88 ,  B01J35/00 ,  B01J37/02 ,  C02F1/48 ,  C02F1/72 ,  B01J37/03 ,  B01J37/04 ,  B01J37/08 ,  B01J23/00 ,  B01J23/10 ,  B01J27/24 ,  B01J37/00 ,  C01B3/04

Abstract: Disclosed are metal nitride photocatalyst particles and/or metal oxynitride photocatalyst particles having high dispersibility. The metal nitride photocatalyst particles and/or metal oxynitride photocatalyst particles having high dispersibility can be obtained by containing metal nitride photocatalyst particles and/or metal oxynitride photocatalyst particles, which are capable of splitting water under visible light irradiation, and a phosphoric acid polymer that is adsorbed on the surface of the particles. Further, because these particles have high photocatalytic activity under visible light irradiation, splitting water by using these particles can generate hydrogen and/or oxygen with high efficiency.

公开(公告)号：US20150251172A1

公开(公告)日：2015-09-10

申请号：US14429986

申请日：2013-09-20

Applicant: TOTO LTD.

Inventor： Hiromasa Tokudome ,  Sayuri Okunaka

IPC: B01J35/00 ,  B01J23/22 ,  B01J23/58 ,  B01J23/30

CPC classification number: B01J35/004 ,  B01J21/063 ,  B01J23/22 ,  B01J23/26 ,  B01J23/30 ,  B01J23/58 ,  B01J23/6482 ,  B01J23/6527 ,  B01J35/0006 ,  B01J35/0013 ,  B01J35/006 ,  B01J35/023 ,  B01J37/0215 ,  B01J37/0236 ,  B01J37/04 ,  B01J37/08 ,  B01J2523/00 ,  C01B3/042 ,  C01B13/0207 ,  Y02E60/364 ,  Y02P20/133 ,  Y02P20/135 ,  Y10T428/25 ,  Y10T428/2982 ,  Y10T428/2991 ,  B01J2523/24 ,  B01J2523/47 ,  B01J2523/57 ,  B01J2523/67 ,  B01J2523/822

Abstract: Disclosed is a composite photocatalyst comprising photocatalyst particles for hydrogen generation and photocatalyst particles for oxygen generation that possess a high activity level of splitting water under visible light irradiation. Also disclosed is a photocatalytic member comprising a composite photocatalyst-containing photocatalytic layer fixed on a substrate. The composite photocatalyst comprises visible light responsive photocatalyst particles for hydrogen generation having a primary particle diameter of not more than 100 nm and visible light responsive photocatalyst particles for oxygen generation, the visible light responsive photocatalyst particles for hydrogen generation being in contact with the visible light responsive photocatalyst particles for oxygen generation.

Abstract translation: 公开了一种复合光催化剂，其包含用于产氢的光催化剂颗粒和用于产生氧的光催化剂颗粒，其在可见光照射下具有高活性水平的分裂水。 还公开了包含固定在基材上的复合光催化剂光催化剂层的光催化剂。 复合光催化剂包括一次粒径不大于100nm的可见光响应光催化剂颗粒和可见光响应性光催化剂颗粒用于产生氧气，用于产生氢的可见光响应光催化剂颗粒与可见光反应 用于产氧的光催化剂颗粒。

公开(公告)号：US10744495B2

公开(公告)日：2020-08-18

申请号：US15745085

申请日：2016-07-29

Applicant: TOTO LTD. ,  THE UNIVERSITY OF TOKYO ,  Japan Technological Research Association of Artificial Photosynthesis Chemical Process

Inventor： Hiromasa Tokudome ,  Sayuri Okunaka ,  Kazunari Domen ,  Takashi Hisatomi ,  Qian Wang ,  Qingxin Jia

IPC: B01J35/00 ,  B01J23/58 ,  B01J23/63 ,  B01J23/847 ,  B01J23/31 ,  B01J23/78 ,  B01J23/887 ,  B01J37/03 ,  B01J35/02 ,  B01J23/652 ,  B01J23/89 ,  B01J27/24 ,  C01B13/02 ,  B01J23/62 ,  B01J23/648 ,  B01J23/86 ,  C01B3/04

Abstract: A photocatalytic member comprises a base and a photocatalytic layer fixed on the base. The photocatalytic layer comprises first photocatalyst particles being visible light responsive photocatalyst particles for hydrogen generation, second photocatalyst particles being visible light responsive photocatalyst particles for oxygen generation, and conductive particles which are provided between the first photocatalyst particle and the second photocatalyst particle, have Fermi level at a negative position relative to an electronic energy level at the upper end of the valence band of the first photocatalyst particle and at a positive position relative to an electronic energy level at the bottom end of the conduction band of the second photocatalyst particle, and are able to store an electron and a hole. In the photocatalytic layer, the conductive particles are located to be coupled to both the first photocatalyst particles and the second photocatalyst particles.

