公开(公告)号：US10035139B2

公开(公告)日：2018-07-31

申请号：US15194985

申请日：2016-06-28

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jeung Ku Kang ,  Dong Ki Lee ,  Gyu Heon Lee ,  Yong-Hoon Kim ,  Ji Ii Choi

IPC: B01J23/06 ,  B01J23/18 ,  B01J23/20 ,  B01J23/22 ,  B01J23/30 ,  B01J23/745 ,  B01J23/80 ,  B01J23/84 ,  B01J23/888 ,  B01J27/24 ,  H01L31/18 ,  B01J35/00 ,  B01J37/34 ,  B01J21/06 ,  B01J23/755

CPC classification number: B01J27/24 ,  B01J21/063 ,  B01J23/755 ,  B01J35/0033 ,  B01J35/004 ,  B01J37/348 ,  B01J37/349

Abstract: The present invention discloses a method for improving solar energy conversion efficiency using metal oxide photocatalysts having an energy band of core-shell structure for ultraviolet (UV) ray and visible light absorption, comprising a first process of forming a nanoparticle thin film layer; a second process of preparing a core-shell metal oxide on metal oxide nanoparticles by a plasma reaction under a hydrogen and nitrogen gas atmosphere, and a third process of depositing a transition metal on surfaces of core-shell metal oxide nanoparticles to produce a photocatalyst for energy conversion. A great amount of oxygen vacancies is formed in a shell region by the core-shell metal oxide to achieve effects of improving transfer ability of electron-hole pairs excited by light, and extending a wavelength range of absorbable light to a visible light region by changing a band-gap structure.