公开(公告)号：US09808791B2

公开(公告)日：2017-11-07

申请号：US14404561

申请日：2013-05-29

Applicant: TOTO LTD.

Inventor： Hiromasa Tokudome ,  Sayuri Okunaka

IPC: B01J23/58 ,  C01B3/04 ,  C01B3/06 ,  C01G23/00 ,  B82Y30/00 ,  B01J37/03 ,  B01J21/06 ,  B01J23/46 ,  B01J35/00 ,  B01J35/02 ,  B01J37/02 ,  B01J19/12

CPC classification number: B01J23/58 ,  B01J19/127 ,  B01J21/063 ,  B01J23/464 ,  B01J35/004 ,  B01J35/023 ,  B01J37/0211 ,  B01J37/033 ,  B01J37/036 ,  B82Y30/00 ,  C01B3/04 ,  C01B3/042 ,  C01B3/06 ,  C01G23/006 ,  C01P2002/50 ,  C01P2002/54 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/64 ,  Y02E60/364 ,  B01J2523/00 ,  B01J2523/24 ,  B01J2523/47 ,  B01J2523/822

Abstract: Disclosed is a visible light responsive photocatalyst that simultaneously realizes high crystallinity and refinement of primary particles. Also disclosed is a photocatalyst composed of secondary particles that have a high porosity and are aggregates of fine primary particles. Rhodium-doped strontium titanate that is a visible light responsive photocatalyst of the present invention has a primary particle diameter of not more than 70 nm and has a absorbance at a wavelength of 570 nm of not less than 0.6 and a absorbance at a wavelength of 1800 nm of not more than 0.7, each absorbance determining by measuring a diffuse reflection spectrum, the rhodium-doped strontium titanate having a high water-splitting activity as a photocatalyst.

公开(公告)号：US20150107984A1

公开(公告)日：2015-04-23

申请号：US14404561

申请日：2013-05-29

Applicant: TOTO LTD.

Inventor： Hiromasa Tokudome ,  Sayuri Okunaka

IPC: B01J23/58 ,  B01J35/00 ,  B01J19/12

CPC classification number: B01J23/58 ,  B01J19/127 ,  B01J21/063 ,  B01J23/464 ,  B01J35/004 ,  B01J35/023 ,  B01J37/0211 ,  B01J37/033 ,  B01J37/036 ,  B82Y30/00 ,  C01B3/04 ,  C01B3/042 ,  C01B3/06 ,  C01G23/006 ,  C01P2002/50 ,  C01P2002/54 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/64 ,  Y02E60/364 ,  B01J2523/00 ,  B01J2523/24 ,  B01J2523/47 ,  B01J2523/822

Abstract: Disclosed is a visible light responsive photocatalyst that simultaneously realizes high crystallinity and refinement of primary particles. Also disclosed is a photocatalyst composed of secondary particles that have a high porosity and are aggregates of fine primary particles. Rhodium-doped strontium titanate that is a visible light responsive photocatalyst of the present invention has a primary particle diameter of not more than 70 nm and has a absorbance at a wavelength of 570 nm of not less than 0.6 and a absorbance at a wavelength of 1800 nm of not more than 0.7, each absorbance determining by measuring a diffuse reflection spectrum, the rhodium-doped strontium titanate having a high water-splitting activity as a photocatalyst.

Abstract translation: 公开了可见光响应光催化剂，其同时实现初级颗粒的高结晶度和细化。 还公开了由具有高孔隙率的二次粒子构成的光催化剂，是具有微细的一次粒子的聚集体。 作为本发明的可见光响应性光催化剂的铑掺杂钛酸锶的初级粒径为70nm以下，波长570nm处的吸光度为0.6以上，波长1800的吸光度 nm不大于0.7，通过测量漫反射光谱确定每个吸光度，具有高水分裂活性的铑掺杂钛酸锶作为光催化剂。